• 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:
    The invention concerns a method to establish communication between the inner cavity of a drill string and the surrounding material down in a drill hole (60) during the use of a down- the-hole drill unit with a drill string (10), a down-the-hole hammer drill (1), and a source of pressurised medium (11) that delivers a medium under pressure to the down-the-hole hammer drill. Communication is established through: (a) that a tube section (10:1) of the drill string (10) is assigned openings (17), (b) that a piston (15) with an axial channel (16) is arranged, (c) that the piston (15) is inserted into the cavity of the tube section (10:1) in a manner that allows sliding, (d) that the piston (15) allows driving fluid to be led through a channel (16) from the source of pressure (11) to the down-the-hole hammer drill (1), (e) that the piston (15) is assigned a first part (40) of a recovery means (45), which part can be united with a second part (41), (f) that a lifting arrangement (42) is arranged at the surface level, (g) that the second connector (41) of the recovery means (45) is lowered into the drill hole (60), the piston (15) is fished up out of the drill hole and the compartment in the cavity of the tube section (10:1) that is formed is used as a measurement compartment.
    公开号:SE1150083A1
    申请号:SE1150083
    申请日:2011-02-07
    公开日:2012-08-08
    发明作者:Magnus Hoerman
    申请人:Wassara Ab；
    IPC主号:
    专利说明:

    15 20 25 30 35 2 In order to be able to work as quickly and efficiently as possible, it would be desirable that in so-called countersinking, ie. where you use a drill string attached to a submersible hammer consisting of a number of drill pipes connected at the ends, use the drill string to form the desired measuring space and the possibility to perform measurement work at different levels down in the borehole without the need for any special pipe lining. Namely; possibility to "in situ" be able to carry the required measuring instruments directly down into the drill string, without having to go the detour to subsequently form a specially designed pipe liner with measuring openings arranged in the casing of the pipe liner.
    Among the many positive benefits of this is of course time savings that can be obtained because the required measurements can be made directly down in the borehole, as well as achieved cost savings by eliminating or reducing requirements for equipment for lining the borehole. It is thus desirable to make it possible to perform measurements on site "in situ" downhole in a downhole drilling, especially down a borehole in the ground, in order to achieve higher cost efficiency.
    A first object of the present invention is thus to provide a method which makes it possible, immediately after submerged drilling, to establish communication between the bore of the drill string and the ground surrounding the drill string, not least to be able to carry out on-site measurements "in situ" downhole. A second object of the present invention is to provide an apparatus for carrying out the method itself. These two objects of the invention are solved by the method having the features and characteristics stated in claim 1, and a device having the features and characteristics stated in claim 5. Other advantages of the invention appear from the subclaims.
    In one embodiment, the submersible drilling machine can be of a disposable type, ie. after drilling and completed measurements, the submersible hammer can be left down in the borehole.
    The invention is described in more detail below in the form of a non-limiting exemplary embodiment with reference to the accompanying drawing, in which; ära shows longitudinal sections in different steps through a device according to the invention, arranged in a front-located drilling section of a drill string equipped with a submersible drilling machine.
    Figs. 2a-2d schematically show in a number of consecutive steps the different working steps required to establish communication between the borehole hollow and this surrounding ground and the implementation of measurements on site "in situ" down in a borehole in the ground according to the invention.
    Referring to Figs. 1a-1c, a front end of a submerged hammer 1 is shown which has a substantially circular-cylindrical machine housing 2 in which a pressure fluid driven percussion device is arranged arranged to deliver blows against a drill bit 3 which is reciprocally movably mounted in a reciprocating coupling in a chuck. The machine housing 2 has a central supply line 4 for propellant, such as a propellant fluid of water and channels in the drill bit 3 (not shown) via which ducts used drive fluid can flow out and by the action of this drill cuttings, generated during the drilling work, are driven backwards and upwards along the outside of the machine house. This type of submersible hammer has long been well known and may be, for example, of the type described in EP 0394255. Although the present device is described arranged in a liquid-powered submersible drill, it should be understood that the device according to the invention is not limited thereto, but can be arranged in a submersible drill. of any type, for example a pneumatic submersible drill of the type using pressurized air as the propellant. The machine housing 2 is at the rear at the inlet side for driving fluid provided with an end piece 8 which by means of a threaded connection 9 is connected to a drill string 10 consisting of a number of sections of drill pipe axially connected at the ends. The drill bit 3 is rotated during drilling by rotation of the drill string 10 as illustrated by the loop-shaped arrow in Fig. 2a. Drive fluid for driving the submersible hammer is supplied from a pump (not shown) at ground level via the channel 11 in the drill string 10. The channel 11 in the cavity of the drill string 10 then functions as a pressure source. As the hole becomes deeper, new drill pipes are spliced on and the drill string 10 becomes longer. In order for the drill string 1 to be able to be extended by splicing new pipe sections, these are releasably connected at adjacent ends by means of a connecting device 12 comprising a thread which liquid-sealingly connects adjacent pipe sections.
    The above-described material essentially constitutes already known technology. Again with reference to Figs. 1a-1c, the pipe section 10 located at the front of the drill string 10 is denoted 10: 1, i.e. the pipe section located along the bottom of the borehole, receiving an elongate piston member 15 which is axially slidable in the cylindrical cavity of the pipe section 10: 1. The piston member 15 has an axially continuous central channel 16 which allows drive fluid to be conducted in a controlled manner directly from the pressure source to the submersible hammer 1 when the piston member is in its most retracted position. The piston member 15 is sealed against the hollow section of the pipe section 10: 1 so that a space from the pressure source seen after the piston member, i.e. the space between the piston member and the machine housing 2, is delimited from the pressure source.
    As best seen in Fig. 1c, the front pipe section 10: 1 on its mantle surface is provided with a number of longitudinal groove-shaped holes or openings 17 which, for carrying out measurements downhole, allow water to flow into the cavity of the pipe section. The function of said openings 17 will be described in more detail below.
    Thanks to the openings 17, the 10: 1 cavity of the front pipe section can delimit a measuring space. The term "measuring space" as used herein refers to a space delimited by a pipe liner from the surroundings which allows water from the surroundings to flow into the space via one or more openings as with a predetermined C: Documents and Settings leg Desktop disposable hammer 110118 besk.docx 10 15 20 25 30 35 4 total opening area are arranged in the mantle surface of the pipe cladding. The piston member 15 is concentrically received in the pipe section 10: 1 and is intended to move axially slidably inside the pipe section in controlled cooperation with the cylinder bore formed by the cavity of the pipe section.
    The piston member 15 has an outlet for drive fluid defined by a front relatively elongate tubular member 21 made of high quality steel and an inlet for drive fluid defined by a rear relatively short tubular member 22. The rear tubular member 22 is formed as a continuous integral part of the piston member 15, i.e. In one piece with this. To further improve the liquid-sealing properties of the piston member 15, this is provided with a circumferential seal 23 of some polymeric material. The seal 23 is received in a groove-shaped recess 24 on the outer periphery of the piston member 15.
    As mentioned above, the machine housing 2 comprises a central channel 4 intended to lead driving fluid into the percussion housing housed in the machine housing of the percussion hammer when the piston member 15 is in its most inserted position in flow-transmitting contact with the percussion hammer 1 in the free end of the machine housing 2 end piece 8. at the rear is arranged a pipe sleeve 30 intended for flow-transmitting cooperation with the front pipe end 21 of the piston member 15. The pipe sleeve 30 has annular cylindrical space 31 which encloses a sleeve or sealing ring 32 of plastic which is embedded in an annular groove 33 in the space and with which the front end of the pipe piece 21 cooperates when the pipe piece is in the insert in the pipe sleeve as shown in Fig. 1a. The piston member 15 is driven towards its most retracted position by the action of the hydrostatic compressive force which, the driving fluid in the channel 11 exerts on the end surface 15b of the piston member 15 facing the pressure medium source 11 (pump symbolized by an arrow in Fig. 1a) during drilling. By ensuring that hydraulic imbalance prevails between the respective end surfaces 15a and 15b of the piston member, i.e. in that the end surface 15b of the piston means 15 facing the pressure medium source 11 (pump) has an area in area which is always larger than the other end area 15a of the piston means, it is guaranteed that the piston means, even with a prevailing continuum, strives to 2 end piece 8. Dimensioning of sealing ring 32 resp. The ring groove 33 is selected so that a liquid-sealing effect is obtained when the front pipe end 21 of the piston member 15 is received in the end piece 8 of the machine housing 2. To ensure that the front pipe end 21 of the piston member 15 slides correctly into a sealing position the end piece a conical inner surface 35, i.e. a conical extension intended to co-operate with the first pipe end 21 of the piston member 21. It should be understood that the central channel 16 of the piston member 15 forms an extension backwards of the center channel 4 of the machine housing 2 and thus a bypass which can guide drive fluid past the openings 17 formed in the first pipe section 10: 1 mantle surface when the outlet of the piston member 15 is in its most inserted position and in flow-transmitting connection with the hammer via the pipe sleeve 30 in the rear end piece 8 of the machine housing 2.
    C: Documents and Settings leg Desktop disposable hammer 1 10118 besk.docx 10 15 20 25 30 35 5 Inlet for piston body 15, ie. the rear relatively short tubular part 22 simultaneously forms one of two cooperating, male and female part formed axially collapsible coupling parts 40 and 41. These two coupling parts 40, 41 are included in a recycling means generally designated is retrieved from the drill string 10. Said second coupling part 41, formed as a female part, is attached to the end of a wire or the like included in a lifting device generally designated 42.
    This second coupling part 41 is intended to be lowered into a borehole or the like by means of suitable lifting equipment located at ground level (not shown). In the following, lifting device means any crane which, equipped with steel wires, hoists or similar means, can be used for lifting and lowering objects. It should be pointed out that it is common practice to refer to an object contained in a borehole as a fish, and a tool designed for recycling the object as a fishing tool.
    Via a line 47, electrical measuring signals are transmitted to and from a measuring tool 50 or a sensor suspended in the lifting device when the present device is used in carrying out measuring tests down in a borehole. These measurements can be of any kind and include, for example, temperature, flows, groundwater levels. As an alternative, obtained measurement signals can be transmitted via telemetry, ie. wirelessly, via for example a radio link or optically between a transmitter down in the borehole and a receiver at ground level.
    As best seen in Figs. 1a and 1b, the second coupling part 41 fixed at the end of the lifting device 42 comprises a locking member 52, generally designated 52, which is equipped with resilient locking lugs 53 which can engage with the first coupling part 40 formed as a radial relative to the shaft direction. extended end portion 54 of a free end of the rear tubular portion 22 of the piston member 15. The locking action is obtained by the locking lugs 53 engaging behind said radially extended end portion 54, i.e. the locking lugs move towards the diameter-reduced portion of the tubular part. In order to achieve a secure engagement where the locking lugs 53 snap in behind the end portion 54, both the locking lugs and the radially extending end portion have been given substantially sharp-edged designs.
    If Fig. 1c is studied in more detail, it appears that the groove-shaped openings 17 are given such a location on the periphery of the first or front pipe section 10: 1 in relation to the total effective length of the piston member 15 that the central channel 16 of the piston member forms a bypass or extension backwards of the machine housing 2. central channel 4 for direct communication with the pressure source. Due to the sealing action between the piston member 15 and the annular inner cavity of the first pipe section 10: 1, drive fluid is blocked from leaking into the space of the pipe section 10: 1 between the piston member 15 and the machine housing 2, and thus out through groove openings 17 without forced fluid through the piston member 15 central channel 16 flows directly from the pressure source (pump) to the submersible hammer 1.
    C: Documents and Settings | eg Desktop disposable hammer 110118 besk.docx 10 15 20 25 30 35 6 The device described above thus makes it possible to establish communication between the hollow of the drill string and this surrounding ground in a borehole and consequently carry out measurements in place "in situ" down in the borehole. Fig. 2a shows a submersible drilling assembly consisting of a submersible hammer 1 attached to one end of a drill string 10 located in one piece down in a substantially vertical borehole 60 and where a drive flow is supplied by a source of pressure medium connected to a second end of the drill string, whereby in order to enable sampling work to be performed "in situ", the following measurements and steps must initially be taken; that a first pipe section 1011 intended to form part of a drill string 10 is assigned to one or more openings 17 with a certain total opening area on the periphery of the mantle surface of the pipe section, that a piston means 15 having an inlet 22 and an outlet 21 for guiding drive flow through the piston means , that the piston member 15 is arranged so that it is axially slidably movable in the cavity of the first pipe section 10: 1 and so oriented that the outlet of the piston member is facing the inlet 8 of the submersible hammer 1 for drive flow, that the inlet 8 of the submersible hammer 1 and the piston member 15 that they can be put in and out of flow-transmitting connection to each other by axial displacement of the piston means in the first pipe section 1011, in the flow-transmitting position driving flow from pressure medium source to the submersible hammer is led through the piston means, that the piston means inlet 22 is assigned to one part , as male and female part designed e recovery means 40, 41 which allow the piston means 15 to be fished out of the drill string 10 by lowering the second part into the drill string.
    The device works as follows.
    Referring to Figs. 2a-2d, a borehole has been made in the ground by means of the submersible drill assembly in which the required drive fluid for the submersible hammer has been connected directly from the pressure medium source 11 to the submersible hammer through the piston means 15 in transfer position in the front pipe section 10: 1. When the submersible drilling rig has reached the required depth, the piston member 15 is recovered from the drill string 10 by lowering said second cooperating part 41 "the fishing tool" into the borehole via a lifting device, as shown in Fig. 2b. After interconnection of the two cooperating coupling parts 40, 41, the piston member 15 is lifted up the borehole 10 by means of the lifting device 46, as shown in Fig. 2c. In the free measuring space delimited by a borehole lined in the ground by the drill string 10, water flows from the surrounding bedrock into the measuring space, via the openings 17. As shown in Fig. 2d, hanging in a lifting device, a measuring instrument or sensor 50 is lowered to the desired level in the measuring space, after which the desired measured values are registered, for example regarding the permeability of the ground. By means of suitable transmission means, which may comprise the electrical line extending along the cable of the lifting device or alternatively wirelessly via radio link, the obtained measurement data is transmitted to a receiver at ground level (not shown).
    The invention is not limited to what is described above and that shown in the drawings, but can be changed and modified in a number of different ways within the scope of the inventive concept stated in the appended claims.
    C: Documents and Settings leg Desktop disposable hammer 110118 besk.docx
    权利要求:
    Claims (10)
    [1]
    A method for allowing communication to be established between the inner cavity of a drill string and this surrounding ground "in situ" downhole in a borehole (60) using a submersible drill assembly comprising drill string (10) formed by a plurality of drill pipes interconnected at the ends, a submersible hammer (1) attached to one end of the drill string and a source of pressure medium (11) connected to the other end of the drill string which delivers a pressurized medium to the submersible hammer, which method is characterized by the steps of the following operations, (a) a pipe section (10: 1) of the drill string (10) on the casing surface, one or more openings (17) with a predetermined total opening area are assigned, (b) a piston member (15) having an axial through channel (16) is provided, (c) the piston member (15) ) is arranged so that it is axially slidably movable inside the cavity of the pipe section (10: 1), (d) that the piston means (15) is designed so as to allow propellant to be led via the channel (16) from the pressure source (11) t the submersible hammer (1) when the piston member is in its most inserted position in the pipe section (10: 1) and in flow-transmitting contact with the submersible drill assembly (1), (e) that the side of the piston member (15) facing the pressure source (11) a first part (40) is assigned by a recovery means (45) which first part is in a retaining manner connectable to a second part (41) included in said recovery means, (f) that a lifting device (42) is arranged at ground level adjacent to the borehole (60), (g) that the second coupling part (41) of the recovery means (45), fixed in the lifting device (46) arranged at ground level, is brought into retaining cooperation with the first coupling part by being lowered into the borehole (60) by means of the lifting device (42). ), after which the piston member (15) is fished out of the borehole by means of the lifting device and the space thus formed in the cavity of the pipe section (10: 1) can be used as measuring space.
    [2]
    A method according to claim 1, wherein measurements are performed on site "in situ" down in a measuring space thus formed in the borehole (60) by performing the steps of the following operations; 50) or a sensor by means of a lifting device (46) is immersed to a certain level in the formed measuring space, C: Documents and Settings leg Desktop disposable hammer 110118 besk.docx 5 10 15 20 25 30 35 9 obtained measured values are registered by the measuring instrument (50) and transmitted as electrical signals via line or via telemetry up to ground level for further processing.
    [3]
    A method according to any one of claims 1-2, wherein the piston means (15) is driven towards its most retracted position during drilling work by the action of the hydrostatic pressure force exerted by the propellant emitted from the pressure source (11) on the end surface (15b) of the piston means is facing said source of print media.
    [4]
    4.. Method according to one of Claims 1 to 3, in which the openings (17) in the jacket surface are arranged in a first pipe section (10: 1) of the drill string (10), i.e. the pipe section located at the bottom of the borehole adjoins the submersible hammer (1), and the piston member (15) is also arranged so that it is slidable in the inner cavity of said first pipe section. Device for establishing communication between a hollow space of a drill string (10) included in a submersible drilling rig and this surrounding ground in "in situ" down in a borehole (60), a submersible hammer (1) being attached to one end of the drill string (10). 1) and at the other end of the drill string at ground level is connected a pressure medium source (11) which delivers a pressurized medium to the submersible hammer, characterized in that it comprises a pipe section (10: 1) having one or more openings (17) on its casing surface. which openings have a predetermined total opening area, a piston means (15) which is arranged sealingly against the inner hollow wall of the drill string (10) to move axially along the drill pipe inside it, said piston means (15) having a continuous channel (16) which allows a drive flow of pressure medium to be conducted through the piston means and establishing flow communication between the pressure medium source (11) and the submersible hammer (1) when the piston means is in its most inserted position. in the pipe section (10: 1) in flow-transmitting contact with the submersible hammer (1) in which position the pressure medium from the source (11) is led through the channel (16) to the submersible hammer, a ground level lifting device (42) placed adjacent to the borehole (60) , a recovery means (45) comprising first and second retainingly interconnectable parts (40, 41) of which one part (40) is arranged to the piston means (15) and faces the pressure source (11), while the other part (41 ) is attached to the lifting device (42) and by means of the lifting device can be lowered into the borehole for cooperation with the first coupling part (40), whereby after drilling work the piston means is fished out of the borehole by means of the lifting means.
    [5]
    5. C: Documents and Settings | eg Desktop disposable hammer 110118 besk.docx 10 15 20 25 30 10
    [6]
    Device according to claim 5, wherein the channel (16) of the piston means (15) is delimited by tubular parts (21, 22) extending axially from the respective end ends (15a, 15b) of the piston means forming an outlet and an inlet for passing pressure medium, respectively, where the tubular part (21) forming the outlet is in flow-sealing cooperation with a pipe socket (30) arranged in the rear end piece (8) of the machine housing (2) when the piston member is in its most inserted position in the drill string.
    [7]
    Device according to claim 6, wherein recovery means (45) comprising first and second on a retaining, as male and female part formed axially collapsible coupling parts (40, 41) which are arranged to engage with each other by snap action.
    [8]
    Device according to any one of claims 5 - 7, wherein the lifting device (42) is arranged for immersing the second coupling part (41) of the recovery means (45) down into the borehole (60) and cooperating with the first coupling part (40) arranged for the piston means (15). ) and after coupling the coupling parts lifting the piston member (15) out of the borehole.
    [9]
    Device according to any one of claims 5 - 8, wherein the hammer (1) comprises a machine housing (2) whose inlet for drive flow is delimited by a pipe sleeve (30) arranged in its rear end piece, in which the tubular part (21) forming the piston member (15) outlet for passage of propellant medium is located in a liquid-sealing manner when the piston means is in its most inserted position in the pipe section (10: 1).
    [10]
    Use of a pipe section (10: 1) which on the casing surface is assigned one or more openings (17) with a predetermined total opening area at a drill string of a submersible drilling rig to create a measuring space down in a borehole. C: Documents and Settíngs leg Desktop engàngshammare 110118 besk.docx
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    同族专利:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150083A|SE535593C2|2011-02-07|2011-02-07|Method and apparatus for establishing, during lowering drilling, communication between the bore of the drill string and this surrounding ground a borehole|SE1150083A| SE535593C2|2011-02-07|2011-02-07|Method and apparatus for establishing, during lowering drilling, communication between the bore of the drill string and this surrounding ground a borehole|
    JP2013552491A| JP5853032B2|2011-02-07|2012-01-26|Method and apparatus for forming a communication between the gap of the drill string and the surrounding material during excavation by the down-the-hole method|
    AU2012214869A| AU2012214869B2|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    US13/983,533| US9453403B2|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    PCT/SE2012/050076| WO2012108818A1|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    KR1020137023221A| KR101825253B1|2011-02-07|2012-01-26|Mehthod and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    CA2824896A| CA2824896C|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    CN2012800067640A| CN103339347A|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    EP12744713.4A| EP2673467B1|2011-02-07|2012-01-26|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
    ES12744713T| ES2848160T3|2011-02-07|2012-01-26|Method and arrangement for establishing, during downhole drilling, communication between the drillstring cavity and surrounding material|
    ZA2013/05130A| ZA201305130B|2011-02-07|2013-07-08|Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material|
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