Coiled tubing drilling motor steering gear

Abstract

The invention relates to the technical field of well drilling in oil and gas exploitation, in particular to a coiled tubing well drilling motor steering gear which comprises a hollow center shaft and a driving assembly, a conversion assembly, a first clutch mechanism, a second clutch mechanism, a locking mechanism and a lower connector which are sequentially installed on the outer side of the center shaft from top to bottom. And after the driving assembly reciprocates up and down on the outer side of the center shaft, the conversion assembly can rotate on the outer side of the center shaft. The device is reasonable and compact in structure, high-pressure and low-pressure slurry is repeatedly pumped into the driving assembly and the center shaft through the ground slurry pump, so that the driving assembly reciprocates up and down on the outer side of the center shaft after a pressure difference is formed inside and outside the driving assembly; and finally, the lower connector rotates in the clockwise direction through the conversion assembly, the first clutch mechanism and the second clutch mechanism, the well drilling track can be adjusted, the driving assembly is locked through the locking mechanism, the driving assembly cannot move up and down in a reciprocating mode, and therefore the angle stability of the tool string in the well drilling process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling in oil and gas exploitation, and is a continuous oil pipe drilling motor steering device. Background Art

[0002] At present, drilling and completing horizontal wells is a way to greatly increase the production of oil and gas. Conventional horizontal well drilling uses drill pipes to complete drilling. The drill pipe has good rigidity. When the motor and its drill bit need to be adjusted, the pipe string can be directly rotated. However, the coiled tubing is different. Since the coiled tubing is a flexible steel pipe without joints, it is a flexible pipe with a length of several hundred meters to about 7,000 meters.

[0003] Like drill pipe, coiled tubing can be used to deliver drilling tools into the well, and can also be used to pull out tools. It can also pump mud required for drilling through the mud pump equipment on the ground to lubricate the drill bit and carry rock cutting. However, coiled tubing cannot select its own string to complete the direction adjustment of the drill bit. When drilling with coiled tubing strings, special tools are required to complete the direction adjustment action. Summary of the invention

[0004] The present invention provides a coiled tubing drilling motor steering device, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problem of difficulty in completing drill bit direction adjustment in the prior coiled tubing.

[0005] The technical solution of the present invention is achieved by the following measures: a coiled tubing drilling motor steering gear, comprising a hollow central shaft and a drive assembly, a conversion assembly, a first clutch mechanism, a second clutch mechanism, a locking mechanism and a lower joint which are sequentially installed on the outer side of the central shaft from top to bottom; The driving assembly can cause the conversion assembly to rotate outside the central axis after reciprocating up and down outside the central axis; After the conversion assembly rotates, the lower joint can be rotated at a certain angle through the first clutch mechanism; The second clutch mechanism can make the lower joint rotate in a clockwise direction and at a certain angle after the conversion assembly rotates; After the locking mechanism is actuated, the driving assembly can be prevented from reciprocating up and down.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned driving assembly may include an upper joint, an upper core shaft, an upper piston cylinder, an upper piston rod, a lower piston cylinder, a lower piston rod, a first elastic reset and a second elastic reset member, the inner side of the lower end of the upper joint and the outer side of the upper end of the upper core shaft are sealed and fixed together, a first limiting ring is fixed on the outer side of the upper part of the upper core shaft, the lower end of the upper core shaft and the upper end of the center shaft are sealed and fixed together, the outer side of the first limiting ring is sleeved with an upper piston cylinder whose upper end is located below the upper joint, the inner side of the lower end of the upper piston cylinder and the outer side of the upper end of the first connecting head which is sealed and sleeved on the outer side of the upper core shaft are sealed and fixed together, the outer side of the lower end of the first connecting head and the inner side of the upper end of the lower piston cylinder which is sleeved on the outer side of the lower part of the upper core shaft are fixed together, an upper piston rod whose lower end is located below the first connecting head is sleeved between the inner side of the first connecting head and the outer side of the upper core shaft, and a sealing sleeve is fixed on the upper end of the upper piston rod corresponding to the upper end position of the first connecting head, which is sealed and sleeved on the inner side of the upper piston cylinder and the outer side of the upper core shaft. The cam is provided with a second limit stop ring on the side, and a first elastic reset piece is provided between the upper end of the second limit stop ring and the lower end of the first limit stop ring. The outer side of the lower piston rod lower end is sealed and fixed together with the inner side of the upper end of the lower piston rod, and the lower piston rod lower end and the upper part of the conversion assembly are installed together. The outer side of the upper end of the lower piston rod is fixed with a third limit stop ring which is in sealing contact with the inner side of the lower piston cylinder. A second elastic reset piece is installed between the upper end of the third limit stop ring and the inner side of the lower part of the first connecting head. At least one first connecting hole connected inside and outside is distributed along the circumference at intervals at intervals at intervals at intervals at the outer side of the upper part of the upper piston cylinder corresponding to the position between the first limit stop ring and the second limit stop ring. At least one second connecting hole connected inside and outside is distributed along the circumference at intervals at intervals at intervals at intervals at the outer side of the upper part of the upper piston rod corresponding to the position below the second limit stop ring. At least one third connecting hole connected inside and outside is distributed along the circumference at intervals at intervals at intervals at the outer side of the upper part of the lower piston cylinder corresponding to the position between the first connecting head and the third limit stop ring.

[0007] The above-mentioned conversion assembly may include a second connecting head, a spiral sleeve and a guide block. The inner side of the lower end of the lower piston cylinder is sealed and fixedly installed with the outer side of the upper end of the second connecting head coaxially mounted on the outer side of the lower piston rod. The lower end of the second connecting head is installed together with the outer upper end of the first clutch mechanism. A fourth limiting ring is fixed to the inner side of the upper part of the lower piston rod corresponding to the lower end position of the upper piston rod. The outer side of the upper end of the central shaft and the outer side of the lower end of the upper core shaft corresponding to the lower end position of the fourth limiting ring are sealed and fixedly installed together. At least one spiral guide groove is evenly distributed along the circumference on the outer side of the upper part of the central shaft. A spiral sleeve mounted on the outer side of the central shaft is fixedly installed on the outer side of the lower end of the lower piston rod. The lower end of the spiral sleeve is installed together with the inner upper end of the first clutch mechanism. A guide block is fixed to the inner side of the lower end of the spiral sleeve corresponding to each guide groove position. When the guide block moves upward along the guide groove, it drives the spiral sleeve to rotate in a clockwise direction.

[0008] The above-mentioned first clutch mechanism may include an outer gear cylinder, an upper flywheel shaft, an upper end cover, an upper rotating shaft, an upper pawl and an upper torsion spring. The outer side of the lower part of the second connector and the inner side of the upper part of the outer gear cylinder are sealed and fixed together. The lower end of the outer gear cylinder is installed together with the upper end of the outer part of the locking mechanism. The inner side of the outer gear cylinder is evenly distributed along the circumference. The outer side of the lower end of the spiral sleeve and the inner side of the upper end of the upper flywheel shaft coaxially mounted between the outer side of the central shaft and the inner side of the outer gear cylinder are fixed together. The lower end of the upper flywheel shaft is provided with an upper end cover mounted on the outer side of the central shaft. The lower end of the upper flywheel shaft is evenly distributed along the circumference with a plurality of upper sliding grooves. , each upper slide groove is provided with an upper rotating shaft whose lower end is rotatably installed on the upper side of the upper end cover, an upper swinging groove connected with the upper slide groove is provided on the outer side of the upper flywheel shaft corresponding to each upper slide groove position, an upper mounting groove is provided between each two adjacent upper slide grooves, each upper mounting groove is connected with the upper swinging groove at the corresponding position, an upper pawl whose first end is fixed to the corresponding upper rotating shaft is installed in each upper swinging groove, an upper torsion spring is installed in each upper mounting groove so that the second end of the upper pawl is meshed with the corresponding ratchet groove, and the second end of the upper pawl is located in front of the first end in the clockwise direction.

[0009] The above-mentioned second clutch mechanism may include a lower core shaft, a lower flywheel shaft, a lower end cover, a lower rotating shaft, a lower pawl and a lower torsion spring. The outer side of the central shaft corresponding to the position below the upper end cover and the inner side of the upper part of the lower flywheel shaft are sealed and fixed together. The lower core shaft is sealed and fixedly installed on the inner side of the lower part of the lower flywheel shaft corresponding to the lower end position of the central shaft. A fifth limiting ring platform is fixedly installed on the outer side of the upper part of the lower core shaft corresponding to the position below the lower flywheel shaft. The lower end cover is installed on the upper end of the fifth limiting ring platform. The lower end of the lower flywheel shaft is evenly spaced along the circumference with a plurality of sliding grooves, and each sliding groove is provided with a lower end rotatably installed on the lower end cover. The lower rotating shaft on the side is provided with a lower swinging groove connected with the lower sliding groove on the outer side of the lower flywheel shaft corresponding to each lower sliding groove position, a lower mounting groove is provided between each two adjacent lower sliding grooves, each lower mounting groove is connected with the lower swinging groove at the corresponding position, and a lower pawl whose first end is fixed to the corresponding lower rotating shaft is installed in each lower swinging groove, and a lower torsion spring is installed in each lower mounting groove so that the second end of the lower pawl is engaged with the corresponding ratchet groove, and along the clockwise direction, the second end of the lower pawl is located in front of the first end, and the lower end of the lower core shaft is installed together with the upper end of the locking mechanism.

[0010] The above-mentioned locking mechanism may include a third connector, a transposition ring and a transposition column, the inner side of the lower end of the outer gear cylinder is sealed and fixedly installed together with the outer side of the upper end of the third connector, the lower end of the third connector is sealed and fixedly installed together with the upper end of the lower joint, and the outer side of the middle portion of the third connector is fixed with a sixth limiting ring platform that is in sealing contact with the outer side of the lower part of the lower core shaft, and an installation ring groove is provided on the inner side of the lower portion of the outer gear cylinder corresponding to the position below the ratchet groove, and a transposition ring is installed in the installation ring groove and is sleeved on the outer side of the lower core shaft corresponding to the position between the fifth limiting ring platform and the sixth limiting ring platform. A groove-type rotating guide track is provided on the outer side of the lower core shaft corresponding to the position between the fifth limiting ring platform and the sixth limiting ring platform, and at least one mounting hole connected inside and outside is evenly distributed along the circumference of the outer side of the transposition ring, and a transposition column with an end located at a corresponding position in the groove-type rotating guide track is fixedly installed in the mounting hole. When the transposition column moves in the groove-type rotating guide track, the sixth limiting ring platform can move up and down, and at least one fourth connecting hole connected inside and outside is evenly distributed along the circumference of the outer side of the lower end of the lower core shaft corresponding to the position between the sixth limiting ring platform and the transposition ring.

[0011] The rotation angle of the above-mentioned transposition column when moving in the groove type rotary guide track is the same as the angle at which the spiral sleeve is driven to rotate in the clockwise direction when the guide block moves upward along the guide groove, both of which are between 10 and 60 degrees.

[0012] The upper end of the first limiting ring platform may be provided with a guide sleeve whose lower end outer side is fixedly mounted with the inner side of the upper piston cylinder, and the upper end outer side of the guide sleeve is sleeved on the outer side of the lower part of the upper joint.

[0013] At least one buffer pad may be installed between the lower end of the guide sleeve and the upper end of the first limiting ring platform.

[0014] The structure of the present invention is reasonable and compact. By repeatedly pumping high-pressure and low-pressure mud into the driving component and the central shaft through a ground mud pump, a pressure difference is formed inside and outside the driving component, and then the driving component reciprocates up and down outside the central shaft. Finally, the lower joint is rotated in a clockwise direction through the conversion component, the first clutch mechanism and the second clutch mechanism, so that the drilling trajectory can be adjusted. The driving component is locked by the locking mechanism, so that the driving component cannot reciprocate up and down, thereby ensuring the angle stability of the tool string during the drilling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the main cross-sectional structure of the upper part of the first embodiment.

[0016] Attached Figure 2 It is a schematic diagram of the main cross-sectional structure of the middle part of the first embodiment.

[0017] Attached Figure 3 It is a schematic diagram of the main cross-sectional structure of the lower part of the embodiment.

[0018] Attached Figure 4 For attachment Figure 3Schematic diagram of the enlarged cross-sectional structure at AA in the middle.

[0019] Attached Figure 5 For attachment Figure 3 Schematic diagram of the enlarged cross-section structure at the middle BB.

[0020] The codes in the accompanying drawings are: 1 is the central axis, 2 is the lower joint, 3 is the upper joint, 4 is the upper core shaft, 5 is the upper piston cylinder, 6 is the upper piston rod, 7 is the lower piston cylinder, 8 is the lower piston rod, 9 is the first elastic return member, 10 is the second elastic return member, 11 is the first limit ring, 12 is the first connector, 13 is the second limit ring, 14 is the third limit ring, 15 is the first connecting hole, 16 is the second connecting hole, 17 is the third connecting hole, 18 is the second connector, 19 is the spiral sleeve, 20 is the guide block, 21 is the fourth limit ring, 22 is the guide groove , 23 is an outer gear cylinder, 24 is an upper flywheel shaft, 25 is an upper end cover, 26 is an upper rotating shaft, 27 is an upper pawl, 28 is an upper torsion spring, 29 is a ratchet groove, 30 is an upper swing groove, 31 is a lower core shaft, 32 is a lower flywheel shaft, 33 is a lower end cover, 34 is a lower rotating shaft, 35 is a lower pawl, 36 is a lower torsion spring, 37 is a fifth limiting ring platform, 38 is a lower swing groove, 39 is a third connector, 40 is a transposition ring, 41 is a transposition column, 42 is a sixth limiting ring platform, 43 is a grooved rotating guide track, 44 is a fourth connecting hole, 45 is a guide sleeve, and 46 is a buffer pad. DETAILED DESCRIPTION

[0021] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0022] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0023] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figures 1 to 5 As shown, the coiled tubing drilling motor steering gear comprises a hollow central shaft 1 and a driving assembly, a conversion assembly, a first clutch mechanism, a second clutch mechanism, a locking mechanism and a lower joint 2 which are sequentially installed on the outer side of the central shaft 1 from top to bottom; The driving assembly can make the conversion assembly rotate outside the central axis 1 after reciprocating up and down outside the central axis 1; After the conversion assembly rotates, the lower joint 2 can be rotated at a certain angle through the first clutch mechanism; The second clutch mechanism can make the lower joint 2 rotate in a clockwise direction and at a certain angle after the conversion assembly rotates; After the locking mechanism is actuated, the driving assembly can be prevented from reciprocating up and down.

[0024] During use, a tool string, such as a non-magnetic drill collar and its MDW instrument, a motor and its drill bit tool string, is installed on the lower joint 2. The upper end of the central axis 1 is connected to the outlet of the ground mud pump. By repeatedly pumping high-pressure and low-pressure mud into the driving assembly and the central axis 1 through the ground mud pump, a pressure difference is formed inside and outside the driving assembly, and then the driving assembly reciprocates up and down on the outside of the central axis 1. After the driving assembly reciprocates up and down on the outside of the central axis 1, the lower joint 2 is finally rotated in a clockwise direction through the conversion assembly, the first clutch mechanism and the second clutch mechanism. In this way, the tool string installed on the lower joint 2 rotates according to the set angle, and the rotation angle of the tool string can be adjusted according to the direction of the oil layer, thereby adjusting the drilling trajectory. After the rotation angle of the tool string is adjusted, the driving assembly is locked by the locking mechanism, so that the driving assembly cannot reciprocate up and down, thereby ensuring the angle stability of the tool string during the drilling process. The present invention has a reasonable and compact structure, is simple to operate, and is flexible and convenient to use, and can improve the adjustment efficiency of the existing drilling process.

[0025] The above coiled tubing drilling motor steering gear can be further optimized and / or improved according to actual needs: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2As shown, the drive assembly includes an upper joint 3, an upper core shaft 4, an upper piston cylinder 5, an upper piston rod 6, a lower piston cylinder 7, a lower piston rod 8, a first elastic reset and a second elastic reset member 10, the inner side of the lower end of the upper joint 3 and the outer side of the upper end of the upper core shaft 4 are sealed and fixed together, a first limiting ring 11 is fixed to the outer side of the upper part of the upper core shaft 4, the lower end of the upper core shaft 4 is sealed and fixed together with the upper end of the central axis 1, the outer side of the first limiting ring 11 is sleeved with an upper piston cylinder 5 with an upper end located below the upper joint 3, and the upper piston The inner side of the lower end of the cylinder 5 and the upper end outer side of the first connecting head 12 which is sealed and fixedly mounted on the outer side of the upper core shaft 4 are sealed and fixedly mounted together. The lower end outer side of the first connecting head 12 and the upper end inner side of the lower piston cylinder 7 which is sealed and fixedly mounted on the outer side of the lower part of the upper core shaft 4 are fixedly mounted together. An upper piston rod 6 with a lower end located below the first connecting head 12 is mounted between the inner side of the first connecting head 12 and the outer side of the upper core shaft 4. A sealing sleeve is fixedly mounted on the inner side of the upper piston cylinder 5 and the outer side of the upper core shaft 4 at the upper end of the upper piston rod 6 corresponding to the upper end position of the first connecting head 12. A second limiting ring platform 13 on the side, a first elastic reset member 9 is provided between the upper end of the second limiting ring platform 13 and the lower end of the first limiting ring platform 11, the outer side of the lower end of the upper piston rod 6 and the inner side of the upper end of the lower piston rod 8 are sealed and fixed together, the lower end of the lower piston rod 8 and the upper part of the conversion assembly are installed together, and a third limiting ring platform 14 is fixed on the outer side of the upper end of the lower piston rod 8 and is in sealing contact with the inner side of the lower piston cylinder 7, and a second elastic reset member 10 is installed between the upper end of the third limiting ring platform 14 and the inner side of the lower part of the first connecting head 12, and at least one first connecting hole 15 connected inside and outside is distributed along the circumference at intervals on the outer side of the upper part of the upper piston cylinder 5 corresponding to the position between the first limiting ring platform 11 and the second limiting ring platform 13, and at least one second connecting hole 16 connected inside and outside is distributed along the circumference at intervals on the outer side of the upper part of the upper piston rod 6 corresponding to the position below the second limiting ring platform 13, and at least one third connecting hole 17 connected inside and outside is distributed along the circumference at intervals on the outer side of the upper part of the lower piston cylinder 7 corresponding to the position between the first connecting head 12 and the third limiting ring platform 14.

[0026] According to the requirements, the first elastic reset member 9 and the second elastic reset member 10 are existing well-known technologies, such as compression springs, corresponding to the outer side of the upper piston rod 6 and the inner side of the first connector 12 at the position below the second connecting hole 16, which are in sealing contact. During use, by setting the third connecting hole 17, after the drive assembly is lowered into the well, the fluid entering the upper connector 3 flows into the central shaft 1 after passing through the upper core shaft 4, and the fluid flows upward through the connection gap between the central shaft 1 and the locking mechanism and flows into the lower end of the third limit ring 14, and acts on the third limit ring 14, so that the upper end of the third limit ring 14 compresses the second elastic reset member 10, and the lower piston rod 8 moves upward. At the same time, the fluid passes through the connection gap between the central shaft 1 and the locking mechanism and flows into the lower end of the second limit ring 12 through the second connecting hole 16, and acts on the second limit ring 13, so that the upper end of the second limit ring 13 compresses the first elastic reset member 9, and the upper piston rod 6 moves upward. When the fluid pressure is reduced, the first elastic reset member 9 and the second elastic reset member 10 make the upper The piston rod 6 and the lower piston rod 8 move downward at the same time. After the upper piston rod 6 and the lower piston rod 8 move back and forth up and down on the outside of the upper core shaft 4, they can drive the conversion assembly to rotate on the outside of the central axis 1, thereby driving the motor installed on the lower joint 2 to rotate, so that the bending direction of the motor can be adjusted, and finally the drilling direction of the drill bit can be adjusted. By setting the first connecting hole 15 and the third connecting hole 17, it is possible to avoid pressure buildup in the mounting ring cavity of the first elastic reset member 9 and the second elastic reset member 10 when the upper piston rod 6 and the lower piston rod 8 move upward, and it is possible to enable the fluid or gas at the upper end of the second limit ring platform 13 and the upper end of the third limit ring platform 14 to be quickly discharged to the outside of the piston cylinder when the upper piston rod 6 and the lower piston rod 8 move upward, so that the upper piston rod 6 and the lower piston rod 8 can move up and down more smoothly.

[0027] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in Figure 3, the conversion assembly includes a second connector 18, a spiral sleeve 19 and a guide block 20. The inner side of the lower end of the lower piston cylinder 7 is sealed and fixedly installed with the outer side of the upper end of the second connector 18 coaxially mounted on the outer side of the lower piston rod 8. The lower end of the second connector 18 is installed together with the upper end of the first clutch mechanism. A fourth limiting ring platform 21 is fixed to the inner side of the upper part of the lower piston rod 8 corresponding to the lower end position of the upper piston rod 6. The outer side of the upper end of the central axis 1 and the outer side of the lower end of the upper core shaft 4 are sealed and fixedly installed together at the lower end of the fourth limiting ring platform 21. At least one spiral guide groove 22 is evenly distributed along the circumference of the outer side of the upper part of the central axis 1. The spiral sleeve 19 mounted on the outer side of the central axis 1 is fixedly installed on the outer side of the lower end of the lower piston rod 8. The lower end of the spiral sleeve 19 is installed together with the upper end of the first clutch mechanism. A guide block 20 is fixed to the inner side of the lower end of the spiral sleeve 19 corresponding to each guide groove 22. When the guide block 20 moves upward along the guide groove 22, it drives the spiral sleeve 19 to rotate in the clockwise direction.

[0028] During use, through such an arrangement, after the drive assembly is lowered into the well, the fluid entering the upper joint 3 flows into the central shaft 1 after passing through the upper core shaft 4, and the fluid flows upward through the connection gap between the central shaft 1 and the locking mechanism and flows into the lower end of the third limit ring platform 14 facing the third limit ring platform 14, so that the upper end of the third limit ring platform 14 compresses the second elastic reset member 10, and the lower piston rod 8 moves upward. At the same time, the fluid passes through the connection gap between the central shaft 1 and the locking mechanism and flows into the lower end of the second limit ring platform 13 through the second connecting hole 16, facing the second limit ring platform 1 3, so that the upper end of the second limit ring 13 compresses the first elastic reset member 9, and the upper piston rod 6 moves upward. When the upper piston rod 6 and the lower piston rod 8 move upward at the same time, the spiral sleeve 19 can be driven to move upward. When the spiral sleeve 19 moves upward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from bottom to top in the spiral guide groove 22, it drives the spiral sleeve 19 to rotate in the clockwise direction, thereby driving the locking mechanism and the lower joint 2 to rotate in the clockwise direction, thereby driving the motor installed on the lower joint 2 to rotate in the clockwise direction.

[0029] When the fluid pressure is reduced, the first elastic return member 9 and the second elastic return member 10 make the upper piston rod 6 and the lower piston rod 8 move downward at the same time. When the upper piston rod 6 and the lower piston rod 8 move downward at the same time, the spiral sleeve 19 can be driven to move downward. When the spiral sleeve 19 moves downward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from top to bottom in the spiral guide groove 22, the spiral sleeve 19 can be prevented from rotating in the reverse direction (counterclockwise) under the action of the first clutch mechanism and the second clutch mechanism, driving the locking mechanism and the lower joint 2 to rotate in the clockwise direction, thereby driving the motor installed in the lower joint 2 to rotate in the clockwise direction. In this way, the pump can be started to increase pressure and stopped to relieve pressure in the upper joint 3 of the ground circulation pump, so that the motor installed on the lower joint 2 rotates in one direction, thereby achieving the purpose of adjusting the drilling direction of the drill bit.

[0030] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2As shown in Figures 3 and 4, the first clutch mechanism includes an outer gear cylinder 23, an upper flywheel shaft 24, an upper end cover 25, an upper rotating shaft 26, an upper ratchet 27 and an upper torsion spring 28. The outer side of the lower part of the second connector 18 and the inner side of the upper part of the outer gear cylinder 23 are sealed and fixed together. The lower end of the outer gear cylinder 23 is installed together with the upper end of the locking mechanism. The inner side of the outer gear cylinder 23 is evenly distributed along the circumference with a plurality of ratchet grooves 29. The outer side of the lower end of the spiral sleeve 19 and the inner side of the upper end of the upper flywheel shaft 24 coaxially mounted between the outer side of the central shaft 1 and the inner side of the outer gear cylinder 23 are fixed together. The lower end of the upper flywheel shaft 24 is provided with an upper end cover 25 mounted on the outer side of the central shaft 1. The lower end of the upper flywheel shaft 24 is evenly spaced along the circumference. There are several upper slide grooves, each of which is provided with an upper rotating shaft 26 whose lower end is rotatably installed on the upper side of the upper end cover 25, and an upper swinging groove 30 connected with the upper slide groove is provided on the outer side of the upper flywheel shaft 24 corresponding to each upper slide groove position, and an upper mounting groove is provided between each two adjacent upper slide grooves, and each upper mounting groove is connected with the upper swinging groove 30 at the corresponding position, and an upper pawl 27 whose first end is fixed to the corresponding upper rotating shaft 26 is installed in each upper swinging groove 30, and an upper torsion spring 28 is installed in each upper mounting groove so that the second end of the upper pawl 27 is meshed with the corresponding ratchet groove 29, and the second end of the upper pawl 27 is located in front of the first end in the clockwise direction.

[0031] During use, through such an arrangement, when the upper piston rod 6 and the lower piston rod 8 move upward at the same time, the spiral sleeve 19 can be driven to move upward. When the spiral sleeve 19 moves upward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from bottom to top in the spiral guide groove 22, it drives the spiral sleeve 19 to rotate in the clockwise direction and move upward at the same time, thereby driving the upper flywheel shaft 24 to move upward and rotate in the clockwise direction. When the upper flywheel shaft 24 rotates in the clockwise direction, it drives the upper rotating shaft 26 to rotate in the clockwise direction. When the upper rotating shaft 26 rotates in the clockwise direction, the upper ratchet 27 drives the outer gear cylinder 23 to rotate in the clockwise direction, driving the locking mechanism and the lower joint 2 to rotate in the clockwise direction, thereby driving the motor installed on the lower joint 2 to rotate in the clockwise direction.

[0032] When the upper piston rod 6 and the lower piston rod 8 move downward at the same time, they can drive the spiral sleeve 19 to move downward. When the spiral sleeve 19 moves downward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from top to bottom in the spiral guide groove 22, it drives the spiral sleeve 19 to rotate in the counterclockwise direction and move downward at the same time, thereby driving the upper flywheel shaft 24 to move downward and rotate in the counterclockwise direction. When the flywheel shaft rotates in the counterclockwise direction, the second clutch mechanism can prevent the outer gear cylinder 23 from rotating, so that the ratchet groove 29 of the outer gear cylinder 23 squeezes the upper pawl 27, so that the second end of the upper pawl 27 swings into the upper swing groove 30. When the second end of the upper pawl 27 swings into the next ratchet groove 29, the upper torsion spring 28 acts to make the second end of the upper ratchet and the corresponding ratchet groove 29 engage with each other.

[0033] In this way, the ground circulation pump starts the pump to increase pressure and stops the pump to release pressure in the upper joint 3, causing the upper piston rod 6 and the lower piston rod 8 to move up and down, and finally causing the motor installed on the lower joint 2 to rotate in one direction.

[0034] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figures 1 to 5 As shown, the second clutch mechanism includes a lower core shaft 31, a lower flywheel shaft 32, a lower end cover 33, a lower rotating shaft 34, a lower pawl 35 and a lower torsion spring 36. The outer side of the central shaft 1 corresponding to the position below the upper end cover 25 and the upper inner side of the lower flywheel shaft 32 are sealed and fixed together. The lower core shaft 31 is sealed and fixed on the lower inner side of the lower flywheel shaft 32 corresponding to the lower end position of the central shaft 1. A fifth limiting ring platform 37 is fixed on the upper outer side of the lower core shaft 31 corresponding to the position below the lower flywheel shaft 32. The lower end cover 33 is installed on the upper end of the fifth limiting ring platform 37. The lower end of the lower flywheel shaft 32 is evenly spaced along the circumference with a plurality of lower slide grooves, and each lower slide groove is provided with a lower end rotatably installed on The lower rotating shaft 34 on the upper side of the lower end cover 33 is provided with a lower swinging groove 38 connected to the lower sliding groove on the outer side of the lower flywheel shaft 32 corresponding to each lower sliding groove position, and a lower mounting groove is provided between each two adjacent lower sliding grooves, and each lower mounting groove is connected to the lower swinging groove 38 at the corresponding position, and a lower pawl 35 whose first end is fixed to the corresponding lower rotating shaft 34 is installed in each lower swinging groove 38, and a lower torsion spring 36 is installed in each lower mounting groove so that the second end of the lower pawl 35 and the corresponding ratchet groove 29 are meshed with each other. In the clockwise direction, the second end of the lower pawl 35 is located in front of the first end, and the lower end of the lower core shaft 31 is installed together with the upper end of the locking mechanism.

[0035] During use, through such an arrangement, when the upper piston rod 6 and the lower piston rod 8 move upward at the same time, the spiral sleeve 19 can be driven to move upward. When the spiral sleeve 19 moves upward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from bottom to top in the spiral guide groove 22, it drives the spiral sleeve 19 to rotate in the clockwise direction and move upward at the same time, thereby driving the upper flywheel shaft 24 to move upward and rotate in the clockwise direction. When the upper flywheel shaft 24 rotates in the clockwise direction, it drives the upper rotating shaft 26 to rotate in the clockwise direction. When the upper rotating shaft 26 rotates in the clockwise direction, the upper ratchet 27 drives the outer gear cylinder 23 to rotate in the clockwise direction. When the outer gear cylinder 23 rotates in the clockwise direction, since the lower flywheel shaft 32 is fixed by the central shaft 1, the upper core shaft 4 and the upper joint 3, when the outer gear cylinder 23 rotates, the ratchet groove 29 squeezes the second end of the lower pawl 35, so that the second end of the lower pawl 35 swings into the lower swing groove 38, and then after the outer gear cylinder 23 rotates through a ratchet groove 29, the lower pawl 35 engages with the ratchet groove 29 again under the action of the lower torsion spring 36. In this way, when the upper piston rod 6 and the lower piston rod 8 move upward at the same time, the locking mechanism and the lower joint 2 can be driven to rotate in the clockwise direction, thereby driving the motor installed on the lower joint 2 to rotate in the clockwise direction.

[0036] When the upper piston rod 6 and the lower piston rod 8 move downward at the same time, the spiral sleeve 19 can be driven to move downward. When the spiral sleeve 19 moves downward, it drives the guide block 20 to move along the guide groove 22. When the guide block 20 moves from top to bottom in the spiral guide groove 22, it drives the spiral sleeve 19 to rotate in the counterclockwise direction and move downward at the same time, thereby driving the upper flywheel shaft 24 to move downward and rotate in the counterclockwise direction. When the upper flywheel shaft 24 rotates in the counterclockwise direction, since the lower flywheel shaft 32 passes through the central axis 1, The upper core shaft 4 and the upper joint 3 are fixed, and the lower pawl 35 and the ratchet groove 29 are meshed with each other under the action of the lower torsion spring 36, so that the lower pawl 35 can prevent the outer gear cylinder 23 from rotating in the counterclockwise direction. At this time, the ratchet groove 29 of the outer gear cylinder 23 squeezes the upper pawl 27, so that the second end of the upper pawl 27 swings into the upper swing groove 30. When the second end of the upper pawl 27 swings into the next ratchet groove 29, the upper torsion spring 28 acts to make the second end of the upper ratchet and the corresponding ratchet groove 29 mesh with each other.

[0037] In this way, the ground circulation pump starts the pump to increase pressure and stops the pump to release pressure in the upper joint 3, causing the upper piston rod 6 and the lower piston rod 8 to move up and down, and finally causing the motor installed on the lower joint 2 to rotate in one direction.

[0038] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 3As shown, the locking mechanism includes a third connector 39, a transposition ring 40 and a transposition column 41. The inner side of the lower end of the outer gear cylinder 23 is sealed and fixedly installed with the outer side of the upper end of the third connector 39. The lower end of the third connector 39 is sealed and fixedly installed with the upper end of the lower joint. A sixth limiting ring platform 42 is fixedly installed on the outer side of the middle part of the third connector 39, which is in sealing contact with the outer side of the lower part of the lower core shaft 31. An installation ring groove is provided on the inner side of the lower part of the outer gear cylinder 23 corresponding to the position below the ratchet groove 29. A transposition ring 40 is installed in the installation ring groove, which is sleeved on the outer side of the lower core shaft 31. The fifth limiting ring platform 37 and the sixth limiting ring platform 42 are fixedly installed on the outer side of the middle part of the third connector 39. A grooved rotating guide track 43 is provided on the outer side of the lower core shaft 31 at the position between the sixth limiting ring platform 42, and at least one mounting hole connected inside and outside is evenly spaced along the circumference on the outer side of the transposition ring 40, and a transposition column 41 with an end located at a corresponding position in the grooved rotating guide track 43 is fixedly installed in the mounting hole. When the transposition column 41 moves in the grooved rotating guide track 43, it can make the sixth limiting ring platform 42 move up and down, and at least one fourth connecting hole 44 connected inside and outside is evenly spaced along the circumference on the outer side of the lower end of the lower core shaft 31 at the position between the sixth limiting ring platform 42 and the transposition ring 40.

[0039] According to the requirements, the rack groove is an existing well-known technology, such as the announcement number CN211058759U, named as the grooved rotating guide rail in the forward and reverse circulation internal blowout prevention device. During use, through such an arrangement, when it is necessary to adjust the direction of the motor installed on the lower joint 2, the pressure of the fluid in the upper joint 3 is increased, and the high-pressure fluid flows into the third limit ring platform 14 through the fourth connecting hole 44, and acts on the lower end of the third limit ring platform 14, so that the upper end of the third limit ring platform 14 compresses the second elastic reset member 10, and the lower piston rod 8 moves upward. At the same time, the fluid passes through the gap between the central axis 1 and the outer gear cylinder 23 and flows into the lower end of the second limit ring platform 13 through the second connecting hole 16, and acts on the second limit ring platform 13, so that the upper end of the second limit ring platform 13 compresses the first elastic reset member 9, and the upper piston rod 6 moves upward, and finally the third connecting head 39 moves upward and rotates in the clockwise direction. When the third connecting head 39 moves upward, it pushes the transposition ring 40 to move upward, and when the transposition ring 40 moves upward, it drives the transposition column 41 on the grooved rotating guide track. 43 moves upward and rotates at the same time. When the fluid pressure in the upper joint 3 decreases, the upper piston rod 6 and the lower piston rod 8 move downward, and finally the third connecting head 39 moves downward and rotates in the clockwise direction. When the third connecting head 39 moves downward, the transposition column 41 moves downward in the grooved rotary guide track 43, so that the fourth connecting hole 44 is located below the sixth limiting ring platform 42, so that the sixth limiting ring platform 42 is in sealing contact with the lower core shaft 31, that is, the fourth connecting hole 44 is closed. After the high-pressure fluid is pumped into the lower joint 2 again, the high-pressure fluid cannot flow into the lower end surface of the third limiting ring platform 14 through the fourth connecting hole 44 and act on the third limiting ring platform 14, nor can it flow into the lower end surface of the second limiting ring platform 13 and act on the second limiting ring platform 13. In this way, the upper piston rod 6 and the lower piston rod 8 cannot move up and down, so that the driving component cannot move and the lower joint 2 rotates.

[0040] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figures 1 to 5 As shown, the rotation angle of the transposition column 41 when moving in the groove type rotary guide track 43 is the same as the angle of the spiral sleeve 19 driven to rotate in the clockwise direction when the guide block 20 moves upward along the guide groove 22, both of which are between 10 and 60 degrees.

[0041] According to the requirements, the rotation angle of the transposition column 41 when moving in the groove type rotary guide track 43 is the same as the angle at which the spiral sleeve 19 is driven to rotate in the clockwise direction when the guide block 20 moves upward along the guide groove 22, both of which are 30 degrees. During use, through such a setting, the rotation angle of the lower joint 2 can be controlled by the internal and external pressure difference, which is convenient for controlling the rotation direction of the motor installed on the lower joint 2.

[0042] Embodiment 8: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, the upper end of the first limiting ring 11 is provided with a guide sleeve 45 whose lower end outer side is fixedly installed with the inner side of the upper piston cylinder 5 , and the upper end outer side of the guide sleeve 45 is sleeved on the lower outer side of the upper joint 3 .

[0043] During use, such an arrangement can prevent the upper piston cylinder 5 from colliding with the upper joint 3 when moving upward, and can also protect the first limit ring 11, thereby reducing the maintenance cost of the upper core shaft 4 and the upper piston cylinder 5.

[0044] Embodiment 9: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, at least one buffer pad 46 is installed between the lower end of the guide sleeve 45 and the upper end of the first limiting ring 11. According to the requirements, the buffer pad 46 is a copper buffer pad 46. During use, through such a setting, the wear between the guide sleeve 45 and the upper end of the first limiting ring 11 can be reduced, and the maintenance cost can be reduced.

[0045] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A coiled tubing drilling motor steering gear, characterized in that It includes a hollow central shaft and a driving assembly, a conversion assembly, a first clutch mechanism, a second clutch mechanism, a locking mechanism and a lower joint which are sequentially installed on the outer side of the central shaft from top to bottom; The driving assembly can cause the conversion assembly to rotate outside the central axis after reciprocating up and down outside the central axis; After the conversion assembly rotates, the lower joint can be rotated at a certain angle through the first clutch mechanism; The second clutch mechanism can make the lower joint rotate in a clockwise direction and at a certain angle after the conversion assembly rotates; After the locking mechanism is actuated, the driving assembly can be prevented from reciprocating up and down.

2. The coiled tubing drilling motor steering device according to claim 1, characterized in that The driving assembly includes an upper joint, an upper core shaft, an upper piston cylinder, an upper piston rod, a lower piston cylinder, a lower piston rod, a first elastic reset and a second elastic reset member. The inner side of the lower end of the upper joint and the outer side of the upper end of the upper core shaft are sealed and fixed together, a first limiting ring is fixed to the outer side of the upper part of the upper core shaft, the lower end of the upper core shaft and the upper end of the center shaft are sealed and fixed together, the outer side of the first limiting ring is sleeved with an upper piston cylinder whose upper end is located below the upper joint, the inner side of the lower end of the upper piston cylinder and the outer side of the upper end of the first connecting head which is sealed and sleeved on the outer side of the upper core shaft are sealed and fixed together, the outer side of the lower end of the first connecting head and the inner side of the upper end of the lower piston cylinder which is sleeved on the outer side of the lower part of the upper core shaft are fixed together, an upper piston rod with its lower end located below the first connecting head is sleeved between the inner side of the first connecting head and the outer side of the upper core shaft, and a sealing sleeve is fixed on the upper end of the upper piston rod corresponding to the upper end position of the first connecting head, which is sleeved on the inner side of the upper piston cylinder and the outer side of the upper core shaft. The cam is provided with a second limit stop ring, a first elastic reset piece is provided between the upper end of the second limit stop ring and the lower end of the first limit stop ring, the outer side of the lower piston rod lower end is sealed and fixed together, the lower piston rod lower end and the upper part of the conversion assembly are installed together, the outer side of the upper end of the lower piston rod is fixed with a third limit stop ring which is in sealing contact with the inner side of the lower piston cylinder, and a second elastic reset piece is installed between the upper end of the third limit stop ring and the inner side of the lower part of the first connecting head corresponding to the outer side of the upper part of the upper piston cylinder between the first limit stop ring and the second limit stop ring, at least one first connecting hole connected inside and outside is distributed along the circumferential interval at the outer side of the upper part of the upper piston rod at the position below the second limit stop ring, and at least one third connecting hole connected inside and outside is distributed along the circumferential interval at the outer side of the upper part of the lower piston cylinder between the first connecting head and the third limit stop ring.

3. The coiled tubing drilling motor steering device according to claim 2 is characterized in that The conversion assembly includes a second connecting head, a spiral sleeve and a guide block. The inner side of the lower end of the lower piston cylinder is sealed and fixedly installed with the outer side of the upper end of the second connecting head coaxially mounted on the outer side of the lower piston rod. The lower end of the second connecting head is installed together with the outer upper end of the first clutch mechanism. A fourth limiting ring is fixed to the inner side of the upper part of the lower piston rod corresponding to the lower end position of the upper piston rod. The outer side of the upper end of the central shaft and the outer side of the lower end of the upper core shaft corresponding to the lower end position of the fourth limiting ring are sealed and fixedly installed together. At least one spiral guide groove is evenly distributed along the circumference on the outer side of the upper part of the central shaft. A spiral sleeve mounted on the outer side of the central shaft is fixedly installed on the outer side of the lower end of the lower piston rod. The lower end of the spiral sleeve is installed together with the inner upper end of the first clutch mechanism. A guide block is fixed to the inner side of the lower end of the spiral sleeve corresponding to each guide groove position. When the guide block moves upward along the guide groove, it drives the spiral sleeve to rotate in a clockwise direction.

4. The coiled tubing drilling motor steering device according to claim 3 is characterized in that The first clutch mechanism includes an outer gear cylinder, an upper flywheel shaft, an upper end cover, an upper rotating shaft, an upper pawl and an upper torsion spring. The outer side of the lower part of the second connector and the inner side of the upper part of the outer gear cylinder are sealed and fixed together. The lower end of the outer gear cylinder is installed together with the upper end of the outer part of the locking mechanism. The inner side of the outer gear cylinder is evenly distributed along the circumference. The outer side of the lower end of the spiral sleeve and the inner side of the upper end of the upper flywheel shaft coaxially mounted between the outer side of the central shaft and the inner side of the outer gear cylinder are fixed together. The lower end of the upper flywheel shaft is provided with an upper end cover mounted on the outer side of the central shaft. The lower end of the upper flywheel shaft is evenly distributed along the circumference with a plurality of upper sliding grooves. Each upper slide groove is provided with an upper rotating shaft whose lower end is rotatably installed on the upper side of the upper end cover; an upper swinging groove connected with the upper slide groove is provided on the outer side of the upper flywheel shaft corresponding to each upper slide groove position; an upper mounting groove is provided between every two adjacent upper slide grooves; each upper mounting groove is connected with the upper swinging groove at the corresponding position; an upper pawl whose first end is fixed to the corresponding upper rotating shaft is installed in each upper swinging groove; an upper torsion spring is installed in each upper mounting groove so that the second end of the upper pawl engages with the corresponding ratchet groove; in the clockwise direction, the second end of the upper pawl is located in front of the first end.

5. The coiled tubing drilling motor steering device according to claim 4, characterized in that The second clutch mechanism includes a lower core shaft, a lower flywheel shaft, a lower end cover, a lower rotating shaft, a lower pawl and a lower torsion spring. The outer side of the central shaft corresponding to the position below the upper end cover and the inner side of the upper part of the lower flywheel shaft are sealed and fixed together. The lower core shaft is sealed and fixedly installed on the inner side of the lower part of the lower flywheel shaft corresponding to the lower end position of the central shaft. A fifth limiting ring platform is fixed on the outer side of the upper part of the lower core shaft corresponding to the position below the lower flywheel shaft. The upper end of the fifth limiting ring platform is installed with a lower end cover. The lower end of the lower flywheel shaft is evenly spaced along the circumference with a plurality of lower slide grooves, and each lower slide groove is provided with a lower end rotatably installed on the upper side of the lower end cover. A lower rotating shaft, a lower swinging groove connected to the lower groove is provided on the outer side of the lower flywheel shaft corresponding to each lower groove position, a lower mounting groove is provided between every two adjacent lower grooves, each lower mounting groove is connected to the lower swinging groove at the corresponding position, a lower pawl whose first end is fixed to the corresponding lower rotating shaft is installed in each lower swinging groove, a lower torsion spring whose second end of the lower pawl is meshed with the corresponding ratchet groove is installed in each lower mounting groove, along the clockwise direction, the second end of the lower pawl is located in front of the first end, and the lower end of the lower core shaft is installed together with the upper end of the locking mechanism.

6. The coiled tubing drilling motor steering device according to claim 5, characterized in that The locking mechanism comprises a third connector, a transposition ring and a transposition column, the inner side of the lower end of the outer gear cylinder is sealed and fixedly installed together with the outer side of the upper end of the third connector, the lower end of the third connector is sealed and fixedly installed together with the upper end of the lower joint, and the outer side of the middle portion of the third connector is fixed with a sixth limiting ring platform that is in sealing contact with the outer side of the lower portion of the lower core shaft, and an installation ring groove is provided on the inner side of the lower portion of the outer gear cylinder corresponding to the position below the ratchet groove, and a transposition ring is installed in the installation ring groove and is sleeved on the outer side of the lower core shaft corresponding to the position between the fifth limiting ring platform and the sixth limiting ring platform. The outer side of the lower core shaft corresponding to the position between the fifth limiting ring platform and the sixth limiting ring platform is provided with a groove-type rotating guide track, and at least one mounting hole connected inside and outside is evenly distributed along the circumference of the outer side of the transposition ring, and a transposition column with an end located at a corresponding position in the groove-type rotating guide track is fixedly installed in the mounting hole. When the transposition column moves in the groove-type rotating guide track, the sixth limiting ring platform can move up and down, and at least one fourth connecting hole connected inside and outside is evenly distributed along the circumference of the outer side of the lower end of the lower core shaft corresponding to the position between the sixth limiting ring platform and the transposition ring.

7. The coiled tubing drilling motor steering device according to claim 6, characterized in that The rotation angle of the transposition column when moving in the groove type rotary guide track is the same as the angle at which the spiral sleeve is driven to rotate in the clockwise direction when the guide block moves upward along the guide groove, and both are between 10 and 60 degrees.

8. The coiled tubing drilling motor steering device according to claim 2, 3, 4, 5, 6 or 7, characterized in that The upper end of the first limiting ring platform is provided with a guide sleeve whose lower end outer side is fixedly installed with the inner side of the upper piston cylinder, and the upper end outer side of the guide sleeve is sleeved on the lower outer side of the upper joint.

9. The coiled tubing drilling motor steering device according to claim 8, characterized in that At least one buffer pad is installed between the lower end of the guide sleeve and the upper end of the first limiting ring platform.

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