Twist window drilling integrated steering device and its operation method

Abstract

The application discloses a torsion type windowing drilling integrated steering device and a working method thereof. The device comprises a connector, a holder, a steering device and a torsion device. The connector has an inner cylinder and an outer cylinder which is sleeved on the outer cylinder. 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 is arranged between the outer cylinder and the inner cylinder to axially limit the inner cylinder. The holder is connected with the inner cylinder, and the holder is provided with a first channel, a second channel and a third reversing part. A groove is arranged in the middle of the holder. The steering device is arranged in the groove, and the steering device is provided with a windowing channel and a drilling channel which are not communicated with each other and have a preset phase angle between the outlet holes of the two channels. The windowing channel and the drilling channel are communicated with the inner cylinder through the first channel and the second channel respectively. The torsion device is connected with the holder, and the torsion device is provided with a reversing track. The third reversing part is arranged in the reversing track. The application can realize the integrated operation of downhole windowing and drilling.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling equipment technology, and in particular to a torsion-type window-opening drilling integrated steering device and its operation method. Background Technology

[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 from a vertical wellbore under ultra-short radius conditions (i.e., radius less than or equal to 300 mm). This creates a three-dimensional oil and gas migration network in the reservoir, characterized by "one layer, multiple branches, and multiple layers per well," which can greatly improve oil and gas migration efficiency and increase single-well production. Furthermore, ultra-short radius sidetracking horizontal well drilling technology has excellent application prospects for the exploitation of remaining oil and gas in undepleted oilfield areas and the development of unconventional oil and gas fields. Therefore, the development of the steering device is the core challenge of this technology.

[0003] Currently, although steering devices have solved the problems of reversing direction and turning within the casing under ultra-short radius conditions, there are still problems such as the large friction loss of the steering track, which limits the hydraulic power transmitted to the well, thus making it difficult to open the casing window. There are also problems such as low efficiency, high cost, and poor hole opening effect caused by the need to run the tubing string twice for opening the window and drilling operations. There are also problems such as the consumption of the steering device's self-advancement force. Therefore, the 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 this invention is to provide a torsion-type integrated drilling and steering device and its operation method, which at least solves the problems of difficult casing opening and low drilling efficiency in the existing steering devices during downhole window opening and integrated steering drilling operations.

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

[0006] This invention provides a torsion-type integrated window-opening and drilling steering device for integrated downhole window-opening and steering drilling operations. It includes: a connector having an inner cylinder and an outer cylinder slidably fitted around the inner cylinder; a first reversing portion formed on the outer wall of the inner cylinder, and a second reversing portion formed on the inner wall of the outer cylinder; a torsion plug for axially limiting the inner cylinder provided between the outer cylinder and the inner cylinder; a clamp connected to the inner cylinder, the clamp having a first channel, a second channel, and a third reversing portion, and a groove in the middle of the clamp; a steering device passing through the groove, the steering device having a window-opening channel and a drilling channel that are not interconnected; a preset phase angle between the outlet of the window-opening channel and the outlet of the drilling channel; the window-opening channel communicating with the inner cylinder through the first channel, and the drilling channel communicating with the inner cylinder through the second channel; and a torsion device connected to the clamp, the torsion device having a reversing track. The third reversing part is placed in the reversing track; the torsion-type window-opening 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 is ejected from the outlet of the window-opening channel to the window position; in the drilling operation state, the drilling channel is in a conducting state, and the drilling string extends from the outlet of the drilling channel to the window 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 and falls from above the second reversing part, causing the clamp to drive the steering device to turn through the preset phase angle, and the torsion-type window-opening drilling integrated steering device switches from the window-opening operation state to the drilling operation state.

[0007] Furthermore, the clamp is embedded with a guide block, which is located below the connection between the clamp and the inner cylinder. The guide block has a guide surface inclined toward the second channel and a drainage channel connecting the first channel and the inner cylinder.

[0008] Specifically, the outer wall of the middle part of the inner cylinder extends radially inward to form a groove, and the first reversing part is provided in the groove. The lower part of the inner cylinder forms a connecting part that is connected to the clamp.

[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 reversing portion and the second reversing portion is greater than the depth of the groove.

[0011] Preferably, the reversing track has an ascending track section and a descending track section. When the third reversing part ascends along the ascending track section, the first reversing part spirals upward and moves upward after contacting the second reversing part. When the third reversing part ascends to the highest point of the ascending track section, the first reversing part moves above the second reversing part. When the third reversing part enters the descending track section and moves downward, the first reversing part falls over the second reversing part.

[0012] Preferably, the upper outer wall of the inner cylinder is provided with a plurality of sealing ring grooves arranged at intervals along its axial direction, and the sealing ring grooves contain sealing rings.

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

[0014] Preferably, the lower part of the clamp forms a cavity, the torsion device is sleeved in the cavity, and a bottom plug is provided between the clamp and the torsion device to limit the torsion device axially.

[0015] Preferably, the torsion-type window-opening drilling integrated steering device further includes a sealing ball for sealing the drilling channel.

[0016] Another objective of this invention is to provide an operating method for a torsion-type integrated window-opening drilling and steering device. This method utilizes the torsion-type integrated window-opening drilling and steering device as described above, and includes: positioning, lowering the torsion-type integrated window-opening drilling and steering device to the target formation via tubing, and aligning the outlet of the window-opening channel with the window-opening position; window-opening operation, after positioning is completed, inserting a plugging ball to plug the drilling channel, and then injecting fluid into the tubing pump, causing the jet fluid to spray from the outlet of the window-opening channel to the window-opening position; drilling operation, after the window-opening operation is completed, stopping the injection of the jet fluid, performing jet fluid backflow, and after the jet fluid and the plugging ball have backflowed, performing a torsion operation on the tubing string to align the outlet of the drilling channel with the window-opening position, and then lowering the drilling tubing string into the tubing.

[0017] The features and advantages of this invention are as follows: The window opening operation of the torsion-type window opening and drilling integrated steering device provided in this application mainly utilizes abrasive jets for window opening. The jet fluid sprayed from the window opening channel is directly aligned with the window opening position, resulting in good opening effect, high efficiency, and large orifice diameter. After window opening, only a torsion operation on the tubing string on the ground is required, without any other control, to align the drilling channel with the window opening position, realizing the conversion of the device from window opening operation state to drilling operation state. Its operation is simple and easy to control from the well. The torsion-type window opening and drilling integrated steering device provided in this application only requires one tubing string to be lowered when drilling a radial branch downhole. Through the coordination of upper and lower torsion, the entire process only requires one ground drive, which can realize the switch from window opening operation state to drilling operation state downhole. It has the beneficial effects of high success rate of switching, simplified construction process, improved operation efficiency, and reduced economic cost and operation risk. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the integrated torsion-type window-opening drilling steering device provided in the embodiment of the present invention in the window-opening operation state;

[0020] Figure 2 This is a schematic diagram of the integrated torsion-type window-opening drilling steering device provided in the embodiment of the present invention during drilling operations.

[0021] Figure 3 This is a schematic diagram of the state structure of the integrated twisting and drilling device for opening windows provided in this embodiment of the invention before performing a twisting operation;

[0022] Figure 4 This is a schematic diagram of the state structure of the integrated twisting and drilling device for opening windows provided in the embodiment of the present invention during twisting operation;

[0023] Figure 5 This is a schematic diagram of the inner cylinder structure of the connector in the torsion-type window-opening drilling integrated steering device provided in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the outer cylinder structure of the connector in the torsion-type window-opening drilling integrated steering device provided in the embodiment of the present invention;

[0025] Figure 7This is a schematic diagram of the clamp in the integrated twist-type window drilling steering device provided in the embodiment of the present invention;

[0026] Figure 8 for Figure 7 A schematic diagram of the AA cross-section;

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

[0028] Figure 10 This is a schematic diagram of the steering gear in the integrated steering device for twist-type window drilling provided in an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the torsion device in the integrated torsion-type window drilling steering device provided in the embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the guide block in the integrated torsion-type window drilling steering device provided in an embodiment of the present invention.

[0031] Explanation of icon 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 part; 24. Groove; 25. Stepped cavity; 26. Cavity;

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

[0035] 4. Torque generator; 41. Reversing track; 42. Protruding structure;

[0036] 5. Twist the plug;

[0037] 6. Bottom plug;

[0038] 7. Guide block; 71. Guide surface; 72. Drainage channel. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 4 As shown, this invention provides a torsion-type integrated window-opening and drilling steering device for integrated downhole window-opening and steering drilling operations. It includes a connector 1, a clamp 2, a steering device 3, and a torsion device 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, and a second reversing portion 121 is formed on the inner wall of the outer cylinder 12. A torsion plug 5 for axially limiting the inner cylinder 11 is provided between the outer cylinder 12 and the inner cylinder 11. The clamp 2... The clamp 2 is connected to the inner cylinder 11 and is provided with a first channel 21, a second channel 22 and a third reversing part 23. A groove 24 is provided in the middle of the clamp 2. The deflector 3 is inserted into the groove 24 of the clamp 2. The deflector 3 is provided with a window opening channel 31 and a drilling channel 32 that are not connected to each other. There is a preset phase angle between the outlet hole of the window opening channel 31 and the outlet hole of the drilling channel 32. The window opening 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 torsion device 4 is connected to the clamp 2. A reversing rail 41 is provided on the torsion device 4, and the third reversing part 23 is placed in the reversing rail 41. The torsion-type integrated window-opening drilling 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 conductive state, and the drilling string extends from the outlet of the drilling channel 32 to the window-opening position. The inner cylinder 11 can be subjected to external torque. The downward rotation drives the gripper 2 to rotate and causes the third reversing part 23 to move 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 and falls from above the second reversing part 121, causing the gripper 2 to drive the steering device 3 to turn through a preset phase angle. The torsion-type window opening and drilling integrated steering device switches from the window opening operation state to the drilling operation state. The first channel 21 is used for the jet fluid to pass through. Since the jet intensity is mainly affected by the pressure of the jet fluid, this application does not require the radial dimension of the first channel 21. An abrasive jet nozzle is installed at the outlet of the window channel 31 to ensure the jet windowing effect of the jet fluid. The second channel 22 is used for the drilling string to pass through. Therefore, the radial dimension of the second channel 22 is determined by the radial dimension of the drilling string to ensure that the drilling string can pass through smoothly.

[0041] For details, please refer to the following: Figures 5 to 12As shown, both the inner cylinder 11 and the outer cylinder 12 are hollow tubes. A cylindrical torsion plug 5 is provided between the bottom of the outer cylinder 12 and the inner cylinder 11 to axially limit the inner cylinder 11, thereby preventing the inner cylinder 11 from detaching from the outer cylinder 12. The clamp 2 is cylindrical in shape, with an open slot 24 formed by a window on its middle side for installing the steering device 3. The upper part of the clamp 2 is connected to the inner cylinder 11, and the lower part of the clamp 2 is connected to the torsion device 4, so that the inner cylinder 11, the clamp 2, and the steering device 3 form a whole. The upper part of the clamp 2 is provided with a stepped cavity 25 and a first channel 21 and a second channel 22 connecting the stepped cavity 25 and the slot 24. When the deflector 3 is installed in the slot 24, the deflector 3 and the clamp 2 cooperate to form a cylindrical structure. The first channel 21 is connected to the window opening channel 31, and the second channel 22 is connected to the drilling channel 32. In the window opening operation state, the jet fluid flows through the inner cylinder 11, the stepped cavity 25, the first channel 21 and the window opening channel 31 in sequence and then sprays out. In the drilling state, the drilling string extends out after passing through the inner cylinder 11, the stepped cavity 25, the second channel 22 and the drilling channel 32 in sequence. The inner cylinder 11 and the outer cylinder 12 are respectively provided with a first reversing part 111 and a second reversing part 121 on their mating surfaces. A third reversing part 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 steering device 3 starts to rotate relative to the outer cylinder 12, so that the third reversing part 23 placed in the reversing track 41 climbs along the reversing track 41. When the third reversing part 23 climbs past the highest point of the reversing track 41, the first reversing part 111 passes over the second reversing part 121. Then the third reversing part 23 falls quickly. The steering device 3 completes the turn of the preset phase angle, so that the outlet hole of the drilling channel 32 is directly opposite the window opening position. In this way, the torsion type window opening 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., and this application does not limit it.

[0042] The torsion-type integrated drilling and steering device provided in this application mainly utilizes abrasive jets for window opening. The jet fluid ejected from the window opening channel 31 is directly aligned with the window opening position, resulting in good opening effect, high efficiency, and large orifice diameter. After window opening, only a torsion operation on the tubing string on the ground is required, without any other control, to align the drilling channel 32 with the window opening position, realizing the conversion of the device from window opening operation state to drilling operation state. Its operation is simple and easy to control from the well. The torsion-type integrated drilling and steering device provided in this application only requires one tubing string to be lowered when drilling a radial branch downhole. Through the coordination of upper and lower torsion, the entire process only requires one ground drive to achieve the switch from window opening operation state to drilling operation state downhole. It has the beneficial effects of high success rate of switching, 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 an ascending track section and a descending track section. When the third reversing part 23 ascends along the ascending track section, the first reversing part 111 spirals upward and moves upward after contacting the second reversing part 121. When the third reversing part 23 ascends to the highest point of the ascending track section, the first reversing part 111 moves above the second reversing part 121. When the third reversing part 23 enters the descending track section and moves downward, the first reversing part 111 passes over the second reversing part 121 and falls. Specifically, as shown... Figures 1 to 4 and Figure 11 As shown, the reversing track 41 is a circular track with staggered climbing and descending sections. After the torsion device 4 is connected to the clamp 2, the third reversing part 23 is placed on the reversing track 41. Under ground torsion control, the inner cylinder 11, clamp 2, and steering device 3 form a whole that begins to rotate relative to the outer cylinder 12, causing the third reversing part 23 to climb along the climbing section. The first reversing part 111 spirals upward and is blocked by the second reversing part 121 after contacting it. As the third reversing part 23 continues to climb along the climbing section... During the ascent, the first reversing part 111 moves upward through mechanical actions 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 above the second reversing part 121. Subsequently, the third reversing part 23 enters the descending track section and moves downward. The first reversing part 111 passes over the second reversing part 121 and falls, causing the steering device 3 to complete the steering at a preset phase angle. At this time, the outlet of the drilling channel 32 is directly opposite the window opening position, realizing the switch from the window opening operation state to the drilling operation state. In this embodiment, as... Figure 7 and Figure 10 As shown, the preset phase angle between the outlet hole of the window channel 31 and the outlet hole of the drilling channel 32 is 90°. Four third reversing parts 23 are evenly distributed on the lower outer wall of the clamp 2. Correspondingly, the reversing track 41 has four climbing track sections and four descending track sections.

[0044] According to a preferred embodiment of the present invention, such as Figures 1 to 2 , Figure 8 and Figure 9 As shown, the lower part of the clamp 2 forms a cavity 26, and a torsion device 4 is sleeved inside the cavity 26. A bottom plug 6 is provided between the clamp 2 and the torsion device 4 to axially limit the torsion device 4. Specifically, as... Figure 11 As shown, the upper part of the torsion device 4 has a protruding structure 42 with a frustum cross-section. The torsion device 4 is sleeved in the cavity 26 of the clamp 2 through the protruding structure 42. The bottom plug 6 provided between the clamp 2 and the torsion device 4 is used to limit the axial movement of the torsion device 4 to prevent the torsion device 4 from detaching from the cavity 26.

[0045] According to a preferred embodiment of the present invention, a groove 112 is formed by extending radially inward from the outer wall of the middle portion of the inner cylinder 11. A first reversing portion 111 is provided in the groove 112, and a connecting portion 113 connected to the clamp 2 is formed in the lower portion of the inner cylinder 11. Specifically, as shown... Figure 1 , Figure 2 and Figure 5 As shown, the outer wall of the inner cylinder 11 extends radially inward to form a groove 112. A portion of the outer wall of the inner cylinder 11 retains a first reversing portion 111 disposed within the groove 112. The lower part of the inner cylinder 11 is a connecting portion 113 with a boss structure. During assembly, the inner cylinder 11 and the clamp 2 are fixedly connected through the cooperation of the connecting portion 113 and the stepped cavity 25. When the inner cylinder 11 is fitted onto the outer cylinder 12, a 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 cylinder 11, the length of the groove 112 is the same as the sum of the lengths of the first reversing part 111 and the second reversing part 121, so that during the torsion process, the first reversing part 111 can pass over the second reversing part 121, and then the third reversing part 23 can fall quickly, so that the steering device 3 completes the steering at a preset phase angle, ensuring that the torsion-type window-opening drilling integrated steering device is switched 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 cylinder 11, the sum of the thicknesses of the first reversing portion 111 and the second reversing portion 121 is greater than the depth of the groove 112. This ensures a larger contact area between the first reversing portion 111 and the second reversing portion 121, guaranteeing strong resistance to deformation during the compression collisions during torsion, preventing compression damage or detachment, and thus ensuring effective blocking of the first reversing portion 111 by the second reversing portion 121, thereby ensuring successful transition of the downhole torsion-type window-opening drilling integrated steering device into operation. Furthermore, to ensure the rapid descent of the third reversing portion 23 after the first reversing portion 111 passes over the second reversing portion 121, the circumferential length of the groove 112 is not greater than the circumferential length at the highest point of the reversing track 41.

[0048] According to a preferred embodiment of the present invention, such as Figure 5 As shown, the upper outer wall of the inner cylinder 11 has multiple sealing ring grooves 114 spaced apart along its axis, and sealing rings are placed inside the sealing ring grooves 114. The sealed connection between the inner cylinder 11 and the outer cylinder 12 reduces the pressure loss of the jet fluid during window opening operations, ensuring the window opening effect of the abrasive jet, while also preventing sand jamming and extending the service life of the device. The sealing rings are O-rings. During assembly, the sealing rings are first installed in the sealing ring grooves 114 on the upper part of the inner cylinder 11, and the torsion plug 5 is placed on the connecting part 113. Then, the outer cylinder 12 is fitted onto the outer cylinder 11.

[0049] According to a preferred embodiment of the present invention, such as Figure 1 and Figure 2 As shown, along the axis of the steering gear 3, the window opening channel 31 extends in a straight line, while the drilling channel 32 extends in an arc. This is to balance reducing the pressure loss of the jet fluid during window opening operations with ensuring smooth lowering of the drill string during drilling operations.

[0050] According to one embodiment of the present invention, a guide block 7 is embedded in the clamp 2. The guide block 7 is disposed below the connection between the clamp 2 and the inner cylinder 11. The guide block 7 has a guide surface 71 inclined toward the second channel 22 and a drainage channel 72 communicating between the first channel 21 and the inner cylinder 11. Specifically, as shown... Figure 12 As shown, the guide block 7 is located at the bottom of the stepped cavity 25 of the clamp 2. The guide block 7 is C-shaped overall. For ease of assembly, the narrow sides of the guide block 7 are arc-shaped. The guide block 7 has a guide surface 71 that is inclined towards the second channel 22 inside, which is used to guide the drill string into the drill channel 32 quickly and smoothly during drilling operations. Figure 10 As shown, in order to facilitate the positioning and installation of the guide block 7, the steering gear 3 is provided with an interface pipe 33 that cooperates with the diversion channel 72 at the inlet of its window channel 31.

[0051] According to a preferred embodiment of the present invention, the torsion-type window-opening drilling integrated steering device further includes a sealing ball for sealing the drilling channel 32. Specifically, during window opening operations, after the sealing ball is inserted into the connector 1, it is guided along the guide surface 71 to reach and remain at the entrance of the drilling channel 32, thereby effectively sealing the drilling channel 32 and ensuring that all the jet fluid 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 truncated cone section and a constant diameter section with a reduced channel cross-section. The size of the sealing ball is adapted to the maximum radial dimension of the truncated cone section of the second channel 22 to achieve sealing of the drilling channel 32.

[0052] Another objective of this invention is to provide an operating method for a torsion-type integrated drilling and steering device with window opening. The operating method utilizes the aforementioned torsion-type integrated drilling and steering device and includes: positioning, where the torsion-type integrated drilling and steering device with window opening channel 31 is lowered into the target formation via tubing, and the outlet hole of the window opening channel 31 is aligned with the window opening position; window opening operation, after positioning is completed, a plugging ball is inserted to plug the drilling channel 32, and then fluid is injected into the tubing pump, causing the jet fluid to spray from the outlet hole of the window opening channel 31 to the window opening position; drilling operation, after the window opening operation is completed, the pump injection is stopped, and after the jet fluid and plugging ball are returned, the tubing string is torsion-operated to align the outlet hole of the drilling channel 32 with the window opening position, and then the drilling string is lowered into the tubing. Thus, drilling a radial branch downhole only requires one tubing string insertion, achieving a switch from window opening operation to drilling operation downhole, which has the beneficial effects of simplifying the construction process, improving operational efficiency, and reducing economic costs and operational risks.

[0053] When performing window opening operations, the torsion-type window opening drilling integrated steering device is fixedly installed on the tubing through the inner cylinder 11. The torsion-type window opening drilling integrated steering device is lowered to the target layer through the tubing, and the outlet hole of the window opening channel 31 is aligned with the position (window opening position) of the casing to be opened, thus completing the positioning. A sealing ball is dropped into the tubing. After passing through the inner cylinder 11, the sealing ball is accurately guided by the guide surface 71 of the guide block 7 to the entrance of the drilling channel 32, thereby effectively sealing the drilling channel 32. Subsequently, fluid is pumped from the ground to the tubing and sprayed into the window opening position in the form of an 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] After the window opening operation is completed, the surface pump injection is stopped, and the jet fluid is returned. After the jet fluid and the plugging ball are returned, the surface torsion operation begins. The tubing string is torsioned by the workover rig. At this time, the torque is transmitted from the inner cylinder 11 to the gripper 2, causing the third reversing part 23 to move along the reversing track 41 and enter the climbing section of the reversing track 41. Under the guidance of the reversing track 41, the gripper 2 and the steering gear 3 begin to rotate. When the first reversing part 111 on the inner cylinder 11 passes the second reversing part 12 on the outer cylinder 12... After step 1, the third reversing unit 23 moves rapidly downwards, entering the descending section of the reversing track 41. As it continues to descend, guided by the reversing track 41, the clamp 2 drives the steering unit 3 to rotate through a preset phase angle, completing the switch of the torsional window-opening drilling integrated steering device from the window-opening operation state (the outlet hole of the window-opening channel 31 aligns with the window-opening position) to the drilling operation state (the outlet hole of the drilling channel 32 aligns with the window-opening position). After the outlet hole of the drilling channel 32 aligns with the window-opening position, the drilling string is lowered into the tubing for drilling operations. After the drilling operation is completed, the string is removed, and controlling the inner cylinder 11 to idle allows the torsional window-opening drilling integrated steering device to return to its initial state.

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

[0056] Beneficial effects:

[0057] The window-opening operation of the integrated drilling and steering device with twisting mechanism provided in this embodiment of the invention mainly utilizes abrasive jet for window opening. The jet fluid ejected from the window opening channel 31 is directly aligned with the window opening position, resulting in good opening effect, high efficiency, and large orifice diameter. After window opening, only a twisting operation on the tubing string on the ground is required, without any other control, to align the drilling channel 32 with the window opening position, realizing the conversion of the device from window opening operation state to drilling operation state. Its operation is simple and easy to control from the well. The integrated drilling and steering device with twisting mechanism provided in this application only requires one tubing string insertion to drill a radial branch downhole. Through the coordinated upper and lower twisting, the entire process only requires one ground drive, which can be achieved downhole. The switching from the window opening operation state to the drilling operation state has the beneficial effects of high success rate of switching, simplified construction process, improved operation efficiency, and reduced economic costs and operation risks. By setting the window opening channel 31 extending in a straight line along the axis of the steering gear 3 and the drilling channel 32 extending in an arc shape, the pressure loss of the jet fluid in the window opening operation state and the smooth entry of the drilling string in the drilling operation state are balanced. Furthermore, a guide block 7 with the guide surface 71 inclined towards the second channel 22 is set to facilitate the rapid and smooth entry of the drilling string into the drilling channel 32 during the drilling operation, and at the same time, it is convenient to guide the sealing ball into place correctly during the window opening operation to achieve effective sealing of the drilling channel 32.

[0058] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content 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 steering device for integrated downhole window-opening and steering drilling operations, characterized in that, include: A connector has an inner cylinder and an outer cylinder that is slidably sleeved outside the inner cylinder. A first reversing portion is formed on the outer wall of the inner cylinder, and a second reversing portion is formed on the inner wall of the outer cylinder. A torsion plug for axially limiting the inner cylinder is provided between the outer cylinder and the inner cylinder. A clamp is connected to the inner cylinder. The clamp is provided with a first channel, a second channel and a third reversing part, and a groove is provided in the middle of the clamp. A steering mechanism is installed in the groove cavity. The steering mechanism has a window opening channel and a drilling channel that are not connected to each other. There is a preset phase angle between the outlet hole of the window opening channel and the outlet hole of the drilling channel. The window opening 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 torsion device is connected to the clamp, and the torsion device is provided with a reversing track, with the third reversing part placed in the reversing track; The torsion-type integrated steering device for window opening and drilling 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 is jetted from the outlet of the window opening channel to the window opening position. In the drilling operation state, the drilling channel is in a conductive state, and the drilling 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, which drives the clamp to rotate and causes 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 and falls from above the second reversing part, causing the clamp to drive the steering gear to turn through the preset phase angle. The torsion-type window opening and drilling integrated steering device switches from the window opening operation state to the drilling operation state. The outer wall of the inner cylinder extends radially inward to form a groove, and the first reversing part is provided in the groove. The lower part of the inner cylinder forms a connecting part that is connected to the clamp. 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 part and the second reversing part. The reversing track has an ascending track section and a descending track section. When the third reversing part ascends along the ascending track section, the first reversing part spirals upward and moves upward after contacting the second reversing part. When the third reversing part ascends to the highest point of the ascending track section, the first reversing part moves above the second reversing part. When the third reversing part enters the descending track section and moves downward, the first reversing part falls over the second reversing part. Along the axial direction of the steering mechanism, the window opening channel extends in a straight line, and the drilling channel extends in an arc shape.

2. The integrated steering device for twist-type window drilling according to claim 1, characterized in that, The clamp is embedded with a guide block, which is located below the connection between the clamp and the inner cylinder. The guide block has a guide surface that is inclined toward the second channel and a drainage channel that connects the first channel and the inner cylinder.

3. The integrated steering device for twist-type window drilling according to claim 1, characterized in that, Along the radial direction of the inner cylinder, the sum of the thicknesses of the first reversing portion and the second reversing portion is greater than the depth of the groove.

4. The integrated steering device for twist-type window drilling according to claim 1, characterized in that, The lower part of the clamp forms a cavity, and the torsion device is sleeved inside the cavity. A bottom plug is provided between the clamp and the torsion device to limit the torsion device axially.

5. The integrated steering device for twist-type window drilling according to claim 1, characterized in that, The torsion-type window-opening drilling integrated steering device also includes a sealing ball for sealing the drilling channel.

6. A method for operating a torsion-type window-opening drilling integrated steering device, characterized in that, The operation method of the integrated steering device for twist-type window drilling is implemented using the integrated steering device for twist-type window drilling as described in claim 5, including: Positioning: The integrated torsion-type window-opening drilling steering device is lowered into the target layer via an oil pipe, and the outflow hole of the window-opening channel is aligned with the window opening position; After the window opening operation is completed and the positioning is finished, the plugging ball is inserted to plug the drilling channel, and then the fluid is injected into the tubing pump so that the jet fluid is sprayed from the outlet hole of the window opening channel to the window opening position. After drilling and window opening are completed, stop pumping fluid injection and perform jet fluid return. After the jet fluid and the plugging ball are returned, twist the tubing string so that the outflow hole of the drilling channel is aligned with the window opening position, and then lower the drilling string into the tubing.

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