Coiled tubing multi-mode well drilling control device

Abstract

The invention belongs to the technical field of petroleum drilling, and particularly relates to a coiled tubing multi-mode drilling control device. The coiled tubing multi-mode well drilling control device is connected with other downhole tools and comprises a body, and the upper end and the lower end of the body are coaxially and fixedly connected with the other downhole tools respectively; the wing ribs are movably arranged in the body in the radial direction, the two wing ribs are distributed on the body in the circumferential direction, the phase angle of the two wing ribs is smaller than 180 degrees, in the first state, the two wing ribs are located in the body, in the second state, the outer ends of the two wing ribs are located outside the body, and therefore the wing ribs abut against the well wall. And the direction of the central axis of the body is changed. According to the invention, the drilling angle can be adjusted underground, and the construction time is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling, and in particular relates to a continuous oil pipe multi-mode drilling control device. Background Art

[0002] Coiled tubing technology began to be used in the oil industry in 1962, and has now been widely used in various operational fields of oil and gas exploration, development and production. Coiled tubing drilling (CTD) is a popular technology developed in the 1990s. Especially with the research and improvement of related technologies, its application has expanded in both vertical and horizontal directions, becoming more and more extensive, and has expanded to various fields in the upstream of the oil industry. In addition to conventional pipeline gathering and transportation, production tubing and well repair operations, it covers almost more than 20 operational projects such as oil and gas well completion, logging, injection, old well re-drilling, deepening, side drilling, small wells, underbalanced, overbalanced and horizontal well drilling, and shows good development prospects.

[0003] Due to the wide adaptability of coiled tubing drilling, high efficiency and speed of drilling, outstanding low-cost advantages, and low pollution to the environment, coiled tubing has become an important direction for the development of oil drilling technology. Coiled tubing drilling is likely to become the mainstream of drilling in the future, and will eventually trigger a revolution in the oil industry. In recent years, the number of wells drilled with coiled tubing in the world has increased dramatically, the number of coiled tubing operating machines has reached more than 1,000, the annual consumption of coiled tubing is nearly 5 million m, and the maximum operating depth of coiled tubing has exceeded 9,000 m. At present, the maximum drilling depth of coiled tubing has exceeded 6,900 m. Now the outer diameter of coiled tubing has also developed from the original 12.7 mm to 114.3 mm.

[0004] The coiled tubing sidetracking drilling technology is an internationally recognized cutting-edge technology with notable features such as continuous drill string, pressure operation, uninterrupted circulation, easy pre-installation of optical fiber and cables, and suitability for underbalanced drilling. It avoids thousands of repeated connections and disassemblies of conventional drill strings, significantly improves efficiency, and is safer, more convenient, and more environmentally friendly. It is a high-end technology that oil companies are focusing on developing.

[0005] In drilling projects, coiled tubing applications include coring, placing whipstock and window sidetracking, wireless measurement while drilling, wired measurement of steering tools, liner and hanger installation, etc. Compared with conventional drilling, coiled tubing drilling has the following advantages:

[0006] It can safely realize underbalanced pressure drilling operations, which is beneficial to protecting oil and gas layers and improving drilling speed. Since the continuous oil pipe has no joints, it creates favorable conditions for realizing underbalanced pressure drilling. The annular rubber installed above the blowout preventer acts as an annular blowout preventer that is always in a closed state. It can seal the annulus during drilling and tripping operations, so that drilling operations can be carried out under underbalanced pressure, thereby preventing damage to the well wall and greatly improving the drilling speed;

[0007] Coiled tubing drilling is particularly suitable for small-hole well drilling, sidetracking of old wells, and deepening of old wells. In sidetracking or deepening of old wells, the coiled tubing can be operated through the tubing due to its small diameter, without the need to remove the existing production equipment in the old well, thus achieving the purpose of drilling while mining, which can significantly save drilling costs;

[0008] Coiled tubing drilling requires less ground equipment and occupies a small area, which is particularly suitable for ground or offshore platform operations with limited conditions, reducing the impact on the surrounding environment and the cost of well site construction and maintenance. At the same time, the equipment can be moved, installed, and installed quickly, conveniently, and flexibly.

[0009] Cables can be built into the continuous tubing, which is conducive to automatic control and measurement while drilling, and reduces the number of operators in the construction team.

[0010] The development of coiled tubing drilling technology has been rapid, mainly reflected in the research and development of ground tools, coiled tubing materials, downhole measuring instruments and drill bits. However, the actual drilling still relies on the mud motor to provide drill bit power. However, the mud motor cannot adjust the downhole angle, and the screw drill bits with angles need to cooperate with each other. In addition, during the coiled tubing drilling process, the drill bits in the well cannot rotate. After each orientation, all downhole drill bits must be removed from the well when steady-angle drilling is required, and smaller angle screws or straight screw drill bits must be replaced on the ground. This prolongs the construction time and increases the investment cost. Summary of the invention

[0011] In view of the technical problems mentioned above, the present invention aims to provide a continuous tubing multi-mode drilling control device, which can adjust the drilling angle underground and save construction time.

[0012] According to the present invention, a coiled tubing multi-mode drilling control device is provided, which is connected with other downhole tools, comprising:

[0013] A body, wherein the upper and lower ends of the body are respectively coaxially fixedly connected to other downhole tools;

[0014] A wing rib is movably arranged in the body in a radial direction, two of the wing ribs are distributed on the body in a circumferential direction, and a phase angle of the two wing ribs is less than 180 degrees.

[0015] In the first state, the two wing ribs are located in the body, and in the second state, the outer ends of the two wing ribs are located outside the body, thereby pushing against the well wall and changing the direction of the central axis of the body.

[0016] In a preferred embodiment, the phase angle between the two ribs is 120 degrees.

[0017] In a preferred embodiment, a hydraulic module is disposed in the main body, and the hydraulic module is configured to push the wing rib out of the main body.

[0018] In a preferred embodiment, the wing rib includes a pushing portion and a stop portion, and the two stop portions are symmetrically arranged on both sides of the pushing portion to form a "X" shape. A cover plate is arranged on the main body, and the cover plate is located radially outside the stop portion. A spring is arranged between the cover plate and the stop portion.

[0019] In a preferred embodiment, the hydraulic module includes a hydraulic pump, an oil supply nang and a telescopic mechanism for pushing the wing ribs out of the main body. The hydraulic pump, the oil supply nang and the telescopic mechanism are interconnected by hydraulic connection. The hydraulic pump can pump the hydraulic oil in the oil supply nang into the telescopic mechanism, thereby pushing the wing ribs out of the main body.

[0020] In a preferred embodiment, the hydraulic module further includes a motor, a one-way valve, a bypass valve and a relief valve.

[0021] The motor is drivingly connected to the hydraulic pump.

[0022] The front end of the hydraulic pump is connected to the oil supply nut, and the rear end is connected to the one-way valve.

[0023] The rear end of the one-way valve is connected to the bypass valve.

[0024] The bypass hole of the bypass valve is connected to the oil supply naan, and the rear end of the bypass valve is divided into two branches, one of which is connected to the telescopic mechanism, and the other is connected to the overflow valve.

[0025] The overflow port of the overflow valve is connected to the oil supply naan.

[0026] In a preferred embodiment, the hydraulic module further comprises a cylinder, which is coaxially and intermittently fixed inside the body, and the motor, the hydraulic pump, the one-way valve, the bypass valve and the overflow valve are sequentially arranged axially inside the cylinder.

[0027] In a preferred embodiment, the main body includes a first pipe section and a second pipe section, a first flow channel is arranged in the first pipe section, and a second flow channel is arranged in the second pipe section, the caliber of the first flow channel is larger than the caliber of the second flow channel, the barrel is arranged in the first flow channel, and the drilling fluid can enter the second flow channel through the annulus between the first flow channel and the barrel.

[0028] In a preferred embodiment, an upper end pressure cover is fixedly provided at the top end of the cylinder, and the upper end pressure cover seals the top end of the cylinder. The outer wall of the upper end pressure cover is fixedly connected to the inner wall of the first flow channel, and a plurality of support plates are spaced apart along the circumferential direction at the lower end of the cylinder, and the support plates are fixedly connected to the inner wall of the first flow channel.

[0029] In a preferred embodiment, a first hydraulic channel is provided in one of the support plates of the cylinder, the first hydraulic channel is communicated with the bypass valve, the support plate abuts against the end of the second pipe segment, the wing rib is provided in the pipe wall of the second pipe segment, a second hydraulic channel is provided in the pipe wall of the second pipe segment, the second hydraulic channel is connected to the telescopic mechanism, and the first hydraulic channel and the second hydraulic channel are communicated with each other.

[0030] In a preferred embodiment, internal threads and external threads for connecting other downhole tools are respectively provided at the upper and lower ends of the body.

[0031] Compared with the prior art, the advantages of the present application are as follows.

[0032] In conventional coiled tubing drilling, it is necessary to first use a screw motor with an angle to guide drilling. After reaching the designed inclination and azimuth of the drilling trajectory, all bottom drilling tools must be pulled out from the bottom of the well, replaced with a straight screw motor without an angle, and then lowered into the well to continue steady-inclination drilling. If the trajectory needs to be adjusted due to well wall problems during the drilling process, all the straight screw motor drilling tools without an angle at the bottom must be pulled out of the ground and replaced with a screw motor with an angle for trajectory adjustment drilling. After the adjustment, the drilling tools must be pulled out again and replaced with a screw motor without an angle to continue steady-inclination drilling. This cycle is repeated until the drilling project of the entire wellbore is completed.

[0033] The continuous tubing multi-mode drilling control device proposed in the present invention does not need to frequently lift the drill tool out of the ground. The present invention is installed on the upper part of the screw motor. The screw motor adopts a straight motor without an angle. When the wellbore trajectory needs to be adjusted, the ribs are controlled to extend out of the main body so that the ribs push against the well wall. Thus, the guided drilling and steady-angle drilling modes of the bottom drill tool can be freely switched as needed without lifting the drill. The wellbore trajectory can be adjusted as needed at any time, and the drilled wellbore trajectory is smoother, reducing underground accidents caused by complex wellbore trajectories. Moreover, after using the present invention, a longer wellbore can be drilled at one time without frequent lifting and lowering of the drill bit to replace the drill tool combination, reducing the number of times the drill bit is lifted and lowered, and greatly improving the drilling efficiency.

[0034] The main body is equipped with two 120° circumferential retractable ribs. When directional drilling is required, the ribs are extended and pushed against the well wall, so that the axis of the drilling tool installed at the bottom of the main body is offset from the original wellbore center. In the process of drilling, the length of the rib extension can be controlled to provide direction and deflection control to complete the required trajectory directional drilling. When the directional drilling is completed, the ribs are retracted and the bottom drilling tool is converted into a steady-inclination drilling mode.

[0035] The present invention solves the difficult problem of frequent tripping and replacement of drill tool assemblies during coiled tubing drilling, can greatly improve coiled tubing drilling efficiency, and promotes technical promotion and market application of coiled tubing drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be described below with reference to the accompanying drawings.

[0037] Figure 1 A schematic diagram showing an embodiment of a coiled tubing multi-mode drilling control device according to the present invention;

[0038] Figure 2 A schematic diagram showing the positional relationship between the ribs and the oil supply rib of the coiled tubing multi-mode drilling control device according to the present invention;

[0039] Figure 3 A schematic diagram showing the positional relationship between the circuit control module and the tool face marking groove of the coiled tubing multi-mode drilling control device according to the present invention;

[0040] Figure 4 A schematic diagram showing the ribs and oil supply naan related structures of the coiled tubing multi-mode drilling control device according to the present invention;

[0041] Figure 5 Shows Figure 4 Schematic diagram of the cross-sectional structure in the AA direction;

[0042] Figure 6 Shows Figure 5 Schematic diagram of the cross-sectional structure in the middle BB direction;

[0043] Figure 7 A schematic diagram showing the hydraulic principle of a hydraulic module of a coiled tubing multi-mode drilling control device according to the present invention is shown;

[0044] Figure 8 An enlarged schematic diagram showing the rib-related structure of the coiled tubing multi-mode drilling control device according to the present invention;

[0045] Fig. 9 A schematic diagram showing the barrel-related structure of the coiled tubing multi-mode drilling control device according to the present invention.

[0046] In the figure: 1, body; 101, first pipe section; 102, second pipe section; 2, telescopic mechanism; 3, hydraulic module; 4, circuit control module; 5, oil nan module; 6, male buckle external thread; 7, female buckle internal thread; 8, second flow channel; 9, first flow channel; 10, upper end gland; 11, cylinder; 12, motor; 13, hydraulic pump; 14, one-way valve; 15, bypass valve; 16, overflow valve; 20, support plate; 201, first hydraulic flow channel; 21, cover Plate; 22. first screw; 23. wing rib; 231. pushing portion; 232. stopper; 24. telescopic piston; 25. second hydraulic channel; 26. spring; 28. piston base; 29. ​​circuit cover; 30. third screw; 31. circuit board compartment; 32. control circuit board; 33. oil naan base; 34. oil supply naan; 35. oil naan pressure cover; 36. fourth screw; 37. tool face marking groove; 100. continuous tubing multi-mode drilling control device.

[0047] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present invention and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0048] The present invention will be described below with reference to the accompanying drawings.

[0049] It should be noted that, in the present application, the end close to the internal thread 7 of the female buckle according to the present invention is described as the "front end" or similar terms, and the end close to the external thread 6 of the male buckle is described as the "rear end" or similar terms. They are not used to limit the absolute positions of the components involved, but may vary according to specific circumstances.

[0050] Figure 1 The structure of the coiled tubing multi-mode drilling control device 100 according to the present invention is shown. Figure 1 and Figure 2 As shown, the coiled tubing multi-mode drilling control device 100 includes a body 1 and a rib 23 .

[0051] In this embodiment, the body 1 is in the shape of a cylindrical tube with a cavity, and the upper and lower ends of the body 1 are coaxially fixedly connected to other downhole tools (not shown in the figure).

[0052] The ribs 23 are arranged in the body 1 in a radially movable manner. In this embodiment, two ribs 23 are distributed on the body 1 in the circumferential direction, and the phase angle of the two ribs 23 is less than 180 degrees. In the first state, the two ribs 23 are located in the body 1. In the second state, the two ribs 23 move radially outward so that the outer ends of the ribs 23 are located outside the body 1. In this arrangement, the two ribs 23 at a certain angle to each other can push against the well wall together, so that the central axis of the body 1 is offset and the direction of the central axis of the body 1 is changed.

[0053] Furthermore, a screw motor without an angle is fixedly arranged at the lower end of the body 1, and the lower end of the screw motor drives the drill to rotate to perform wellbore drilling. When the wellbore trajectory needs to be adjusted, the ribs 23 are controlled to extend out of the body 1 so that the ribs 23 push against the wellbore wall, thereby realizing the free conversion of the guided drilling and steady-angle drilling modes of the bottom drilling tool as needed without pulling out the drill, and adjusting the wellbore trajectory at any time as needed, so that the drilled wellbore trajectory is smoother, reducing downhole accidents caused by complex wellbore trajectories.

[0054] According to the present invention, a hydraulic module 3 is arranged in the body 1 , and the hydraulic module 3 is configured to be able to push the rib 23 out of the body 1 .

[0055] In a specific embodiment, Figure 1 and Figure 5 As shown, the hydraulic module 3 includes a hydraulic pump 13, an oil naan module 5, and a telescopic mechanism 2 for pushing the wing rib 23 out of the body 1. The oil naan module 5 includes an oil supply naan 34 for supplying oil to the hydraulic module 3. The hydraulic pump 13, the oil supply naan 34, and the telescopic mechanism 2 are interconnected by a hydraulic connection. The hydraulic pump 13 can pump the hydraulic oil in the oil supply naan 34 into the telescopic mechanism 2, thereby pushing the wing rib 23 out of the body 1.

[0056] In a specific embodiment, Figure 5 and Figure 7 As shown, the hydraulic module 3 also includes a motor 12, a one-way valve 14, a bypass valve 15 and a relief valve 16. The motor 12 is connected to the hydraulic pump 13 by driving, the front end of the hydraulic pump 13 is connected to the oil supply naan 34, the rear end is connected to the one-way valve 14, the rear end of the one-way valve 14 is connected to the bypass valve 15, the bypass hole of the bypass valve 15 is connected to the oil supply naan 34, the rear end of the bypass valve 15 is divided into two branches, one of which is connected to the telescopic mechanism 2, and the other is connected to the relief valve 16, and the overflow port of the relief valve 16 is connected to the oil supply naan 34.

[0057] When it is necessary to control the wing rib 23 to extend out of the body 1, the motor 12 is started to rotate, and the motor 12 drives the hydraulic pump 13. The hydraulic pump 13 pumps the hydraulic oil in the oil supply rib 34 to pass through the one-way valve 14 and the bypass valve 15, and finally enters the telescopic mechanism 2, so that the telescopic mechanism 2 pushes the wing rib 23 to extend radially out of the body 1.

[0058] It is easy to understand that when the rib 23 extends out of the body 1, the bypass hole of the bypass valve 15 is in a closed state.

[0059] During the process of the wing rib 23 extending out of the body 1, the motor 12 is always in the on state, that is, the hydraulic pump 13 is always in the working state, and during the operation of the hydraulic pump 13, the excess hydraulic oil can flow back to the oil supply 34 through the relief valve 16. Therefore, by controlling the relief pressure of the relief valve 16, the force of the wing rib 23 extending out of the body 1 against the well wall can be controlled, thereby controlling the degree of deviation of the central axis of the body 1.

[0060] In a specific embodiment, Figure 5 and Figure 8 As shown, the wing rib 23 includes a push portion 231 and a stop portion 232, and the two stop portions 232 are symmetrically arranged on both sides of the push portion 231, forming a "X" shape. The telescopic mechanism 2 is fixedly arranged on the body 1, and is located on the radial inner side of the push portion 231. A cover plate 21 is arranged on the body 1, and two cover plates 21 are also arranged. The two cover plates 21 are respectively fixedly arranged on the radial outer sides of the two stop portions 232 by first screws 22. When the wing rib 23 moves radially outward under the action of the telescopic mechanism 2, the cover plate 21 can limit the radial movement of the wing rib 23 through the stop portion 232.

[0061] In another specific embodiment, Figure 4 As shown, the cover plate 21 is set to be annular in shape, and the cover plate 21 is fixed to the body 1 by a first screw 22. The stopper 232 of the wing rib 23 is radially blocked by the cover plate 21, and the push portion 231 of the wing rib 23 can extend from the middle of the annular cover plate 21.

[0062] At the same time, in order to enable the wing rib 23 to retract into the body 1 without the action of the telescopic mechanism 2, a spring 26 is provided between the cover plate 21 and the stopper 232. Under this arrangement, when the motor 12 stops working, the bypass hole of the bypass valve 15 opens, and the wing rib 23 moves radially inward under the action of the spring 26. At the same time, the wing rib 23 pushes the telescopic mechanism 2 radially inward, so that the hydraulic oil in the telescopic mechanism 2 flows back to the oil supply 34 through the bypass hole of the bypass valve 15. Finally, the wing rib 23 is completely retracted into the body 1 and no longer pushes against the well wall.

[0063] In a preferred embodiment, the hydraulic module 3 further includes a cylinder 11, which is coaxially and intermittently fixed inside the body 1, and the motor 12, the hydraulic pump 13, the one-way valve 14, the bypass valve 15 and the relief valve 16 are sequentially arranged in the cylinder 11 along the axial direction. Among them, the motor 12 is fixedly arranged in the cylinder 11 in a sealed manner. Under this arrangement, the cylinder 11 can protect the motor 12 to prevent the drilling fluid flowing through the body 1 during the drilling process from damaging the motor 12.

[0064] According to the present invention, the body 1 includes a first pipe section 101 and a second pipe section 102 which are coaxially arranged, the outer diameters of the first pipe section 101 and the second pipe section 102 are equal, and the inner diameter of the first pipe section 101 is greater than the inner diameter of the second pipe section 102. Specifically, the inner cavity of the first pipe section 101 is set as the first flow channel 9, the inner cavity of the second pipe section 102 is set as the second flow channel 8, the caliber of the first flow channel 9 is greater than the caliber of the second flow channel 8, the barrel 11 is intermittently arranged in the first flow channel 9, and the drilling fluid can enter the second flow channel 8 through the annulus between the first flow channel 9 and the barrel 11.

[0065] In a specific embodiment, Figure 5 and Fig. 9 As shown, an upper gland 10 is fixedly arranged at the top of the cylinder 11, and the upper gland 10 seals the top of the cylinder 11. The outer wall of the upper gland 10 is fixedly connected to the inner wall of the first flow channel 9, and a plurality of through holes for the flow of drilling fluid are arranged on the annulus portion between the upper gland 10 and the cylinder 11 corresponding to the first flow channel 9. A plurality of support plates 20 are arranged at intervals along the circumferential direction at the lower end of the cylinder 11, and the support plates 20 are fixedly connected to the inner wall of the first flow channel 9, and the drilling fluid can flow between two adjacent support plates 20. Under this arrangement, the drilling fluid can flow through the first flow channel 9 to the second flow channel 8.

[0066] In a specific embodiment, Figure 5 As shown, the right end of the support plate 20 abuts against the upper end tube wall of the second tube segment 102. A first hydraulic flow channel 201 is provided in one of the support plates 20 of the cylinder 11, and the first hydraulic flow channel 201 is communicated with the bypass valve 15. The wing rib 23 is provided in the tube wall of the second tube segment 102, and a second hydraulic flow channel 25 is provided in the tube wall of the second tube segment 102, and the second hydraulic flow channel 25 is connected to the telescopic mechanism 2. After the right end of the support plate 20 abuts against the upper end of the second tube segment 102, the first hydraulic flow channel 201 and the second hydraulic flow channel 25 are communicated with each other.

[0067] According to the present invention, in a specific embodiment, Figure 8As shown, the telescopic mechanism 2 includes a piston base 28 fixedly arranged on the body 1, and the central axis of the piston base 28 is arranged along the radial direction of the body 1. A telescopic piston 24 is coaxially slidably arranged in the piston base 28, and the lower part of the piston base 28 is connected to the second hydraulic flow channel 25. When the hydraulic pump 13 pumps the hydraulic oil into the piston base 28 through the second hydraulic flow channel 25, the telescopic piston 24 can respond to the pressure of the hydraulic oil and move radially outward along the direction of the central axis of the piston base 28 to the main body 1. During the movement, the telescopic piston 24 can abut against the push-on portion 231 of the wing rib 23, thereby pushing the push-on portion 231 to move, and then the entire wing rib 23 moves radially outward to the main body 1.

[0068] like Figure 1 to Figure 6 As shown, a female internal thread 7 and a male external thread 6 for connecting other downhole tools are respectively provided at the upper and lower ends of the body 1.

[0069] In a preferred embodiment, Figure 2 As shown, the phase angle range of the two wing ribs 23 is 90 degrees to 140 degrees. In this embodiment, the phase angle of the two wing ribs 23 is set to 120 degrees. When the wing ribs 23 push against the well wall, the two wing ribs 23 push against the well wall at the same time, so that the main body 1 moves in the opposite direction of the angle bisector of the two wing ribs 23. The two wing ribs 23 cooperate with each other to make the main body 1 more stable during the displacement process.

[0070] The oily naan module 5 is disposed below the two wing ribs 23 , and the phase angles between the oily naan module 5 and the two wing ribs 23 are equal.

[0071] In a specific embodiment, Figure 4 and Figure 6 As shown, the oil naan module 5 includes an oil naan base 33, an oil supply naan 34, an oil naan pressure cover 35 and a fourth screw 36. The oil naan base 33, the oil supply naan 34 and the oil naan pressure cover 35 are sequentially arranged outwardly along the radial direction of the body 1, the oil naan base 33 is fixedly arranged in the tube wall of the body 1, the oil supply naan 34 is fixedly arranged on the oil naan base 33, and the oil naan pressure cover 35 is fixedly arranged on the outer wall of the body 1 by the fourth screw 36, so as to seal the oil supply naan 34 in the body 1.

[0072] like Figure 1 , Figure 3 and Figure 6 As shown, the coiled tubing multi-mode drilling control device 100 further includes a circuit control module 4. The circuit control module 4 is fixedly arranged on the body 1, and the phase angle between the circuit control module 4 and the oil drilling module 5 is 180 degrees.

[0073] In a specific embodiment, the circuit control module 4 includes a circuit cover 29 , a third screw 30 , a circuit board compartment 31 and a control circuit board 32 .

[0074] The circuit board compartment 31 is specifically an inwardly recessed rectangular groove arranged on the outer wall of the body 1, the control circuit board 32 is fixedly arranged in the circuit board compartment 31, and the circuit cover 29 is sealed and buckled on the outside of the circuit board compartment 31, so as to seal and fix the control circuit board 32 in the circuit board compartment 31. The edge of the circuit cover 29 is fixedly connected to the body 1 by a plurality of third screws 30.

[0075] The control circuit board 32 is electrically connected to the motor 12 , and the control circuit board 32 can control the motor 12 .

[0076] like Figure 1 and Figure 3 As shown, a tool face marking groove 37 is provided on the exterior of the body 1 .

[0077] In this embodiment, the upper end of the body 1 is connected to the coiled tubing. When the trajectory needs to be guided during drilling with the coiled tubing, the directional steering device (not shown in the figure) in the drilling tool connected to the bottom of the body 1 turns the tool face marking groove 37 of the body 1 to the required direction and locks it according to the trajectory well inclination and azimuth requirements, and then sends a guidance instruction from the ground. After receiving the ground instruction, the circuit control module 4 of the present invention starts the motor 12 in the hydraulic module 3 to work, and the motor 12 drives the hydraulic pump 13 to work, and the hydraulic pump 13 turns the hydraulic oil in the oil supply naan 34 to the hydraulic oil supply naan 34. Oil is pumped into the telescopic mechanism 2. When the hydraulic pump 13 works, the bypass hole of the bypass valve 15 in the hydraulic module 3 is automatically closed, and the pumped hydraulic oil pushes the telescopic piston 24 to extend, thereby pushing the rib 23 to the set position. The rib 23 is subjected to the reverse thrust of the well wall, pushing the central axis of the body 1 away from the center of the wellbore, thereby driving the drilling tools and drill bit at the bottom of the body 1 to deviate from the existing wellbore center, achieving a geometric guiding effect of the bottom drilling tool, so that the straight screw motor drives the drill bit to rotate to give the wellbore a required directional side cutting force, thereby achieving the purpose of guided drilling.

[0078] During the guided drilling process, the motor 12 is always working. When the hydraulic oil pumped into the telescopic mechanism 2 exceeds the set pressure, the excess hydraulic oil will flow into the oil supply trough 34 through the overflow valve 16 in the hydraulic module 3 to ensure that the hydraulic oil pressure of the telescopic mechanism 2 remains stable.

[0079] When the guided drilling completes the required target, a steady-inclination drilling command is issued from the ground. After the circuit control module 4 of the present invention receives the ground steady-inclination drilling mode command, the motor 12 in the hydraulic module 3 is shut down to stop it from working. After that, the hydraulic module 3 will no longer pump hydraulic oil into the telescopic mechanism 2. At the same time, the bypass valve 15 in the hydraulic module 3 automatically opens, and the high-pressure hydraulic oil in the piston base 28 in the telescopic mechanism 2 will flow back through the bypass valve 15 in the hydraulic module 3 to the oil supply 34 in the oil sump module 5 for storage.

[0080] Since the high-pressure hydraulic oil in the piston base 28 of the telescopic mechanism 2 has been depressurized and is the same as the external pressure of the body 1, the rib 23 retracts under the action of the spring 26. At this time, the axis of the body 1 is the same as the axis of the wellbore, and the entire bottom drilling tool becomes a set of stable inclination drilling tool combination mode to complete the stable inclination drilling work required by the trajectory.

[0081] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not constitute any limitation to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coiled tubing multi-mode drilling control device, connected to other downhole tools, characterized in that: include: A body (1), wherein the upper and lower ends of the body (1) are respectively coaxially fixedly connected to other downhole tools; A wing rib (23) is movably arranged in the body (1) in a radial direction, two of the wing ribs (23) are distributed on the body (1) in a circumferential direction, and a phase angle of the two wing ribs (23) is less than 180 degrees. In the first state, the two wing ribs (23) are located inside the body (1), and in the second state, the outer ends of the two wing ribs (23) are located outside the body (1), thereby pushing against the well wall and changing the direction of the central axis of the body (1).

2. The coiled tubing multi-mode drilling control device according to claim 1, characterized in that: A hydraulic module (3) is arranged in the body (1), and the hydraulic module (3) is configured to be able to push the wing rib (23) out of the body (1).

3. The coiled tubing multi-mode drilling control device according to claim 2, characterized in that: The wing rib (23) comprises a pushing portion (231) and a stop portion (232), wherein the two stop portions (232) are symmetrically arranged on both sides of the pushing portion (231) to form a "X" shape, and a cover plate (21) is arranged on the body (1), wherein the cover plate (21) is located radially outward of the stop portion (232), and a spring (26) is arranged between the cover plate (21) and the stop portion (232).

4. The coiled tubing multi-mode drilling control device according to claim 2, characterized in that: The hydraulic module (3) comprises a hydraulic pump (13), an oil supply naan (34) and a telescopic mechanism (2) for pushing the wing rib (23) out of the body (1); the hydraulic pump (13), the oil supply naan (34) and the telescopic mechanism (2) are interconnected by means of a hydraulic connection; the hydraulic pump (13) can pump the hydraulic oil in the oil supply naan (34) into the telescopic mechanism (2), thereby pushing the wing rib (23) out of the body (1).

5. The coiled tubing multi-mode drilling control device according to claim 4, characterized in that: The hydraulic module (3) further comprises a motor (12), a one-way valve (14), a bypass valve (15) and a relief valve (16). The motor (12) is drivingly connected to the hydraulic pump (13). The front end of the hydraulic pump (13) is connected to the oil supply nut (34), and the rear end is connected to the one-way valve (14). The rear end of the one-way valve (14) is connected to the bypass valve (15). The bypass hole of the bypass valve (15) is connected to the oil supply naan (34), and the rear end of the bypass valve (15) is provided with two branches, one of which is connected to the telescopic mechanism (2), and the other is connected to the overflow valve (16). The overflow port of the overflow valve (16) is connected to the oil supply naan (34).

6. The coiled tubing multi-mode drilling control device according to claim 5, characterized in that: The hydraulic module (3) further comprises a cylinder (11), wherein the cylinder (11) is coaxially and intermittently fixed inside the body (1), and the motor (12), the hydraulic pump (13), the one-way valve (14), the bypass valve (15) and the overflow valve (16) are sequentially arranged in the cylinder (11) along the axial direction.

7. The coiled tubing multi-mode drilling control device according to claim 6, characterized in that: The body (1) comprises a first pipe section (101) and a second pipe section (102); a first flow channel (9) is arranged in the first pipe section (101), and a second flow channel (8) is arranged in the second pipe section (102); the caliber of the first flow channel (9) is larger than the caliber of the second flow channel (8); the barrel (11) is arranged in the first flow channel (9), and drilling fluid can enter the second flow channel (8) through the annulus between the first flow channel (9) and the barrel (11).

8. The coiled tubing multi-mode drilling control device according to claim 7, characterized in that: An upper end pressure cover (10) is fixedly arranged at the top end of the cylinder (11), and the upper end pressure cover (10) seals the top end of the cylinder (11). The outer wall of the upper end pressure cover (10) is fixedly connected to the inner wall of the first flow channel (9). A plurality of support plates (20) are arranged at intervals along the circumferential direction at the lower end of the cylinder (11), and the support plates (20) are fixedly connected to the inner wall of the first flow channel (9).

9. The coiled tubing multi-mode drilling control device according to claim 8, characterized in that: A first hydraulic channel (201) is arranged in one of the support plates (20) of the cylinder (11), the first hydraulic channel (201) is communicated with the bypass valve (15), the support plate (20) is in contact with the end of the second pipe section (102), the wing rib (23) is arranged in the pipe wall of the second pipe section (102), a second hydraulic channel (25) is arranged in the pipe wall of the second pipe section (102), the second hydraulic channel (25) is connected with the telescopic mechanism (2), and the first hydraulic channel (201) and the second hydraulic channel (25) are communicated with each other.

10. The coiled tubing multi-mode drilling control device according to any one of claims 1 to 9, characterized in that: An internal thread and an external thread for connecting other downhole tools are respectively arranged at the upper and lower ends of the body (1).

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