Torsion type windowing and drilling integrated steering device and operation method thereof

Abstract

The invention discloses a torsion type windowing and drilling integrated steering device and an operation method thereof.The device comprises a connector, a clamp holder, a steering gear and a twister, the connector is provided with an inner cylinder and an outer cylinder slidably connected to the inner cylinder in a sleeving mode, a first reversing part is formed on the outer wall of the inner cylinder, and a second reversing part is formed on the inner wall of the outer cylinder; a torsion plug for axially limiting the inner cylinder is arranged between the outer cylinder and the inner cylinder; the clamp holder is connected with the inner cylinder, a first channel, a second channel and a third reversing part are arranged on the clamp holder, and a groove cavity is formed in the middle of the clamp holder; the steering gear is arranged in the groove cavity in a penetrating mode, a windowing channel and a drilling channel which are not communicated with each other are arranged in the steering gear, a preset phase angle is formed between outflow holes of the windowing channel and the drilling channel, and the windowing channel and the drilling channel are communicated with the inner cylinder through a first channel and a second channel respectively. The twisting device is connected with the clamping device, a reversing rail is arranged on the twisting device, and the third reversing part is arranged in the reversing rail; and the like. According to the invention, underground windowing and drilling integrated operation can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling equipment, and in particular to a torsion-type window-opening drilling integrated steering device and an operating method thereof. Background Art

[0002] Ultra-short radius sidetracking horizontal well drilling technology (also known as radial horizontal well drilling technology) refers to drilling one or more horizontal wells radially distributed in a radial direction from the vertical direction to the horizontal direction in a vertical wellbore under ultra-short radius conditions (i.e., radius less than or equal to 300mm), and constructing a three-dimensional oil and gas migration network of "one layer with multiple branches, one well with multiple layers" in the reservoir, which can greatly improve the efficiency of oil and gas migration and increase the production of a single well. In addition, ultra-short radius sidetracking horizontal well drilling technology has a good application prospect for the exploitation of residual oil and gas in the undepleted area of ​​the oil field and the development of unconventional oil and gas fields, so the development of the steering device is the core difficulty of this technology.

[0003] At present, although the steering device has solved the problems of changing direction under ultra-short radius conditions and steering inside the casing, there is still a problem that the friction loss of the steering track is large, which limits the hydraulic power transmitted to the well, resulting in difficulties in opening casing windows. There are also problems such as low efficiency, high cost, and poor hole opening effect due to the need to lower the tubing string twice for window opening and drilling operations. There are also problems such as the consumption of steering gear self-advance force. Therefore, the research and development of high-performance steering devices has become a key problem restricting the development of hydraulic jet radial horizontal well technology. Summary of the invention

[0004] The purpose of the present invention is to provide a torsion-type integrated window opening and drilling steering device and an operating method thereof, so as to at least solve the problems of difficulty in casing window opening and low drilling efficiency in the integrated construction of underground window opening and steering drilling by the existing steering device.

[0005] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] The present invention provides a torsion-type window opening and drilling integrated steering device for underground window opening and steering drilling integrated construction operations, comprising: a connector, comprising an inner cylinder and an outer cylinder slidably sleeved outside the inner cylinder, a first reversing portion being formed on the outer wall of the inner cylinder, a second reversing portion being formed on the inner wall of the outer cylinder, a torsion plug for axially limiting the inner cylinder is arranged between the outer cylinder and the inner cylinder; a clamp connected to the inner cylinder, the clamp being provided with a first channel, a second channel and a third reversing portion, a groove cavity being arranged in the middle of the clamp; a steering gear penetrating the groove cavity, a window opening channel and a drilling channel which are not connected to each other being arranged in the steering gear, an outflow hole of the window opening channel and an outflow hole of the drilling channel having a preset phase angle, the window opening channel being connected to the inner cylinder through the first channel, and the drilling channel being connected to the inner cylinder through the second channel; a twister connected to the clamp, the twister being provided with a reversing track, the The third reversing part is placed in the reversing track; the torsion-type window opening and drilling integrated steering device has a window opening operation state and a drilling operation state. In the window opening operation state, the drilling channel is in a blocked state, and the jet liquid is ejected from the outlet of the window opening channel to the window opening position; in the drilling operation state, the drilling channel is in a conducting state, and the drilling pipe string extends from the outlet of the drilling channel to the window opening position; the inner cylinder can rotate under the action of external torque, drive the clamp to rotate and make the third reversing part move along the reversing track. When the third reversing part climbs to the highest point of the reversing track, the first reversing part is located above the second reversing part. When the third reversing part descends along the reversing track, the first reversing part passes over and falls from the top of the second reversing part, so that the clamp drives the steering gear to rotate through the preset phase angle, and the torsion-type window opening and drilling integrated steering device switches from the window opening operation state to the drilling operation state.

[0007] Furthermore, a guide block is embedded in the clamp, and the guide block is arranged below the connection between the clamp and the inner tube. The guide block has a guide surface inclined toward the second channel, and a drainage channel connected between the first channel and the inner tube.

[0008] Specifically, the middle outer wall of the inner cylinder extends radially inward to form a groove, the first reversing portion is arranged in the groove, and the lower portion of the inner cylinder forms a connecting portion connected to the clamper.

[0009] Preferably, along the axial direction of the inner cylinder, the length of the groove is the same as the sum of the lengths of the first reversing portion and the second reversing portion.

[0010] Preferably, along the radial direction of the inner cylinder, the sum of the thicknesses of the first direction-changing portion and the second direction-changing portion is greater than the depth of the groove.

[0011] Preferably, the reversing track has a climbing track segment and a descending track segment. When the third reversing part climbs along the climbing track segment, the first reversing part spirally rises and moves upward after contacting the second reversing part. When the third reversing part climbs to the highest point of the climbing track segment, the first reversing part moves to above the second reversing part. When the third reversing part enters the descending track segment and moves downward, the first reversing part passes over the second reversing part and falls down.

[0012] Preferably, a plurality of sealing ring grooves are provided on the upper outer wall of the inner cylinder and are arranged at intervals along the axial direction thereof, and sealing rings are arranged in the sealing ring grooves.

[0013] Preferably, along the axial direction of the diverter, the window opening channel extends in a straight line, and the drilling channel extends in an arc shape.

[0014] Preferably, a cavity is formed at the lower part of the clamp, the twister is sleeved in the cavity, and a bottom plug is provided between the clamp and the twister to limit the axial position of the twister.

[0015] Preferably, the torsional window-opening and drilling integrated steering device further comprises a sealing ball for sealing the drilling channel.

[0016] Another object of the present invention is to provide an operating method of a torsional window opening and drilling integrated steering device, the operating method of the torsional window opening and drilling integrated steering device is implemented by the torsional window opening and drilling integrated steering device as described above, including: positioning, lowering the torsional window opening and drilling integrated steering device to the target layer through the oil pipe, and aligning the outflow hole of the window opening channel with the window opening position; window opening operation, after the positioning is completed, inserting a sealing ball to seal the drilling channel, and then injecting fluid into the oil pipe pump to make the jet liquid spray from the outflow hole of the window opening channel to the window opening position; drilling operation, after the window opening operation is completed, stopping the pumping of the injected fluid, and performing the jet liquid backflow, after the jet liquid and the sealing ball are backflowed, twisting the pipe string to align the outflow hole of the drilling channel with the window opening position, and then lowering the drilling pipe string into the oil pipe.

[0017] The characteristics and advantages of the present invention are: the window opening operation of the torsion window opening and drilling integrated steering device provided by the present application mainly utilizes abrasive jets to open windows, and the jet liquid ejected from the window opening channel is directly opposite to the window opening position, with good hole opening effect, high efficiency and large aperture; after the window opening is completed, it is only necessary to perform a twisting operation on the pipe column on the ground without any other control, so that the drilling channel can be directly opposite to the window opening position, thereby realizing the conversion of the device from the window opening operation state to the drilling operation state, and the operation is simple and easy to control on the well; the torsion window opening and drilling integrated steering device provided by the present application only needs the next pipe column to drill a radial branch underground, and through the coordination of up and down twisting, the whole process only needs to be driven on the ground once, and the switching from the window opening operation state to the drilling operation state can be realized underground, which has the beneficial effects of high switching success rate, simplified construction process, improved operation efficiency, and reduced economic cost and operation risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural schematic diagram of the twisted window-opening and drilling integrated steering device provided in an embodiment of the present invention in a window-opening operation state;

[0020] Figure 2 It is a structural schematic diagram of the twisted window-opening and drilling integrated steering device provided in an embodiment of the present invention in a drilling operation state;

[0021] Figure 3 It is a schematic diagram of the state structure of the twisting window-opening and drilling integrated steering device provided in an embodiment of the present invention before performing a twisting operation;

[0022] Figure 4 It is a schematic diagram of the state structure of the twisting window-opening and drilling integrated steering device provided in an embodiment of the present invention during a twisting operation;

[0023] Figure 5 It is a schematic diagram of the inner cylinder structure of the connector in the twisting window drilling integrated steering device provided in an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the outer cylinder structure of the connector in the twisting window drilling integrated steering device provided in an embodiment of the present invention;

[0025] Figure 7It is a schematic structural diagram of a clamp in a twisting window-opening and drilling integrated steering device provided in an embodiment of the present invention;

[0026] Figure 8 for Figure 7 AA cross-sectional diagram of ;

[0027] Fig. 9 for Figure 7 BB cross-sectional diagram;

[0028] Fig.10 It is a structural schematic diagram of a steering gear in a twisting window-opening and drilling integrated steering device provided in an embodiment of the present invention;

[0029] Fig.11 It is a schematic structural diagram of a twister in a twisting window-opening and drilling integrated steering device provided in an embodiment of the present invention;

[0030] Fig.12 It is a schematic structural diagram of a guide block in a torsion-type window-opening and drilling integrated steering device provided in an embodiment of the present invention.

[0031] Description of Figure Numbers:

[0032] 1. Connector; 11. Inner cylinder; 111. First reversing part; 112. Groove; 113. Connecting part; 114. Sealing ring groove; 12. Outer cylinder; 121. Second reversing part;

[0033] 2. Clamp; 21. First channel; 22. Second channel; 23. Third reversing portion; 24. Slot cavity; 25. Step-shaped cavity; 26. Cavity;

[0034] 3. Steering gear; 31. Window opening channel; 32. Drilling channel; 33. Interface pipe;

[0035] 4. twister; 41. reversing track; 42. protrusion structure;

[0036] 5. Twist the plug;

[0037] 6. Bottom plug;

[0038] 7. Guide block; 71. Guide surface; 72. Drainage channel. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] like Figures 1 to 4 As shown, the present invention provides a torsion-type window opening and drilling integrated steering device, which is used for underground window opening and steering drilling integrated construction operations, including a connector 1, a clamp 2, a steering device 3 and a twister 4, the connector 1 has an inner cylinder 11 and an outer cylinder 12 slidably sleeved outside the inner cylinder 11, a first reversing portion 111 is formed on the outer wall of the inner cylinder 11, a second reversing portion 121 is formed on the inner wall of the outer cylinder 12, and a torsion plug 5 for axially limiting the inner cylinder 11 is arranged between the outer cylinder 12 and the inner cylinder 11; the clamp 2 The holder 2 is connected to the inner cylinder 11, and is provided with a first channel 21, a second channel 22 and a third reversing portion 23. A groove 24 is provided in the middle of the holder 2. The diverter 3 is inserted into the groove 24 of the holder 2. The diverter 3 is provided with a window channel 31 and a drilling channel 32 which are not connected to each other. There is a preset phase angle between the outflow hole of the window channel 31 and the outflow hole of the drilling channel 32. The window channel 31 is connected to the inner cylinder 11 through the first channel 21, and the drilling channel 32 is connected to the inner cylinder 11 through the second channel 22. The twister 4 is connected to the clamp 2, and a reversing track 41 is provided on the twister 4, and the third reversing part 23 is placed in the reversing track 41; the twisting window drilling integrated steering device has a window opening operation state and a drilling operation state. In the window opening operation state, the drilling channel 32 is in a blocked state, and the jet fluid is ejected from the outlet of the window opening channel 31 to the window opening position; in the drilling operation state, the drilling channel 32 is in a conducting state, and the drilling pipe string extends from the outlet of the drilling channel 32 to the window opening position; the inner cylinder 11 can be operated by external torque. By rotating downward, the clamper 2 is driven to rotate and the third reversing part 23 is moved along the reversing track 41. When the third reversing part 23 climbs to the highest point of the reversing track 41, the first reversing part 111 is located above the second reversing part 121. When the third reversing part 23 descends along the reversing track 41, the first reversing part 111 passes over the second reversing part 121 and falls down, so that the clamper 2 drives the steering gear 3 to rotate through a preset phase angle, and the torsion-type window opening and drilling integrated steering device is switched from the window opening operation state to the drilling operation state. Among them, the first channel 21 is used for the passage of jet liquid. Since the jet intensity is mainly affected by the pressure of the jet liquid, the present application does not require the radial size of the first channel 21. An abrasive jet nozzle is installed at the outlet of the window channel 31 to ensure the jet window effect of the jet liquid; the second channel 22 is used for the passage of the drilling pipe, so the radial size of the second channel 22 is determined by the radial size of the drilling pipe to ensure that the drilling pipe can pass smoothly.

[0041] For details, please refer to Figures 5 to 12As shown, the inner tube 11 and the outer tube 12 are both hollow tubes, and a cylindrical torsion plug 5 is provided between the bottom of the outer tube 12 and the inner tube 11 to limit the axial position of the inner tube 11, thereby preventing the inner tube 11 from being separated from the outer tube 12. The clamp 2 is cylindrical as a whole, and a window is opened on the side of the middle to form an open groove cavity 24 for installing the diverter 3. The upper part of the clamp 2 is connected to the inner tube 11, and the lower part of the clamp 2 is connected to the torsion device 4, so that the inner tube 11, the clamp 2 and the diverter 3 form a whole. A stepped cavity 25 and a first channel 21 and a second channel 22 connected between the stepped cavity 25 and the groove cavity 24 are provided on the upper part of the clamp 2. When the diverter 3 is installed in the groove cavity 24, the diverter 3 and the clamp 2 cooperate to form a cylindrical structure. The first channel 21 is connected to the window channel 31, and the second channel 22 is connected to the drilling channel 32. In the window operation state, the jet liquid flows through the inner tube 11, the stepped cavity 25, the first channel 21 and the window channel 31 in sequence and then is ejected; in the drilling state, the drilling pipe string passes through the inner tube 11, the stepped cavity 25, the second channel 22 and the drilling channel 32 in sequence and then extends out. A first reversing portion 111 and a second reversing portion 121 are respectively provided on the surfaces of the inner cylinder 11 and the outer cylinder 12 that cooperate with each other, and a third reversing portion 23 is provided on the lower outer wall of the clamp 2. The inner cylinder 11 can be turned by ground torsion. Under the control of ground torsion, the whole formed by the inner cylinder 11, the clamp 2 and the diverter 3 starts to rotate relative to the outer cylinder 12, so that the third reversing portion 23 placed in the reversing track 41 climbs along the reversing track 41. When the third reversing portion 23 climbs over the highest point of the reversing track 41, the first reversing portion 111 passes over the second reversing portion 121, and then the third reversing portion 23 falls quickly. The diverter 3 completes the turning of the preset phase angle, so that the outflow hole of the drilling channel 32 is opposite to the window opening position. In this way, the torsion-type window opening and drilling integrated steering device completes the conversion from the window opening operation state to the drilling operation state. The connection method between the steering gear 3 and the clamp 2 can be welding, riveting, threaded connection or magnetic connection, etc., which is not limited in this application.

[0042] The window opening operation of the torsion-type window opening and drilling integrated steering device provided in the present application mainly utilizes abrasive jets to open windows, and the jet liquid ejected from the window opening channel 31 is directly opposite the window opening position, with good hole opening effect, high efficiency and large aperture; after the window opening is completed, it is only necessary to perform a twisting operation on the pipe string on the ground without any other control, so that the drilling channel 32 can be directly opposite the window opening position, thereby realizing the conversion of the device from the window opening operation state to the drilling operation state, and its operation is simple and easy to control on the well; the torsion-type window opening and drilling integrated steering device provided in the present application only needs the next pipe string to drill a radial branch underground, and through the coordination of up and down twisting, the whole process only needs to be driven by the ground once, and the switching from the window opening operation state to the drilling operation state can be realized underground, which has the beneficial effects of high switching success rate, simplified construction process, improved operation efficiency, and reduced economic cost and operation risk.

[0043] According to a preferred embodiment of the present invention, the reversing track 41 has a climbing track section and a descending track section. When the third reversing portion 23 climbs along the climbing track section, the first reversing portion 111 spirally rises and moves upward after contacting the second reversing portion 121. When the third reversing portion 23 climbs to the highest point of the climbing track section, the first reversing portion 111 moves above the second reversing portion 121. When the third reversing portion 23 enters the descending track section and moves downward, the first reversing portion 111 passes over the second reversing portion 121 and falls down. Specifically, as Figures 1 to 4 and Fig.11 As shown, the reversing track 41 is a circular track with staggered climbing track sections and descending track sections. After the twister 4 is connected with the clamp 2, the third reversing part 23 is placed on the reversing track 41. Under the ground twisting control, the whole formed by the inner cylinder 11, the clamp 2 and the diverter 3 starts to rotate relative to the outer cylinder 12, so that the third reversing part 23 climbs along the climbing track section. The first reversing part 111 spirally rises and is blocked by the second reversing part 121 after contacting the second reversing part 121. As the third reversing part 23 continues to climb along the climbing track section, the first reversing part 111 spirally rises and is blocked by the second reversing part 121 after contacting the second reversing part 121. When the first reversing part 111 climbs up, the first reversing part 111 moves upwards in the process of mechanical action such as collision and friction between the two. When the third reversing part 23 climbs to the highest point of the climbing track section, the first reversing part 111 moves to the top of the second reversing part 121, and then the third reversing part 23 enters the descending track section and moves downwards. The first reversing part 111 passes over the top of the second reversing part 121 and falls down, so that the diverter 3 completes the steering of the preset phase angle. At this time, the outflow hole of the drilling channel 32 is opposite to the window opening position, realizing the switching from the window opening operation state to the drilling operation state. In this embodiment, if Figure 7 and Fig.10 As shown, the preset phase angle between the outflow hole of the window channel 31 and the outflow hole of the drilling channel 32 is 90°, and four third reversing parts 23 are evenly spaced on the lower outer wall of the clamp 2. Correspondingly, the reversing track 41 has four climbing track segments and four descending track segments.

[0044] According to a preferred embodiment of the present invention, Figure 1 to Figure 2 , Figure 8 and Fig. 9 As shown, a cavity 26 is formed at the lower part of the clamp 2, and the twister 4 is sleeved in the cavity 26. A bottom plug 6 is provided between the clamp 2 and the twister 4 to limit the axial position of the twister 4. Specifically, as Fig.11 As shown, a protrusion structure 42 with a truncated cone-shaped cross-section is formed on the upper part of the twister 4. The twister 4 is sleeved in the cavity 26 of the clamp 2 through the protrusion structure 42, and the axial limitation of the twister 4 is achieved by the bottom plug 6 arranged between the clamp 2 and the twister 4 to prevent the twister 4 from escaping from the cavity 26.

[0045] According to a preferred embodiment of the present invention, the outer wall of the middle portion of the inner cylinder 11 extends radially inward to form a groove 112, a first reversing portion 111 is disposed in the groove 112, and a connecting portion 113 connected to the clamp 2 is formed at the lower portion of the inner cylinder 11. Specifically, as Figure 1 , Figure 2 and Figure 5 As shown, the middle outer wall of the inner cylinder 11 extends radially inward to form a groove 112, and the middle outer wall of the inner cylinder 11 is partially retained to form a first reversing portion 111 disposed in the groove 112. The lower portion of the inner cylinder 11 is a connecting portion 113 with a boss structure. When the inner cylinder 11 is transferred, the inner cylinder 11 and the clamp 2 are fixedly connected by the matching of the connecting portion 113 and the stepped cavity 25. When the inner cylinder 11 and the outer cylinder 12 are sleeved, the torsion plug 5 is placed on the connecting portion 113 and connected between the inner cylinder 11 and the outer cylinder 12.

[0046] According to a preferred embodiment of the present invention, along the axial direction of the inner tube 11, the length of the groove 112 is the same as the sum of the lengths of the first reversing portion 111 and the second reversing portion 121, so that during the torsion process, the first reversing portion 111 can pass over the second reversing portion 121, and then the third reversing portion 23 can fall quickly, so that the steering gear 3 can complete the steering of the preset phase angle, ensuring that the torsion-type window opening and drilling integrated steering device is converted from the window opening operation state to the drilling operation state.

[0047] According to a preferred embodiment of the present invention, along the radial direction of the inner tube 11, the sum of the thickness of the first reversing part 111 and the second reversing part 121 is greater than the depth of the groove 112. In this way, there is a large contact collision area between the first reversing part 111 and the second reversing part 121, so as to ensure that the first reversing part 111 and the second reversing part 121 have strong anti-deformation ability when extrusion collision occurs during the torsion process, prevent extrusion damage or abrasion, and then ensure that the second reversing part 121 effectively blocks the first reversing part 111, thereby ensuring the successful conversion of the operating state of the underground torsion type window drilling integrated steering device. Further, in order to ensure that the first reversing part 111 passes over the second reversing part 121 from above and then the third reversing part 23 falls quickly, the circumferential length of the groove 112 is not greater than the circumferential length of the highest point of the reversing track 41.

[0048] According to a preferred embodiment of the present invention, Figure 5 As shown, a plurality of sealing ring grooves 114 are arranged at intervals along the axial direction on the upper outer wall of the inner cylinder 11, and sealing rings are placed in the sealing ring grooves 114. Through the sealed connection between the inner cylinder 11 and the outer cylinder 12, the pressure loss of the jet liquid in the window opening operation state is reduced, the abrasive jet window opening effect is guaranteed, and at the same time, sand jamming can be avoided, thereby extending the service life of the device. Among them, the sealing ring is an O-type sealing ring. During assembly, the sealing ring is first installed in the sealing ring groove 114 on the upper part of the inner cylinder 11, and the torsion plug 5 is placed on the connecting portion 113, and then the outer cylinder 12 is sleeved on the outside of the inner cylinder 11.

[0049] According to a preferred embodiment of the present invention, Figure 1 and Figure 2 As shown, along the axial direction of the diverter 3, the window opening channel 31 extends in a straight line, and the drilling channel 32 extends in an arc. In this way, the pressure loss of the jetting fluid in the window opening operation state and the smooth running of the drilling string in the drilling operation state are taken into consideration.

[0050] According to one embodiment of the present invention, the holder 2 is embedded with a guide block 7, which is arranged below the connection between the holder 2 and the inner tube 11. The guide block 7 has a guide surface 71 inclined toward the second channel 22 and a drainage channel 72 connected between the first channel 21 and the inner tube 11. Specifically, Fig.12 As shown, the guide block 7 is arranged at the bottom of the stepped cavity 25 of the clamp 2. The guide block 7 is in a C-shape as a whole. For easy assembly, the narrow sides of the guide block 7 are arc-shaped. A guide surface 71 inclined toward the second channel 22 is formed inside the guide block 7 to guide the drilling pipe column to enter the drilling channel 32 quickly and smoothly during drilling operation. Fig.10 As shown, in order to facilitate the positioning and installation of the guide block 7, the diverter 3 is provided with an interface pipe 33 that matches the drainage channel 72 at the inlet of the window channel 31 thereof.

[0051] According to a preferred embodiment of the present invention, the torsional window drilling integrated steering device also includes a sealing ball for blocking the drilling channel 32. Specifically, during the window opening operation, after the sealing ball is put into the connector 1, it is guided along the guide surface 71 to reach and stay at the entrance of the drilling channel 32 to achieve effective blocking of the drilling channel 32, so that all the jet liquid entering the inner cylinder 11 flows along the drainage channel 72 to the window opening channel 31. Preferably, the second channel 22 is a stepped countersunk hole, that is, along the drilling direction, the second channel 22 has a conical section and a constant diameter section with a reduced channel cross-section, and the size of the sealing ball is adapted to the maximum radial size of the conical section of the second channel 22 to achieve sealing and blocking of the drilling channel 32.

[0052] Another object of the present invention is to provide an operation method of a torsion-type window-opening drilling integrated steering device, which is implemented by the above torsion-type window-opening drilling integrated steering device, including: positioning, lowering the torsion-type window-opening drilling integrated steering device to the target layer through the oil pipe, and aligning the outlet hole of the window-opening channel 31 with the window-opening position; window-opening operation, after the positioning is completed, inserting a plugging ball to block the drilling channel 32, and then injecting fluid into the oil pipe pump, so that the jet liquid is sprayed from the outlet hole of the window-opening channel 31 to the window-opening position; drilling operation, after the window-opening operation is completed, stop pumping fluid injection, wait for the jet liquid and the plugging ball to return, twist the pipe string, align the outlet hole of the drilling channel 32 with the window-opening position, and then lower the drilling pipe string into the oil pipe. In this way, drilling a radial branch underground only requires the next pipe string, and switching from the window-opening operation state to the drilling operation state is realized underground, which has the beneficial effects of simplifying the construction process, improving operation efficiency, and reducing economic costs and operation risks.

[0053] When the window opening operation is carried out, the torsion-type window opening and drilling integrated steering device is fixedly installed on the oil pipe through the inner cylinder 11, and the torsion-type window opening and drilling integrated steering device is lowered to the target layer through the oil pipe, and the outlet hole of the window opening channel 31 is aligned with the position where the casing needs to open a window (window opening position) to complete the positioning; a sealing ball is thrown into the oil pipe, and after passing through the inner cylinder 11, the sealing ball is accurately guided to the entrance of the drilling channel 32 by the guide surface 71 of the guide block 7, so as to achieve effective blocking of the drilling channel 32; then, the fluid is injected into the oil pipe pump from the ground, and is sprayed to the window opening position in the form of an abrasive jet through the abrasive jet nozzle installed at the outlet hole of the window opening channel 31, so as to complete the window opening operation at the target position of the casing.

[0054] When the window opening operation is completed, the ground pump injection fluid is stopped and the jet fluid is returned. After the jet fluid and the plugging ball are returned, the ground twisting operation is started. The pipe string is twisted by the workover rig. At this time, the torque is transmitted from the inner tube 11 to the clamp 2, so that the third reversing part 23 moves along the reversing track 41 and enters the climbing track section of the reversing track 41 to climb. Under the guidance of the reversing track 41, the clamp 2 and the diverter 3 start to rotate; when the first reversing part 111 on the inner tube 11 passes over the second reversing part 12 on the outer tube 12 1, the third reversing part 23 moves downward rapidly and enters the descending track section of the reversing track 41. When it continues to be lowered, under the guidance of the reversing track 41, the clamp 2 drives the steering gear 3 to rotate through the preset phase angle, completing the switching of the torsion-type window-opening and drilling integrated steering device from the window-opening operation state (the outflow hole of the window-opening channel 31 is aligned with the window-opening position) to the drilling operation state (the outflow hole of the drilling channel 32 is aligned with the window-opening position); after the outflow hole of the drilling channel 32 is aligned with the window-opening position, the drilling string is lowered into the oil pipe for drilling operation. After the drilling operation is completed, the string is taken out, and the inner tube 11 is controlled to idle to return the torsion-type window-opening and drilling integrated steering device to the initial state.

[0055] Based on the above description, the torsion-type window-opening and drilling integrated steering device provided in the embodiment of the present invention has the following features:

[0056] Beneficial effects:

[0057] The window opening operation of the torsion-type window opening and drilling integrated steering device provided in the embodiment of the present invention mainly utilizes abrasive jets to open windows, and the jet liquid ejected from the window opening channel 31 is directly opposite to the window opening position, with good hole opening effect, high efficiency and large aperture; after the window opening is completed, it is only necessary to perform a twisting operation on the pipe string on the ground without any other control, so that the drilling channel 32 can be directly opposite to the window opening position, thereby realizing the conversion of the device from the window opening operation state to the drilling operation state, and its operation is simple and easy to control on the well; the torsion-type window opening and drilling integrated steering device provided in the present application only needs the next pipe string to drill a radial branch underground, and through the coordination of up and down twisting, the whole process only needs to be driven once on the ground, and can be realized underground The switching from the window opening operation state to the drilling operation state has the beneficial effects of high switching success rate, simplified construction process, improved operation efficiency, reduced economic cost and operation risk; by setting a window opening channel 31 extending in a straight line along the axial direction of the diverter 3 and a drilling channel 32 extending in an arc shape, it is possible to take into account both reducing the pressure loss of the jet liquid in the window opening operation state and smoothly lowering the drilling pipe in the drilling operation state; and setting a guide block 7 with a guide surface 71 inclined toward the second channel 22, so as to facilitate guiding the drilling pipe to quickly and smoothly enter the drilling channel 32 during the drilling operation, and at the same time facilitate the correct guidance of the blocking ball into place during the window opening operation, so as to achieve effective blocking of the drilling channel 32.

[0058] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A torsion-type integrated window opening and drilling steering device, used for underground window opening and steering drilling integrated construction operations, characterized in that: include: A connector, comprising an inner cylinder and an outer cylinder slidably sleeved outside the inner cylinder, a first reversing portion being formed on the outer wall of the inner cylinder, a second reversing portion being formed on the inner wall of the outer cylinder, and a torsion plug being provided between the outer cylinder and the inner cylinder for axially limiting the inner cylinder; A holder connected to the inner cylinder, the holder is provided with a first channel, a second channel and a third reversing portion, and a groove cavity is provided in the middle of the holder; a diverter, which is inserted into the groove cavity, wherein a window channel and a drilling channel which are not connected to each other are provided in the diverter, a flow outlet of the window channel and a flow outlet of the drilling channel have a preset phase angle, the window channel is connected to the inner cylinder through the first channel, and the drilling channel is connected to the inner cylinder through the second channel; A twister connected to the clamper, the twister is provided with a reversing track, and the third reversing part is placed in the reversing track; The twisted window-opening and drilling integrated steering device has a window-opening operation state and a drilling operation state. In the window-opening operation state, the drilling channel is in a blocked state, and the jet fluid jets from the outlet of the window-opening channel to the window-opening position; in the drilling operation state, the drilling channel is in a conducting state, and the drilling pipe string extends from the outlet of the drilling channel to the window-opening position; The inner cylinder can rotate under the action of external torque, driving the clamp to rotate and causing the third reversing part to move along the reversing track. When the third reversing part climbs to the highest point of the reversing track, the first reversing part is located above the second reversing part. When the third reversing part descends along the reversing track, the first reversing part passes over the second reversing part and falls down, causing the clamp to drive the steering gear to rotate through the preset phase angle, and the torsion-type window opening and drilling integrated steering device switches from the window opening operation state to the drilling operation state.

2. The torsion-type window-opening and drilling integrated steering device according to claim 1, characterized in that: A guide block is embedded in the clamp, and the guide block is arranged below the connection between the clamp and the inner tube. The guide block has a guide surface inclined toward the second channel, and a drainage channel connected between the first channel and the inner tube.

3. The torsion-type window-opening and drilling integrated steering device according to claim 1 or 2, characterized in that: The outer wall of the middle part of the inner cylinder extends radially inward to form a groove, the first reversing part is arranged in the groove, and the lower part of the inner cylinder forms a connecting part connected to the clamper.

4. The torsion-type window-opening and drilling integrated steering device according to claim 3, characterized in that: Along the axial direction of the inner cylinder, the length of the groove is equal to the sum of the lengths of the first direction-changing portion and the second direction-changing portion.

5. The torsion-type window-opening and drilling integrated steering device according to claim 4, characterized in that: Along the radial direction of the inner cylinder, the sum of the thicknesses of the first direction-changing portion and the second direction-changing portion is greater than the depth of the groove.

6. The torsion-type window-opening and drilling integrated steering device according to claim 1, characterized in that: The reversing track has a climbing track segment and a descending track segment. When the third reversing part climbs along the climbing track segment, the first reversing part spirally rises and moves upward after contacting the second reversing part. When the third reversing part climbs to the highest point of the climbing track segment, the first reversing part moves to the top of the second reversing part. When the third reversing part enters the descending track segment and moves downward, the first reversing part passes over the top of the second reversing part and falls down.

7. The torsion-type window-opening and drilling integrated steering device according to claim 1, characterized in that: Along the axial direction of the diverter, the window opening channel extends in a straight line, and the drilling channel extends in an arc line.

8. The twisting window drilling integrated steering device according to claim 1, characterized in that: A cavity is formed at the lower part of the clamp, and the twister is sleeved in the cavity. A bottom plug is arranged between the clamp and the twister to limit the axial position of the twister.

9. The torsion-type window-opening and drilling integrated steering device according to claim 1, characterized in that: The torsion-type window-opening and drilling integrated steering device also includes a blocking ball for blocking the drilling channel.

10. An operating method of a twisting window drilling integrated steering device, characterized in that: The operation method of the twisted window drilling integrated steering device is implemented by the twisted window drilling integrated steering device as claimed in claim 9, comprising: Positioning: lowering the torsion-type window drilling integrated steering device into the target layer through the oil pipe, and aligning the outflow hole of the window channel with the window position; After the window opening operation is completed, the sealing ball is put into the drilling channel to seal it, and then the fluid is injected into the oil pipe pump so that the jet fluid is sprayed from the outlet hole of the window opening channel to the window opening position; During the drilling operation, after the window opening operation is completed, the pump injection fluid is stopped and the jet fluid is returned. After the jet fluid and the sealing ball are returned, the pipe string is twisted to align the outflow hole of the drilling channel with the window opening position, and then the drilling pipe string is lowered into the oil pipe.

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