CN114635665B - An oil drilling plugging device - Google Patents

Abstract

The application relates to the technical field of petroleum drilling, in particular to a petroleum drilling plugging device which comprises a casing, a limiting mechanism and a plugging mechanism; the limiting mechanism comprises a driving assembly and a plurality of inserting rods for being inserted into the wall of the oil well, the inserting rods are uniformly distributed along the circumferential direction of the sleeve, a sliding groove for the inserting rods to slide is formed in the sleeve, and the sliding groove is formed along the radial direction of the sleeve; the driving assembly is used for driving the insertion rod to slide along the sliding groove; the plugging mechanism is used for plugging an oil well; according to the designed petroleum drilling plugging device, when the surface of the well wall of the oil well is flat, the plugging rods are uniformly inserted into the well wall of the oil well, so that the sleeve and the well wall of the oil well are fixed; when the surface of the well wall of the oil well is uneven, the inserting rods can be inserted into the uneven positions of the well wall of the oil well, so that the plurality of inserting rods tend to be stressed uniformly, the connection performance of the inserting rods and the well wall is improved, and the fixing effect of the sleeve is further improved.

Description

An oil drilling plugging device

technical field

The present application relates to the technical field of oil drilling, and in particular, to an oil drilling plugging device.

Background technique

In the process of oilfield development, lost circulation is one of the common phenomena. Loss of circulation refers to a complex downhole situation in which drilling fluid, cement slurry, completion fluid and other fluids directly enter the formation under the action of pressure difference during downhole operations such as drilling, cementing, testing or workover; The leakage phenomenon is often stuck in the leakage plugging position through the leakage plugging device, so that the liquid flow is separated from the upper and lower production layers, and at the same time, it cannot enter the oil pipe, so as to realize the plugging of lost circulation and achieve the purpose of oil increase.

The patent document with the application number of 201720976484.2 discloses a cage type drilling plugging device, comprising a small coiled tubing, an expansion sleeve, a cage sleeve and a sealing sleeve, the small coiled tubing is connected with the expansion sleeve, and the expansion sleeve is in a closed shape; the cage The sleeve includes a plurality of cage posts of equal length, and a cylindrical locking ring is formed by connecting the cage posts. There are at least two locking rings. A ratchet wheel and a pawl are arranged between them, and a clip is sleeved on the outside of the matching connection part. The ratchet wheel and the pawl can only expand the locking ring; the sealing sleeve is sleeved on the outside of the cage, and the expansion sleeve is located in the cage. The maximum diameter is greater than the diameter of the cage.

In view of the above-mentioned related art, the applicant believes that when the cage and the sealing sleeve are in contact with the wellbore wall, the rock formation will be damaged during the drilling process, resulting in uneven surface of the rock formation, so that there is a gap between the local position of the cage and the sealing sleeve and the wellbore wall. There is a gap, which affects the fixing effect of the cage and the sealing sleeve.

SUMMARY OF THE INVENTION

In order to improve the fixing effect between the casing and the well wall, the present application provides a leakage plugging device for oil drilling.

A kind of oil drilling plugging device provided by the application adopts the following technical scheme:

An oil drilling plugging device, comprising a casing, a limiting mechanism and a blocking mechanism;

The limiting mechanism includes a drive assembly and a plurality of plug-in rods for inserting into the wall of the oil well, and the plurality of plug-in rods are evenly distributed along the circumferential direction of the casing, and the casing is provided with holes for all the plugs. a sliding groove for sliding the plug-in rod, the sliding groove is arranged along the radial direction of the sleeve, and the number of the sliding groove and the plug-in rod is the same;

the driving component is used for driving the plugging rod to slide along the sliding groove;

The plugging mechanism is used for oil well plugging.

By adopting the above technical solution, when the downhole is plugged, the drive assembly is adjusted, and the drive assembly drives the plug-in rod to slide along the sliding groove, so that the plug-in rod is inserted into the wall of the oil well, and then the plugging assembly is adjusted so that the plugging assembly can affect the oil well. The position to be plugged is plugged; the designed oil drilling plugging device, when the surface of the oil well wall is flat, the plug rod is evenly inserted into the oil well wall to achieve the fixing of the casing and the oil well wall; when the oil well wall surface is not When flat, the plug-in rod can be inserted into the uneven position of the oil well wall, so that the multiple plug-in rods tend to be uniformly stressed, and the connection performance between the plug-in rod and the well wall is improved, thereby improving the fixing effect of the casing.

Optionally, the drive assembly includes a threaded rod, a sleeve, a push block and a guide, and the threaded rod, the sleeve, the push block and the sleeve are coaxially arranged;

The sleeve is sleeved on the threaded rod, and the sleeve is threadedly connected to the threaded rod;

The push block is sleeved on the sleeve, and the push block is fixedly connected with the sleeve, the push block is located in the inner cavity of the sleeve, and the push block includes a cylindrical section and a circular platform that are integrally arranged one end of the plug-in rod extending into the inner cavity of the sleeve abuts against the side wall of the circular truncated segment;

The guide is used to move the sleeve in the axial direction of the threaded rod.

By adopting the above technical solution, the threaded rod is rotated. Under the action of the guide, the threaded rod drives the sleeve to move along the axis of the threaded rod, and the sleeve drives the push block to slide along the inner cavity of the casing. During the sliding process of the push block, the First of all, the small end of the round table section is in contact with the plug-in rod, and the round table section pushes the plug-in rod to move to the side away from the casing cavity, and moves until the plug-in rod is inserted into the well wall of the oil well; the designed drive assembly is convenient for driving the plug-in rod along the The sliding groove slides, so that the plug-in rod is inserted into the wall of the oil well, and the position of the casing is fixed.

Optionally, the sleeve includes a mounting part, a clamping part and a rotating part arranged in order from high to low, and the mounting part, the clamping part and the rotating part are coaxially arranged;

The push block is located in the inner cavity of the clamping portion, and the cylindrical segment is slidably connected to the clamping portion;

One end of the clamping portion away from the mounting portion is rotatably connected to the rotating portion, one end of the threaded rod is fixedly connected to the rotating portion, and the other end extends into the inner cavity of the mounting portion through the clamping portion .

By adopting the above technical solution, the casing set in sections is driven by the threaded rod to rotate the rotating part, and then the uneven rock wall of the oil well is polished, so that the wall of the oil well tends to be flat, and it is convenient for the plugging mechanism to plug the oil well ; Its snap-on part is easy to install the plug-in rod and push block.

Optionally, the blocking mechanism includes an upper pressure plate, a lower pressure plate and a rubber plug;

The lower pressing plate is fixedly connected to one end of the clamping portion close to the mounting portion, the sleeve penetrates the lower pressing plate and protrudes into the inner cavity of the mounting portion, and the sleeve is slidably connected to the lower pressing plate ;

One end of the sleeve protruding into the inner cavity of the mounting portion is fixedly connected to the upper pressing plate, and a pressing groove for the sliding of the upper pressing plate is opened in the mounting portion, and the pressing groove is along the axial direction of the mounting portion. set up;

The rubber plug is sleeved on the sleeve, and the rubber plug is located between the upper pressing plate and the lower pressing plate.

By adopting the above technical solution, the threaded rod is rotated, under the action of the guide, the threaded rod drives the sleeve to move along the axis of the threaded rod, the sleeve drives the push block to move, and the push block pushes the plug-in rod to slide along the sliding groove, After sliding until the plug rod is inserted into the wall of the oil well, the sleeve continues to move, driving the upper pressure plate to move downward, and the upper pressure plate exerts force on the rubber block. Because the position of the lower pressure plate is fixed, the distance between the upper pressure plate and the lower pressure plate is reduced. It is small, so that the rubber blockage is squeezed and bulged, and the rubber blockage can be tightly pressed against the oil well wall, thereby realizing the oil well sealing; the designed blocking mechanism can adjust the distance between the upper pressure plate and the lower pressure plate. The lower pressure plate exerts force on the rubber blockage, so that the rubber blockage is squeezed and bulged, and the rubber blockage is tightly pressed against the oil well wall, thereby realizing the sealing of the oil well by the rubber blockage.

Optionally, a sealing rubber ring is sleeved on the peripheral wall of the upper pressing plate.

By adopting the above technical solution, the designed sealing rubber ring improves the sealing performance between the upper pressure plate and the installation part, and prevents the liquid in the oil well from entering the inner cavity of the installation part.

Optionally, the guide member includes at least one guide rod, one end of the guide rod is fixedly connected to the upper pressure plate, and a guide groove for the guide rod to slide is opened on the clamping portion, and the guide rod is used for sliding movement of the guide rod. The grooves are arranged along the axial direction of the engaging portion.

By adopting the above technical solution, when the threaded rod drives the sleeve to move downward, the sleeve drives the upper pressure plate to move downward, and the upper pressure plate drives the guide rod to slide along the guide groove; the designed guide is easy to guide the sleeve, so that The sleeve moves in the axial direction of the threaded rod.

Optionally, the clamping portion includes a connecting section, a linkage and a plurality of limiting sections for abutting against the wall of the oil well;

A plurality of the limiting segments are evenly distributed along the circumferential direction of the sleeve, and the sliding grooves are located on the limiting segments;

The connecting segment is provided with a limiting groove for the sliding of the limiting segment, and the limiting groove is arranged along the radial direction of the engaging portion;

The linkage member is connected with the insertion rod, and the linkage member drives the limiting segment to move to a side away from the inner cavity of the clamping portion.

By adopting the above technical solution, during the movement of the plug-in rod along the sliding groove, the plug-in rod exerts force on the linkage member, and the linkage member drives the limit section to slide along the limit groove, and slide to the limit section and the oil well wall abutting to achieve the position fixation of the limit section, and then the position of the sleeve is fixed; the segmented design of the clamping part, the connecting section is used to install the lower pressure plate and the rotating section, which is convenient for the rotating connection between the rotating section and the connecting section, and at the same time, The position of the lower pressure plate is fixed; the limit section is used to abut the wall of the oil well to improve the connection performance between the casing and the wall of the oil well.

Optionally, the linkage includes a guide slider;

The groove wall of the sliding groove is provided with a guiding sliding groove for the sliding of the guiding block, and the guiding sliding groove is arranged along the length direction of the sliding groove;

The guide block is fixedly connected with the side wall of the plug-in rod, and the guide block includes a first movement stage and a second movement stage;

In the first movement stage, the guide block slides along the guide chute to drive the plug-in rod to be inserted into the wall of the oil well;

In the second movement stage, the guide block is in contact with the groove wall of the guide groove, and the guide block drives the limiting segment to slide along the limiting groove, driving the limiting segment and the oil well The well wall is tight.

By adopting the above technical solution, the threaded rod is rotated, under the action of the guide rod and the guide groove, the threaded rod drives the sleeve to move along the axis of the threaded rod, the sleeve drives the push block to slide along the inner cavity of the casing, and the push block moves along the inner casing of the casing. During the sliding process of the cavity, the small end of the circular truncated segment first comes into contact with the plug-in rod, and the side wall of the circular truncated segment is in contact with the plug-in rod. The sliding groove slides, and the plug-in rod drives the guide block to slide along the guide groove, until the plug-in rod is inserted into the well wall, and when the guide block is in contact with the guide groove wall, the plug-in rod continues to slide along the guide block. When the groove moves, the guide block drives the limit section to move until the limit section is in close contact with the well wall of the oil well, so that the position of the casing is fixed; the designed linkage is convenient to apply force to the limit section through the guide block, making the The guide block drives the limit section to slide along the limit groove, so that the limit section is tightly abutted against the wall of the oil well, thereby realizing the fixed position of the casing.

Optionally, the linkage further includes a first return spring for driving the insertion rod to move toward the inner cavity of the sleeve; the first return spring is located in the guide chute, and the One end of the first return spring is connected with the guide block, and the other end is connected with the groove wall of the guide groove.

By adopting the above technical solution, the designed first return spring is convenient to drive the plug-in rod to move to the inner cavity side of the clamping part, realize the reset of the plug-in rod, and then realize the unblocking of the oil well; The block is in abutting state, which is convenient for the push block to drive the plug-in rod to slide along the sliding groove, so as to realize the plug-in connection between the plug-in rod and the wall of the oil well.

Optionally, a limit slider is arranged on the limit segment, a limit chute for the limit slider to slide is opened on the connecting segment, and the limit slot is connected to the limit slot. and the limit chute is arranged along the radial direction of the clamping portion, and a second block for driving the limit slider to move toward the inner cavity of the clamping portion is provided in the limit chute. Two return springs.

By adopting the above technical solution, the designed second return spring is convenient for driving the limit section to reset, so that the limit section returns to the initial position in a natural state, and the surfaces of the limit section and the connecting section tend to be flat, which is convenient for the leakage plugging device to move along the At the same time, the lifting and lowering of the oil well is convenient for the reuse of the leakage plugging device.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. The designed oil drilling plugging device, when the surface of the oil well wall is flat, the plug rod is evenly inserted into the oil well wall to realize the fixing of the casing and the oil well wall; when the oil well wall surface is uneven, the plug rod It can be inserted into the uneven position of the wall of the oil well, so that the multiple plug-in rods tend to be uniformly stressed, which improves the connection performance between the plug-in rod and the well wall, thereby improving the fixing effect of the casing;

2. The designed oil drilling plugging device, through the linkage, the guide block drives the limit section to slide along the limit groove, which is convenient for the limit section and the oil well wall to be tightly pressed. Sliding connection, firstly makes the plugging rod and the oil well wall fixed, and then makes the limit section abut against the oil well wall to realize the fixed position of the casing;

3. The designed oil drilling plugging device drives the rotating part to rotate through the threaded rod, and then grinds the uneven rock wall of the oil well, so that the wall of the oil well tends to be flat, which is convenient for the plugging mechanism to plug the oil well; The connection part is convenient for the installation of the plug-in rod and the push block.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of the oil drilling plugging device in Example 1 of the present application.

2 is a cross-sectional view of the oil drilling plugging device in Example 1 of the present application.

FIG. 3 is an enlarged schematic view of part A of FIG. 2 .

FIG. 4 is an enlarged schematic view of part B of FIG. 2 .

Description of reference numerals: 1, sleeve; 11, mounting part; 111, pressing groove; 12, clamping part; 121, connecting section; 122, limit section; 123, linkage; Guide slider; 1233, first return spring; 13, rotating part; 131, rotating segment; 132, extending segment; 2, limiting mechanism; 21, driving assembly; 211, motor; 212, threaded rod; 213, sleeve Cylinder; 214, guide piece; 2141, guide rod; 2142, guide groove; 2143, closing stop ring; 2144, flaring boss; 215, push block; 2151, cylindrical section; 2152, round table section; 22, plug-in rod ; 221, plug-in section; 222, slip section; 23, slip slot; 24, limit slot; 25, limit slider; 26, second return spring; 27, limit chute; 3, block mechanism; 31, upper platen; 32, rubber block; 33, lower platen; 34, waist groove; 35, sealing rubber ring.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-4.

The embodiments of the present application disclose a leakage plugging device for oil drilling.

Referring to Figure 1, an oil drilling plugging device includes a casing 1, a limiting mechanism 2 for fixing the position of the casing 1, and a blocking mechanism 3 for plugging oil wells; the casing 1 includes a sequence from high to low. The installation part 11 , the clamping part 12 and the rotating part 13 are provided. The installation part 11 , the clamping part 12 and the rotating part 13 are arranged coaxially; The rotating part 13 includes a rotating section 131 and a projecting section 132 that are integrally connected. The rotating section 131 and the projecting section 132 are coaxially arranged, and the rotating section 131 is rotatably connected to the clamping part 12 . The cross-sectional area of the end away from the rotating section 131 gradually decreases. In this embodiment, the extending section 132 is arranged in the shape of an inverted truncated cone, so that the clamping portion 12 can extend into the oil well.

2 and 3, the blocking mechanism 3 includes an upper pressure plate 31, a lower pressure plate 33 and a rubber plug 32; the casing 1, the upper pressure plate 31, the lower pressure plate 33 and the rubber plug 32 are coaxially arranged, and the lower pressure plate 33 and the clamping part are arranged coaxially. 12 is welded at one end close to the mounting portion 11, and the lower pressing plate 33 has the same diameter as the clamping portion 12; one end of the sleeve 213 extending into the mounting portion 11 is welded with the upper pressing plate 31, and the mounting portion 11 is provided with a pressure plate for the sliding of the upper pressing plate 31. A groove 111 is formed, and the pressure groove 111 is arranged along the axial direction of the mounting portion 11 to facilitate the movement of the upper pressing plate 31 along the axial direction of the mounting portion 11; a sealing rubber ring 35 is sleeved on the peripheral wall of the upper pressing plate 31, and the upper pressing plate 31 and the seal The rubber ring 35 is bonded; the rubber plug 32 is sleeved on the sleeve 213, and the rubber plug 32 is located between the upper pressure plate 31 and the lower pressure plate 33; through the downward movement of the upper pressure plate 31, the rubber plug 32 is squeezed to make the rubber plug 32 When bulging occurs, it is tightly pressed against the wall of the oil well to realize the plugging of the oil well.

Referring to FIGS. 2 and 4 , the limiting mechanism 2 includes a drive assembly 21 and a plurality of plug-in rods 22 for inserting into the wall of an oil well. In the present application, the number of plug-in rods 22 may be three, four, or It is five, as long as the insertion rods 22 can be inserted into the wall of the oil well, and the position of the casing 1 is fixed, the number of the insertion rods 22 in this embodiment is set to four, and the four insertion rods 22 are along the casing 1. The circumferential direction of the casing 1 is evenly distributed, and each plug-in rod 22 is arranged along the radial direction of the casing 1, so that the four plug-in rods 22 can be inserted into the well wall of the oil well, and the position of the casing 1 can be fixed; the plug-in rod 22 The sliding section 222 and the plugging section 221 are integrally connected, and the sliding section 222 and the plugging section 221 are arranged coaxially. Small; the clamping part 12 is provided with a sliding groove 23 for the sliding section 222 to slide, and the sliding groove 23 is arranged along the radial direction of the sleeve 1. In the embodiment, the plug-in section 221 is arranged in a conical shape, so that the plug-in rod 22 can be inserted into the side wall of the oil well along the sliding groove 23 .

2 and 4, the drive assembly 21 is used to drive the insertion rod 22 to slide along the sliding groove 23; the drive assembly 21 includes a threaded rod 212, a sleeve 213, a push block 215 and a guide 214, the threaded rod 212, the sleeve The sleeve 213, the push block 215 and the sleeve 1 are coaxially arranged; the sleeve 213 is sleeved on the threaded rod 212, and the sleeve 213 is threadedly connected with the threaded rod 212, and the sleeve 213 penetrates the lower pressing plate 33 and extends into the inner cavity of the mounting part 11 in the middle, and the sleeve 213 is slidingly connected with the lower pressing plate 33; the push block 215 is sleeved on the sleeve 213, and the push block 215 is fixedly connected with the sleeve 213, the push block 215 is located in the inner cavity of the clamping part 12, and the push block 215 includes a cylindrical section 2151 and a circular truncated section 2152 that are integrally connected. The cylindrical section 2151 is located above the circular truncated section 2152, and the cylindrical section 2151 and the circular truncated section 2152 are coaxially arranged. The cross-sectional area of the end close to the cylindrical segment 2151 to the end away from the cylindrical segment 2151 gradually decreases, the end of the sliding segment 222 away from the plug-in segment 221 extends into the inner cavity of the clamping part 12 , and the sliding segment 222 extends into the inner cavity of the clamping part 12 Abutting with the side wall of the round table section 2152; the sliding groove 23 is arranged along the radial direction of the clamping part 12, and the sliding groove 23 is communicated with the inner cavity of the clamping part 12; one end of the threaded rod 212 is away from the extending section from the rotating section 131 One end of 132 is fixedly connected, the other end extends into the inner cavity of the mounting portion 11 through the clamping portion 12, and the threaded rod 212 extends into the inner cavity of the mounting portion 11. One end of the motor 211 is installed, and the threaded rod 212 and the motor 211 are connected by a coupling. .

2 and 3, the guide member 214 is used to move the sleeve 213 in the axial direction of the threaded rod 212, so that the sleeve 213 moves in the axial direction of the threaded rod 212. The guide member 214 includes at least one guide rod 2141. In the application, the number of guide rods 2141 can be one, two, or three, as long as the guide of the sleeve 213 can be achieved, in this embodiment, two guide rods 2141 are provided, and the two guide rods 2141 are related to the thread The axes of the rods 212 are symmetrically distributed, the guide rods 2141 and the threaded rods 212 are axially parallel to each other, and one end of the guide rods 2141 is welded to the upper pressing plate 31 . A flared boss 2144 is welded on one end of the guide rod 2141 away from the upper pressure plate 31 , and a flaring boss 2144 is welded on the clipping section 12 along the axial direction of the clamping portion 12 . The retaining ring 2143 is arranged close to the notch of the guide groove 2142; in addition, in order to make the guide rod 2141 slide along the guide groove 2142, the guide rod 2141 is arranged through the rubber block 32, and the guide rod 2141 is slidably connected with the rubber block 32, in order to avoid the rubber block 32 32 exerts too much force on the guide rod 2141 during the bulging process. In this application, the rubber block 32 is provided with a waist-shaped groove 34, and the length direction of the waist-shaped groove 34 is the same as the radial direction of the rubber block 32. The guide rod The threaded rod 212 is driven by the motor 211 to rotate, and the threaded rod 212 drives the rotating part 13 to rotate. At the same time, the threaded rod 212 drives the sleeve 213 to move along the axial direction of the threaded rod 212, and the sleeve 213 drives The push block 215 moves so that the push block 215 slides along the sliding groove 23 .

Referring to FIGS. 2 and 4 , the clamping portion 12 includes a connecting section 121 , a linkage 123 and a plurality of limit sections 122 for abutting against the wall of the oil well; the number of the limit sections 122 in this application is the same as the plug rod 22 Therefore, the number of insertion rods 22 in the present application is four, the four limit segments 122 are evenly distributed along the circumferential direction of the casing 1, and each limit segment 122 is correspondingly provided with a sliding A shift slot 23 is installed, and a plug-in rod 22 is installed; the connecting section 121 is provided with a limit slot 24 for the limit section 122 to slide, and the limit slot 24 is arranged along the radial direction of the clamping portion 12; in order to limit the limit The movement range of the segment 122 is to prevent the limiting segment 122 from being separated from the connecting segment 121. The limiting slide 25 is welded on the side wall of the limiting segment 122, and a limiting slide for the sliding of the limiting slide 25 is provided on the limiting segment 122. Slot 27, the limit chute 27 communicates with the limit slot 24, the limit chute 27 is arranged along the radial direction of the clamping portion 12, and the limit chute 27 is provided with a drive for driving the limit slider 25 to the clamping portion 12 A second return spring 26 that moves on one side of the inner cavity, one end of the second return spring 26 is welded with the groove wall of the limit chute 27, and the other end is welded with the limit slider 25.

Referring to FIG. 4 , the linkage 123 is connected with the insertion rod 22 , and the linkage 123 drives the limiting section 122 to move to the side away from the inner cavity of the clamping portion 12 . The linkage 123 includes a guide block 1232 and is used to drive the insertion rod 22 The first return spring 1233 that moves toward the inner cavity side of the sleeve 1, the groove wall of the sliding groove 23 is provided with a sliding guide groove 1231 for the sliding of the sliding block 1232, and the sliding groove 1231 is along the sliding groove 23. The guide block 1232 is arranged in the length direction, and the guide block 1232 is welded with the side wall of the insertion rod 22 , and the guide block 1232 includes a first movement stage and a second movement stage. In the first movement stage, the guide block 1232 slides along the guide groove 1231 in the second movement stage, the guide block 1232 drives the limit section 122 to slide along the limit groove 24, and drives the limit section 122 to abut against the wall of the oil well; through the motor 211 drives the threaded rod 212 to rotate. Under the action of the guide rod 2141, the threaded rod 212 drives the sleeve 213 to move in the axial direction of the threaded rod 212, and the sleeve 213 drives the push block 215 to move. 222 abuts, with the downward movement of the circular truncated section 2152, the length of the plug-in rod 22 extending out of the sliding groove 23 gradually increases, so that the plug-in section 221 is inserted into the side wall of the oil well, and the circular truncated section 2152 continues to move downward, The sliding section 222 drives the guide block 1232 to move, and the guide block 1232 drives the limit section 122 to move, so that the limit section 122 moves to the side of the oil well wall, thereby realizing the abutment between the limit section 122 and the oil well wall, and When the casing 1 is not centered in the oil well, due to the uneven wall of the oil well, the depth of the insertion rod 22 into the wall of the oil well is different. The first return spring 1233 is located in the guide chute 1231, and one end of the first return spring 1233 is welded with the guide block 1232, and the other end is with the guide chute 1231 groove wall welding.

The implementation principle of an oil drilling plugging device according to the embodiment of the present application is as follows: adjusting the motor 211 , the motor 211 drives the threaded rod 212 to rotate, and under the action of the guide rod 2141 , the threaded rod 212 drives the sleeve 213 along the axis of the threaded rod 212 Moving in the direction, the sleeve 213 drives the push block 215 to move. First, the circular truncated section 2152 is in contact with the sliding section 222. With the downward movement of the circular truncated section 2152, the length of the insertion rod 22 extending from the sliding groove 23 gradually increases. Then, the plug-in section 221 is inserted into the side wall of the oil well, the circular table section 2152 continues to move downward, the sliding section 222 drives the guide block 1232 to move, and the guide block 1232 drives the limit section 122 to move, so that the limit section 122 moves toward the oil well. One side of the well wall moves, so as to realize the contact between the limiting section 122 and the well wall of the oil well, and the plug rod 22 abuts against the cylindrical section 2151 , the threaded rod 212 continues to rotate, and the sleeve 213 drives the upper pressure plate 31 to slide along the pressure groove 111 When the rubber plug 32 is moved, force is exerted on the rubber plug 32. Since the distance between the upper pressure plate 31 and the lower pressure plate 33 is reduced, the peripheral side of the rubber plug 32 is bulged to realize the plugging of the oil well wall.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (6)

1. An oil drilling plugging device, comprising a casing (1), characterized in that, also comprising a limiting mechanism (2) and a blocking mechanism (3); The limiting mechanism (2) includes a driving assembly (21) and a plurality of plug-in rods (22) for inserting into the wall of the oil well, and the plurality of the plug-in rods (22) are arranged along the length of the casing (1). Evenly distributed in the circumferential direction, the sleeve (1) is provided with a sliding groove (23) for the insertion rod (22) to slide, and the sliding groove (23) runs along the sleeve (1). ) in the radial direction, and the number of the sliding grooves (23) and the plugging rods (22) are the same; The driving assembly (21) is used for driving the plug-in rod (22) to slide along the sliding groove (23); The plugging mechanism (3) is used for oil well plugging; The drive assembly (21) includes a threaded rod (212), a sleeve (213), a push block (215) and a guide (214). The threaded rod (212), the sleeve (213), and the push block (215) ) and the sleeve (1) are arranged coaxially; The sleeve (213) is sleeved on the threaded rod (212), and the sleeve (213) is threadedly connected to the threaded rod (212); The push block (215) is sleeved on the sleeve (213), the push block (215) is fixedly connected with the sleeve (213), and the push block (215) is located on the sleeve (1) In the inner cavity, the push block (215) includes a cylindrical section (2151) and a circular truncated section (2152) that are integrally arranged, and the insertion rod (22) extends into one end of the inner cavity of the sleeve (1) abutting with the side wall of the circular truncated segment (2152); The guide member (214) is used to move the sleeve (213) in the axial direction of the threaded rod (212); The sleeve (1) comprises a mounting part (11), a clamping part (12) and a rotating part (13) arranged in order from high to low, the mounting part (11), the clamping part (12) and the rotating part (13). The part (13) is coaxially arranged; The push block (215) is located in the inner cavity of the clamping portion (12), and the cylindrical section (2151) is slidably connected to the clamping portion (12); One end of the clamping portion (12) away from the mounting portion (11) is rotatably connected to the rotating portion (13), and one end of the threaded rod (212) is fixedly connected to the rotating portion (13), and the other end is connected to the rotating portion (13). extending into the inner cavity of the mounting portion (11) through the snap portion (12); The clamping part (12) includes a connecting section (121), a linkage (123) and a plurality of limiting sections (122) for abutting against the wall of the oil well; The plurality of limiting segments (122) are evenly distributed along the circumferential direction of the sleeve (1), and the sliding grooves (23) are located on the limiting segments (122); The connecting segment (121) is provided with a limiting groove (24) for sliding of the limiting segment (122), and the limiting groove (24) is along the radial direction of the engaging portion (12). set up; The linkage (123) is connected with the plug-in rod (22), and the linkage (123) drives the limiting section (122) to move to the side away from the inner cavity of the clamping portion (12); The linkage (123) includes a guide block (1232); The groove wall of the sliding groove (23) is provided with a sliding guide groove (1231) for the sliding block (1232) to slide, and the sliding guide groove (1231) runs along the sliding groove (23) length direction setting; The guide block (1232) is fixedly connected with the side wall of the plug-in rod (22), and the guide block (1232) includes a first movement stage and a second movement stage; In the first movement stage, the guide block (1232) slides along the guide chute (1231) to drive the insertion rod (22) to be inserted into the wall of the oil well; In the second movement stage, the guide block (1232) is in contact with the groove wall of the guide groove (1231), and the guide block (1232) drives the limiting section (122) along the limit The groove (24) slides, and the limiting section (122) is driven to abut against the wall of the oil well. 2. The oil drilling plugging device according to claim 1, wherein the plugging mechanism (3) comprises an upper pressure plate (31), a lower pressure plate (33) and a rubber plug (32); The lower pressing plate (33) is fixedly connected to one end of the clamping portion (12) close to the mounting portion (11), and the sleeve (213) penetrates the lower pressing plate (33) and protrudes into the mounting portion (11). 11) in the inner cavity, and the sleeve (213) is slidingly connected with the lower pressing plate (33); One end of the sleeve (213) protruding into the inner cavity of the mounting portion (11) is fixedly connected to the upper pressing plate (31), and the mounting portion (11) is provided with a space for the upper pressing plate (31) to slide. the pressing groove (111), the pressing groove (111) is arranged along the axial direction of the mounting portion (11); The rubber plug (32) is sleeved on the sleeve (213), and the rubber plug (32) is located between the upper pressing plate (31) and the lower pressing plate (33). 3 . The leakage plugging device for oil drilling according to claim 2 , wherein a sealing rubber ring ( 35 ) is sleeved on the peripheral wall of the upper pressure plate ( 31 ). 4 . 4 . The leakage plugging device for oil drilling according to claim 2 , wherein the guide member ( 214 ) comprises at least one guide rod ( 2141 ), and one end of the guide rod ( 2141 ) is connected to the upper pressure plate ( 4 . 31) Fixed connection, the snap portion (12) is provided with a guide groove (2142) for the guide rod (2141) to slide, and the guide groove (2142) is along the length of the snap portion (12). Axial direction setting. 5. The leakage plugging device for oil drilling according to claim 1, characterized in that, the linkage (123) further comprises a connecting rod (22) for driving the plug-in rod (22) to the inner cavity of the casing (1) A first return spring (1233) that moves laterally; the first return spring (1233) is located in the guide chute (1231), and one end of the first return spring (1233) is connected to the guide block (1232) ) is connected, and the other end is connected with the groove wall of the guide chute (1231). 6. The leakage plugging device for oil drilling according to claim 1, characterized in that, a limiting block (25) is provided on the limiting section (122), and a connecting section (121) is provided with a block for the A limit chute (27) on which the limit slider (25) slides, the limit chute (27) communicates with the limit slot (24), and the limit chute (27) is along the The clamping portion (12) is arranged in the radial direction, and the limiting chute (27) is provided with a spacer for driving the limiting slider (25) to move toward the inner cavity side of the clamping portion (12). the second return spring (26).

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