CN116201469B - Oilfield Well Drilling Link Motor and Short Radius Horizontal Drilling Method for Casing Damaged Wells - Google Patents

Abstract

The application provides an oilfield well drilling linkage motor and a short-radius horizontal drilling method for casing damaged wells, and relates to the field of oilfield well drilling. The oil field well drilling linkage motor includes: a motor body and a transmission conversion assembly. The rotation of the axial flow impeller drives the pin puller clutch to work, so that the pin puller clutch is pulled out of the shaft, and the combination of the pin puller clutch and the shaft is released, so that the pin puller clutch is in an idling state. At this time, the drill bit connecting seat can move or stop with the reverse spray, thereby reducing the opposite torque force of the reverse spray or excessive forward speed. When it is too fast, the connecting transmission seat of the drill bit is driven by the axial flow impeller, and the connection will be separated. At this time, the transmission seat is in an idling state, thereby achieving the effect of protecting the drilling link motor of the oil field.

Description

Oilfield Well Drilling Link Motor and Short Radius Horizontal Drilling Method for Casing Damaged Wells

technical field

The present application relates to the technical field of oilfield well drilling, and in particular, relates to an oilfield well drilling linkage motor and a short-radius horizontal drilling method for casing damaged wells.

Background technique

Drilling tool motors are commonly used in drilling oilfield wells. Drilling tool motors, also known as screw motors, are volumetric downhole power drilling tools that use drilling fluid as power and convert fluid pressure energy into mechanical energy. When the mud pumped by the mud pump flows into the motor through the bypass valve, a certain pressure difference is formed at the inlet and outlet of the motor, which drives the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the drive shaft, thereby realizing drilling operations.

In the related art, the oil field well drilling link motor is used for drilling tools for drilling horizontal wells, and there is bound to be a blowback phenomenon. In oilfield wells, when the drilling link motor is drilling, there will be an opposite torque force. If the drilling work continues, the transmission part of the drilling link motor will easily break, which will affect the drilling work. Moreover, when the drilling link motor is used for drilling operations, if the forward speed is too fast, the force on the drilling link motor transmission part will also increase accordingly, and it will easily lead to the breakage of the drilling link motor transmission part. How to improve the above problems has become a technical problem that needs to be solved.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art. For this reason, the present application proposes an oil field well drilling link motor and a short-radius horizontal drilling method for casing damaged wells. When the oil field well drilling link motor encounters reverse jetting or advances too fast during drilling operations, the connection transmission seat of the drill bit is driven by the axial flow impeller, and the joint is disengaged. At this time, the transmission seat is in an idling state, thereby achieving the effect of protecting the oil field well drilling link motor.

In the first aspect, the embodiment of the present application provides an oil field well drilling linkage motor, including: a motor body and a transmission conversion assembly.

The transmission conversion assembly includes an axial flow connection seat, a rotating shaft, an axial flow impeller, a pin puller clutch, a positioning cylinder and a drill bit connection seat. The axial flow connection seat is fixedly connected to the output end of the motor body. The inside of the clutch part can be snapped into the outer wall of the upper end of the rotating shaft part and lock the rotating shaft part. The positioning cylinder part is threadedly inserted into the inside of the bottom end of the axial flow connecting seat part, the positioning cylinder part is pressed against the outer wall of the rotating shaft part, and the drill bit connecting seat is fixedly inserted into the lower end of the rotating shaft part.

According to some embodiments of the present application, the axial flow connection seat part includes an axial flow connection housing and a collecting cover, and the outer wall of the axial flow connecting housing is provided with an inlet hole and an outlet hole at equal intervals, the inlet hole is located below the axial flow impeller, the outlet hole is located above the axial flow impeller, the collecting cover is fixedly sleeved on the outer wall of the axial flow connection housing and the collecting cover is arranged obliquely downward, and the collecting cover covers the inlet hole.

According to some embodiments of the present application, the rotating shaft member includes a rotating shaft, a waterproof bearing and a compression sleeve. The inner ring of the waterproof bearing is fixedly sleeved on the rotating shaft, and the outer ring of the waterproof bearing is fixedly inserted into the axial flow connection shell. Fit into the engaging groove.

According to some embodiments of the present application, the rotating shaft includes a first shaft body, a second shaft body and a third shaft body, the second shaft body and the third shaft body are respectively fixedly connected to both ends of the first shaft body, the engaging groove is opened on the outer wall of the first shaft body, the second shaft body is configured as a prism shaft, the second shaft body is fixedly inserted into the upper end of the drill bit connecting seat, and the axial flow impeller is rotatably socketed on the third shaft body.

According to some embodiments of the present application, the drill bit connecting seat includes a transmission seat, a connecting seat, a first pin and a second pin, the upper end of the connecting seat is inserted into the lower end of the transmission seat, the first pin passes through the transmission seat and the connecting seat in turn, the upper end of the transmission seat is provided with a prism hole, the second shaft is inserted into the prism hole, and the second pin passes through the transmission seat and the second shaft in turn.

According to some embodiments of the present application, the inner wall of the axial flow connection housing is provided with a spline groove, the outer wall of the pin puller clutch is slidably inserted into the spline groove, and a support bearing is slidably inserted into the axial flow connection housing, and the support bearing includes a bearing body and a support ring.

According to some embodiments of the present application, the positioning cylinder includes a positioning cylinder and a limiting ring, the limiting ring is fixedly sleeved on the bottom end of the positioning cylinder, the positioning cylinder is threadedly inserted into the bottom end of the axial flow connection housing, and the positioning cylinder supports the lower side of the outer ring of the waterproof bearing.

According to some embodiments of the present application, the axial flow impeller includes an axial flow impeller and a force frame. The axial flow impeller is rotatably socketed on the upper end of the rotating shaft. External fluid can flow into the axial flow connection shell through the inlet hole to drive the axial flow impeller to rotate. The fluid inside the axial flow connection shell flows out through the outlet hole. The force force frame is fixedly connected to the outer wall of the lower end of the axial flow impeller at equal intervals.

According to some embodiments of the present application, the pin puller clutch includes a spline installation barrel, a fixing barrel, an engaging block, a toggle mechanism, and a compression spring. The spline installation barrel is fixedly inserted into the interior of the axial flow connection shell, and the fixing barrel is fixedly connected to the inner wall of the spline installation barrel. The engaging block is slidably inserted into the fixing barrel, and the engaging block can be snapped into the engaging groove. , the toggle mechanism can drive the engaging block to move into the fixed cylinder, one side of the toggle mechanism slides through the side wall of the fixed cylinder, and the force applying frame can toggle the toggle mechanism.

According to some embodiments of the present application, a slide bar is fixedly connected to the inner wall of the spline installation cylinder, and the engaging block is slidably connected to the slide bar.

According to some embodiments of the present application, the engaging block includes a block body, and one side of the end of the block is provided with a card interface, the card interface can be inserted into the engaging groove, and the side wall of the card interface can block the side wall of the engaging groove.

According to some embodiments of the present application, the toggle mechanism includes a double hinge plate, a single hinge plate, a push rod and a toggle frame, one end of the double hinge plate is hinged to the inner wall of the spline installation cylinder, one end of the single hinge plate is hinged in the engaging block, the opposite ends of the double hinge plate and the single hinge plate are hinged to each other, the push rod is fixedly connected to the side wall of the single hinge plate near the end of the double hinge plate, the toggle frame is slidably connected to the side wall of the fixed cylinder, the toggle frame The side inside the fixed cylinder can push the push rod, and the force-applying frame can move the toggle frame outside the fixed cylinder.

According to some embodiments of the present application, a disassembly adjustment mechanism is provided between the engaging block and the fixed cylinder, the disassembly adjustment mechanism includes a sliding cylinder, a sliding block, an adjusting screw and a limiting plate, one end of the sliding cylinder is fixedly connected to the engaging block, the inside of the sliding cylinder is set in a prism shape, the sliding block is set as a prismatic block, the sliding block is slidably connected to the inside of the sliding cylinder, one end of the adjusting screw rotates through the outer wall of the spline installation cylinder, the limit plate is fixedly sleeved on the adjustment screw, and the spline installation cylinder The inner wall can block the limiting plate, one end of the adjusting screw slides through the sliding cylinder, one end of the adjusting screw passes through the sliding cylinder and threads through the sliding block, and the compression spring is movably sleeved on the sliding cylinder.

In the second aspect, the embodiment of the present application also provides a short-radius horizontal drilling method for a casing damaged well, which is carried out by using the oil field well drilling link motor, including the following steps:

S001: Preparation of construction tools, the construction tools include: single-curved oil field well drilling link motor, double-curved oil field well drilling link motor, horizontal oil field well drilling link motor, flexible connection MWD, titanium alloy large inner diameter drill pipe and cement-free plug cementing tool;

S002: Run the oblique device in the middle of the casing above the casing damage point to open the window;

S003: Use the single-curved oil field well drilling link motor to build up to 5-6° well deviation, and then gradually lower the deviation to the straight well state, so that it is kept at a distance of 5 meters from the original wellbore;

S004: Use the double-curved oil field well drilling link motor to cooperate with the single-curved oil field well drilling link motor and the deflection drilling section to enter the target layer;

S005: Drilling a soft landing section and a horizontal well section in the target layer by using the horizontal oilfield well drilling link motor;

S006: Run screens and cement-free graded cementing tools, casings and releasers, and cement to seal off the passing water layer above the top of the target layer or other layers and well sections that need to be cemented;

S007: Exit the feeding tool, and circulate the cement slurry above the releaser;

S008: lame pressure Hou Ning;

S009: Recover the cementing rubber plug.

The beneficial effects of the application are: when in use, the output end of the motor main body drives the pin puller clutch, the pin puller clutch drives the rotating shaft to rotate, the rotating shaft drives the drill bit connecting seat, and the drill bit connecting seat drives the drill bit to work. The combination of the coupling part and the rotating shaft part makes the pull pin clutch part in the idling state. At this time, the drill bit connecting seat can move or stop moving with the reverse jet, thereby reducing the opposite torque force of the counter jet or the forward speed is too fast. It achieves the effect of protecting the oil field well drilling link motor.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is a three-dimensional structural schematic diagram of an oil field well drilling linkage motor according to the present application;

Fig. 2 is a three-dimensional structural schematic diagram of a transmission conversion assembly according to the present application;

Fig. 3 is a schematic diagram of the three-dimensional structure of the axial flow connection seat according to the present application;

Fig. 4 is a three-dimensional structural schematic diagram of a shaft member according to the present application;

Fig. 5 is a schematic diagram of a three-dimensional structure of a rotating shaft according to the present application;

Fig. 6 is a schematic diagram of the three-dimensional structure of the drill bit connector according to the present application;

Fig. 7 is a schematic perspective view of the three-dimensional structure of the supporting bearing pad according to the present application;

Fig. 8 is a schematic perspective view of the three-dimensional structure of an axial flow impeller according to the present application;

Fig. 9 is a schematic diagram of a three-dimensional structure of a pin puller clutch according to the present application;

Fig. 10 is a schematic perspective view of the three-dimensional structure of the joint of the engaging block according to the present application;

Fig. 11 is a schematic diagram of a three-dimensional structure of a toggle mechanism according to the present application;

Fig. 12 is a schematic perspective view of the disassembly adjustment mechanism according to the present application.

Icons: 100-motor main body; 200-transmission conversion assembly; 210-axial flow connection seat; 211-axial flow connection shell; 212-outflow hole; 213-inflow hole; Compression sleeve; 224-engagement groove; 230-axial flow impeller; 231-axial flow impeller; 232-force frame; Push rod; 2444-toggle frame; 245-compression spring; 246-disassembly adjustment mechanism; 2461-sliding cylinder; 2462-sliding block; 2463-adjusting screw; 2464-limiting plate; 64-prismatic hole; 265-second pin; 270-support bearing; 271-bearing body; 272-support ring.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to make the purposes, 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 in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

The following describes the oil field well drilling link motor and casing damaged well short-radius horizontal drilling method according to the embodiments of the present application with reference to the accompanying drawings.

Referring to Fig. 1 to Fig. 12, the embodiment of the present application provides an oil field well drilling linkage motor, including: a motor body 100 and a transmission conversion assembly 200. The mud pumped by the motor body 100 through the mud pump flows through the bypass valve and enters the motor. A certain pressure difference is formed at the inlet and outlet of the motor, which drives the rotor to rotate around the axis of the stator, and transmits the speed and torque to the drill bit through the cardan shaft and the transmission shaft, thereby realizing drilling operations. The motor body is also called a screw drilling tool.

Referring to Fig. 2, the transmission conversion assembly 200 includes an axial flow connection seat part 210, a rotating shaft part 220, an axial flow impeller part 230, a pin puller clutch part 240, a positioning cylinder part 250 and a drill bit connection seat 260. The inside of the axial flow connecting seat 210 drives the axial flow impeller 230 to rotate. The pull pin clutch 240 is installed inside the axial flow connecting seat 210. The inside of the pulling pin clutch 240 can be snapped into the outer wall of the upper end of the rotating shaft 220 and lock the rotating shaft 220. The positioning cylinder 250 is screwed into the inside of the bottom end of the axial flow connecting seat 210. The positioning cylinder 250 is pressed against the outer wall of the rotating shaft 220, and the drill bit connecting seat 260 It is fixedly inserted into the lower end of the rotating shaft member 220 . When in use, the output end of the motor main body 100 drives the pin puller clutch 240, the pin puller clutch 240 drives the rotating shaft 220 to rotate, the rotating shaft 220 drives the drill bit connecting seat 260, and the drill bit connecting seat 260 drives the drill bit to work. The pin clutch 240 works, so that the pin pull clutch 240 pulls out the rotating shaft part 220, and the combination of the pin pull clutch 240 and the rotating shaft 220 is released, so that the pull pin clutch 240 is in an idling state. At this time, the drill bit connecting seat 260 can move or stop moving with the reverse injection, thereby reducing the opposite torque force of the reverse injection or the forward speed is too fast. When the drilling operation encounters reverse injection or the forward speed is too fast, the connecting transmission seat of the drill bit is driven by the axial flow impeller, and the joint is disengaged. At this time, the transmission seat is in an idling state, thereby achieving the effect of protecting the drilling link motor of the oil field.

Please refer to FIG. 3 , the axial flow connection seat part 210 includes an axial flow connection shell 211 and a collecting cover 214, and the outer wall of the axial flow connecting shell 211 is provided with an inlet hole 213 and an outlet hole 212 at equal intervals. The flow cover 214 covers the inlet flow hole 213 . In the case of reverse spraying or fluid pouring due to excessive forward speed, the fluid collects through the collecting cover 214 and enters the axial flow connection shell 211 through the inlet hole 213, and the fluid flowing into the axial flow connection shell 211 drives the axial flow impeller 230 to rotate, and the flowing fluid flows out through the outlet hole 212, and the axial flow impeller 230 drives the pull pin clutch 240 to perform operations.

Please refer to Fig. 2-Fig. 4, the rotating shaft part 220 includes a rotating shaft 221, a waterproof bearing 222 and a compression sleeve 223. The inner ring of the waterproof bearing 222 is fixedly sleeved on the rotating shaft 221, and the outer ring of the waterproof bearing 222 is fixedly inserted into the axial flow connection shell 211. The compression sleeve 223 is threadedly connected to the rotating shaft 221. The compression sleeve 223 is pressed on the upper side of the inner ring of the waterproof bearing 222, and the positioning cylinder 250 is pressed on the waterproof bearing 2 22 The lower side of the outer ring and the outer wall of the upper end of the rotating shaft 221 are equally spaced with engagement grooves 224 , and the pin puller clutch 240 is engaged with the engagement grooves 224 . After the pin pullout clutch 240 is pulled out of the engagement groove 224, the rotating shaft 221 is idling, and the rotating shaft 221 rotates through the waterproof bearing 222, and the positioning cylinder 250 supports the waterproof bearing 222, and the waterproof bearing 222 supports the rotating shaft 221 through the compression sleeve 223, and then supports the drill bit connecting seat 260. The positioning cylinder 250 includes a positioning cylinder 251 and a limiting ring 252. The limiting ring 252 is fixedly sleeved on the bottom of the positioning cylinder 251. The positioning cylinder 251 is threadedly inserted into the bottom of the axial flow connection shell 211. The positioning cylinder 251 supports the lower side of the outer ring of the waterproof bearing 222. When the pin puller clutch 240 is removed, the positioning cylinder 251 is rotated, and the positioning cylinder 251 withdraws from the axial flow connection housing 211 through the principle of thread transmission, and the support of the positioning cylinder 251 on the waterproof bearing 222 is released, so that the pin puller clutch 240, the rotating shaft part 220 and the axial flow impeller part 230 are synchronously withdrawn from the axial flow connection shell 211, and then the pin puller clutch 240 is removed and replaced.

Please refer to FIG. 5 , the rotating shaft 221 includes a first shaft body 2211 , a second shaft body 2212 and a third shaft body 2213 . The second shaft body 2212 and the third shaft body 2213 are respectively fixedly connected to both ends of the first shaft body 2211 . The engaging groove 224 is opened on the outer wall of the first shaft body 2211 . 0 is rotatably socketed on the third shaft body 2213. After the pin-pull clutch 240 is engaged in the engaging groove 224 , the pin-pull clutch 240 rotates with the axial flow connection housing 211 , the pin-pull clutch 240 drives the first shaft 2211 through the engaging groove 224 , the second shaft 2212 rotates with the first shaft 2211 , and the drill bit connecting seat 260 rotates with the second shaft 2212 .

Please refer to FIG. 6 , the drill bit connecting seat 260 includes a transmission seat 261 , a connection seat 262 , a first pin 263 and a second pin 265 . 61 and the second shaft body 2212. When dismounting the connecting seat 262 and the transmission seat 261, extract the first latch 263, remove the connection between the connection seat 262 and the transmission seat 261, extract the connection seat 262 from the transmission seat 261, extract the second latch 265, release the connection between the transmission seat 261 and the second shaft body 2212, and remove the transmission seat 261 from the second shaft body 2212.

2-7, the inner wall of the axial flow connection housing 211 is provided with a spline groove 215, and the outer wall of the pin puller clutch 240 is slidably inserted into the spline groove 215. The support bush 270 is slidably inserted into the axial flow connection casing 211. The support bush 270 includes a bearing bush body 271 and a support ring 272. The support ring 272 is fixedly connected to the bottom of the bearing bush body 271, and the top of the bearing bush body 271 supports the lower side of the pull pin clutch 240. The outer ring of the waterproof bearing 222 supports the lower side of the support ring 272 . Through the support of the bearing bush body 271 to the pin puller clutch 240, the relative position of the pin puller clutch 240 and the engagement groove 224 is determined, which facilitates the engagement of the pin puller clutch 240 and the engagement groove 224.

Please refer to FIG. 8 , the axial flow impeller 230 includes an axial flow impeller 231 and a force frame 232. The axial flow impeller 231 is rotatably connected to the upper end of the shaft 221. External fluid can flow into the axial flow connection shell 211 through the inlet hole 213 to drive the axial flow impeller 231 to rotate. The fluid inside the axial flow connection shell 211 flows out through the outlet hole 212. The force frame 232 can toggle the pin-pull clutch 240 to carry out the clutch operation. The fluid flowing into the axial flow connection housing 211 drives the axial flow impeller 231 to rotate, the flowing fluid flows out through the outlet hole 212, the axial flow impeller 231 drives the force applying frame 232, and the force applying frame 232 moves the pin puller clutch 240 to carry out the clutch operation.

Please refer to Figure 9. In the related art, when the oilfield well drilling linkage motor controls the pin puller clutch, the external force is provided by the rotation of the axial flow impeller. However, when the oilfield well drilling linkage motor is in use, the environment is complex. If the internal environment of the pin puller clutch has a large gap with the outside, it is easy to cause external foreign matter to enter its interior. How to maintain a relatively stable internal environment when setting the pin puller clutch has become a technical problem that needs to be solved.

In order to solve the above technical problem, the technical solution further adopted in the present invention is that the pin puller clutch 240 includes a spline installation cylinder 241, a fixed cylinder 242, an engaging block 243, a toggle mechanism 244 and a compression spring 245. The spline installation cylinder 241 is fixedly inserted into the axial flow connection shell 211, the fixed cylinder 242 is fixedly connected to the inner wall of the spline installation cylinder 241, and the engaging block 243 is slidably inserted into the fixed cylinder 242, and the engaging block 243 can be snapped into The engagement groove 224 and the compression spring 245 are arranged in the fixed cylinder 242 , and one end of the compression spring 245 is pressed against the engaging block 243 . A slide bar 247 is fixedly connected to the inner wall of the spline installation barrel 241 , and the engaging block 243 is slidably connected to the slide bar 247 .

Please refer to FIG. 10 , the engaging block 243 includes a block body 2431 , one side of the end of the block body 2431 is provided with a card interface 2432 , the card interface 2432 can be inserted into the engaging groove 224 , and the side wall of the card interface 2432 can block the side wall of the engaging groove 224 . The card interface 2432 is inserted into the engaging groove 224, and the rest of the blocks 2431 are in the engaging groove 224, so that when the blocks 2431 move, they are automatically engaged by the elastic force of the compression spring 245.

Referring to Fig. 11 , the toggle mechanism 244 includes a double hinged plate 2441, a single hinged plate 2442, a push rod 2443 and a toggle frame 2444. One end of the double hinged plate 2441 is hinged to the inner wall of the spline installation cylinder 241, one end of the single hinged plate 2442 is hinged in the engaging block 243, the opposite ends of the double hinged plate 2441 and the single hinged plate 2442 are hinged to each other, and the push rod 2443 is fixedly connected. On the side wall of the single hinge plate 2442 close to the side wall of the double hinge plate 2441, the toggle frame 2444 is slidingly connected to the side wall of the fixed cylinder 242. When the axial flow impeller 231 drives the force applying frame 232, the force applying frame 232 gradually presses the toggle frame 2444, the toggle frame 2444 slides along the side wall of the fixed cylinder 242, the toggle frame 2444 pushes the push rod 2443, the push rod 2443 pushes the single hinge plate 2442 to turn over, the double hinge plate 2441 turns over accordingly, the single hinge plate 2442 pulls the engaging block 243, and the engaging block 243 leaves the engaging groove 2 24. Release the engagement between the engaging block 243 and the engaging groove 224. At this time, the rotating shaft 221 can run idling. When encountering reverse spraying or when the liquid is poured to form a fluid due to too fast forward speed, the drill bit connecting seat 260 can also be in clutch idling, reducing the drill bit connecting seat 260. When the opposite torque is applied to the drill bit connecting seat 260 or when the force is large due to the excessively fast advancing speed, the axial flow connection shell 211 and the spline mounting cylinder 241 are subjected to a large force, thereby reducing the force on the drill link motor transmission. The increase of force will cause the motor transmission part to break, effectively protecting the oil field well drilling link motor. The interior of the fixed cylinder 242 is composed of sliding parts, and the gap between the sliding parts is small. The internal space of the fixed cylinder 242 is relatively stable, reducing the entry of external foreign objects into the fixed cylinder 242, resulting in difficult operation.

Please refer to Figure 12. In the related art, the pin-pull clutch of the oil field well drilling link motor is driven by the engagement of the engagement block and the engagement groove. However, before the pin pull clutch and the rotating shaft are disassembled and disengaged, each engagement block needs to be pulled out from the engagement groove. In this process, external force needs to be continuously applied to control the engagement blocks. If the continuous external force is controlled by human hands, manpower is wasted. Under the situation of the case, make the engaging block be in disengagement state for a long time and become the technical problem that needs to be solved.

For this reason, the inventor has solved this technical problem through long-term practical research. Specifically, a disassembly adjustment mechanism 246 is provided between the engaging block 243 and the fixed cylinder 242. The disassembly adjustment mechanism 246 includes a sliding cylinder 2461, a sliding block 2462, an adjustment screw 2463 and a limit plate 2464. One end of the sliding cylinder 2461 is fixedly connected to the engaging block 243. The inside of the sliding cylinder 2461 is set in a prismatic shape, and the sliding block 2462 is set as a prismatic block. The sliding block 2462 is slidably connected to the inside of the sliding cylinder 2461 One end of the adjustment screw 2463 rotates through the outer wall of the spline installation cylinder 241, the limit plate 2464 is fixedly sleeved on the adjustment screw 2463, the inner wall of the spline installation cylinder 241 can block the limit plate 2464, one end of the adjustment screw 2463 slides through the slide cylinder 2461, the one end of the adjustment screw 2463 passes through the slide cylinder 2461 and threads through the slide block 2462, and the compression spring 245 is movably sleeved on the slide cylinder 2461 on. When the pull pin clutch 240 is removed, the positioning cylinder 251 is rotated, and the positioning cylinder 251 withdraws from the axial flow connection housing 211 through the principle of thread transmission, and the support of the positioning cylinder 251 to the waterproof bearing 222 is released, so that the pull pin clutch 240, the rotating shaft part 220 and the axial flow impeller part 230 are synchronously withdrawn from the axial flow connection housing 211. After the pull pin clutch part 240, the rotating shaft part 220 and the axial flow impeller part 230 are removed, the axial flow blade Wheel 231, and then rotate the adjusting screw 2463, the adjusting screw 2463 is screwed into the sliding block 2462 through the thread transmission principle, the adjusting screw 2463 is gradually received in the sliding cylinder 2461, and the corresponding sliding block 2462 drives the sliding cylinder 2461, and the sliding cylinder 2461 drives the engaging block 243 to retract the fixed cylinder 242, and the engaging block 243 leaves the engaging groove 224. During disassembly, only manual adjustment of the disassembly adjustment mechanism 246 is required in the early stage, so that the engaging block 243 is always in the disengaged state, and no manual support is required. At this time, the personnel can pull out the hand to pull out the pin clutch part 240, thereby improving the control of the position of the engaging block. Without using external force support for a long time, the problem of keeping the engaging block in the disengaged state for a long time is convenient to save manpower.

The embodiment of the present application also provides a short-radius horizontal drilling method for a casing damaged well, which is carried out by using an oil field well drilling link motor, including the following steps:

S001: Preparation of construction tools, construction tools include: single-curved oilfield well drilling linkage motor, double-curved oilfield well drilling linkage motor, horizontal oilfield well drilling linkage motor, flexible joint MWD, titanium alloy large inner diameter drill pipe and cement-free plug cementing tools;

S002: Run the oblique device in the middle of the casing above the casing damage point to open the window;

S003: Use a single-curved oil field well drilling link motor to build up to 5-6° well deviation, and then gradually lower the deviation to a straight well state, keeping the distance from the original wellbore at 5 meters;

S004: Use the double-curved oilfield well drilling link motor to cooperate with the single-curved oilfield well drilling link motor and the deflection drilling to enter the target layer;

S005: Use the horizontal oilfield well drilling link motor to drill the soft landing section and the horizontal well section in the target layer;

S006: Run screens and cement-free graded cementing tools, casings and releasers, and cement to seal off the passing water layer above the top of the target layer or other layers and well sections that need to be cemented;

S007: Exit the feeding tool, and circulate the cement slurry above the releaser;

S008: lame pressure Hou Ning;

S009: Recover the cementing rubber plug.

The short-radius horizontal drilling method for casing damaged wells is suitable for the treatment and restoration of casing damaged wells in oil and gas fields. For wells that have already suffered casing damage and cannot be restored through conventional overhaul operations, the short-radius horizontal drilling method for casing damaged wells can be implemented to allow the abandoned casing damaged wells to continue to resume production. Using the well site of the casing damaged well and the upper wellbore without casing damage, the drilling tool and drilling method of the short-radius horizontal well can be used to quickly transform the casing damaged well, avoid the casing damage point, and sidetrack a new wellbore, avoiding the 5 meters behind the casing damage well. Adjust it to a vertical well, quickly pass through the casing damaged well section to reach 20-30 meters above the top of the target layer. During this time, you may encounter complex formations, and then drill the casing damaged well target layer with an ultra-short radius or short radius well type, and realize the reconstruction of the casing damaged well by drilling horizontal wells in the target layer, so as to achieve the purpose of restoring production or increasing production.

Specifically, the working principle of the oil field well drilling link motor and casing damaged well short-radius horizontal drilling method: when in use, the output end of the motor body 100 drives the axial flow connection housing 211 to rotate, the pull pin clutch 240 rotates with the axial flow connection shell 211, the pull pin clutch 240 drives the first shaft body 2211 through the engaging groove 224, the second shaft body 2212 rotates with the first shaft body 2211, and the drill bit connection seat 260 rotates with the second shaft body 2212, Drive the drill bit to work. When encountering the situation of reverse spray or liquid pouring due to too fast forward speed, the fluid is collected through the collecting cover 214 and enters the axial flow connecting shell 211 through the inlet hole 213. The fluid flowing into the axial flow connecting shell 211 drives the axial flow impeller 231 to rotate. The flowing fluid flows out through the outlet hole 212. The axial flow impeller 231 drives the force applying frame 232. , so that the pin puller clutch 240 is pulled out of the engaging groove 224, the combination of the pin puller clutch 240 and the first shaft body 2211 is released, and the pin puller clutch 240 is in an idling state. At this time, the drill bit connecting seat 260 can move or stop moving with the reverse injection, thereby reducing the reverse torque force of the reverse injection or the forward speed is too fast. Or when the forward speed is too fast, the connecting drive seat of the drill bit is driven by the axial flow impeller, and the joint is disengaged. At this time, the drive seat is in an idling state, thereby achieving the effect of protecting the oil field well drilling link motor.

When the axial flow impeller 231 drives the force applying frame 232, the force applying frame 232 gradually presses the toggle frame 2444, the toggle frame 2444 slides along the side wall of the fixed cylinder 242, the toggle frame 2444 pushes the push rod 2443, the push rod 2443 pushes the single hinge plate 2442 to turn over, the double hinge plate 2441 turns over accordingly, the single hinge plate 2442 pulls the engaging block 243, and the engaging block 243 leaves the engaging groove 2 24. Release the engagement between the engaging block 243 and the engaging groove 224. At this time, the rotating shaft 221 can run idling. When encountering reverse spraying or when the liquid is poured to form a fluid due to too fast forward speed, the drill bit connecting seat 260 can also be in clutch idling, reducing the drill bit connecting seat 260. When the opposite torque is applied to the drill bit connecting seat 260 or when the force is large due to the excessively fast advancing speed, the axial flow connection shell 211 and the spline mounting cylinder 241 are subjected to a large force, thereby reducing the force on the drill link motor transmission. The increase of force will cause the motor transmission part to break, effectively protecting the oil field well drilling link motor. The interior of the fixed cylinder 242 is composed of sliding parts, and the gap between the sliding parts is small. The internal space of the fixed cylinder 242 is relatively stable, reducing the entry of external foreign objects into the fixed cylinder 242, resulting in difficult operation.

When the pull pin clutch 240 is removed, the positioning cylinder 251 is rotated, and the positioning cylinder 251 withdraws from the axial flow connection housing 211 through the principle of thread transmission, and the support of the positioning cylinder 251 to the waterproof bearing 222 is released, so that the pull pin clutch 240, the rotating shaft part 220 and the axial flow impeller part 230 are synchronously withdrawn from the axial flow connection housing 211. After the pull pin clutch part 240, the rotating shaft part 220 and the axial flow impeller part 230 are removed, the axial flow blade Wheel 231, and then rotate the adjusting screw 2463, the adjusting screw 2463 is screwed into the sliding block 2462 through the thread transmission principle, the adjusting screw 2463 is gradually received in the sliding cylinder 2461, and the corresponding sliding block 2462 drives the sliding cylinder 2461, and the sliding cylinder 2461 drives the engaging block 243 to retract the fixed cylinder 242, and the engaging block 243 leaves the engaging groove 224. During disassembly, only manual adjustment of the disassembly adjustment mechanism 246 is required in the early stage, so that the engaging block 243 is always in the disengaged state, and no manual support is required. At this time, the personnel can pull out the hand to pull out the pin clutch part 240, thereby improving the control of the position of the engaging block. Without using external force support for a long time, the problem of keeping the engaging block in the disengaged state for a long time is convenient to save manpower.

The above are only examples of the present application, and are not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application. It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

Claims (6)

1. Oilfield well drilling link motor, including the motor main part, its characterized in that still includes:

the transmission conversion assembly comprises an axial flow connecting seat part, a rotating shaft part, an axial flow impeller part, a pin pulling clutch part, a positioning cylinder part and a drill bit connecting seat, wherein the axial flow connecting seat part is fixedly connected with the output end of the motor main body, the rotating shaft part is rotationally connected in the axial flow connecting seat part, the axial flow impeller part is rotationally connected to the top end of the rotating shaft part, external fluid can flow into the axial flow connecting seat part to drive the axial flow impeller part to rotate, the pin pulling clutch part is arranged in the axial flow connecting seat part, the pin pulling clutch part can be clamped in the outer wall of the upper end of the rotating shaft part and locks the rotating shaft part, the positioning cylinder part is in threaded connection with the inner part of the bottom end of the axial flow connecting seat part, the positioning cylinder part is tightly pressed on the outer wall of the rotating shaft part, the drill bit connecting seat is fixedly connected with the lower end of the rotating shaft part, the axial flow connecting seat part comprises an axial flow connecting shell and a collecting cover, wherein the outer wall of the axial flow connecting shell is penetrated and provided with an inflow hole and an outflow hole at equal intervals, the inflow hole is positioned below the axial flow impeller part, the outflow hole is positioned above the axial flow impeller part, the collecting cover is fixedly sleeved on the outer wall of the axial flow connecting shell and is obliquely downwards arranged, the collecting cover covers the inflow hole, the rotating shaft part comprises a rotating shaft, a waterproof bearing and a compression sleeve, the inner ring of the waterproof bearing is fixedly sleeved on the rotating shaft, the outer ring of the waterproof bearing is fixedly inserted in the axial flow connecting shell, the compression sleeve is sleeved on the rotating shaft through threads, the compression sleeve is compressed on the upper side of the inner ring of the waterproof bearing, the positioning sleeve is compressed on the lower side of the outer ring of the waterproof bearing, the outer wall of the upper end of the rotating shaft is provided with clamping grooves at equal intervals, the pin pulling clutch piece is clamped in the clamping groove, the axial flow impeller piece comprises an axial flow impeller and a force application frame, the axial flow impeller is rotationally sleeved at the upper end of the rotating shaft, external fluid can flow into the axial flow connecting shell through the inflow hole, the axial flow impeller is driven to rotate, the fluid in the axial flow connecting shell flows out through the outflow hole, the force application frame is fixedly connected to the outer wall of the lower end of the axial flow impeller at equal intervals, the force application frame can stir the pin pulling clutch piece to conduct clutch operation, the pin pulling clutch piece comprises a spline mounting cylinder, a fixing cylinder, a clamping block, a stirring mechanism and a compression spring, the spline mounting cylinder is fixedly inserted into the axial flow connecting shell, the fixing cylinder is fixedly connected to the inner wall of the spline mounting cylinder, the clamping block is slidably inserted into the fixing cylinder, the clamping block can be clamped into the clamping groove, the compression spring is arranged in the fixing cylinder, one end of the compression spring is tightly pressed on the clamping block, the stirring mechanism is arranged in the fixing cylinder, the stirring mechanism can drive the stirring mechanism to one side of the sliding mechanism, and the stirring mechanism can penetrate through the side wall of the fixing cylinder.

2. The oilfield well drilling link motor according to claim 1, wherein the rotating shaft comprises a first shaft body, a second shaft body and a third shaft body, the second shaft body and the third shaft body are respectively and fixedly connected to two ends of the first shaft body, the clamping groove is formed in the outer wall of the first shaft body, the second shaft body is a prismatic shaft, the second shaft body is fixedly inserted into the upper end of the drill bit connecting seat, and the axial flow impeller member is rotationally sleeved on the third shaft body.

3. The oilfield well drilling link motor according to claim 2, wherein the drill bit connecting seat comprises a transmission seat, a connecting seat, a first bolt and a second bolt, the upper end of the connecting seat is inserted into the lower end of the transmission seat, the first bolt sequentially penetrates through the transmission seat and the connecting seat, a prismatic hole is formed in the upper end of the transmission seat, the second shaft body is inserted into the prismatic hole, and the second bolt sequentially penetrates through the transmission seat and the second shaft body.

4. The oilfield well drilling link motor of claim 1, wherein the axial flow connection housing has a spline groove formed therein, the outer wall of the pin-pulling clutch is slidably inserted into the spline groove, the axial flow connection housing has a support bushing slidably inserted therein, the support bushing comprises a bushing body and a support ring, the support ring is fixedly connected to the bottom end of the bushing body, the top end of the bushing body supports the periphery of the underside of the pin-pulling clutch, and the waterproof bearing outer ring supports the underside of the support ring.

5. The oilfield well drilling link motor of claim 1, wherein the positioning barrel comprises a positioning barrel and a limiting ring, the limiting ring is fixedly sleeved at the bottom end of the positioning barrel, the positioning barrel is in threaded insertion connection with the inside of the bottom end of the axial flow connection shell, and the positioning barrel supports the lower side of the waterproof bearing outer ring.

6. A method of casing lost circulation horizontal drilling using an oilfield well drilling link motor of any one of claims 1-5, comprising the steps of:

s001: preparing a construction tool, the construction tool comprising: the single-bend oilfield well drilling link motor, the double-bend oilfield well drilling link motor, the horizontal oilfield well drilling link motor, the flexible connection MWD, the titanium alloy large-inner diameter drill rod and the cement plug-free cementing tool;

s002: a whipstock is put in the middle of the sleeve above the sleeve damage point for windowing;

s003: using the single-bend oilfield well drilling link motor to incline to 5-6 degrees of well inclination, and gradually declining to a vertical well state to keep a distance of 5 meters from the original borehole;

s004: using the double-bend oilfield well drilling linking motor to match with the single-bend oilfield well drilling linking motor, and drilling an inclined well section into a target layer by deflecting;

s005: drilling a soft landing well section and a horizontal well section in a target layer by using a horizontal oil field well drilling link motor;

s006: putting a screen pipe, a cement-free plug graded well cementing tool, a sleeve and a releaser into a water layer passing through a road above the top of a well cementing and packing target layer or other layers and well sections needing to be fixed and sealed;

s007: the running tool is withdrawn, and cement paste above the releaser is circulated;

s008: are subjected to weather curing;

s009: and (5) recovering the well cementation rubber plug.