• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Generating broadband light downhole for wellbore application. A laser source is configured to reside outside a wellbore and produce a seed light pulse at a first wavelength spectrum. A converter is configured to be received inside the wellbore, remote from the laser source. The converter receives the seed light pulse at the first wavelength spectrum through one or more fiber optic cables, and generates light at a second wavelength spectrum that has a broader range than the first wavelength spectrum.
    公开号:DK201500714A1
    申请号:DK201500714
    申请日:2015-11-11
    公开日:2015-11-30
    发明作者:Ian Bradford Mitchell；Mikko Jaaskelainen
    申请人:Halliburton Energy Services Inc；
    IPC主号:
    专利说明:

    TF.CJiMC/FL FIELD
    [0001] This fesolosbrfe mlOTfesffe fiber epik sysifemsMeci, lor efiars^le, in gOTiibofes,
    BACKGROUND
    ffiØø2] Fiber epik ©åbleg am øsfed fe tmøgmit Ifefefe fifeeNopfie eoriiraisøiea-bfias afiii ofeieal seesmg; Fer gaamgle>: ia ogtiøsi seasOTgj ligfe earr ispeseat wmes slgpa! typete such, as iiempemfe%:pesswres stram,: awiøratian., aed the hfee. fe some sppikmkmS;. spticaj sensing eaa fee usei' fe ® wdlfeemby eømmimieatOTg li gid. between a-murce and dfewnheie sensors er actnåfiæé;: (fer betfefe. ’Ibe fiber epik: .cables-, osn. be emfeedded m tbs :wdi1sord§. mfeifeg, ot rim dfewb into fise wellborg: ssife. I well: ieol (e,g;:> a ibggmg/teoi skhig in a. drill pipit stemg):.: M ligfet; passes rlpøugh. a fiber -optic. cable, some phøtens arfe; løst tfe; mstOTal fifeer adenpafipp ferøpgbfimpcifefetiois, tøpifefks., tesi .sestiwihglpfbcéss^, The rate af wfeifeii pfepieité arfe iesr fiepfeads'oa Ibetets ipfeiebbig feyfetfegeu; Ipgresfiep I and o t H'n 'άμΙ i a r t o mif η tb t f >d' mil >o tv c tet scmsup applksiieos>
    BRIEFDfiSCRiPTfON Or THE DRAWINGS
    [fMMBJ FIOL I ; ifiastraieS: as example syskm: ler prødeeifeg fefoacfbaed: fight fe a wellbore.
    jfiøfid] FiO. -2 dilastraOTS: an example system.: Ibr predaeisg broadband fight fes: a wdibøre.
    |00©I PIG. fe is a fifefifeharLef an .cxainpfe-^o^lte-pfedndftg broafifeand lighting vel i bore.
    i 0006]: I, ilte mfedke mmifeera and dfisigiOTtioafe OT the Fanøfes dmw&gb mcEeaie 'lites dcm-mts.
    .....................DETAILED: OfiSCRIFTlCIN...................................................................................................
    [ØØø7]Gbis diselesbre: relates tp generating: femafehand light dewhfek; ffe wellbore gppfieariQns, Ths broadband light cat*.'fest sellable; før séesifeg applicatlens M. retefefø, e,g:, døwehek,; locations. i Light in fhe 2-3 paa spmtrøa is settable for ehemical seodng
    applications, However, ft may sot 'he- tøslblé: i.o irammft snob bthadbaftd light across long disluntøv e,g:,y the depth: ©fa hvelllaore^ bebaMs ftiay degrMO
    the spectml pmili& tight at: a wavelength longer than IbOO nm. often. experiences less at a rate that matø tmdsPilhmg the light over long distances, &g,, of the order of several .kilometers, difficult. : Because the: tewthand Ugift emnml Bid traostøttei to downhole Ipsteions without sttenpaftoa, the light mag: he uu&tøtaMe for certain sensing agplitølomi at the downdioSe locaftonx, [Ofttø This disclosure deaeritø techniques to: create aed: hautsmft a light pulse to a dowtdiole location, and thee broaden the light pulse downhole Into a broader hand at the dqwwhole ioeatiøs. White desMhed ta the context of: a- wellbore;, techniques described here: eao.be applied, in. sop ehyhonuwnt In: which feadbaod light is applied at a location that is at: % diStatieO: &om tic: so wee ofihe light Itøftiaf a tøtøepglh that can; he ftaosmitied };øp.g iatte&dgfinn 'is. genoraied and transmitied lo a dovfnhOle location. At the reumfe iqotbpm fhe: light: is conneyrted to a broadband wftyeiengtb. By doing so* bipadband light ffithoui. ffitøfiuant aftennaiion can be made ayaflabk at the downhole: locations. Transmitting broadhasid light downhole can enable per:fenpmg: downhole operations, e.g.>: downhole spectrometry and oilier sensing: teehulboes, in:%¾¾¾ broadband light: at wntøsngthx outside thc: intrarsd range ate applied.
    jftOOvl Asdescribed bciow, fiber amg i yder S which consist of: a: rare earth ion doped optical: frftec: are pumped: at a specific waYelmtgih knowm to .excite the ions. A. seed light pnise is ftassodrihmngh: ibis: fiber at a photon, energy ithaf is equal to a: difference: between exoiteci; on d grbisml states of the dopant: rdtøtiftg iu stlmiyaied: omissioh: resold tig: in an aTppliilcaiion. of the seed light; pblse m afimt tmtøéfttøtøeetam· ’The nitenseaucl coherent seed light pulse is hmadened to a second 'wayeldhgihrspechTm th&t A: broader than the first wage length dpeetftma gsing highly aon-iincar optical. mateffals, e. ;gg photonic crysiål § per si Broadening: can he achieved, Ag.., by ffinwkfeh: Remse seattcrihg and: seif cross-phase modul etion that drives: the broad effing, [Shift] FIGS. I: sad. 2 illustratean example:system for pmdftcinghroadband: light |R. ft subterranean wellbore ft 02¾ As described, shore,, broaclhand: light can be suitable for sensing applietelons st remote, downheie foesiffins in a wellbore. FIGS. I and 2 Illustrate mi example laser source that is. disposed M e location (e.:g,, & sttrftø outside the wellbore) that is tomet®: åwm i hg loestion er locations at.wfiléfvihe broadband: light Is ttséd, Ag;., ibb tensing applicattem. TVaasnbttmg ibe bMatbate: hghf fifom. l.hc kam i o o of the iteersobree I© the mmole, down hole locahons witeno. fiitettation bor -tete s i wecpiabie level of atteuiAten) of the broadband light can te gxpeefitte, Aitemtefoely: or In . addition j Sueli ieanfomssioo nan rognire oosfoefateard fiber optic systems, Isser sources, otter eguigmeateor eomhiiuiiMis of them, As deseribte below;, thedase® source at Ilse surface, outede the wellbore 102 proteses a .seed light guise thai; is aørplified dawahøie sad then brøaåeBedi '»t«' ih«: 'broadfcrød. light that Is msed af the downhole, rerøøfc.løcaiiQm Dølag so eau oxmrceme tkeoignai attenuation Issues [0:0 If I FIGS, i: and 2 show air example location of the laser soarce and exagiple reaiofe, downhole sensing iouufon at w&fch. the; breateaM light Is used, lu ::sbme toaplernenfalions, iteitefr spurte: mm te disposed ihside> of the wellbore lfl2,: é:g., pari way between: tte. SurDes aasn the te:uWbole,xegiO!e: locations af which the htoadbaod. light, is nsébi FIG. 3 is; a fiiowetoft; of m example process; .30#- .for groineiag hteedianrl fight in the wellbore: .102 that meiudos a easing IS#, At 302, a seed sight petes is produced at a first wavelength, and, at 304*·teasrøMed downhole, As described below, the seed light pelse at He. first waeoieagfo speetruiir G coirvsited laic light at aweeottd wateleegfh spectrum that bag: a ’bmater rairge tern the first wavelength spechatm.
    [00::12:1 tellastg pete géneraiof; 108 a: the suf itee; cab: produce fee seed light pulse, -At .306,: fight at. d Miird wa velength: sgecirhhi is generalsd at a terråteaa autfece ttalsidé of the Welibore: 1Q2> id: some tepiemeniatlbns, the idste souroo 406 includes:: a; laser 302, e,g'., å 1064 wave! ength, 50 W: opufitetes wave laser, to :gehsfate: a: first light and: a laser 204,,¾ ,g,, a 2,0 gm and 30 W peale, .30 ,te pulse laser, to generate a: acoobcll light A ehrabiter 206, ,e,g.;! a dual ciaddigg cornMner, ieeeiyes and tentemss. the fitet: light ate the second..light lata the fight at the tfejtd'fit some teplepenfteotts, the first w&velcogfh spectrum Is sehstsatlalfo 800 wi or sdbstanfiaOy I pa to 1,:03 gm; eonfibuteS: wave, AiAongh deserlted as two lasers,, in: other instances, on teaser: or mere than, two lasers: can be ..........used to generate'the:fightet ;he fims wavelength;'spectrum:,...........................................................................................................
    [00:1.3] At 308:,: the. light: at the third wavelength spectrum Is transmitted downhole Into foe wellbore 102. :The pump light fa trtesnattod fiwm the laser: source 106 along a '.fiber 0' s A 1 Ci ' pfi > ooi epi , k v j>w ,,. < ,, 1 ,., „ teØTite liber 207:, Ik th® rite optib #1 110 da® be disposed m.a metal rute eg.® Fib·;·' m Meta! Tabe (ΒΙΜΤΐ };0δ1·4|:Μ 7:10.:. t&c mp4 light grilse at the iret wavelength: that is tfanpprttM dow:oftsie is ;.ampMed,. at the downhole location, using the light at the: tbiM wavelength sfToimm,. ,M described abøves iheseed light puis© has a photo® energy egnafto sidifferanes between eahited asd gtrnmi1 states ©fifes dopant is· the fiber optic cable 110 fesgliiag i®: s gtimBlated emission that Wiipllfies the seed: light pulse. 1®. :§om§ :iia|sle®ietrfathsrrs:.;: a downhole Wodute 1 ITus: deposed si' fteddw6hdfe':ioe.atioa. torecdve the seed light, pgfee at thy tel wavelength-apeotrem. 1¾ ateeye supereofiti®®®®! the peak: power of light leayiog the downhole nipdnle 112 cap: be oyer a ksiowan. Tbe laser source IQo c&a Uave sat^cierdipoveerfo achieve firis ®npereø®tlppur®: geaerailD®, Mrsotne ii:figIei®®oiaiionsv fhepesb power level pf the laser source pa® be bofiyee® 30: W aha' 1. 00 W:.
    | 0il S] The downhole niochde 112 mefudes a® apigfifier 114 and: & fiber optic cable 1 lb, which. exhibits strong absorption at the itird wavelength tfisyteb· bør example, the aaplifief 13 4 eanbo a TI®dåu®~dopsd fisher ^Amplifier frøFA| 208,: arid; Ée fiber optic tele 116 can he .a- ttnbum doped:: d®ai dad fiber.. When th® seed light pulse Is delivered to the anpih&er 114, stoteieå'smissiø^wilfiosour ioeivasinga power ofithe seed light pulse at the first wavelength spetmt® fiofir the first power to® second power that is greater fhaatlie first ] owhr.i Ip silthe ιριρίentehiafipps, 4f I. the Th.pl|urp~d oped fiber esc be: contained inside :tb® apipfififit' Ud- The fiberoptic cairsie 116: Can deliver light to a converter i ll pescrifeed beinwf ibr bipadteng:. 1® $££b(. l^iétde^MIrøhls· the fiber optic fable 116' need net he ..........speeMlyteped,..............................................................................................................................................................................................................
    pit] lb some inpdonwmwiona. ifie fBFW JOS' cap inelpde: a® isolator 2K) ;md Fiber fetgg: (Wafing :(FBG3 212 tp; enhance: pevteigspco by refleefiug. the light at the third wateepgifi: speetmm to make more ten one :pass: between: the; TDFA: 2¾ a®d| the laser' sowbe :106 .through, the, ate® fiber area- 234, The FB<u can %e a chirped F:B:i3; or aahnal PBC® which bah 4 osteter refieebou speck«®· relative to chirped FBCt The active fiber area 214 TSn iPolude a length, e;g.;,|10' ngi of W lOSfITS Thullute doped fiber. The:fiber: opte fable in the; active: fiber area 12:1.4 can: also include: air holes. The example system ifi FitiS, 1 Pod: :2 show: :a single, ampifieatte stage. Some Implementations ca® toten« rniiitipie amplification etages. For ekaeiptes M, output of a: first aniplifioKtion stage can be fed; as 1 seed: light Dulse ior a socood amplification Stage, Whistr lededes a eonrspoxKfefe laser sparse sufe epficai fiber, [01)1:7] M B 1-¾ fee range of tit© seed Itghiptdse at the first svieelsegfe s|>eel:rQm cart foe htosdeaed into fight at-a seormd wavefeagfej spectmm tkai }8.BFøa4^»i'afge''ifiap.iite-&St' wsvdeagfe. spectrum,: A cmvette 11 Is disposed: at fee downhole location to receive: fee afofeiifieii ilghp-e-g,; fee seed-light pulse is the 2: pat wfemiexrgtifi trem. fes arapMsr 114 aad to: eofoyorf life seed light pulse ted the: light ét fee aecbtrd Wavelsnfeåbg bfeadosfeg ike light hi ike Msi: wavelsogifi |M0 a supereofejMom. TA: efiaveri; fee iigkfi fee converter 1-17 tap Ipelpdfo: a phofefeé crystal fiber fiPfelfe 2>l-6:; fib aggfepAate: length ®x$ efed bisper Aon waycjeflgfe of sifesiantiafiy 2 pm. Bitfereof photonic efefisia!; fibers: egg foe IpfeleikeMed; fe convert the light based .cm fefifempfi gradients of; Ifedex of the fibers. lh some ilfeglenieotsfippS;, the seepacl wayeieogfe opeefikm. esa foe shifieå: fe a. fenrih wacejefogfe: spectrum,tkaf is-dlffismt irotn the second: by sniffing a frequency of the: l ight at the. second wavefeagth spedrarn to obtain: the desired, range, fie.:,. fee light at fee seaesfe: wavelength spectrum. The frequency eat be sfoifred up or. down- "ftedmfek. wavelength speefenm may, <>!' may: no; huve fee same range as ;bc second wamfengxb sneeWnn, bui wiii have a. broader range fear; the first waéelengfe speetfeiTr 100 I fij Wife the oMfighfetfefs described here. a: pulse peak poster ok fee order of I kW eao foe: provided fe: the converter 117 fe generate bmadfoåud .fight frayipg a pmyelfomgfe that, is between two mid fern .time#: greater than a wavelength: of fee seed light; pulse transmitted dpwhfooie from fee laser sotifee 106 at a: distance of rsp Id S ifra fifefo: fife laser sobre© 1::00.......Fur: example,. lot a .first wavelength; speefruffi:: of sppKfeifeaieiy. fe)(f hop fen second. wavelength spectrum of the: bmadfeaxfe light cap foe fe fife fi pm to % um range. The broadband light eotputfey the converter :1 1 7 is passed to aw output fiber optic cable fit 8' and deliveredfe: a target ISO,-mg., an eptieal- sensor disposed downhole at a foscati on .on the- easing 1¾. Back; scattered light from fee target 170 .« ffe transmitted to fee surface,: mg,* fe a spectronteterfisetfilfevml.fesfteceiyes and exalnates ike bank scattered.fight
    Ifellfi] -A efrofed of fee fifef wavelengthspedfuia can depend, ok a: dopant in 1¾ lifer optic cable: tlirottgkifefoich the fogfel is transmitfed: downhole in the reevda leeafiOn, TIfe wavelength of 100 fork is chosen for Thklimrn doped fiber. A diffeieforwaveleagfe ©an foe chosen: fop fiber optic: cables wife, differeit dopanfe e,g., llSfi am: får flernirim doped fiber.
    [0020] «a» be dpMév# .bjuliijg; - é · jsUjaf*· powct bf lege than. 3:00 rbWm at 1064 okt duts. to the weak abBo^bbftat this wayetoRgtb. This yafee con'espoadh to stored energy ()2 approximately $ fTbis wiitv depart ep^ceaftphbns of gahsCapttåify .1000 ρρτ.η, At 3ff| a 10¾ fiber will prøyibeMpi pr PPO W pealp potrøtnj a 3© ant pplsevttfavMed: Mtial seed light paise power is of suffieiggt magnitedw e.g,!: xvith: a peak efw few waits.: is some img!emen:iakeB$s Rrøa® suppressjos teehsiqaas can be iBoerporatei to mitigate a omvemsBtof phoføs onorgios o idside ilm ’Thubism ahsø^atkm band resulting: rø bwof power eoTwcrsiea effieleney.
    [0021j A, ampber of :io5pleiipeo.tdtioas kgye: been, described. Mcvei#iei;es% it will be understood tbai ya«b'£$· pSbillfidatlbb.t te Made witeobt. dépsrttog torp the: spirit and: scope of the dlsclosrøe:
    权利要求:
    Claims (9)
    [1] 1. A sydenr fm pmditongtooadhaiid light to wetlbpoy the system eomprishto: a laser source tSmtprodooes a yeetofigln puts® at a first waydengto Amcfnmt; fnd a. converter configured to fee received to a wellbore,; the laser genre©: adapted te reside remote: from the ecmvefter, fe converter to reeeiee ih© seed ligto pelset tos first wavelength spé<toeto. ari£i generate: light al a second wavelength spectrum that: has a broader range tom the first %AetoengiM::speefeitot. S. Tit© system of d;toe 1, where a the laser source is configured to: reside outside the ...........vdhxev...............................................................................................................................................................................................................................
    [2] 3. The system of elsito: 2, whereto the seed tighf gufe© at to© first waeetegtd specimm Into a; first pO:wet,: the system fiother Comprising an arngjifiet ednf |®y it to fee WCMved: oownhoie, toe amplifier to amgfify toe seed MgM· pulse: at the first: vmvelengifi spectrum to a second power greater tomt the first power,, wherein the converter broadens toe. seed light pulse haymg: the;. second po wer into too iigitoafetho secern! wsvdength spectmnv
    [3] 4. The sysler;· <n daw; 3.. ftvtocr comprising a fiber or>lk: ©able incltoftog an. tofter core and :dn ontef com to catty toe seed, light: prise at toe first wivdfepgth speetritor torgngb. to©Inner core · aiid. a ligtogt a. .tibfe Outer com.
    [4] 5. The system ofoitomA torthef comprising å laser source ai the· at toe third wavelength, whereto: the fiber optic: cafe!©: iy configured to absorb· toe tigixf at &e third wavclcegto So amplifythe seed figito;prte..................................................................................................................................... fe. The system. Of etoim: 5, whereto too laser source to produce toe. light at the third: ttonefengto nidndes 4 first tosår. 1« · f^&tok·· $ ftest tlijgfetv · & second laser to geooMto a. second light, and a combiner to combine: the first light and: the: second light, into the fight at the third Wavelength spectosrto.: ,. llis system of eidife 5, farther cmn prising; a Fite; Bragg- Cfeting fe fefi.te: fee light at tiis third wavelength lp mate mure feah ane pass.: teween tits smpliffef sad fee late. teuoo lp produce; tits light at; feefelfe wateoogtfe
    [5] 8, The „system of efelm 3V whorefe the fiber optic eahk Is doped teih a rare earth fejt configured to .absorb fes fight al lbs fhird wsvetegth. Hl. The system of claim fe wfeereis the fiber opfie cable: includes a ..daal efedfehg teOSffif ilte disposed ih/si ctefe tubs, l'fe, jVmbfeøåtbf hmadbMd llghtfo a wefiboce.; feo method comprising: gundratfeg a pod fight pulse at afiml watelsogihisteteDi ofitfedela wsilboro; trmsmfehig ilts gsofe fight pulse al thei first w&yeigs|t|j speferupi to a dmwfeoie feoasoo insiåe fee wellbore;: ond •at fee dowohoie: Ipeaffea, mo.yefifeg the: seed; light, pulse at fee. first waoeieugfe spectrum fefe fight at; a second wavelength specfeim that has a broader;range; hum fes fifet wooeiongfe speetrtmj, ; .............i L The method of elgko I tf, wherein fed; need light pidfeM the first wavefesgfe.. fe« femmltes a finit power* feetitedfed fefilisr cOfegfisIug: afephfehig, dtenhOlCi,: feo seed fight pulse di feo fixet wbtedcigfe feternøi fe '& ..........second ροfeet gteatertbag·fee fes:. power; and....................................................................................................................................... 'broadening: fee; seed, light pulse at the second power. into the: light at; fed second xgaeeleagfe spoctram, ;
    [6] 121 The method of claim ff., wherein fee second wavelength; spectrum, is sohstafeiaHy between, tee and feor times greater than, fee first wave length. spoetreev
    [7] 13. T.h.e: method; of claim 1L wherein omadefeng: fee seed light pulse having; fee second power filfe fed. fight; at;;fee second waysfengfe fetebaat sfempnasa hfeadshtag fee seed1 light pulse having fed second power into a sofidfeouifengfe.
    [8] 14. The method, of c|ahf. IT :fuif!h.erOfitjjfislpg: tseelvmw the seed light gujge at ihg first and light at a third wmwispgth spectrum f$Ihg a doped opticai ilhef that exhibits: adsorption at the third wayeleegtli speetraxa.
    [9] 15, The methM øf Malm. 14. feitfeer. €0»i|>mi»g pmdudng the IgTt at the: tlhm aeaYslesgth sgeefrom, whéwhi thOkseM light pulse is amplified le generate the light haviag the.seeoed power la msponse Id art: absårptkuiof the light at the third ashveieegth speetrum:.by the doped eptifig! iili:er; I. 6.. The method of eMdi 14. ferdter comprising: tedegdng the light at the third watwlettph .;Speehtr® using a Fiber;.Bragg; Grating bolpre £ ·„ The teethed: of claim I4,:further eompeisirtg h'ausmihihg the light at the third wavelength spectrum- through art outer cere of a The optic caMe a mi the., seed, light pulse through. «η inner core of the uhor optic cable tothedoped optical Ohcr. II. : The method of elaiitr 14, Therein gehemdhg the light ;-u the third wavelength spectrum at ...........the surface composes: :............................................................................................................................................................................................... gep:etatmg å first light; generating a decoiid light; and eenlhinlhg the :!Mt light add the second: lighginto thd:light, at; the third wavelength speciic.ro. IT iTdgslem: lor protfuemg bfoadSaOd light M a we Hi »ore, the sgsleoi comprising: a:laser pulse gehemtor adapted, to reside at a-røcface- wtsidb)a:Wdifeot»..-:ÉL&t:.jirød^ees' a seed light guise at a feét-'w^OlisiB^Éfi-'^étniin:, the seed light pulse: teeing afirstgowen: a laser :S0'utes: to gCuemten light at a third: wavelength spectrum of lesser wavelength than the first wavelength spedlrum; s amplifier to aomfify the seed !jgM: pelse into: s gofer at the first wweleugih .spectrum, the pulse toeinga second -power· tbat Is: .peatsrihaft- tb« first gowep and· a dawmhole converter adspred to reside: dowateie Inside the: wellbore. Ae drmnfiole eedpetier to fireren thø gidss having the second porser, in A light di a second wwdrngth. Aat has d Apader OMge ihati Aetmlse at the first waeeleegth. s|Acmm 20; The sfsteotof cl si fir IT further· cofilp&jfig å 4βρ4·0^ΐΜ.ί ©er that: edhAits afiserption at the third waveipngth, specteigg the doped pf>hpa! 'fiber coimeeied lp Αρ downhole smpiiiter fe rceeise ;hc fightat the third wsselepgtfi: speetaspr.
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    同族专利:
    公开号 | 公开日
    DE112014001865T5|2016-01-14|
    MX363167B|2019-03-13|
    GB2530431B|2020-03-04|
    US9425575B2|2016-08-23|
    MX2015015594A|2016-03-03|
    AU2014278696A1|2015-11-12|
    EP2994610A1|2016-03-16|
    WO2014200639A1|2014-12-18|
    AU2014278696B2|2017-05-11|
    GB201519306D0|2015-12-16|
    US20140362431A1|2014-12-11|
    EP2994610A4|2017-01-04|
    GB2530431A|2016-03-23|
    RO131338A2|2016-08-30|
    NO20151520A1|2015-11-09|
    PL414722A1|2017-01-30|
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    法律状态:
    2018-11-27| PHB| Application deemed withdrawn due to non-payment or other reasons|Effective date: 20181009 |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/915,166|US9425575B2|2013-06-11|2013-06-11|Generating broadband light downhole for wellbore application|
    US201313915166|2013-06-11|
    US2014037574|2014-05-09|
    PCT/US2014/037574|WO2014200639A1|2013-06-11|2014-05-09|Generating broadband light downhole for wellbore application|
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