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    ABSTRACÉ." GB? 'äfï-íïšl DISCLÛSURE A doxvn~the~hoïe driií hanlnaer having a hoxxsiïxg, a 'baciezhßad and a. tuhuiaa* siicïixxg checkvaivfi assexníwifyf thai incíudßs a distai end, a tšcareadcd male proximai and., a suppíy iniet altid anexhaust :sort The ßxhaust port cøznanuaaicates hetvveen an interim* sf the. hackhsad arid an exteriør ofihs haskhfzad. Thai 'iušrvflxïar slidiïzg Check valve assemhíy inclucífis a distrih11ifi1', a síidiaxg valve, and a.Etfiaszíng member; The åistríbutox* has a central øpfznhæg extcnding áhrnugåx the disíributor, an apermrcextenàiïag through the aiistrihuxtør, and ah exhausï gaiiery, The shding vaivf: is sšidabíe aiøng tha hfmtral øpcning. The biasing nxeanitfer hiascs íhe síicíing vaivfi to a cíßseá posiïiøn., goøzhøzsxsw-fi;
    公开号:SE1150985A1
    申请号:SE1150985
    申请日:2011-10-21
    公开日:2012-04-22
    发明作者:Leland H Lyon；Warren Thomas Lay
    申请人:Ct Rock Inc；
    IPC主号:
    专利说明:

    1G IS Rx)LJ: "fïTLE GF ÜEÜHE .EÉNXITENTION Dexvnflthefïítrïe ïïšriiï ï-íernrrrer Having a Síifïíng, ššlxiirausï Círeek 'Vašve EíäfiíšïfiCROSS tRršššâïíå-RENCE TO RELATIED ÅAPPLICATLEÅGNSíüüššïfi The preserrt epgašieatierr, 'rs a continuaiiervir:»part ef pemíing Patent Agapiieation 121361 ,263, .Fried January' 23, ÉÛQÉF, entitíeai “Denfn-the-Ifïoirf Drili Reverse Exhauet Systenrj” the entire, diseiesurt: otïzxfhieh is hereby" ineerfporattëtï herein hgv' reference.viflšACfšíGRüíiNï) šfišï 'PHE INXTENTIÛN Ei E) 331 "fire present inventierr reíetes te e, åotrfrntheåroíc: dršâå ÜDHDÜ hanrrner. in rrartierriar,tïre present inxfentíen relates te a iår-H åramrner having a síidirrg exíraust streck vahfe essenrbšy and:nere particularly", a síiding exnaust cheek *valve assernnïy' that eernbines supply and exhaust cheektfaïves inte a. single rrnir epearatíon. iíšüšMš }1a.rrrrtrer'”s interior' front its exterior erwirtvnnrent, such es tveter arrcï debris. The seeís are knerwrr as :Typieai ïfšššåi E) hanrnrers rrtííizt: what is Émerfarr as “tre-active” seals for sealing the BHD “reaetivff senïs bettanse they require the mnvrfirrrerrt rrffexíranst íïow to dispiace er open flow'passagevaarfys vaitnin tíre DHD hamrner, råïrswever; such DHÜ irarnnrers else require tírat trxíraustpressures åre rníninrizeá rer ger-einer funetionirrg ef the ïšïš-íš) harnntert Ars such, the level ef reaetiveíbreesffpressrrres for the “reaetive” Seals were also rnininrizerå, thereby petentiai Ey rregativeíy'irngractšng the “reaetive” seaïs erfšfeetíxferress, ïfiššßšš aritiresses title frrregsaíng Eínntatiens trfreaetitfe Seals.
    A DHD nennner, such as the present imferrtien, haxfing a eiicïirrg exíiranst check vaive BRHEE* SUÄ/ïn/ÉARY OF fšffi-šE .šáNVENfïïifšNt iššššütšfi ' En a preferred ernnruriínrent, the present. irwentierr prerfiries e devan-ttrefïfrraíe drilí hzrrnrnereernprisirrg a hnnsing, a 'baelttreerrí arrd a tubušar siitššng cheek xfahfe assentbíy. 'ífïne baekheati is positioned at a proxirlaei end of the høusirïg and irreiudes a distal end, a títreaded rnaíe prexirnaí end,a supply irriet and an exhaust; port. "Fire srrppíy' irrlet reeeixfes a. suppíy ef xfverítirrg tïrrid te en interírærof the baektread. The exíraust port provides før aennnranitfatien betwveen the interior of the baeíthead and. an exterior of the natet-these. The tuïrrrian" siifhng check xfahfe assenrbïy' is *vvithin tïfre heusirrg ii) i)UI proxirnate to the heekhead. Tiie siiding check *vnive nssetnhiy incindes a tiisttihntor, e siidiiig tfaive,and a itiasiitg inemher, 'the diettihntot has e, centrai opening, en apettttife extending through thedistribute: and ofiset from the eentrai openittg for oiiowiztg tite passage of tvotking tittid tinfotigh thediettiihnttnj., aint en exhattst gallery' for eoinmtitiieatittg hetvveeii the feenttai opwening and the exhaitetport. The siidiiig tfahfe is siidahie ttiong the central ttpening and niovnhie hettveeit a closed position:and an open position. The siiding vaive has e eiosed ptoximai enoi, em open distei end, and enopeiiiitg about a. inidseetion of the siiding tfaive. in the closed position, a proxhtiai eitd of the siidhigtfaive seeiingiftf engages the suppiy intet aind a distaí end of the siidiitg vaive seaiingiy engages enintet opening of the exhenst gaiiety. in the open position, the siiding valve is offset from the stippijy'intet, the openinigs of tite siitiing valve are in eotnmnitieatioii with the exhattst gaiiery, and thestippigf iniet is in comtnnnicatioii nfith the epertnte extendittg tittottgit the disttihntot. The hiesiitgtneniher itiases the siitiiitg vdive. iüütfli dowrotiie-itoie thiii itatnmet eoinprisiiig n itonsing, e haehiientig :end o tuitfttiat' siiiiing eiaecit tfaive in aceordance vaith eitotitei* preferred ettihocíiritettt, the presfsnt inveritiott provides a assembly. The backheitd is positionied at e proxíntai ettd of the itousing anod includes a tiistei end, nthreanied titaie tiroxiniai einti, n stxppiy intet tor teeeivhtg a stippijtf ofvvtsrking tiiiid to en interior et'the hackhead, en exiintist port. for eointnnnieating hettveeii the interior of the haeïkhead and attexterior of the hacithenti, o. tntiniei' distai end, and a. tapered tnidsectittii interior in coinmttniitetitänttfitii the snppiy' iniet. The tapeted. ntid seetioii interior ineitnies e tftnstitocotiicni section ztdj aeent thesitppiyf intet, and n tuhniair section och ecent the tittstttoeotticaii section. The tnivniei' siitihtg eheehvalve ossenihiy is honsed ttfititiit the hotishtg ptoxiinate to the heekitead. The siitiing cheek tfaiveesseinhiy inehides n iiistrihtitotg a siiding tvaitfe, and e. hiasing xneinher, The disttihtittor has a centretttptfiiiittgf, an epettiite extendiiig through, the tiistriittttor in en axiai direction diod oitffset from theeentrai ttpeniitg tiot' niiottfing tiie passage of *evotiting fhtid "thtougii the tiistrihtitoifl, and an tfxiienstgaitery for communicating hetvtfeett the eeittini tipenitig and the exhattst port. The siiding flfnitfe issiitiithie aiong the eezntfrai opening and inovahie itfetttweent e closed position and en open position. Thesiiding, ifaive inciudes a chosed tntoxiniai eitd, en open (het-ni end, and en opening ehont a midseetiotiof the siiding xfaive, 'The ihiasing menthet' hiaoing the siioïing valve to the eit>sed_ tiositioai. in theclosed position, :i ptoxiinni end of the siiding vaive seaiingiy engages the stippiy' iniet sind a distaiend ot" the siiding vaive seaihtgiy' etigeges en intet (mening of the exhaïtist geiiery. in the iipen position, the siiding vaive is itiišet from the enpttiy iniet, the otveniitgs of the siiding xfaive are in h) geez-:izïitfitvst IÛ commiiiiicaiiaii *witii the exhaust gašieiy, and. the suppiy intet is in eeinmuiiicaiiaii with the apartaireexten-fíing tiiiaiigii the aiisiriiiiiiai:itihíißi dainfnßtiie-iaaiefi iiriii hammet' that iiieiuaifias a housing, a hacithead, a tuhuïai' siitiihg ehfseit *valve in aacardaiiae With yet another preferred enihadihiarit, tha iircseiit iiiveiitien previties a assemhiyg a iiiasiiig member, a saiidasore pistan and a. seai. 'The hackhaaci is iacateci ai a piaiziinaland of the housing ana iaeiades a suiipiy intet for recaiviiig a supply of *iifßrking tiuid to an inteiiei'of the haekfhead. The tiihiiiai* shdšng aiieck vaiva assearihiy' is iiouseii *afitifiiii the housing anti iecatecíprexímaie tiie hzicifiïhead. Tiie siidiiig check ifaive assembly includes a ciistiihiitøi' sind a siídiiig vaivesiiåahie aiang the distrihutaï. 'ifha siiding ifaive iias a eitised iirexiniai end, an open dístai eiici, anepening :about a micisectiaii of tha siiding vahfe, and an iniwaixíiy exteiidirig iïange, wherehi theiiivifardiy exteiiciiitg flahga iias a distaiiy faaing suïface area. The hiasiiig manihci hiases the siícliiigi/alve tia seaíingšy eiigageithe ciesed: proximai må to the siippiyf iniet. Tiie is iocateti piraximate a ciistaï end iiftha housing hetwean tiie soiiaheore pistoii and tiia housing, iišüißi in accerciarice ivith zinøtihei pfefeiwred ehihatíinieats the pireseiit iiiveiition proviåas aiiiivifii~tïiaähciia driii iiaininer tiiat iiieludes a iioiising, a haaizíiaaii, a tahuiar siitiiiig check vaiveassemhiy, a hiasihg iiiainhai", a saiifisceia pisteri, a. seai aha a drive ahamhar. "fïie haaklïaatí islocated at a piaximai end ef the hausihg aiid includes a supply iiihæt for ifeceiving a. ñøifv' ai suppiypressure ta ah intarier af the iiaekiiead. The tiihuiar siidiing cheek valve assembly is imusetí withirithe iieusiiig and ieeateá proxirhfatte the haekhead. Tha siidiiig eheck. :fait/fe assenthiy iiiciiicïas adistrihutar and a. shciirig vaive siidahie along the fíistrihutari Tiia siiciiiig vaive has a eioseii gïiinxiinaiand, an open distai and and ah epeiiing aheut a ntidsett-tifih of the šiicíiiig vahfe. The hiasitngineinbei' biasas the siiding vaive te seaiingïy eiigage the ciased. pfoxiniai and to the sappiy iiiiat.
    'The Seat is ioeaieå proximate a. ciisiai and. of the housing iietiveen the soiíci~coi°e pts-ten and thehousing. The cirivar ehaihhei' is pasitianed heiivifeeii the hackheaaí and the soiithcera piston. Theclosed pgroxiinai arici ofthe siiding valve seaiingiy engages the siippiy intet izwiiiie the soiiaæørepiston sfiæziiíiigigv' engages the Seal pwxiinate the iiistai enci of tha heusing ivhen a tic-ia' of siippiypressurie catering the tiavvizi-tiie-iiaše driii harhnier is tiiscentiiiued ta :naihiaiii an elevated piessiire iifitiiiri tiie tiiive chahiiiei:ÃiÉšRiišli DESCRïPÉïiON OF THE- SEXJÃEEIRAL VíEiiifS OF THE ilüšAWihiGS itiiiitii The faiegaing sumriiaijif, as *ii/ell as the foiiaiwiiig detaiieá description af the invaiitioii, Will he iietter untiefstoøii wíieri reati iii eeiijiinction afith the appendeá (iiavvings. For the purpøse of 3goozfizaasws; kxnå'íJz k *Ja iflttstrating the inventíen, there are siiewit in the iiravvings entitetiiiitents that are pifesentiy preferred.it shefttitå be uiitieifsteeä, iievtfetfer, tiiat the intfentieit is net iimited te the preeise aivaitgeinents and instrumentaíities siiewit. 1111M11 in tiie drawiiigs: 11111121 Fig. 1 is a perspective vievv' of a BHD iiamnter in aeeertiaitee With a preferredeinbeciíment ef tiie piesent inventien; tüttišfi Figø 2 is a erressseetieiiai, e1evationa1 view ef the BHD haminei* ef Fig. 1; itštiißii Fig. 3 is a eress-seistieiiai, ekvvatitinaš view efthe 13111) iiammei ef Fig. 1 vaitii a eress- seetíen taken through an exfiiaiist port ef a baekiiead; 1331511 Fígi 4 is a perspective *view of a backheatí ef the 131-11) itaminefir effifig. i; Etitiieïfi Tåliga 5 is a eifess-sectienai, eieifatieiiaå vfiew eitite baekiiead ef Fig. 4; štifiïïi Fig. (i is a perspective, eiess-seetienaâ vievv* ei“the baekhezitd tiífišfig. 4; iiißiåi Tiiig. 7 is a perspeetitfe vietv ef a distributer of tite DHÜ kaminen” ef Fig. 1; 1 Fig. S is a erosseeetienaL eietßatieitai view ef the distfibuter efíiig. 7; www Fig, 9 is a eress-seetienai, eievatioiiaí 'view of the distribiiter ef Fig. 7 vvfith a eress~ seetieti taiteit thieugh an exhaust gafleftf; 1951211 Fig. 1G is a tep p1an view ef the iíistributer ef Fige 7; íüiišïfi Fig. 11 is a “tffettein perspective, vievtf ef a sñtiiiig vaive of the BHD hainineif of Fíg. 1;1113231 Fig» 11A is a bettein tieifspeetive view ef en zilâtetfnative embediinezit of a siiding vaiife efa BHD iiainmer efFig. 19A; tfitiíšfliš fiffig. 12 is a tep tëerspectitfe vfievv ef the siiciing vaive iii." iiig. 11; 11111251 Fig. 13 is a eress-seetienai, eíevationai vievtf ef the siidiitg valve ef Fig. 11 vvitit a cross»seetieii 'taken through a thretigh heie ef the siiding valve; štššiläiíiš iiig. 14 :is a erossßseetieiiai, eietfatienai vfiew ef the siiciing valve of Fíg. 11; íššflïš Fig. 15 is a perspective view efa detvei for assernbh' within the s1iding vaive of 11; 539281 iiig, 16 is a perspective: vievf (ff a screen ef the 111-11) haninier of Fig. i; ii¶t3å129} Pig, 17 is a perspective vievv' efa beiíevifle tvasher of the DI-ÉD haniiïier ef Fig. i;ififištiš Pig, 18 is a eirossfseetieiiai, eitwatitänai view efthe šaeiievilie vtfzislieif ef Figb 1.7; 1 šiülši] Pig, 19 is an. eniargecí, eressfiseetieitai, e1et1a^tieii2i1 vietsf efan iippex' portion ef the BHD harnntei* of Pig. i siietviitg the siifíing vaitfe in a e1ese<1 position; {OO'Z02385;v5} i (i 2G tütiåít Pig. 19A is en etiiztrged, eross-seetioiini, eievationat view ofan täpper iioition ofe Di-iï)hemmet shovving 'the siiding veitfe of 'Pig itA in e. eiosed position., in aeeortiatiee witit another enihodirneitt ofttie present iiweittioii; ttttišïšj Fi 2G is en eznierged, eroseoeetionaii, eievatioiiai view of en epitet portion of the BHDiiantiiiei" of Fig. i shotving the sii-:iing *fait/ie in en epeii position;ttttišßtt Fig. 21 is en eniatgeti, etossweeetionei, eievetionai vietv of en ttpper portion of the BHD hemmet ot" Pig. i siiowiiig the siiditig vaive in a. eiosect position With e etoss-secti on taken throughexiieiist poits of the iiaeithead;tfiüššt iteiniïiet of Fig. i showing the siitiing vaive in en open position. aiiti With a eioss-safetion taken Pig, 22 is en eiiiatged, ctossflseetiitinai, eievationaí Vien! ofnn ttppei* portion oftiie IDi-iD through exiiaust tiorts of the baekheati; ttttšištit Fig. 321%. is :ni enintgeii. eross-eeetioiiai, eievetionei *view of en tippei' poition ot a Ditt)hennnei" tiiet irieitttiee the stiding tfaiife of Fig. t. 1A; ttttiftfït Eiig. 23 is en enietgeti, perspective view of en inner housing of tiie DHB ihenirner of tfig.i; ttšíššâšt Ãiïig. 24 is en eietfetionai view! oftiie išiíilt) hannnei* ett-Fig. i Without n housing; ttttiâßt Pig. '25 is n. erossoeetioiiai, eietfationai view ofthe DHÜ itainmei* of 'tiig 22A in a tittan-tionrn tïiosititin; and tttthttšt Pig. 26 is en enintgeti., erosseeetioitai, eievationei Vien of a lower portion of the Ditt) hemmet tifFig. 1.Diïißiïigšiï) DESCRÉPTION OF "fi-tå iNX/'ENÉIÉON [titttâit Cettaiii terntiiioiegy is need in the toiiowiiig oeseriptieit for eonvenience oniy and is iiotíintiting. The ttfords “tightf “ïeftf “uppei",” and “iovvefi designztte fiireetitins in the drewings tottfiiiieii referenee is niatie. For piirposes of eoitvenieiiee, “ciistefi is genferailijv' refetreti to es toiwardthe titiii bit end of the Utšiiš hninititer, and “proxiinaf is generaity' referred to as tottfard the heei-:heaciend of the Dit-fit) hznninei; as iiitistinteti in iiig. i. Adåitionetiiy, the term “of as used in thesgseeiifieszttioit, means “at least one." 'Ihe terrninoiogy iiieindes the words above speoitieaiiy'rnentioriecí, derivatives theireof, and. tvords of simiittt initvoit. tätt-Qi in accorcieitee wvith n preferred embodhnent of tiie present inizeiition, there is sitetvvn. a DHD hannnieir tiiat inehities e housing 12, a haekiieeci '54 and e tuhtiiar siiding cheek *Jah/e asseniiiiy 4-6, inest shown in Figs. P4.
    Un (ÛGEÜZEXSJJSE lll lfš ltlthtšl The lioitsiitg l2 is generally cylintlricafl and contigtiietl to receive a tiortion ot' thehsckhead lll sno a portion of se thill hit lå, as liest showii in Figt l. 'The structure and operation ofthe lionsiiig l2 is knotvn in tlte art and tlteretbrt: e tletsil description of the liottsing l2 is notnecessary for eoinplete niitleistanding of the piesent inventioii. Honfttver, as sliown in Pig, 2, thehousing l2 includes intetriztl thteacls l2a and lišh shout its proxitnal end altid tlistal ens, respectively.The threatls l2a soil 12%; provide for s tlireeded connection of the hacltliead lšl anti the assembly ofthe tltill bit 15 to the lionsing l2. ttltlâfftt The heelçliead 14 is generally eoiitigàfottftl, as shotvti in ilïigs. l-6l Refeiiing to Pig. 4, thehscl-:heatl le includes s, ptoxltnal end 22, a tnitl portion 35 anti e distsl entl 290 The ptoxiinal end 22is geiierally oentigtited es s toohjoint connection for assembly to a drill string ot other tool (notshown) as known in the att. T he ptoxitnsl end; 22 else includes male thteatls 24 :list securing theproxiinal eiitl 22 to the chill stting (not sliovtfti), 'elfhe ctistal end 20 includes threads 2G en the exteriorsurface .tor otinnetttirig vvfith the ltottsing l2 vis the housing thteatls liša. liiite-ät slitling check valve assenibly 46 iiiclucles e tlistiibntor 48, se slitlíng valve 62 and a. hiasing inetnhei' The tnlitilsr slitiing cheek tfzilve assemhljy' 463, is shown in Figs. 2 and 3. The tohnlst líštš. 'the tulitilsi' sliding check valve asseinhly 46 is lieusecl ivithin the lionsiitg '32 ptoztitnete theheclthestl 146 Wheti thlly sssetnhletl Within the BHD hsinnier lll, the tnhitlai' slitling checlt tfalvoassenihly 46 is ltoused pattialljsf sfithin the hsttkliestl 14 and pattielly vvithiii the ptoitimal end of thehousing 12, ltlü46l Reteniiig to Figs. S and 6, the hacklietitl l-”t also includes a sttpply inlet 26 theat extentlshorn the tiroxiitiol end 22 to an interior region of the “baeltltead lift. Supply pressnies olahotit l St) to 45ll potintls per stlttsife inch tttsi.) ere typieallïvf supplied to the BHD liatnmei' 1G through thesupply inlet 26. Tlie iiiteriot° region 28 of the hztcltheatl 14- is contigoreci, ss liest shown in läge 5,stift iitolndes s tanerecl iniclsection 33 sind a tnliulsr distal end 44, 'lfhe interior ottlie tsiieretl.inidsection 33 tapeis inwarílljy' tfn the fprexiniatl direction. 'the tapeten rnidsectlon 33 iiicluäes e firstftustroctiiiicnle shapetl tvall section 34 that adj aeent the supply iiilet 26. fädjecent the lltstfrnstrocotiical infall section 34 is a. liist tubttlai" *avall section A second fiïtsttoeonicel Shaped *Nollsection 38 is adjacent the first tnhulsi' wall section 36. ftdjacent the second frustrootinical infallsection 38 is s. second tithnlai* Wall section 400 Atij scent the settotifl tubttlat xvell section 4G is s thirdíiftisttoooniosl sliapefl vifall section 42. Prefetahly, the ihst tfritsttoconical vtfall section 34 is distal tothe supply iiilet 26. llttrtherinore, the tirst tobulat vvall section 36 is tlistsl to tlieotirst tinstroconical »vall section E54, the second ftustrooonical. tivall section 33 is ttistel to the titst tubnlai well section 36, ti) t...Llï the second tohuier tvait section di) is tiistat to the see-ond frustrooonieai tvätt section 38, and the thirdftttstrtieonieat svett section 42 is disitet to the second ttibuier Watt section 4G.thttdfït (shotwn in iitg, 11 aiid deserihed iieioiflz) advohtegeotisif; protfides for en expotidtihte intet 'itie otintigiiratiori of the tapered rhidseetioh 33 in eohfihiiiatioti vaith the siiding tfeive 62 passagewey' 41 (Fig. 20) hettveeh the haetihead 14 and the siidiiig vnive 62 for eontinuniceting'oetitfeen the supply itiiet 26 and a iiinroiity of aperttites 52 (Pig. ti) exteridiiig through the distrihotor48, as tiirther described hetoiv. 'that is, as the eppiied suppiy pressure of Woriiiiig fltiitis sutïipiied hythe dritt string presstirizes the siidihg vatve 62, the stiding tfaive 62 moves distatirif within the teperedniidseotioti 33. As ttie siittirig 'vatve 62 tratfets or stides tiistetty, the intet passagtiwaj! 41 expandsdue to the distaiiy expending iiírterior watt suritiftte protite defined hy the pirogressiori ot"ifmstroeoniezit and ttrhuiar »ifatt sections 34, 36, 38, di) and 42. iišttdåi ettzerztnee oftttiwv eronird the siiding vnive 62 oritit an tipper portion 52:: (fåret, e tirustroeonieei 'ifhe otverati diameter of the siidtng veive 52 is sized to provide e retativety' smalt portion) of the stiding vatve 552 (Ftg. ti) nioves itistatty pest the seoond ttustifooonieet *tt/titt section38r, Preferahiy, the eieaienoe hetweeh the outside surface of the upper tiortiort 6221 and ttie territorierWait surithoe fit the interior is about (162 to 9,65 iiiehes, and more preferahty ehont 0.63 inehes,ihhdä the apettiires 52 of the distiihntor 48 tvlhen the siiding valve 62 is in the open position. "the intet tn general, the intet passageivey lit is in communication hettveen the siippty intet 26 and passogewvtiy' 41 is forined between the sttrthees oi' the oiiamfereti proxinioi end of the stidiirg vaive62 and at least the ttustroteonieat »vatt 34 arrd tuiitrtar' wait 36 of the iriterioi* 28 otdïhe heokiiead tft.ttthštii tfinid tfoitinoeo iiito the heot-:heed td :fideqiiattety eomtiresses or tbrees the hiasing itietnher 198 to "itie exiiaiidotite intet passagetwry 41 advatitegeousiy ertsures that the sutipty otovotïkirig triove the siiding 'veive :S2 to the ttrijiy orten position (Pig. 2G). This is e. key feature of the tnhtiiar'siiditig cheek valve asseintity' litt, because tvitiioiit the expendehie intet passagevvajtf fit, the siidingifatve (52 een heeohie stutzk in riiid~stroke or in oniy a patrtieiiiy opened position due to the piesstnfetorees ahoiae and betona the siidihg valve 62 equatizirig during the niovehieitt of the stidirig “veiife 62to the fiiiiy open position. itištštt The tuhntar distet tfrid 44 of the iteokhetiti 14 is eontitgored, as hest sïhtiifari ih Pig. 5 and tsdistat to the tapered initiseotioii 33, 'the ttrhitier distzd end 44 is oontigtrred to receive the distiihutor48. zthout o proxiiiioi, end of the tuhutai* distai end 44 is en exhaiist port. 3G that extends rattiaitytron: the iiiterior 2tš through the statt otthe trihuiai' distat end 44-. As streh, the fexhonst port 30 provides tbr titriti oornmuriioation, ttetvveen the interior' anti en exterior otthe haotthead 14 (iiig. ítšfirïtšlš gfšf; 3). _Pretferaii1y, the heeichead 14 iiieiticies a piuraiity iitiexiietist ports 311, anti inore pretezrahiff, sixexheust iiorts 3G. The pitiraiity of exhetist ports 3G ate ciifcuinferentiaiiy and eqnaiiy' sport-ed apart.The exhatist port: 30 also ineiufie e groove or geiiey štie that extencis .ttotn en. external sitrfaee of thehaekitead 14 totvards the tínroxiniei enn, 'as hest shown in Fig, 4. "ifhe geiiey 3132:, is eoníignreti. vvith asuhstantieiiy' ireotanguiar oi* ohioiig shape that is inset tiiitiiiit the Wait of the iieehheati 14. As iiestshovvn in Figi 6, e proxirnei enfi ot' the geiiey štie extentis or tntieirs rediaiiy and ontvvatoiy in theptoxiniei direetiott and termiitetes at ett outiet etui 31th that is pioximete the iiousing 12 (Fig. 3).tüßüisurface of the mitt tiortioii 35 to the tiistei end 2G of the heckhead 14, As hest shotifn in Pig. 4, the The hztckheati 14 eiso inoiuiíee e tieiige 415 that. exttinds redieiiy iiivfartiiy tfrotn en' outside tittnge 45 is positioned above the exhaust iiorts 3G., The tienge 45 pifovides a distai surface titzitengages a. ptoxiintti end ofthe housing 12, es 'hest shown in Fig, 22. 1313531 :Tine fiistrifbutor 48, is hest shovsfn in Figs, 7-1t). 'the distrihtittii* 48 ineiudes e inain bodyportion 48:e and en tixiieust etern 481) that is eontigtireti to extend into the tirive eheitiher 18 of the111,11) haninter 111. 'the ciistrihtitor 43 eiso ineindes n centret openiiig St) that extends axiaiiy 'throughthe distrihutor 48, as shotvn in Figt 3 and otieiis up to fonneii interior 51 of the niain body portion4%. As such, the tt-taritrzti tipeniiig 5G provides for tiuio communication between the piroxiniei ennerict the tiistai end of tiie distrihutoi* 48. [iiíišéii in en exiai direction. ”the epertute 512 is rodieiiy iiffset front the centret opening 511, as showfri in Fig.
    The tiistrihutoi 48 ftirther ineiudes en apertttre 525 that exteiuis throtigh the tiistriiiutor 43 ti. 'ifhe epeituie 52 protfides for tittioi etinnnutiieatioiie through the distrihutor 43, as titrtiifn' áiseusseiiheioiw. Frefereiaiif, the tiietrihnttir ßitšineiucies e piureiitiy' of zipertnres 52, and niore pteferehiy thetiisticihutoi" 43 inointies six atieitures 52 that :ite eireuitiferentieiiy niiti equai Ey speeeci apart, as shownin Fig. 1G.itifišši exiintist gaiierr-jy' 54 is eontigureti tvith e :tirst opeiiiiig 5112:, en eniarged opening 54h atijeeent the The distrihuttir 48 aiso includes an. exheust geiiery 54, ns shoe/n in Figs. 7 anti 9. The opening 5421 että en iniet opening 54o acijoeent the tiiet opening 54e et en end of the iirst tipening54:: ottposite the eniarged opening 5411 'the tirst opening 54:21 ie in communication :with the interiorši. of the distrihtttoi* 48 anti. the eniargeti opening 54h. 'itie exiiaust gaiiery 54 ziiso pirovides for titiitiootntnniiioetioii iietifvfeen the centret opening St) and the exhoust pott 31) of the haekheud, as shotvii iniÉiig., 3.ititiššfl as thitiiei* tieseriheri heiow. Gianti 5721 reoeives e seai 94 (iiig. 19) and is positionen ehoiit en "Pite distributor 48 prefernhiy ineittties giancis 57n~c1 that eaeh reeeives o. restieetitfti seei, go-azozisfsne; Ut iii 2G interior »ifall snrinee oiïiie interior Si and. heiow or tiisttti to the intet opening Sfiio wiiiie the giand57h reoeives a seai 92 (Fig. 19) and is positioned eiiont the interior tveii surface of the iiiterior 51and above or iaroxiniei to the iniet opening Site. Tiie gieiitis šïn anti 57h anti their respective seaissettiitigiy erigege en ontei' sniffaoe of the siitiing tfeive 626 'the giond S7e is positionen aiong en onterttfaii stirihee of the distrihnottti' 48 einii ehove tite eniargeti opening 54%) Witiie the gianti 576 ispositioneci oiong the onter vveii stirfaoe oftíiie iiistrihiitor 48 and positionen “neiow the oniargetiopening 51th. Furthermore, the distrihntoi* 43 iiieincies n ginnd 56 nhotit a ciistai end oi' the interior' Si tiiiti e rniiiaiiy iiiworciiiy exteiitihig flange S9 athont e pioxiinai end of the niziin iiody portion 48eabove the íirst tipenings 5421. [iitišfïi 'iffhe siiciiitg tfoive 62, is hest shown in iiigs. 2 and 114.4. The siiciing tfeive (S2 isessenihieti it/ithiri the iritetioi' 5 i of the distrihutor 43, es hest shtivvn in Pig. 2. “ii/'hen 'ihiiyessemhied ifvithin tiie BHD itannner it), the siiiiing *voit/ie 62 is shdahie aiong the interior Si iifthetiistrihittor 48 etui iinovehie hetvfeeii a oiosed position and en open iiositioii, es thrthet* disenssefibelowiiihšåi (iiig. ii) and en fipeiiing 68 nhont e. niidseetioit of the siitiing 'veive 62. The opening 68 exterifis The siiiiing valve 62 inoindes e oioseci proxinini tatto 64 (Pig. iQ), nn open ciistei end 66 rntiiaiiy tiirottgh the *it/oil of the siitiing ifnive 62, ns best siiotfløn in Figs. ii and 14. The opeiiiitg 68is oontigttreti os :in eiongateo opening nhotit a mid. portion of the siiding vnive 62. Preifereifiiy, thesiiciing tfaiiøe 62 including n piuraiitif of openings 68 titnt ere oirouniferentiaiiy speeeci ntsnrt aboutthe mid portion of the nieiii hody tiortiori 62h. The position of the tappning 68 aiong the siidingvztive 62 is oontfignred such that When the siiding voive 622 is inoved to 'tiie open position, theopening 68 provides tor iitniti ooin1nnni_oatiori ihetttfeeti the iiiterior Si of the distrihiitoi' 48 anti theexheust gniieiy 51k iioivever, vaheii the siiciing vaive 62 moves to the oiosefi position, tiie opeiiiiig68 is spett-ed apart froin the exhanst gaiieiy 54 snoh titet the hottoni portion of the siiding *voit/e 62seaiiiigiy engages the senis 92 aint 94 to soei off the intet tipettiiig S40. ihiššifši (šfåii. “The upper portion 6221 is geiteifaiiy oohfigureti ns e iinstroeoiiiooi portion oi' ns a ohenifered in geriernii, the siiáing vaive 62 inointies en tippet portion 6221 and n rnain body portion piroxinini end.. 'ihe rnnin body piortioii 6233 is generally ooiifignreti as n tnbtiiei* portion extentiingciisteiiy' íioni the 'upper portion 62e. The siitiiiig vaive 62 is ooniignifed *faith a iioiiow' iiiterittr 6224:and a through hole 76 that extentis through e proxiinei end of the nioin hotiy portion 6216. "Firethrough iioie 70 is ooniigoreti to reoeiife o oovøei 76 (LFig. 15). The dotvei 76 serves as a bypass ping or o ohoite ping tor the siiciing voive 62, as kiiown in the att. Tito siiciiiig tfahfe 62 enn tipticiiiaiijy he 9goc-zeznzfiws _; lt) h,*Jr 2G confi gurecl tvltlr e. gland '74 reeessed alueet en enter surface ef the hustrecenleal rrppezr pertien 62e_The upper rrortierr. 6221 else includes a rlistel surface 72 »that extenás radlelly lnwerrily" te the exteriorvtfztll of the analt: body pertien 62th. thheül The assernlhly ef tlre sllclšrng vfalve 62 vvlthín the BHD hannner lll, ewlng te the epenings68 ef tlre slhilng valve 62 being in etrrnnrurrieetlen *faith the exheust trotts 3G, adxfantegeeuslyenstrres that the lnterier 62:: is strhstnntiatljv at exharrst pressure er the pressure external to DHDhnrnnrer l (l, uflriclr is signltlenntly less (amg, at nheut atrnesplrerie pressure nr about. 'Dáil pet.) 'thenthe supply presstare (eg, aheut 308-350 pel. or about lší) to 459 pearl.) being feel te the lfšlålll)harnmer lt *Jie the strpply inlet 26. Tlrrts, heeettse the pressure Within the Stirling valve 62 isnreintteineà at' lower prfessures, relettve to the sujpply pressure of nrerhirrg tflulcl tfolunres feá te theBHD harnrner lfi, the tuhular slirlšng cheek *valve assembly' 4:3 edvantegeeusly errsures tlret thesrrprrly pressure itírrretiens as a lvias pressrtre to turge the tuhular slitlirrg check valve essernhlgv' 46 tothe epen pesitíen. ššlhšll The hiasirrg member 108 is assernhleti te the ttthular sliclirrg cheek tfeltfe assenrhlgf 46 seas te he positlened between tlre slirthrg telve 52 and the distríhuter 48, as hest shevvn in Pig. Ii. "lhehlnsirrg rnernher lülš een be any lätaslng rnernher ltnevv irr the art and; preleffetlly e, eell sprirrg hlasirrgrnernher 193, A prexlnral end et" the hínslrrg rnenther' 198 engeges the rlistel end 72 et' the slidirrgvalve 62 nfhlle the dístel end eftht: hiasirtg rnenrher lOS engnges the tlertge 59 exterrellng redíallylnweråly frem the upper portion ef the distrihutefs lrrterierö l. llllllšït the Stirling valve 62 srrttlcíerrt te retelrr an elevatecl pressure ef et least 35 pel. ttfitlrirr the lDI-lÅEJ Pretlerahljy, the lriasirtg rnernher lGS is eentlgtrred te provide en everell resteršng fertte to lrannner lt). This car: he eecernplislred vtfith e håesing rnemher ltlåš the prevfides n. net restering tårreein lhs. that is ehnut Qütš/ê to lZÉW/šr et” the numerleal tfalve ef the DHD hnrnnrerls internal tliarnetersqunred. The terrn “net resterirrg feree” rneans the etferatl three applied te the Stirling *valve (52 hytlre blessing nrernlrer' l08 rninus any eeunterferees heting en the sllcling tvehfe (iii, eueh as tlrletienalforces generated hy Seals en the sllrlinrg *valtfe 62. Centïgrirrlrrg the hiaslng nremher ltlåš te lrnvfe e :retrestoríng feree of alrertt QÛÜ/ír te lZíšlš/rr ef the rrurnerieel valve, et" the BHD lrernrnerä internaldiameter squered arlvautageensly allows the hlasing nrernher lílíš te rneve the slítlhrg vfalve tu theeleseeï pnsitlen (fšF-ig. 2) vvhen e tlew ef surrpljy' pressure red threuglr the euprlly irrlet 25 isdiseentinueå, thezfehjy' seelíng ett the supply inlet 26, valrile the internal pressure vvltlrlsr the Dlflll) hennner- lG les rneintaínetí at eleveted pressures eg” et er eheve 35 pel, Elevatetl pressures ere l t)çtiflezozsrnxvs; 1G ppm).tja rnaintaíned within the SEED harnnrer ii) in combination with a seai 17 and a solitt-core piston 16, asfurther described. íveíottf.fišíšišššfi biesing rnenfrber H38 over a range of DHB haxnrrter EG borr: sízesr Thus, for exanrpie, 'Fzrbšre i iištxstrates tfne preferred :net restoring force rærges for the 'rfaštše Lä.. ' \\ ínternaí Diarríeter' DHÜ Han1n1er(in.ehešsf) Net rišestréring Force Range iilbs.) fiorovided by í tíšærsšxrrï rnernber* to reïšríšrrgggr rfttïtteff 4.5 1 9.326,73 _ et-rrzs4 _ t :fix-satte5 zrsætrzse» t t 3144511s ” t ' 57,r«t~eo§o totššàg rrressurâzes the irrterrraí areas of the DHD hemmet 1G to eíevated presenter, above 35 psi., anti Iltrrring operatiex: of the Det-H) hemmet* 1G, ethe flow of xtforking tïtrid or supply pressure typioefiy oïaerzrtes the Ilïššíï) hartrmer ii) at tufessures frenr about E56 pei, to 459 pnsj- 'Ifhusr »xfith a'biasing nrenrïaez* 198 íraving a sufficientt net restorirrg three, the biasirrg mentber' E08 aïïows *the DHDhanrnrer lt) to pertiaíiy ret-ein the eïexfattëd pressrtres twithin the DÉHD hamnrerš irrternal areas, Sunet:as the círšve eïrarnber' 18 at oievatetí pressures. Freierabiyf, the interna! areas ofthe BHD hamtner 1Gare rnairrtainetå at a pressure of at rieast 35 pssi, by the proper baiancing of the net restoring force ofthe hiasíng rrrtarrtbetf 198 on the säiditrg valve 62. flššišåššfi 'Åfíre internaí areas otïhe Åišíšiífš 'hanrrner ti), surth as the tiríve rtharrfoer 13, are seaïed oft;and gæreferabšy Erenrretittaíåy' seaied, osxfing to the orömbinatiolr oftiire soíid-eore pister; to' anti the Seal17, vfhen 'the DHÉÅ) íxaïnmer íÜ is in fizfotvdovørt position. 'Éfhe BHD harnrner 1G is sealed off and:moved to the dropfliovvn position Ltpon the. fiovv* :rf suppïy pressure feed to the Dšïï) hanrnrer ti being díscorrtinued ie., stopped or reduced to a norvaotruating .ieveL strat: :ts 35 prsri, 25iišrustrates the Iëï-.ÉD hormoner H3 in the dropwšofaafn oositâon. Rfíairrtzritaiitg the internai areas twftheSHB hemmet 1G at eïexfated pressures adxfzrrttageerrsiy' prevents the ingress of arr/äter anti debris intothe DHD harnrnerš interior, xflfhioír can rregatíxfeíjaf impact the overall operation and startup of theDHD kanoner 1G ztfter an šnternrittent stop. Tjypieaïlyfr weii bor-es can generate a evvater ooïuzrtr: toheigírts ofup to 8G feet rötW-vater, or atvorït 35 p.s,i. "E"}'111s, :rtaixrtaining the internal areas ofa TÜrí--IDštarmner' ti) at or efootfe 35 psri. tqfion en intermítted stop advantageousiy prevents the ingress of twitter and tiebris inte the BHD harnrnet' 10 våren situated at a well ttore hottorn, 11 ut it) Eíitttiíii The seai i is hest shotvn in, Figs. 244%. 'the seai i is housed *within a glatta i7a otßtiieiiousiiig 12 located ahoiit a tiistai end of the housing 12 and aiioife the threads 12%). The seai i ispreterabty' gaositioneti so as to he engageri ovvfitii a eyiincirieai hearing 19 located about the ciistai endofthti housing 12 and coufigttreci to reeeiiøe a tiistai että of the piston iót The eyiinririeai iiearing 19is seated on a ohuek assenihitf Qi that tiueacietiiy engages the itousing 12 find retains »the ttriii hit 15.Retferriiig to iiig. 25, vahen the DHD hamrner 10 is in the drop down position, the soiitfiheore pi ston16 engages the seai Vi, therehy prevehting the ingress of external iiuid anti dehris into the internal:iifezis otthe ïši-ifi) hanufner 10. íütiofl 11A, 19A and 22A iiiustrvate an alternative siicíing vuive 62' etnhtiditrient that issirniiar to the siiciiitg 'vaive 623 exofapt for the iitoiusion of a reduced diariieter lower body portion61th”. "firat is, the ntiain body poition o2h' inteiudes an upper body portion 6321' and the lower bodyportion ofšhï The iowver horiy portion oïih' has an tiveraii diameter that is sinaiier titen the irpperbody portion éfšaï 'the main body portion. íiZh' aiso ineiuiies a steppeci iiange having a distaiiyÜaeiiig surface 63 o' that torirts the transition iietttfeeri the uttper hotiy portion ñša* and the iower hodyportion 63112 The steppeci fiange is positioneri iiistai to the opfsnirrgs 682 The tiistaiiy faeing surfaceófio' attifantageoiusiy provities for a distaiiy faeittg surface area ie, a hias area oššefl Which isexposed to exhatist pressure (Whieh is iess the supply pressure) to ensure that the siitiing vaive 62'iuoves tiistaiiy to 'the open position iipoit exposure to supply pressure (see also Fig, 221%). ititttšåš; the Difif) iianinieffs internai tiiainetei* stgtxaredt 'Fable 12, iiiustraites the preterrett oistaiiy timing 'ttfhe ciistaiiy faoirng surface aiea 6312' is preterahiy ahout 2~it% of the ituinerieai vaive of surface area 6312' otfer a iuitge ofDHi) fiantinei' 'oore sizes, Taiiie 2.i i iiriteniai iftianteter BHD Haninietf (ïinehes) Išistaiiy Facingifšurfaee Area Rainge (infišU " 4.5 iiii " i ostaflose i3 tltëhüßóiiii i i i 4 i i i i i egot-erat si iiii i osar-trioe 012444s teater; W iíššióiii 'fire coinhiiiatioii ofthe distaiijy' taeing surfaee area oše' of the siitiiitg tfalve 6.72' and thetiet restoring finne of the hiasing nteinherr 'E98 advaiitageousijil' eiiows the DMI) itamrner it) tio retain eietfateci gates-states tvitflhin its internai areas at or above 35 p.s.i. 'ugoon an irrterntitteiit stop of the BHD teozozzxavs; St) hammer 1G, This is aeeontpiisheti hy the riropei' hziianciiig ef the riet restoiiitg force of the hi risingmemher 168 on the siitiing valve 62' and tite hias area tšše' of the siiding valve 62' in eenihiiiationwith the expendehie intet passagetvey' 41 of 'the iieekheed 14. ttitïrïüt The screen 78 is eontiguired, as hest shovvn in Pig. 16, and is iireferahiy oonfiguied as n perforated itteferriiig to Figsi 3, 9 and 16, the HDi-ii) hatmmer 10 een optienaiiy ineiude a sereen 78. plate screen 'the sereeii 78 is preferehiy erintiguired es a spiit ring screen for eircrirnserihiitg thedistrihtitor 48 shout an oiiitiet Sdid et” the exhaust gaiiery S4. As hest shown in Fig. 35, the screen 78 is sized and eenfigured to eireuntiserihe the exhatist gaiieiïs eriïarged opening 5419. 'ffhe screen '78arivantngeoiisijvf provides a nieeiis te sereen out sind preiaerit dehris ffrorn entering the Di-iï) haninierïsiiiterior through the exhatist ports 3G rit°ttie hackhead 14. ifihïii The DHL iianiniei' iii aiso iiiehtdes e heíieviiie ttfnsher 8G for faeiiitating the ineuiiting ofthe tuhtttai' siiding cheek valve essernhiy 46 tvithin the housing 12 and the haektieed 14. Theheiieviiie vvasher 8G is eeiifigttred, as hest siiowii in Ãiiigs. 2, i and iii. The itieiietfiiie Washei' St)includes a eentrai tiirougii hole 82 and giands 86 aiid 88. The giend 88 is eonfigured shout a sttrfaeeof the eerrtrrii tiirotigh hole 82 for reeeivirig a seai 162 (Pig, itä), The iieiieviiie wnshei' St) eisoinoiuities a disteiiy feeing tiange 84 ahout a rnid portion aiong its axisi length, as shovifn in Fig. 18.The gtand 85 is positiciiied iheiow the flange 84 and contigtired to receive e seai 184 (iiig. 19). Asshown in Figsi 19 and 22, the iieiieviiie n/asher 8G is assenthied within the itousing 12 stieh tiiat thefterige 84 engeges a iiroximai end of en inner iirittsing tlšc er siidiiig cylinder. tíitšïïši 12, The structiure, operation and assernhiy' ef the iniier housing Tt2e is iinewn in the art and titerefore The iniier iiensirig tIZc is rireferahiy e separate eornpeiient ironi the rest iii* the ttottsing e ctetsiied description of the inner housing ilïe is not necessary tor etinipiete understanding of thepresent invention. iiovifever, hest shotvn in ÄFig. 23, the inner iiottsing iZe is generaiiy erintigizreties a cyiinriricai housing iiavirig a piniraiity of spaoed apart tiirough hoies 13 ahout the ivnii of theiiinei' housing ilïe. 'the piuraiity ef through heies 13 are erraiiged, as shown in Pig. 233 with e firstrow Ba of tiireugti iioies 13 eircuinfereritieiiy and generaiiiy' evfeiiiy' speeed apart ahout a prexiineierid of the inner iiousiitg 121; and a. seeerid row i3h ef through hoies 13 eirctintfeirentiaiiy andgeneraiiy exfeniy spzirzeri apart ahont a riistsi end ef the intier htiusiiig ifie, 'The position of tiiethrougii hoies 13 of the tiifst row Ba are cirettniftfireiitgiaiiy ofiset ironi the position-i of the throughiieies 13 of tiie second row Bh. The inner iiotising ifåe aise includes a third row i3e ef through heies 13 eirourriferentieiiy' and generaiiy eveiiijif stiaeed apart and located closer to tiie riistei end of giiiizesssssfs; 2G tite inner itonsing 12e than the hoies ot' the second rerw 12th. The third :rovv 13c ofthrtrttgh hoies 13are aiso oirrontnferentiaiiy otfset ttotrr the second row tfšh of through hoies 13. getost that eaeh connect a through 1io1e 13 of the tirst rotv 13a to a. through hoie 13 of the second rovv" 131m A pittratity of sphites 15a are torrneti about the enter surface of the inner itonsing 12o Eaoit sphne 15 provides tïtrid oomrnnttieatitin for the tion: of ñtrid hettveeit the through hoies 13 ofthe tirst and second rows 13:e, 131). A piuraiity of sp1ines 1519 are aiso tiarnreti ahottt the ooitersurfaoe of the ittner irousing 12o that are each in fiuid centnrtrnieation tvith the tirrottgh iioltes Hofthe third rotv Each spiine ÜÉSh aiiotvs for tittid to fiovv around the exterior* of the inner trousirig120. As such, the spiines 15h aiitrw for the tiotv of ttforkiitg thiitt votnittes to tiow titoin the driveoharnher 18 thougit the through itoies 13 of either the tirst, second or third row 13a~e to a reservoírohamhei' 18a (Fig, 2). Working tïnid voinines then flow past the distai end ot' the niston 16 inte and,out of the return ehanther' 181 (Pig. 2), Going to the eirenrnferentiai oftset of the throttgh 1to1es 13of the tirnt and third rottfs 13a, 13:: frorn the seeontt row 131), the pinitedity of spihtes 1521, 1510 areformed as heiioat sptities, 11111741 Sneih features otfthe through, hoies 13 and spiittes 15a,15h of the inner horrsing 12e fortnpart of the BHD harnrrier°s porting systern. "Pite porting thatures or" a DHÛ ttztntnter fitnetiort totnove vtforking .thtíd tfoiuines hettveett the 13111) hattttnerh drive e-irarnher 13, reservoir ohanther 18::and .rettnfn ehairther 181) to reoiprooatitIeIy rnove the 131113 harnrner°s piston 16., in rather words, thetiow of tvorking titrid voiurnes tion: the snvppiy intet 26, cheek *vaive assenthitf 46, drive oharnher 18,reserve-ir ohanther' 1811 and return tt-harnher 181), aii thnetiort to ttritfe the operation of the DHÜhartnrtter' 1.1). Fig. 24 iíirrstrates the assernhiy of the DEID hatntner 10 without itousittg 12, sitowvingthe porting .teatnrfes of the instant invention. 1121M51111-11) iiannirer 111, Fig. 19 also iihtstrates the inehtsitin of seais 90, 112, 94, 96, 98, 10th 1112 arid 194 Figs. 19412 hest show the tnhniar siidirig cheek trfalve assetnhh' 46 fniiy assemhied to the t/vithiri their restieethae giantis, as discussed above, The seais oan he any sea1readi1y hriewvn in theatt, such as an eíastornetio sea! in the thrrn of an Going seai or the iihe. 11111761 'fire hiasiitg tnenther 11311 hiases the siiditrg vaive 62 to the oiosed taositiort. in tire ahserteerita surapiy' of vøoirking tioid vointttes being fed titrottgh the supply intet 26, 11:e ciostzd position isiiïtttstrztteti in Figs. 19 artd 2.1. h: the eiosed position, the rnoxiitrai end of the siidirig vaive 62, ie.,the tzharrifered end of the upper ttortion 62a seaiingiy engages the stipp1yiit1et26. fieterettiy, theupper ttortioit, 62a of the siidirtg vahfe 62 seahfngiy' engages the first tfrustroeonieai waii section 34 of the haokheatt 14. Furthermore, a distai portion of the siídiitg tfahfe 612, heiottf the töpenings 68, 14toozozzssws 1 1/1. 1G 29 seaiingiy eiigagee ett. intet cpeiiing 54:: et” the exhatist gatiery 54, 'itie seaíiiig engegettient hetvifeeiithe ciistei end of the siitiiiig vfaive 52 aititi the exhaiist gaiieify Stå is feciiiteteá iiy seais 92 and 94% inthis position, the ttihuiai* siiciiiig check vaive asseinhiy 46 seiiis ett the siippiy' intet 26 and any iiititiciammunicaticii between. en exterici' ef the BHD hemmet* it and en iiitetiet ct' the BHD iiamniet* ti)tiiieugii the eitheust gïieits 3G. ititïïíti Lltiztnd 22. in the open position, the siiiiing tfaive ti is cffset front the distei end- ofttie sttppiy' intet The cpen iacsitieii ef the tuhuiar siitíing check tfatve assenihiy 46, is hest shevvn .in Figs. 226. Fitis, the cpenings 68 :inte in ccnttitiunieatieii With the exhzmst geiiery 54, as hest Shawn in iiig.22. iiitirtiietniere, as. shown in Fig. 2G, the supphv' intet is in cemnitinieatieii with the epeittires 52eittcnciiiig threugh the tiistrihutiär 48 to siiiipiji' wciiting ttuid *vcitintes to the "ijštïijiš haniihefs drivechamhei” 18, ititflät iiciisiiig 12. Tiie iiriii hit 15 can he fipetettitleiy' cciiiiizcted in e, ccnventitinei ntantier known in the art išefeittiiig back te Fig. 2, the citiii iiit 15 is cpeietiveiy' cennecteci tc a, iiistei end of the and therefcte a. cieteiieit description ef such a. cciinectieii is net necessei-jy' for a cempieteunderstanding cftiie piesent inventicn. išitivaeveig an exenttfiie ef 'how the cirili hit 15 can heeperativeiy ccimecteii. te the iiotieing ti is described .in US. Patent fttiipiicaçticn 'Ne ï2,f'tš2t,l 55, thedisctcsiire ef Which is herehy iiiceifperated hy reference iierein in its etitiitety. iiitïïïši The BHD hemmet ti), es itisctissed above has been ttescriiieci and shcivii as iiic-íuciing esciithcore pisten 16. ”that is, the sciitt-cere pistcii 16 iacits any thrcugh iioie er centret cheiiing thatextends ccinpieteitf thtcugii the pistcn, stitiv-h .iii the axiai direciticii. :ii-ietvei/et, ithe siidiiig cheekvalve essemhiy 46 et" the Ditt) iianiniei' ti) can alteiiiizttiiveiy the nseti vvith titiy cimifeiitititiei pístenhaving a. central thrcngii hele tiiat exteiitis exiztiitf tiircugii the pistcn te aticw eithaust through 'the»tvisten and tiriiå hit. thtiåišhi enihedittteiits described eheve ivithietit depaitiiig fircni the hread iiiveiíitive concept therecf. it is it ttfiii e aptireciated hy those shiiied in the ett tiiat ciíiatiges ccuitt hc niade te thetinderstcett, titerethre, that this inventicn is net iimited te the particular einhotiirneiits discicseti, tiut it is intended te cover moditicaticiíis tvitiiiii the spirit mid sccpe ef the inresent .iiiveiitícti es tietiheti hy the eppendeti chtinis, g-.fiezczssfætfsi
    权利要求:
    Claims (25)
    [1] 1. CÄLAÃR/ÃÉSï/wr: claim: Å døwaï-tïïeåïøïe driií haimnm' comprising:a houvsing;a backheaå ai a. proxinïaí and of the høusirxg, the 'nackheacï incšuàiïig:a dístaï and,a lhrcadaæd :ra-ade proxiinai and,a suzppíy íníæat for receixfing a suppfiyf of mmkixxg íhxid 'w an inïeriør of the “ítfackhead,anfían exhaust part for conxnxunicatíng betvvæcn ighfi inïsrifir of the baakhaad anå anexterior øfthe 'baszïäïasafíg and21 tubxïšaï' sïiciing *aaíxffi assembiy' within »tha høusíxlg proximeïíf: io the backheafš, tfihssíiäing check *Jalva asssrrïbly' incimíing:a distributør haxfing:a ccsatraï avpfinšng,an aperiuïc extcnaíing tflhrøugï: the disiributør and offsct ikon: :E16 cenirašopening; for aiïovaing the passage oívaorífiing *fåuid ïhrougíï the cíistršhutør, andan exíïaust gaïícry før cnnïnaunícating betweefi the cenïral spaning and 'íheexhaiïst part, anda síidíng vaiflfe siifšabía aíung the csnífifaš qgvening and ïnzwabie beixveeï: a closedpøsiïioi: and an open gsøsšíißn, th: sïicïiing vaïva irmfiïucíirlg:àßioseaí prnximal and,an spar: distal and, andan opening about a nïšdsccíiøn of the síšcïixïg *vaívø, anda biasing mcnizïvex' biasing the síiciizïg “vahxgvvherein, in ïhe cíosøaí pøsiiiiøn, the proximaí and of the sâiding valve seaíiiagíy' engages thasuppíy' Enkät and a dístai and of the sšidiaag *valve seaïingâgv' engages an inšet spaning of the exšxaustgaííezïf, andwhareirx, in iíw apan posítioxfa, the sïiaíing xfaïve is øffseí from 'aha supply iníet, the, øpeningsøíïhe sšicling *vaive ars in cornmæinicatiøn vviïh the exhaust gallery, and the supply' inísi is in cßrnrnunicaíiør: 'with the aperíurc extenfišxag through ïhe distriåfixxíer. goøzozsssw-s ; The atevøh~titufe~hçsíee driit hzttntner ef etaím t, ftuthet* eemprisirtg: dfiti hä: täperativeiy etmneeteai to a distai end efthe heusing; ene.a. reeipreeatiztg setid-eere pister: tvíthit: the hetusing hetxveen the síitting cheek vattfe ztseetnhiy* and the driií hit. 'Fhe devøn-the-hete driít hamtner ef eiaim 1, ftsrther eetnprisitxg en expattcíatfite åtalet passagewaytaettveetï the haekheatt and the síiding *Jaive for eexnïnunieatitag hetxveen the supply åtalet and. the :Aperture extendhïg thtcfugh ethte distrihuter. The devsfn-tïte-hete dïiít hanïnter efelašnt få, vøfherein the expanetatfite intet passegeway expands es the stiding veive stidšzs distaity' reiative to the haehheaai. 'the tïewn-tšte-heïe tíriii haïntner ef eíaitn L., wherein the stidixïg vatt/e has a ehatnfereti prexixnai enat» Time ttexf-zn-theåïoïe dritl hatiemer ef eiaim 5, 'wherein the interier of the baekhead includes :t.ttueíreeenieat »vatt attj aeent the ettppíy intet te engage 'the ettaxnfereti proximat että of the síicíitïg *Jah/e. 'tfhe devatt-ttfieflheíe fhiti ttatnmet* of eíaim 6,, »vheteitï the interier ef the haeídïeaå futther includes a tuhtztat* twašti edjacent to a (listat encš of the frustreeertittaí »vall 'the deWh-ttïe-íïeïe (híii ttatnmer of etaim 7, ttfhetfein en ítxtet :Jassagexvafyf in eemmttnítïfttíetä_between the supply iniet anti thte aqafetïíure extendíng through the tiistritwuter is formed hetxveen »theettrfaees ef ehamfereai ptexitnaí end of the síitting vatve and the frustreeexeieatï vvfaít and 'the tuttfitzlar wvaït of the ittteršer ef the haekheatt, The ttoxfvn~the~heïe drih hamtnet* ef eiaitn 8, wftítfarešn intet leassagevvay Åhas en ahnuiar gap ef aheut (H32 te atveut GÜS ínehes. The ttotføn-ttteflheie driíí hemmet att' etaiin S, mfheafein the prexintat ená of the stiding vahfe itaehtdee a Seal recessed within the ehernferect gtmxixnat end. çøftzttzßsse-s; ii. The cienfnehe-Äheie ctriii itannnet* of eiaiin t, xt/heteiit the distrihuter fttrtitet' inetutíes e tirst Seatpteximnti te the intet opening ofthe exhattst gallery and n second sent àistai te the iniet opening efthe exhnnst gniiery, 'the first and seeendi seeis seaitngty' engaging an enter surface ef the siiåing flfatve. 12. 'the cíewtiflttteheie tititi hamntei' et' eiaim 1, »vhereitt the disttihtttnzf fnittier includes a screen ahent an eutiet end ef the exheust gailtfixty. ifiš. Tiïte ttotftfnfltihewhele driii hnntniet" of eiaint I, 'wherein the exhenst pott extends tetwerd the prexíntal end ef títe heusing anti includes an entlet end prexitnétte to the itnusing. 14:, The denfn-tite-iittsie driií itannner ef elaitn t, tflhetein the disttíihnter further includes en exhanst Stein extendittg inte n drive ehetnthei' of the hatntner. 15, 'Phe fievtfn-tltteàtitiie driii ttanintet ef eiainï i, further eoinprisnítg et tvashet enitneeted te the hettshtg to secure the disttihtttei' vfititin the interinr ef the haektteaiti, 't6, The devan-titehiteie dztiii itaintner et" eiaint i, ttfherešn the siiding valve ineindes a piuiniítff efnpenings, the tiistrihtttet inteindes a pittraiity ef apettntes extentiing through the distribution and the iaaeithentí includes a pittrzttity of exhettst pnrts, 17. 'the fievvrt-theeiteie fiitiii itznnntei' of eiaitn i, vaiterein the baekhead includes:a tapeteci inidseetiei: interior in eennnttnieatien with the sttppty iniet; anti a tunnlar tiistei end fet* tett-eivirtg the distrihttter, itä. The ctenfit-tite-itoie (hiii hemmet of e1a.in'1 17, wvherein the tapered initisectintt tnpers in tlhe prnïtiinai ciireetien. 19, The tinvvtivtite» heie ciriii itnmntei' ef eiaini 17, witerein the tapet'ed :niciseetien ittteittttes:a tirst ftustreeenieat stietittti actj aeettt the supply intet;e tirst tnbniar setttieit arïj aeent the tirst frnstroceiticai section;a second tïustrocortieai section adjaeeitt the first tnhuiati' section;a seennd tnbuiar section atlj aeent the second ttusttntzenieat section; and a third íinsttoeertieafi seetinnt adj aeent the see-end tuianint section. 18goezeziaasgvfi; 20. A tiotvnßtiiohoie titiii iiatntnei* eotnpiising;a hotteing;a iiaekitead at a proxitnai end of the honsiitg, the haokheati, ineiniiing:a stippiy intet for reeeiving e. supply' of vvorking tiniii. to an, interior of the haekhead,an exheost giiozft for eorninuiiieeting hettveei: the interior of the haekheao and anexterior of tite baekheati,a tnivniei' distai end, anda tapeten inidseetion interior in eotnrnutiieatioti vøith the sujgipiy inte-t that itioâitfies:a frnstiroeoiiieai section atiiaoeitt the snppijtf intet, anda tnhiiiai' stfetion adj attent the frnstrooonieai section; anda ttihniar eiitiing cheek vaive assenliiiy tflzithin the hottsing proxirnate to the haekheati, »thesiitiirig eheitit xfahfe assetnhiy irieiitiiing:a. distribute: having:a central opening,en apeitittre extending throngii the tíistriiititor in en axini direction and otftitettftoni the eentiai opening for aiiowing the nessage ofvvorking flnid through theáisttibntof, andan exhatist gaiiery for eoniniunitïating between the eeittrai opening anti thetfxhattst port, anda eiiaiing valve siidahle along the central opening and tnovahie between a itiosedposition and an open position, the siídirig vaive ineintiiiig:a. oiosed ptoxiinai end.,an open :tiotal end, aintan openirig ahoiit a niidseetioit of the siiding valve, anda. hiasiitg tnetnher ioiasiiig the siitiing valve to the oiosed position.,wvhereiii, in tiie ciosed positíoii, 'tiie proximai end of the siiding tfaive seeiingiy engagee theenppiy iniet and a distai end of the siiditig *Jah/e seaiingiy engeges an iniet openiiig ot" the exhnnstgaiiery, andnfheicein, in the operi position, the siitiing vatve is otïset tiorn the snppiy iiíiiet, the openingsof the siiding ifaitfe are in eonainnnieetioii with the exhanst gallery, and the supply intet is in eoininnnieeti on With the aperttire extenchiig through the distrihntor. 19ijeozozatsafa; 21. A aifavørxfthevhuše drili hummer eoanpfísing:a Efaousing;a haehheaci at. e, prexhnaï end øfíhe heusing, the hackhend ineiudixmg a sfiippíy inïeï forreeeivhfig a supply' hf werking fiuid in en interior nífihe hackheaaï;a íuhaxíax* shchng cheek xfaíve assexnitfíy vvithin the housing prexhnate to 'the haekhead, thesíiding ßheek *valve assenïhšy including:e áisirihutør, anda shdihg valve shdahíe alexag the distrihxltur, the sïiding valve including:a cíosed proxhnaí end,en open distans end,en opening about a :hiàseetšaan ef the shdihg *aniveg antian inxvnrdï.y extending fšange having a. distaåíy' faeing surihee area, anda biasizag member hiasíiïg the síidilag vaíve tu seaihxgiy engage the closed proximal end to*ihe sllïewpïjy' inlet;a solid-score pisten rehipreeaííy ïnounfzefí »within the hnnsizag; ann a seui pruxhnate a distei erad of :Éhe housing betwveeh the suíidæore pisten and the Eaexising. 22., The åuwvihtíïfæheïe driíi hzunlner hf cíaiïn 21, míherein the housing has an ihternai diameíer (ED),wwfhezreirs the disíaíijv' íheihg surface area is about Zflšff/e of the ÃDZ, and wvhereia: the hiasing rheznher hes a restering feree in Ehs. hf aïæflut 9G~125°A> efíhe nuïnericaš valve ufàfthe ÃDÉ. 23. 'The dexvhflcheåleíe drih harunïei* ef cíainï 21, further eeingvi'isiilg a drivs: ehahfneï positiohedhetvfeeiix the haekhead and "the sehflheore pistun, Whereha the cíosed pruxírhaí enn ef the shding*Jaflive seehngíy engages the sïappïy* iniet, and the suiifíeefare pæistun seahngíy' eragages ffhfi: Seal proximate the distaí end efthe helisizlg. 134. A clovvixafihe-heie drílí haihníahz' eønïprising:a hiousizlg;a hnekhead at a prexilnasi end of íhe heusiiäg, the baeklheaaí íheeiudíiïg a supply' íniet forreeeiving a flow uf supply pressure to an interiur niïhe haehheaà;a tuhuiar shding eheek vaïve nssenfifily vfithilï ïhe høusing proxhnaïf: to the haekheaaí, thesliáing check xfaïve assemhiy ineiuding:e distríhutof, anda siiding valve shldaïfiie aïeïlg the distrihutozr, the siidhag xfaíflfe including: 2Gwøzozßsss-s; a closed gæroxirnai and,an epen (íistai enå, :måan øpening aheui a rniaiseetioh ef the sšiding fifaive,a. biasixxg member biasïxlg the seiídiïxg vahfe ie seaïiixgiy' engage the eíosed »prexínïaí end tothe supply iníeï;a seíieï-eere pister: recipreeaíiiy' rraeuníed *yxfithân the hexasizxg;e Seal fproxíxnaïe a ciistai end ef the heusing beàxxfeen the seiiídwzoxe pisten and the housing;anda diiïhfe ehamber positieheai beíxween the baeíišxeaoí and the seiidæzore pisten,vvherein the cíesed proxiinaï end of the sliding *valve seaíingiy* engages the supply' ixíiet, andthe seïicbeore pister: seafiingíy' engages the Seal prexiïnate the distaí end efthe høueihg te maintainan eíevatecí pressure xvšetíxiiz the drive ehanïhez" upon the aíiseonïihxxæxee ef the flexv of supply pTöSSULïfi . e . The dovvïx-theåxoïe åršiï haïrnïner ef eieiïn 24, vaherein the drive ehamber is :haintainecí at a pressure of at ïeaest 35 p.s.í. wezazsssyv-s;
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4050525A|1976-09-02|1977-09-27|Kennametal Inc.|Down-the-hole hammer|
    US4530408A|1983-03-28|1985-07-23|Toutant Roland J|Porting system for pneumatic impact hammer|
    US7198120B2|2003-03-25|2007-04-03|Bernard Lionel Gien|Down-the-hole drill assembly|
    US8302707B2|2009-01-28|2012-11-06|Center Rock Inc.|Down-the-hole drill reverse exhaust system|KR101399384B1|2013-01-31|2014-05-27|주식회사 성원중기계|Down the hole hammer device for using compression air|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US12/909,495|US8622152B2|2009-01-28|2010-10-21|Down-the-hole drill hammer having a sliding exhaust check valve|
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