WO2023000649A1 - Tuyau double - Google Patents

Tuyau double Download PDF

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Publication number
WO2023000649A1
WO2023000649A1 PCT/CN2022/075206 CN2022075206W WO2023000649A1 WO 2023000649 A1 WO2023000649 A1 WO 2023000649A1 CN 2022075206 W CN2022075206 W CN 2022075206W WO 2023000649 A1 WO2023000649 A1 WO 2023000649A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe string
bearing body
guide device
inner pipe
flexible outer
Prior art date
Application number
PCT/CN2022/075206
Other languages
English (en)
Chinese (zh)
Inventor
徐梓辰
Original Assignee
万晓跃
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202121638377.1U external-priority patent/CN215907766U/zh
Priority claimed from CN202110814021.7A external-priority patent/CN115637927A/zh
Application filed by 万晓跃 filed Critical 万晓跃
Publication of WO2023000649A1 publication Critical patent/WO2023000649A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes

Definitions

  • Double pipe related application This application claims the priority of the Chinese invention patent with the patent application number 202110814021.7, the application date is 2021.07.19, and the invention name is "double pipe”; this application requires the patent application number 202121638377.1, and the application date is 2021.07.19 1.
  • Priority of Chinese utility model patent titled "double pipe” Technical field
  • the present invention relates to the field of drilling technology and oil and gas production technology, especially a kind of double pipe.
  • BACKGROUND OF THE INVENTION Exploration and development of underground material resources and space resources require extensive application of drilling techniques.
  • the existing steering drilling technologies mainly include downhole motor steering drilling technology and rotary steering drilling technology.
  • the maximum slope build-up rate achievable by the above-mentioned technologies generally does not exceed 15°/30 meters.
  • the present invention proposes to use double flexible pipes with guiding devices to realize high-curvature controllable trajectory drilling or realize extended well sections through high-curvature well sections drilling.
  • the advantage is that during the drilling process, the hinged flexible outer pipe is used as the protective pipe to protect and support the well wall, and the flexible inner pipe string and the hinged flexible outer pipe string form a circulation channel for drilling fluid circulation, which realizes the drilling fluid circulation.
  • the object of the present invention is to provide a dual pipe enabling steerable drilling with a certain borehole extension.
  • the present invention provides a double pipe, which includes: an inner pipe string, the lower end of which is connected with a guide device, the lower end of the guide device is connected with a drill bit, and the guide device
  • the drill bit can be driven to deflect at a preset angle, and the inside of the inner pipe string is provided with a through flow channel for circulation of drilling circulating medium; a flexible outer pipe string, which is sleeved outside the inner pipe string, and an annular space for the circulation of the drilling circulating medium is formed between the flexible outer pipe string and the inner pipe string, and the guide device
  • the upper part or the lower part of the inner pipe string is hinged to the corresponding position of the lower part of the flexible outer pipe string.
  • the double pipe of the present invention by setting the guide device, under the condition of rotation, the drill bit can be driven by the guide device to deflect the preset angle according to the preset direction, so as to change the trajectory of the wellbore, so as to realize short Radius build-up;
  • the torque used to drive the drill bit to rotate can be well transmitted to the steering device, so as to realize steerable drilling with a certain wellbore extension length.
  • FIG. 1 is a kind of structural representation of double pipe of the present invention
  • Fig. 2 is another kind of structural representation of double pipe of the present invention
  • Fig. 3 is another kind of structural representation of double pipe of the present invention
  • Fig. 4 is this Yet another structural schematic view of the double pipe of the invention
  • FIG. 5 is a diagram of the installation structure of the double pipe of the present invention
  • FIG. 6 is a partial enlarged view of A in FIG. 4 .
  • Inner pipe string 11. Through flow channel; 111. Pressure hose; 112. Rigid pipe string;
  • the present invention provides a double pipe, which includes an inner pipe string 1 and a flexible outer pipe string 4, wherein: the lower end of the inner pipe string 1 is connected with a guide device 2, and the guide device 2 The lower end is connected with a drill bit 3, and the guide device 2 can drive the drill bit 3 to deflect a preset angle, that is, the guide device 2 can drive the drill bit 3 to deflect a preset angle in a preset direction, thereby changing the wellbore trajectory to achieve a short build-up rate;
  • the inside of the pipe string 1 is provided with a through flow channel 11 for the circulation of the drilling circulation medium.
  • the drilling circulation medium can flow to the drill bit 3 through the through flow channel 11, so as to carry the rock deviation at the drill bit 3 and return through the annular space between the inner and outer pipe strings.
  • the flexible outer string 4 is sleeved outside the inner string 1, and the flexible outer string 4 and the inner string 1 An annular space is formed between them for circulation of the drilling circulating medium, and the drilling circulating medium can return to the wellhead from the annular space, and the upper part of the guide device 2 or the lower part of the inner pipe string 1 is hinged to the corresponding position of the lower part of the flexible outer pipe string 4, so that the flexible
  • the outer pipe string 4 can not only transmit the WOB torque to the guide device 2, but also protect the inner pipe string 1.
  • the double pipe of the present invention by setting the guide device 2, can pass through the guide device 2 under the condition of rotation.
  • the device 2 drives the drill bit 3 to deflect the preset angle according to the preset direction to change the wellbore trajectory, thereby realizing short-radius deflection; by setting the flexible outer string 4, the steering device 2 can be well guided under the condition of rotation
  • the torque used to drive the rotation of the drill bit 3 is transmitted, so as to realize steerable drilling with a certain wellbore extension length.
  • the flexible outer string 4 includes a plurality of sequentially hinged from top to bottom
  • the outer connecting short joints 41 of the two adjacent outer connecting joints 41 are connected through the outer hinge structure 42, and the lowermost outer connecting joints 41 are connected with the upper end of the guide device 2, that is, the flexible outer pipe string 4 It is a hinged structure.
  • the outer hinge structure 42 may be the matching structure of the universal joint and the sleeve 21 in the prior art, or the matching structure of the ball seat and the ball head in the prior art, which will not be repeated here.
  • the flexible outer pipe string 4 may also be a slotted pipe, and, in order to ensure the tightness of the annular space, the slots of the slotted pipe are filled with sealing material.
  • the inner pipe string 1 is a pressure-bearing hose 111 or a rigid pipe string 112. During use, the pressure-bearing hose 111 or the rigid pipe string 112 can be selected as the inner pipe string 1 according to the trajectory of the drilled well. Further, as shown in Fig. 1, Fig. 2 and Fig.
  • a plurality of centralizing devices 7 arranged at intervals are arranged between the flexible outer pipe string 4 and the inner pipe string 1, and the centralizing devices 7 can keep the inner pipe string 1 and the flexible outer pipe
  • An annular space is always formed between the strings 4 to ensure that the circulating medium can flow from the inside of the inner string 1 to the drill bit 3, and then return to the wellhead from the annular space between the inner string 1 and the flexible outer string 4.
  • a stabilizing device 7 is provided between each outer connecting sub-section 41 and the inner pipe string 1 to avoid buckling or twisting between each outer connecting sub-section 41, which hinders the transmission of the WOB torque, so that the WOB torque can be Passed smoothly. Further, as shown in FIGS.
  • the centralizing device 7 is a centralizing bearing 71 or a roller centralizer 72.
  • both the centralizing bearing 71 and the roller centralizer 72 can make the inner pipe string 1 relatively flexible to the outer pipe string 4. Rotate to transmit drilling power during the process of inserting into mud or other rheological formations.
  • the roller centralizer 72 can also play a supporting role.
  • a suspension device 6 is connected between the inner pipe string 1 and the flexible outer pipe string 4, and the suspension device 6 is located on the upper part of the inner pipe string 1.
  • the suspension device 6 includes a thrust bearing and a righting bearing 71, or a composite bearing with both righting and thrust functions, so that the axial displacement of the inner pipe string 1 and the flexible outer pipe string 4 does not occur, and the inner pipe string 4 can not be hindered at the same time.
  • the tubular string 1 rotates inside the flexible outer tubular string 4 .
  • the steering device 2 is connected to the wellhead control terminal through a jumper line 9, and the control terminal of the wellhead can issue control instructions to the steering device 2.
  • the control terminal of the wellhead can also guide the steering device.
  • the device 2 transmits electric power to avoid the extra cost and the risk of power failure caused by downhole power generation; in the embodiment shown in Fig. It is transmitted to the hydraulic system 52 to realize steering control.
  • the guiding device 2 includes a transmission shaft 23, a bearing body 22 and a sleeve 21 which are sheathed sequentially from the inside to the outside, and the upper end of the sleeve 21 and the flexible outer pipe column 4 The lower end is hinged, the upper end of the bearing body 22 is connected to the lower end of the inner pipe string 1, the lower end of the transmission shaft 23 is connected to the drill bit 3, and an annular movable space is provided between the transmission shaft 23 and the bearing body 22, and a deflection is provided in the annular movable space.
  • the deflection mechanism can drive the transmission shaft 23 to move relative to the bearing body 22, so as to drive the drill bit 3 to deflect a preset angle in a preset direction, thereby changing the wellbore trajectory, Thereby realizing short-radius build-up.
  • the deflection mechanism can drive the transmission shaft 23 to move relative to the bearing body 22, so as to drive the drill bit 3 to deflect a preset angle in a preset direction, thereby changing the wellbore trajectory, Thereby realizing short-radius build-up.
  • the upper part of the sleeve 21 is connected to the transmission shaft 23 or the bearing body 22 through a first hinge structure 24, and the deflection mechanism includes at least three sets of edges
  • the structure accommodation cavity and the driving piston structure arranged in the piston structure accommodation cavity, the driving piston structure can push the transmission shaft 23 and the bearing body 22 to rotate relative to the sleeve, so that the drill bit 3 at the lower end of the bearing body 22 can cut the symmetrical orientation laterally strata.
  • the lower part of the sleeve 21 is connected to the transmission shaft 23 or the bearing body 22 through a first hinge structure 24, and the driving piston structure can Push the transmission shaft 23 and the bearing body 22 to deflect relative to the sleeve.
  • the bearing body and the transmission shaft use the first hinge structure 24 as a fulcrum to pry the drill bit to cut the formation in the corresponding orientation.
  • the transmission shaft 23 and the bearing body 22 are two independent blocks connected by a central bearing; or, the bearing body 22 itself plays the role of a transmission shaft, driving the drill bit to rotate to cut the formation, that is, the implementation In this case, the separate transmission shaft 23 can be omitted.
  • drill bits include hydrojet bits for cutting broken soft formations.
  • the deflection mechanism includes an eccentric ring 26 and an electric drive actuator 27, the electric drive actuator 27 is arranged on the bearing body 22, and the eccentric ring 26 is arranged on the drive shaft 23 and the Between the bearing bodies 22, the lower part of the transmission shaft 23 and the bearing body 22 are connected through a second hinge structure 28.
  • the electric drive actuator 27 can drive the eccentric ring 26 to rotate, and the rotation of the eccentric ring 26 can drive the transmission shaft 23 and the bearing body.
  • the body 22 moves relative to each other.
  • the electrical actuator is a drive motor, which can drive the eccentric ring 26 to rotate, and the rotation of the eccentric ring 26 can drive the transmission shaft 23 to swing around the second hinge structure 28 and/or around the bearing body 22
  • the deflection mechanism can also adopt any other existing structure that can drive the drill bit to deflect the preset angle according to the preset direction.
  • the double pipe of the present invention is provided with a guide device so that under the condition of rotation, the drill bit can be driven by the guide device to deflect a preset angle in a preset direction, so as to change the wellbore trajectory, thereby achieving short-radius deflection ;
  • the torque for driving the drill bit to rotate can be well transmitted to the steering device, so as to realize the steerable drilling with a certain wellbore extension length.
  • the present invention provides a double pipe, which includes: an inner pipe string 1, a guide device 2 is connected to the lower end of the guide device 2, and a drill bit 3 is connected to the lower end of the guide device 2 , the guiding device 2 can drive the drill bit 3 to deflect at a preset angle, and the interior of the inner pipe string 1 is provided with a through flow channel for the circulation of drilling circulating medium; the flexible outer pipe string 4 is sleeved on the outside of the inner pipe string 1 and is flexible An annular space for circulation of drilling circulating medium is formed between the outer string 4 and the inner string 1 .
  • the drilling circulation medium when drilling in the positive circulation mode, can flow through the through flow channel inside the inner pipe string 1, flow through the bearing body or the transmission shaft, and then flow through the drill bit to remove the rock and soil debris at the bottom of the well. It is taken away from the bottom of the well, then flows through the annular space between the bearing body and the sleeve, and then continues to flow through the annular space formed between the flexible outer string 4 and the inner string 1 to return to the wellhead.
  • the drilling circulation medium can pass through the annular space formed between the flexible outer string 4 and the inner string 1, and flow to the annular space between the sleeve and the bearing body , and then flows through the drill bit to take the rock and soil fragments at the bottom of the well away from the bottom of the well, and the returned drilling circulating medium flows to the inner pipe string through the through passage in the bearing body or the transmission shaft, and returns to the wellhead through the inner pipe string.
  • the circulation modes of the above two drilling circulating media can largely avoid the erosion of the soil by the drilling fluid.
  • annular space 5 is always formed between the inner pipe string 1 and the flexible outer pipe string 4 to ensure that the circulating medium can flow from the inside of the inner pipe string 1 to the drill bit 3, and then from the inner pipe string 1 and the flexible outer pipe string 4.
  • the annular space 5 between the flexible outer string 4 returns to the wellhead, or the circulating medium can flow from the annular space 5 between the inner string 1 and the flexible outer string 4 to the drill bit 3, and then return to the wellhead from inside the inner string 1.
  • the wellbore trajectory will be deflected to this side, thereby changing the wellbore trajectory.
  • the steering device 2 drives the drill bit 3 to deflect by a preset angle to deflect the wellbore trajectory. Since the flexible outer tubing string 4 is flexible, the flexible outer tubing string 4 will also deflect along with the deflection of the wellbore trajectory.
  • the guide device 2 can be fixedly connected to the lower end of the flexible outer pipe string 4 , and the guide device 2 deflects together with the flexible outer pipe string 4 .
  • the guide device 2 and the flexible outer pipe string 4 can be connected in a hinged manner, specifically, the guide device 2 and the flexible outer pipe string 4 The hinges are realized through the outer hinge structure 42.
  • the guide device 2 is connected to the lower end of the inner pipe string 1, and the guide device 2 is connected to the lower end of the inner pipe string 1.
  • the guide device 2 can deflect relative to the flexible outer pipe string 4. .
  • the guiding device includes a bearing body and a sleeve, and the upper end of the sleeve is connected with the lower part of the flexible outer string Hinged, the upper end of the bearing body is connected to the lower end of the inner pipe string, and the drill bit is connected to the lower end of the bearing body.
  • the guide device 2 and the flexible outer pipe string 4 are hinged through the casing 21 being hinged to the flexible outer pipe string 4 . Further, the bearing body 22 can deflect relative to the sleeve 21, thereby driving the drill bit 3 to deflect.
  • the guiding device 2 also includes a transmission shaft 23, the upper end of the sleeve 21 is hinged to the lower end of the flexible outer pipe string 4, the upper end of the transmission shaft 23 is connected to the lower end of the inner pipe string 1, and the transmission The lower end of the shaft 23 is in contact with the drill bit 3 .
  • the bearing body 22 is rotatably connected to the transmission shaft 23 through a central bearing 51 , and the transmission shaft 23 can rotate around its own axis.
  • the drill bit 3 is connected with the bearing body 22 through the transmission shaft 23 . As shown in FIG.
  • the transmission shaft 23 can deflect relative to the sleeve 21, and the drill bit 3 is connected to the lower end of the transmission shaft 23, thereby driving the drill bit 3 to deflect, so that the guide device 2 drives the drill bit 3 to deflect by a preset angle.
  • the sleeve 21 and the bearing body 22 are connected through a first hinge structure 24 , and the first hinge structure 24 is arranged on the upper part of the sleeve 21 .
  • the first hinged structure 24 is not limited to be disposed on the upper part of the sleeve 21 , but can also be disposed on the middle or lower part of the sleeve 21 , and the first hinged structure 24 serves as a fulcrum for the bearing body 22 to rotate relative to the sleeve 21 .
  • the structure in which the sleeve 21 and the bearing body 22 are connected through the first hinge structure 24 has been introduced above.
  • the connection between the sleeve 21 and the bearing body 22 is not limited to the first hinge structure 24.
  • the sleeve 21 and the bearing body 22 Other structures capable of realizing the deflectable connection between the bearing body 22 and the sleeve 21 may also be used.
  • the bearing body 22 is connected to the inner pipe string 1.
  • the rotatable connection structure can also be arranged between the inner pipe string 1 and the sleeve 21, that is, the inner pipe string 1 and the sleeve 21 are rotatable. ground connection, the bearing body 22 drives the inner pipe string 1 to deflect together relative to the sleeve 21; or, as shown in FIG. 4 and FIG. As shown in FIG. 3 , the connection structure between the transmission shaft 23 and the bearing body 22 through the second hinge structure 28 has been introduced above.
  • connection between the transmission shaft 23 and the bearing body 22 is not limited to the use of the second hinged structure 28, and other rotatably connected structures can also be used between the transmission shaft 23 and the bearing body 22, and the rotatably connected structure serves as the transmission shaft 23 is a fulcrum for rotation relative to the bearing body 22 .
  • a first centering structure 291 is provided between the upper part of the bearing body 22 and the sleeve 21, and the bearing body
  • a second supporting structure 292 is provided between the lower part of 22 and the sleeve 21 .
  • the transmission shaft 23 is connected with a deflection mechanism, and the deflection mechanism can drive the transmission shaft 23 to deflect relative to the sleeve 21 .
  • the deflection mechanism drives the transmission shaft 23 and the bearing body 22 to deflect relative to the sleeve 21; A deflection movement takes place so that a relative deflection of the transmission shaft 23 relative to the sleeve 21 is achieved.
  • the bearing body is provided with at least one group of driving hydraulic cylinders, and the driving hydraulic cylinders include a piston structure accommodating chamber arranged in the outer wall of the bearing body and a driving piston structure arranged in the piston structure accommodating chamber; the driving piston structure can push the bearing body Relative sleeve deflection movement.
  • the deflection mechanism includes at least three sets of driving hydraulic cylinders 25 arranged at intervals along the circumferential direction of the bearing body 22.
  • each driving hydraulic cylinder 25 is evenly arranged along the circumferential direction of the bearing body 22.
  • the driving piston structure can push the bearing body 22 to move relative to the sleeve 21, so that the drill bit 3 at the lower end of the bearing body 22 can laterally cut the formation in a symmetrical orientation.
  • the first hinged structure is arranged under the driving hydraulic cylinder, or the driving hydraulic cylinder is arranged under the first hinged structure.
  • a hydraulic system 52 is also provided on the bearing body, and the hydraulic system 52 is used to adjust the hydraulic pressure inside the driving hydraulic cylinder and is used to abut against the sleeve.
  • the deflection mechanism includes an eccentric ring 26 and an electric drive actuator 27, the electric drive actuator 27 is arranged on the carrying body 22, the eccentric ring 26 is arranged between the transmission shaft 23 and the carrying body 22, and the electric drive actuator 27 can drive the eccentric ring 26 to rotate, and the rotation of the eccentric ring 26 can drive the transmission shaft 23 and the bearing body 22 to move relative to each other.
  • the electrical actuator is a drive motor, and the drive motor can drive the eccentric ring 26 to rotate.
  • the driving transmission shaft 23 swings around the second hinge structure 28 and/or rotates around the axis of the bearing body 22 .
  • the connection structure of the deflection mechanism, the transmission shaft 23 and the bearing body 22 has been introduced above, and will not be repeated here.
  • the deflection mechanism can adopt the structure in the prior art.
  • the wellhead is provided with a power mechanism 99, and the power mechanism 99 is connected with the inner pipe string 1 and/or the flexible outer pipe string 4, so as to provide the drill bit 3 with a rotating break through the inner pipe string 1 and/or the flexible outer pipe string 4.
  • the power mechanism is a top drive device, a screw motor, a turntable device or other rotary drive devices with equivalent functions.
  • a plurality of centralizing devices arranged at intervals are arranged between the flexible outer pipe string and the inner pipe string; the centralizing devices are fixedly connected to the outer side of the flexible outer pipe string, and the centralizing devices are provided with holes for circulation of drilling circulating medium.
  • the centralizing device can be a centralizing bearing or a roller centralizer.
  • the flexible outer pipe string includes a plurality of outer connection sub-joints hinged sequentially from top to bottom. Two adjacent outer connection sub-joints are connected by an outer hinge structure, and the outermost connection sub-joint at the bottom is connected with the guide device. Further, a stabilizing device is provided between each outer connection nipple and the inner pipe string.
  • the inner pipe string is a pressure hose, a composite material pipe string or an elastic metal pipe string.
  • the inner tubing string may consist of multiple interconnected pup joints.
  • a suspension device is connected between the inner pipe string and the flexible outer pipe string, and the suspension device is located on the upper part of the inner pipe string.
  • the suspension device is also provided with holes for circulation of drilling circulation medium. Structures such as jumper wires have already been described in Scheme 1, and will not be repeated here.
  • Scheme 1 Scheme 1
  • jumper wires have already been described in Scheme 1, and will not be repeated here.
  • the above descriptions are only illustrative specific implementations of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concepts and principles of the present invention shall fall within the protection scope of the present invention.

Abstract

Tuyau double, comprenant une colonne de tuyau interne (1) et une colonne de tuyau externe flexible (4). L'extrémité inférieure de la colonne de tuyau interne est reliée à un dispositif de guidage (2). L'extrémité inférieure du dispositif de guidage est reliée à un trépan (3). Le dispositif de guidage peut amener le trépan à dévier selon un angle prédéfini, et l'intérieur de la colonne de tuyau interne est pourvu d'un canal d'écoulement traversant (11) utilisé pour faire circuler un milieu de circulation de forage. La colonne de tuyau externe flexible est emmanchée sur l'extérieur de la colonne de tuyau interne. Un espace annulaire (5) pour faire circuler le milieu de circulation de forage est formé entre la colonne de tuyau externe flexible et la colonne de tuyau interne, et la partie supérieure du dispositif de guidage ou la partie inférieure de la colonne de tuyau interne est articulée sur la partie inférieure de la colonne de tuyau externe flexible. Dans la condition où le tuyau double tourne, le trépan peut être entraîné par le dispositif de guidage pour dévier selon un angle prédéfini dans une direction prédéfinie, de façon à modifier la trajectoire d'un trou de forage, ce qui permet d'obtenir un taux d'accumulation réduit.
PCT/CN2022/075206 2021-07-19 2022-01-30 Tuyau double WO2023000649A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202121638377.1U CN215907766U (zh) 2021-07-19 2021-07-19 双重管
CN202110814021.7A CN115637927A (zh) 2021-07-19 2021-07-19 双重管
CN202110814021.7 2021-07-19
CN202121638377.1 2021-07-19

Publications (1)

Publication Number Publication Date
WO2023000649A1 true WO2023000649A1 (fr) 2023-01-26

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ID=84980580

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/075206 WO2023000649A1 (fr) 2021-07-19 2022-01-30 Tuyau double

Country Status (1)

Country Link
WO (1) WO2023000649A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2466335Y (zh) * 2000-10-15 2001-12-19 张书明 一种柔性钻具
US20050103527A1 (en) * 2003-11-13 2005-05-19 Church Kris L. Dual wall drill string assembly
CN101078335A (zh) * 2007-06-28 2007-11-28 北京万维亿通科技发展有限公司 一种超短半径径向水平钻井、完井工具及其工艺
US20090223719A1 (en) * 2008-03-06 2009-09-10 Able Robert E Dual string orbital drilling system
CN107605402A (zh) * 2017-11-06 2018-01-19 中煤科工集团西安研究院有限公司 煤矿井下碎软煤层挠性内控旋转定向钻进系统及钻进方法
CN213597871U (zh) * 2020-08-10 2021-07-02 万晓跃 短半径可控轨迹钻井工具

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2466335Y (zh) * 2000-10-15 2001-12-19 张书明 一种柔性钻具
US20050103527A1 (en) * 2003-11-13 2005-05-19 Church Kris L. Dual wall drill string assembly
CN101078335A (zh) * 2007-06-28 2007-11-28 北京万维亿通科技发展有限公司 一种超短半径径向水平钻井、完井工具及其工艺
US20090223719A1 (en) * 2008-03-06 2009-09-10 Able Robert E Dual string orbital drilling system
CN107605402A (zh) * 2017-11-06 2018-01-19 中煤科工集团西安研究院有限公司 煤矿井下碎软煤层挠性内控旋转定向钻进系统及钻进方法
CN213597871U (zh) * 2020-08-10 2021-07-02 万晓跃 短半径可控轨迹钻井工具

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