CN111636815A - Downhole power drilling tool with unfreezing device - Google Patents
Downhole power drilling tool with unfreezing device Download PDFInfo
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- CN111636815A CN111636815A CN202010468445.8A CN202010468445A CN111636815A CN 111636815 A CN111636815 A CN 111636815A CN 202010468445 A CN202010468445 A CN 202010468445A CN 111636815 A CN111636815 A CN 111636815A
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- 238000005553 drilling Methods 0.000 title claims abstract description 110
- 239000012530 fluid Substances 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims description 50
- 230000005540 biological transmission Effects 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 9
- 230000003313 weakening effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 238000005086 pumping Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
- E21B31/113—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars hydraulically-operated
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
Abstract
The utility model relates to an underground power drilling tool with device that unfreezes belongs to power drilling tool technical field, includes: the power drilling tool comprises a shell and a shaft rod, wherein the shell is of a hollow tubular structure, and the shaft rod is positioned in the shell and can rotate in the shell; the unfreezing device is positioned in the shell and used for connecting the shell and the shaft rod when in a trigger state, so that the shaft rod rotates along with the shell synchronously. The utility model provides a unfreezing device does not participate in work when power drill normally drills well operation in pit, improves drilling fluid pump pressure when needs unfreezing after the unfreezing device is automatic to link into an organic whole rotation with axostylus axostyle and casing. The releasing device is positioned on the shaft lever in the shell and has compact structure, small weakening on the structural strength of the shaft lever, small stress of the shaft lever and long service life. Set up the unfreezing device between casing and the axostylus axostyle, the casing upper end links to each other with the drilling rod, can pass through the drilling rod with the moment of torsion of well head carousel and transmit the casing, then transmit the moment of torsion for axostylus axostyle and drill bit through the unfreezing device, realizes the unfreezing of drill bit.
Description
Technical Field
The application relates to the technical field of power drilling tools, in particular to an underground power drilling tool with a clamping release device.
Background
In oil and gas exploitation, downhole power drilling tools are increasingly widely used, the power drilling tools drive drill bits to achieve stratum drilling, the downhole power drilling tools are driven by drilling fluid pumped in through ground equipment, during operation, the drilling fluid is pumped into the downhole power drilling tools, and the power drilling tools convert hydraulic energy into kinetic energy to drive well bottom drill bits to rotate. There are two common types of power drills: screw drills and turbine drills. For a screw drilling tool, drilling fluid enters a stator shell to drive a rotor screw eccentric to the stator shell to rotate, and the rotor screw drives a universal shaft and a transmission shaft connected with the rotor screw to rotate, so that a drill bit at the lower end of the drilling tool is driven to rotate. The turbine drilling tool adopts one-stage or multi-stage turbine sections to provide torque for a drill bit at the lower end of the drilling tool, each stage is composed of a stator which does not move and a rotor which rotates, the rotor is connected with a shaft, drilling fluid is guided into the rotor by the stator, and rotor blades rotate under the action of the drilling fluid to provide torque for the drill bit at the lower end of the drilling tool.
During the drilling process, the drill bit may be blocked during the rock cutting process, and when the drill bit is in abnormal conditions such as severe stick-slip and well wall collapse, the drill bit is blocked. After the drill is stuck, the torque of the ground turntable is increased, the ground turntable drives the drill rod to rotate, and the drill bit is stuck off when the torque is large enough. However, this method is not suitable for use in a drilling assembly having a motor downhole because the conventional motor structure is not capable of transmitting stator housing torque to the drill bit.
Under the condition that a power drilling tool is arranged at the bottom of a well, common methods for releasing the stuck state include methods such as drawing, shocking, acid soaking and the like, for example, a certain tensile force is generated on the stuck part by lifting a drill rod to force a drill bit to pass through the stuck part, a certain impact force is generated by a jar, after rock is vibrated and loosened, the drill bit is lifted to pass through the stuck part, and then the releasing of the stuck state is realized. However, the above-mentioned unfreezing method has poor reliability, and once the unfreezing fails, the only option is to break out the safe joint, leave the drill bit, the power drill and the MWD at the bottom of the well, and then salvage the drill bit, the power drill and the MWD. When fishing fails, well filling and sidetracking are required. When this occurs, fishing, filling and window sidetracking add to the cost of expensive drilling operations, in addition to the loss of tools due to part of the drill assembly remaining downhole.
Disclosure of Invention
The embodiment of the application provides an underground power drilling tool with a releasing device, and aims to overcome the defects that in the related technology, the releasing reliability of the power drilling tool is poor and the drilling operation cost is high.
The embodiment of the application provides a downhole motor with unfreeze and put, include:
the power drill comprises a shell and a shaft rod, wherein the shell is of a hollow tubular structure, and the shaft rod is positioned in the shell and can rotate in the shell;
the unlocking device is positioned in the shell and is used for connecting the shell and the shaft rod in a trigger state so as to enable the shaft rod to rotate synchronously along with the shell.
In some embodiments, the unfreezing apparatus includes:
the telescopic mechanism is arranged on the side wall of the shaft rod;
the blocking structure is positioned on the inner wall of the shell;
and the valve mechanism is positioned at one end of the shaft rod and used for leading the drilling fluid to the telescopic mechanism to drive the telescopic mechanism to extend out when the pressure of the drilling fluid on the shaft rod reaches a set value, and is matched with the stop structure to limit the relative rotation of the shell and the shaft rod.
In some embodiments, the valve mechanism comprises:
a valve housing;
the valve core is sleeved in the valve sleeve, a resistance surface facing the flowing direction of drilling fluid is arranged at the tail end of the valve core, and a third spring for driving the valve sleeve and the valve core to be away from each other is arranged between the valve sleeve and the valve core; at the same time, the user can select the desired position,
the valve sleeve and the valve core are both provided with through holes, and the positions of the through holes on the valve sleeve and the valve core are configured as follows: when the valve core moves towards the valve sleeve, the valve core can be mutually overlapped, and the space in the valve core is communicated with the area where the telescopic mechanism is located.
In some embodiments, the telescoping mechanism comprises:
the piston cylinder is positioned at the through hole of the valve sleeve;
the piston rod is assembled in the piston cylinder and faces the through hole of the valve sleeve; at the same time, the user can select the desired position,
and a first spring for driving the piston rod to retract is arranged between the piston rod and the piston cylinder.
In some embodiments, the inner wall of the piston cylinder is provided with a limiting hole, a locking pin for limiting the piston rod is arranged in the limiting hole, an annular groove matched with the locking pin is arranged on the side wall of the piston rod, and a second spring for driving the locking pin to move towards the piston rod is arranged in the limiting hole.
In some embodiments, a first limiting ring is arranged on the inner wall of the piston cylinder, the first limiting ring is located at one end close to the housing, a second limiting ring is arranged on the outer wall of the piston rod, the second limiting ring is located at one end far away from the housing, the first spring is installed between the first limiting ring and the second limiting ring, and a counter bore is arranged at one end, far away from the housing, of the piston rod.
In some embodiments, the inner wall of the valve core is provided with a liquid inlet hole, the inner diameter of the liquid inlet hole is smaller than that of the valve core, a first sealing ring is arranged between the outer wall of the valve core and the shaft rod, and a second sealing ring is arranged between the outer wall of the valve core and the inner wall of the valve sleeve.
In some embodiments, a stepped hole for installing a pin is formed in the side wall of the shaft rod, the pin is connected to the stepped hole in a threaded manner, a sealing gasket is arranged between the pin and the stepped hole, a guide groove is formed in the outer wall of the valve core, the length direction of the guide groove is parallel to the axial direction of the valve core, and one end of the pin is located in the guide groove.
In some embodiments, the number of the telescopic mechanisms is multiple, the multiple telescopic mechanisms are uniformly arranged along the circumferential direction of the shaft rod, the number of the stop structures is multiple, the multiple stop structures are uniformly arranged along the circumferential direction of the shell, the stop structures are axial grooves formed in the inner wall of the shell, and the length direction of the axial grooves is parallel to the axial direction of the shell.
In some embodiments, the casing includes anti-falling casing, stator casing, cardan shaft casing and transmission shaft casing that threaded connection in proper order, the axostylus axostyle includes anti-falling pole, rotor screw rod, cardan shaft and the transmission shaft of threaded connection in proper order, the unfreezing device sets up on anti-falling pole, cardan shaft or transmission shaft, the top of anti-falling casing is equipped with the first screw hole of connecting the drilling rod, the bottom of transmission shaft is equipped with the second screw hole of connecting the drill bit.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides an underground power drilling tool with a de-clamping device, and the underground power drilling tool is provided with the power drilling tool and the de-clamping device. The power drilling tool comprises a shell and a shaft rod, wherein the shell is of a hollow tubular structure, and the shaft rod is positioned in the shell and rotates relative to the shell; the unfreezing device is located in the shell, and when the unfreezing is needed, the unfreezing device is used for connecting the shell and the shaft rod when the trigger state is achieved, so that the shaft rod rotates synchronously along with the shell, the unfreezing device transmits the torque of the shell to the shaft rod and the drill bit, and the drill bit is reliably and quickly unfreezed.
Consequently, the device that unfreezes does not participate in work when the normal drilling operation of power drilling tool in pit of this application, improves the drilling fluid pump pressure when needs unfreeze and then the device that unfreezes is triggered, and the device that unfreezes connects casing and axostylus axostyle when the state of triggering to make the axostylus axostyle follow the synchronous rotation of casing, the device that unfreezes transmits the moment of torsion of casing for axostylus axostyle and drill bit, realizes the reliable quick unfreezing of drill bit. The releasing device is positioned on the shaft lever in the shell and has compact structure, small weakening on the structural strength of the shaft lever, small stress of the shaft lever and long service life. The utility model provides an underground power drilling tool is through setting up the unfreezing device between casing and axostylus axostyle, and the casing upper end links to each other with the drilling rod, can pass through the drilling rod with the moment of torsion of well head carousel and transmit the casing, then transmits the moment of torsion for axostylus axostyle and drill bit through the unfreezing device, realizes the quick unfreezing of drill bit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of the structure of an embodiment of the present application;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 with an embodiment of the present application in an unlatched condition;
FIG. 3 is a cross-sectional view taken along A-A of FIG. 1 in an unlatched condition of an embodiment of the present application;
FIG. 4 is a partial enlarged view of the embodiment of the present application at I in FIG. 1 in an un-stuck state;
FIG. 5 is an enlarged view of a portion of FIG. 4 at II;
fig. 6 is a partially enlarged view of fig. 1 at i in the stuck-open state of the embodiment of the present application.
Reference numerals:
10-power drill, 10 a-shaft rod, 10 b-shell, 20-unfreezing device, 20 a-telescoping mechanism, 20 b-valve mechanism;
100-a first threaded hole, 101-an anti-drop housing, 102-an anti-drop rod, 103-a stator housing, 104-a rotor screw, 105-a cardan shaft housing, 106-a cardan shaft, 107-a transmission shaft housing, 108-a transmission shaft, 109-a second threaded hole, 110-a drilling fluid channel hole, 111-a stop structure, 112-a stepped hole;
201-piston cylinder, 202-piston rod, 203-first spring, 204-locking pin, 205-second spring, 206-annular groove, 207-counter bore;
301-valve sleeve, 302-valve core, 303-third spring, 304-first through hole, 305-second through hole, 306-first sealing ring, 307-second sealing ring, 308-pin, 309-sealing gasket, 310-liquid inlet hole, 3021-resistance surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides an underground power drilling tool with a unfreezing device, which can overcome the defects of poor unfreezing reliability and high drilling operation cost of the power drilling tool in the related technology.
Referring to fig. 1, an embodiment of the present application provides a downhole motor with a trip device, including:
the power drill 10 comprises a shell 10b and a shaft 10a, wherein the shell 10b is a hollow tubular structure, and the shaft 10a is positioned in the shell 10b and can rotate in the shell 10 b; during normal drilling construction, drilling fluid enters the housing 10b to drive the shaft 10a to rotate in the housing 10b, and the shaft 10a drives the drill bit connected with the shaft to rotate and drill.
The housing 10b includes a drop-proof housing 101, a stator housing 103, a cardan shaft housing 105, and a transmission shaft housing 107, and the shaft 10a includes a drop-proof shaft 102, a rotor screw 104, a cardan shaft 106, and a transmission shaft 108. The anti-drop shell 101, the stator shell 103, the universal shaft shell 105 and the transmission shaft shell 107 are fixedly connected in sequence through threads, and the anti-drop rod 102, the rotor screw 104, the universal shaft 106 and the transmission shaft 108 are fixedly connected in sequence through threads.
Drop prevention rods 102 are located within the drop prevention housing 101, the drop prevention rods 102 serving to prevent the rotor screw 104, the cardan shaft 106 and the transmission shaft 108 from dropping into the well. The rotor screw 104 is positioned in the stator housing 103, drilling fluid enters the stator housing 103 to drive the rotor screw 104 to eccentrically rotate in the stator housing 103, and the rotor screw 104 drives the cardan shaft 106 and the transmission shaft 108 to synchronously rotate.
A cardan shaft 106 is located in the cardan shaft housing 105, the cardan shaft 106 converting the eccentric rotational movement of the rotor screw 104 into a coaxial rotational movement of the transmission shaft 108. A drive shaft 108 is located within the drive shaft housing 107, the drive shaft 108 being adapted to couple to and rotationally drive the drill bit.
A first threaded hole 100 for connecting a drill rod (not shown) is formed at the top of the drop-proof housing 101, and a second threaded hole 109 for connecting a drill bit (not shown) is formed at the bottom of the transmission shaft 108.
The releasing device 20, the releasing device 20 is disposed on the universal shaft 106 in the universal shaft housing 105, but it is also possible for one skilled in the art to dispose the releasing device on the rotor screw 104 in the stator housing 103, the releasing device on the transmission shaft 108 in the transmission shaft housing 107, or the releasing device on the anti-drop rod 102 in the anti-drop housing 101. For convenience of description of the embodiments of the present application, the present embodiment will be described in detail by taking an example in which the jam clearing device 20 is disposed on the universal shaft 106 in the universal shaft housing 105.
The jam release device 20 is provided on the cardan shaft 106 within the cardan shaft housing 105, the jam release device 20 being used to connect the cardan shaft housing 105 and the cardan shaft 106 in the activated state. When the drill bit is jammed, the jam release device 20 is triggered, and the jam release device 20 is used for connecting the universal shaft 106 and the universal shaft shell 105 so that the universal shaft 106 can rotate synchronously along with the universal shaft shell 105. The unfreezing device 20 transmits the torque of the universal shaft shell 105 to the universal shaft 106 and the drill bit, and reliable and quick unfreezing of the drill bit is achieved.
The stuck releasing device 20 does not participate in the operation of the power drill 10 during normal drilling operation, the cardan shaft 106 and the cardan shaft housing 105 are relatively independent, and the cardan shaft 106 and the cardan shaft housing 105 cannot be connected together to rotate. Improve the drilling fluid pump pressure when the drill bit card hinders and need to unfreeze the card after the device 20 of unfreezing is triggered, the device 20 of unfreezing connects into an organic whole synchronous revolution with cardan shaft 106 and cardan shaft casing 105 automatically, the top of preventing falling casing 101 links to each other with the drilling rod, can pass through the drilling rod with the moment of torsion of well head carousel and transmit to casing 10b, then casing 10b transmits the moment of torsion to cardan shaft 106, transmission shaft 108 and drill bit through the device 20 of unfreezing, the moment of torsion of increase drill bit, realize the unfreezing of drill bit.
In some alternative embodiments, referring to fig. 1 to 4, the present application provides a downhole motor with a trip device 20, wherein the trip device 20 includes three sets of telescoping mechanisms 20a and valve mechanisms 20b, and the telescoping mechanisms 20a are preferably, but not limited to, three sets of telescoping mechanisms 20a are arranged on the side wall of the cardan shaft 106 in a circumferentially uniform manner. Three radial holes for mounting the telescopic mechanisms 20a are formed in the side wall of the universal shaft 106, the number of the radial holes is the same as that of the telescopic mechanisms 20a, and the axes of the radial holes are perpendicular to the axis of the universal shaft 106. One end of the universal shaft 106 is provided with an axial hole for mounting the valve mechanism 20b, the axis of the axial hole is collinear with the axis of the universal shaft 106, and all three radial holes are communicated with the axial hole.
The inner wall of the universal shaft housing 105 is provided with three stop structures 111 connected with the telescopic mechanism 20a, and the three stop structures 111 are uniformly distributed and arranged along the circumference of the inner wall of the universal shaft housing 105. The stop structure 111 is preferably, but not limited to, an axial groove opened on the inner wall of the universal shaft housing 105, and the length direction of the axial groove is parallel to the axial direction of the universal shaft housing 105.
The side wall of the universal shaft 106 is provided with a drilling fluid channel hole 110, and the valve mechanism 20b is used for guiding the drilling fluid in the drilling fluid channel hole 110 to the telescopic mechanism 20a to drive the telescopic mechanism 20a to extend out when the pressure of the drilling fluid on the side wall reaches a set value, and is matched with the stop structure 111 to limit the relative rotation of the universal shaft shell 105 and the universal shaft 106.
In some alternative embodiments, referring to fig. 2 to 4 and 6, the present application provides a downhole motor with a trip device, the valve mechanism 20b of the downhole motor comprises a valve sleeve 301 and a valve core 302 arranged in the valve sleeve 301, and the valve sleeve 301 and the valve core 302 are both hollow tubular structures. The valve sleeve 301 is fixedly installed in the axial hole, one end of the valve core 302 is sleeved in the valve sleeve 301, and the valve core 302 can move back and forth in the valve sleeve 301 along the axial direction of the valve sleeve 301.
A resistance surface 3021 facing the flow direction of the drilling fluid is arranged at the tail end of the valve core 302, and when the drilling fluid pressure reaches a set value, the drilling fluid drives the valve core 302 to move by driving the resistance surface 3021 at the tail end of the valve core 302. A third spring 303 that drives the spool 302 to move linearly with respect to the valve housing 301 is provided between the valve housing 301 and the spool 302.
Through holes are formed in the valve sleeve 301 and the valve core 302, and the positions of the through holes in the valve sleeve 301 and the valve core 302 are configured as follows: the valve cores 302 overlap when moving towards the valve sleeve 301 and communicate the space inside the valve cores 302 with the area where the telescopic mechanism 20a is located.
The through holes specifically include a first through hole 304 and a second through hole 305, the number of the first through hole 304 and the number of the second through hole 305 are three, and the positions of the first through hole 304 and the second through hole 305 correspond to the position of the telescopic mechanism 20 a. Three first through holes 304 are circumferentially and uniformly distributed on the side wall of the valve sleeve 301, and three second through holes 305 are circumferentially and uniformly distributed on the side wall of the valve core 305.
When the jam release operation is not required, the valve sleeve 301 and the valve core 302 are in the first working position, that is, the first through hole 304 on the valve sleeve 301 and the second through hole 305 on the valve core 302 are not communicated with each other. When the jam release operation is required, the valve sleeve 301 and the valve core 302 are in the second position, that is, the first through hole 304 and the second through hole 305 are overlapped and communicated with each other after the valve core 302 moves to the set position in the valve sleeve 301. After the first through hole 304 and the second through hole 305 are communicated, the drilling fluid enters the first through hole 304 and the second through hole 305 from the drilling fluid channel hole 110, the drilling fluid in the first through hole 304 and the second through hole 305 enters the area where the telescopic mechanism 20a is located, and the drilling fluid drives the telescopic mechanism 20a to extend out and to be matched with the stop structure 111.
When the stuck pipe needs to be unlocked, the pumping pressure of the drilling fluid is increased, when the pressure of the drilling fluid reaches a set value, the valve mechanism 20b is firstly driven to do linear motion in the axial hole, and the drilling fluid flow passage hole 110 is communicated with the through hole when the valve mechanism 20b moves to a set position in the axial hole. Drilling fluid enters the through hole from the drilling fluid flow passage hole 110, the drilling fluid in the through hole drives the telescopic mechanism 20a to extend out and match with the stop structure 111, the telescopic mechanism 20a and the stop structure 111 connect the universal shaft shell 105 and the universal shaft 106 into a whole to rotate, and the universal shaft 106 drives the transmission shaft 108 and the drill bit to rotate together. The universal shaft 106 and the universal shaft housing 105 outside the universal shaft 106 cannot rotate relatively, the torque of the wellhead turntable is transmitted to the universal shaft housing 105 through the drill rod, and the torque is transmitted to the universal shaft 106 through the universal shaft housing 105, so that the drill bit is unlocked.
If the telescopic mechanism 20a is not completely matched and connected with the stop structure 111 when extending out, the drill rod and the universal shaft shell 105 are driven to rotate and align through the wellhead turntable, and the universal shaft shell 105 slowly rotates for 2-3 circles to match the telescopic mechanism 20a and the stop structure 111 together to realize alignment while rotating and aligning.
In some alternative embodiments, referring to fig. 2 to 4, the present application provides a downhole motor with a trip device, the telescoping mechanism 20a of the downhole motor comprises a piston cylinder 201 at a first through hole 304 of a valve housing 301, a piston rod 202 assembled in the piston cylinder 201, and the piston rod 202 faces the first through hole 304 of the valve housing 301. The piston cylinder 201 is a hollow tubular structure, and the piston cylinder 201 is fixedly installed in a radial hole. The piston rod 202 is free to move telescopically in the piston cylinder 201, and a first spring 203 for driving the piston rod 202 to retract is arranged between the piston rod 202 and the piston cylinder 201.
The outer wall of the piston cylinder 201 is provided with an external thread, an internal thread is arranged in the radial hole, the piston cylinder 201 is fixedly connected with the radial hole through the thread, and the sealing performance of the connection between the piston cylinder 201 and the radial hole is guaranteed.
A first limit ring is arranged on the inner wall of the piston cylinder 201 and is positioned at one end close to the universal shaft shell 105; a second limit ring is arranged on the outer wall of the piston rod 202, and the second limit ring is located at one end far away from the universal shaft housing 105. The first spring 203 is installed between the first limit ring and the second limit ring, and the first limit ring and the second limit ring provide installation space and positioning for the first spring 203, so that the first spring 203 can drive the piston rod 202 to retract.
A counter bore 207 is provided at the end of the piston rod 202 remote from the cardan shaft housing 105, the counter bore 207 communicates with the first through hole 304, drilling fluid enters the first through hole 304 and the second through hole 305 from the drilling fluid passage hole 110, and the drilling fluid enters the counter bore 207 of the piston rod 202 to drive the piston rod 202 to move outward and extend.
When the stuck state needs to be released, the pumping pressure of the drilling fluid is increased, the valve mechanism 20b is driven to move linearly in the axial hole when the pressure of the drilling fluid reaches a set value, and the drilling fluid channel hole 110 is communicated with the first through hole 304 and the second through hole 305 when the valve mechanism 20b moves to a set position in the axial hole. The drilling fluid entering the first through hole 304 and the second through hole 305 enters the counter bore 207 of the piston rod 202, and the drilling fluid drives the piston rod 202 to extend outwards in the piston cylinder 201 to be connected with the stop structure 111 in a matching manner. After the unfreezing is successful, the pumping pressure of the drilling fluid is reduced, the first spring 203 drives the piston rod 202 to retract into the piston cylinder 201, the piston rod 202 is separated from the stop structure 111, and normal drilling operation of the underground power drilling tool can be resumed.
In some optional embodiments, referring to fig. 2 to 5, the present application provides a downhole motor with an unlocking device, an inner wall of a piston cylinder 201 of the downhole motor is provided with a plurality of limiting holes, the plurality of limiting holes are uniformly distributed along the circumference of the inner wall of the piston cylinder 201, and an axis of each limiting hole is perpendicular to an axis of the piston cylinder 201.
The limiting holes are movably connected with locking pins 204, the side wall of the piston rod 202 is provided with annular grooves 206 which are used for being connected with the locking pins 204 in a buckling mode, and the width of each annular groove 206 is larger than the diameter of each locking pin 204. A second spring 205 for driving the locking pin 204 to move towards the piston rod 202 is arranged in the limiting hole, and after the piston rod 202 extends outwards to a set position in the piston cylinder 201, the second spring 205 drives the locking pin 204 to be in snap-fit connection with the annular groove 206.
After the annular groove 206 of the piston rod 202 is clamped by the locking pin 204, the piston rod 202 cannot retract in the piston cylinder 201, so that the pumping pressure of the drilling fluid is recovered to be normal or the piston rod 202 cannot retract after the pumping is stopped.
In some alternative embodiments, referring to fig. 4, the present application provides a downhole motor with a releasing device, the inner wall of the valve core 302 of the downhole motor is provided with a liquid inlet hole 310, and the inner diameter of the liquid inlet hole 310 is smaller than the inner diameter of the valve core 302. When the unfreezing operation is needed, the pumping pressure of the drilling fluid is increased, and the drilling fluid enters the liquid inlet hole 310 from the drilling fluid flow passage hole 110. The inner diameter of the liquid inlet hole 310 is smaller than that of the valve core 302, so that the drilling fluid can push the valve core 302 to move downwards along the axis of the valve sleeve 301 to a set position, and the first through hole 304 and the second through hole 305 can be communicated. The drilling fluid in the first through hole 304 and the second through hole 305 enters the counter bore 207 of the piston rod 202, and the drilling fluid drives the piston rod 202 to extend outwards in the piston cylinder 201 to be connected with the stop structure 111 in a matching manner.
A first sealing ring 306 is arranged between the outer wall of the valve core 302 and the axial hole, a second sealing ring 307 is arranged between the outer wall of the valve core 302 and the inner wall of the valve sleeve 301, and the first sealing ring 306 and the second sealing ring 307 are used for improving the sealing performance of the valve core 302 and the valve sleeve 301, so that the leakage of drilling fluid is prevented.
In some alternative embodiments, referring to fig. 4, the present application provides a downhole motor with a trip device, the sidewall of the universal shaft 106 of the downhole motor is provided with a stepped hole 112 for installing a pin 308, and the pin 308 is connected to the inner thread of the stepped hole 112. A seal 309 is disposed between the pin 308 and the stepped hole 112. The outer wall of the other end of the valve core 302 is provided with a guide groove, the length direction of the guide groove is parallel to the axial direction of the valve core 302, the width of the guide groove is larger than the diameter of the pin 308, one end of the pin 308 is positioned in the guide groove, and the length of the guide groove is larger than the diameters of the first through hole 304 and the second through hole 305.
The guide groove and the pin 308 are used for providing circumferential limit for the valve core 302 and preventing the valve core 302 from rotating in the valve sleeve 301, and meanwhile, the guide groove and the pin 308 can also provide axial limit for the valve core 302, so that the valve core 302 is ensured to stop moving after linearly moving to a set position in the valve sleeve 301, and the first through hole 304 and the second through hole 305 are ensured to be communicated after the valve core 302 linearly moves downwards in the valve sleeve 301 to the set position.
Principle of operation
The embodiment of the application provides a downhole power drilling tool with a de-jamming device, and the downhole power drilling tool does not participate in working when the downhole power drilling tool is in normal drilling operation, a universal shaft 106 and a universal shaft shell 105 are relatively independent, and the universal shaft 106 and the universal shaft shell 105 cannot be connected together to rotate.
When the jam release is needed, the pumping pressure of the drilling fluid is increased, the drilling fluid enters the jam release device 20 from the drilling fluid channel hole 110, the pressure of the drilling fluid is increased, the valve mechanism 20b is driven to move linearly in the axial hole, and the drilling fluid channel hole 110 is communicated with the through hole when the valve mechanism 20b moves to a set position in the axial hole. Drilling fluid enters the through hole from the drilling fluid channel hole 110, and the drilling fluid in the through hole drives the telescopic mechanism 20a to extend out and be in fit connection with the stop structure 111.
The telescopic mechanism 20a and the stop structure 111 connect the universal shaft housing 105 and the universal shaft 106 to rotate integrally, and the universal shaft 106 drives the transmission shaft 108 and the drill bit to rotate together. The universal shaft 106 and the universal shaft housing 105 outside the universal shaft 106 cannot rotate relatively, the torque of the wellhead turntable is transmitted to the universal shaft housing 105 through the drill rod, and the torque is transmitted to the universal shaft 106 through the universal shaft housing 105, so that the drill bit is unlocked.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A downhole motor with a trip device, comprising:
the power drill (10), the power drill (10) comprises a shell (10b) and a shaft rod (10a), the shell (10b) is a hollow tubular structure, and the shaft rod (10a) is positioned in the shell (10b) and can rotate in the shell (10 b);
the unlocking device (20) is located in the shell (10b), and the unlocking device (20) is used for connecting the shell (10b) and the shaft rod (10a) in a trigger state so that the shaft rod (10a) rotates along with the shell (10b) synchronously.
2. A downhole motor with an unfreezing device according to claim 1, wherein the unfreezing device (20) comprises:
a telescopic mechanism (20a) mounted on the side wall of the shaft lever (10 a);
a stop structure (111) located on the inner wall of the shell (10 b);
the valve mechanism (20b) is positioned at one end of the shaft rod (10a), and the valve mechanism (20b) is used for leading the drilling fluid to the telescopic mechanism (20a) to drive the telescopic mechanism (20a) to extend out when the pressure of the drilling fluid on the shaft rod reaches a set value, and is matched with the stopping structure (111) to limit the relative rotation of the shell (10b) and the shaft rod (10 a).
3. A downhole motor with a unfreezing device according to claim 2, wherein the valve mechanism (20b) comprises:
a valve housing (301);
the valve core (302) is sleeved in the valve sleeve (301), a resistance surface (3021) facing the flow direction of drilling fluid is arranged at the tail end of the valve core (302), and a third spring (303) used for driving the valve sleeve (301) and the valve core (302) to be away from each other is arranged between the valve sleeve (301) and the valve core (302); at the same time, the user can select the desired position,
through holes are formed in the valve sleeve (301) and the valve core (302), and the positions of the through holes in the valve sleeve (301) and the valve core (302) are configured as follows: when the valve core (302) moves towards the valve sleeve (301), the valve core and the valve sleeve can be overlapped, and the space in the valve core (302) is communicated with the area where the telescopic mechanism (20a) is located.
4. A downhole motor with an unfreezing device according to claim 3, wherein the telescoping mechanism (20a) comprises:
a piston cylinder (201) positioned at the through hole of the valve sleeve (301);
a piston rod (202) assembled in the piston cylinder (201), wherein the piston rod (202) faces the through hole of the valve sleeve (301); at the same time, the user can select the desired position,
a first spring (203) for driving the piston rod (202) to retract is arranged between the piston rod (202) and the piston cylinder (201).
5. The downhole motor with a trip device of claim 4, wherein:
the piston is characterized in that a limiting hole is formed in the inner wall of the piston cylinder (201), a locking pin (204) limiting the piston rod (202) is arranged in the limiting hole, an annular groove (206) matched with the locking pin (204) is formed in the side wall of the piston rod (202), and a second spring (205) driving the locking pin (204) to move towards the piston rod (202) is arranged in the limiting hole.
6. The downhole motor with a trip device of claim 4, wherein:
be equipped with first spacing ring on the inner wall of piston cylinder (201), first spacing ring is located the one end that is close casing (10b), be equipped with the second spacing ring on the outer wall of piston rod (202), the second spacing ring is located the one end of keeping away from casing (10b), install between first spacing ring and second spacing ring first spring (203), the one end that casing (10b) were kept away from in piston rod (202) is equipped with counter bore (207).
7. The downhole motor with a trip device of claim 3, wherein:
the inner wall of the valve core (302) is provided with a liquid inlet hole (310), the inner diameter of the liquid inlet hole (310) is smaller than that of the valve core (302), a first sealing ring (306) is arranged between the outer wall of the valve core (302) and the shaft rod (10a), and a second sealing ring (307) is arranged between the outer wall of the valve core (302) and the inner wall of the valve sleeve (301).
8. The downhole motor with a trip device of claim 3, wherein:
the side wall of the shaft rod (10a) is provided with a stepped hole (112) for installing a pin (308), the stepped hole (112) is connected with the pin (308) in a threaded manner, a sealing gasket (309) is arranged between the pin (308) and the stepped hole (112), the outer wall of the valve core (302) is provided with a guide groove, the length direction of the guide groove is parallel to the axial direction of the valve core (302), and one end of the pin (308) is located in the guide groove.
9. The downhole motor with a trip device of claim 2, wherein:
the number of the telescopic mechanisms (20a) is multiple, the telescopic mechanisms (20a) are uniformly distributed and arranged along the circumferential direction of the shaft rod (10a), the number of the stop structures (111) is multiple, the stop structures (111) are uniformly distributed and arranged along the circumferential direction of the shell (10b), the stop structures (111) are axial grooves formed in the inner wall of the shell (10b), and the length direction of the axial grooves is parallel to the axial direction of the shell (10 b).
10. The downhole motor with a trip device of claim 1, wherein:
casing (10b) including threaded connection's in proper order anti-falling casing (101), stator casing (103), universal shaft casing (105) and transmission shaft casing (107), axostylus axostyle (10a) is including threaded connection's in proper order anti-falling pole (102), rotor screw (104), universal shaft (106) and transmission shaft (108), unfreezing device (20) set up on anti-falling pole (102), universal shaft (106) or transmission shaft (108), the top of anti-falling casing (101) is equipped with first screw hole (100) of connecting the drilling rod, the bottom of transmission shaft (108) is equipped with second screw hole (109) of connecting the drill bit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010468445.8A CN111636815B (en) | 2020-05-28 | 2020-05-28 | Downhole power drilling tool with unfreezing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010468445.8A CN111636815B (en) | 2020-05-28 | 2020-05-28 | Downhole power drilling tool with unfreezing device |
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| CN111636815B CN111636815B (en) | 2022-04-01 |
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| CN114352186A (en) * | 2021-08-20 | 2022-04-15 | 四川深远石油钻井工具股份有限公司 | Anti-sticking structure and anti-sticking drilling tool with same |
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