Well hole cleaning-based casing pipe safe tripping-in assembly in highly-deviated well hole

Abstract

The invention relates to the technical field of oil well construction, in particular to a safe casing tripping-in assembly in a highly-deviated borehole based on borehole cleaning, which comprises an L-shaped bottom frame, a turning plate is hinged in a groove formed in a top frame of the L-shaped bottom frame, one end of the turning plate extends to the outside of the L-shaped bottom frame, and an air cylinder is arranged at the end, away from the frame, of the inner wall of the bottom of the L-shaped bottom frame. A top plate is fixedly mounted on the top of the cylinder and at the bottom end of the turning plate; according to the invention, on the basis of adaptive clamping of the casing, the oblique insertion angle of the casing is directionally adjusted according to the internal inclination angle of the main borehole, so that the directional underground insertion effect of the casing is favorably realized; and the hole opening and the interior of the main well hole can be cleaned before the casing pipe enters the well, so that the main well hole is kept smooth, the situation that the stability of the casing pipe is influenced by casing pipe deviation and brought-in sundries is reduced, and the oblique insertion efficiency of the underground casing pipe is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil well construction, in particular to a casing safety running component in a highly deviated wellbore based on wellbore cleaning. Background Art

[0002] The main wellbore refers to the main vertical or directionally inclined wellbore initially drilled during the oil, gas or geothermal extraction process. It is the core part of the entire drilling operation and usually extends from the surface to the target reservoir. During the main wellbore drilling process, the safe running of the casing is a key step to ensure the stability of the wellbore and the smooth progress of subsequent operations. At present, conventional downhole casing introduction equipment mostly uses a main wellbore with a vertical structure, and it is difficult to run the casing into an inclined main wellbore. For example, the patent authorization announcement number is CN216553813U, a casing straightener used for a radial drilling downhole guide. After the casing body is placed inside two connecting rings, the screws and the connecting ring threads rotate according to their outer diameters, and the rotating block is driven to rotate inward, and the arc-shaped clamping plate is translated inward, so that the multi-directional clamping of the casing body can be realized. Straightening work can be achieved for casings of different sizes; Although the above patent content can clamp casings of various sizes and then insert them into the wellbore, it still has certain limitations in actual use: First, the above patent content is similar to the conventional casing guide device used in downhole, which is to straighten the casing and send it into the wellbore through the set limit clamping mechanism. However, most of these guide structures are suitable for the main wellbore of vertical structure. When facing the main wellbore with directional inclination angle, it is difficult to accurately judge and adjust the inclination angle of the casing according to the inclination angle of the main wellbore, which easily increases the risk of deviation when the casing is lowered and affects the effect of the casing lowering into the well. Secondly, since the mouth of the main oil wellbore is usually set on the ground, and the mouth position is easily left with construction soil or buried by construction waste when the wellbore is excavated and drilled, it is not only easy to make the wellhead position and diameter difficult to determine when the subsequent casing is inserted, but also easy to be brought into the wellbore when the casing is lowered, resulting in changes in the inner diameter of the wellbore and affecting the fixing effect of the casing, which greatly affects the efficiency of the oblique insertion of the casing. Summary of the invention

[0003] The purpose of the present invention is to adjust the oblique insertion angle of the casing according to the internal inclination angle of the main wellbore based on the adaptive clamping of the casing, which is conducive to achieving the directional downhole insertion effect of the casing; the eye and the interior of the main wellbore can be cleaned before the casing is entered into the well to keep the main wellbore unobstructed, reduce the casing deviation and the introduction of debris that affect the stability of the casing, and effectively improve the downhole casing oblique insertion efficiency.

[0004] The object of the present invention can be achieved by the following technical scheme: a casing safety lowering assembly in a high-angle wellbore based on wellbore cleaning, comprising an L-shaped bottom frame, a flap is hingedly connected inside a groove arranged at the top frame of the L-shaped bottom frame, and one end of the flap extends to the outside of the L-shaped bottom frame, a cylinder is arranged on the bottom inner wall of the L-shaped bottom frame away from the frame end, and a top plate is fixedly installed on the top of the cylinder and located at the bottom end of the flap through a push rod, a boosting mechanism is arranged on the top of the top plate, and a cleaning mechanism is arranged on the bottom inner wall of the L-shaped bottom frame at a position on one side of the bottom of the top plate; Among them, the boost mechanism includes a fixed plate, which is fixedly installed on the top surface of the top plate, and a motor 1 is arranged at the center of one side of the fixed plate, a driving gear is arranged at the output end of the motor 1, and vertical plates are fixedly installed at both ends of the top surface of the fixed plate, one group of the vertical plates is fixedly installed with a limit frame with a concave side profile on the top, and a transverse groove is arranged on the bottom surface of the limit frame, a concave card frame is arranged at one end inside the limit frame, and a limit component is arranged at the other end inside the limit frame.

[0005] Furthermore, the limiting assembly includes a convex slide, which is slidably connected to the bottom inner wall of the limiting frame at one end, and the front and rear ends of the convex strip on the top of the convex slide are slidably sleeved with clamps, and the opposite surfaces of the two groups of clamps are fixedly installed with wedge-shaped blocks at the upper and lower ends, and the front and rear groups of the wedge-shaped blocks are symmetrical front and back.

[0006] Furthermore, a second motor is arranged at the front end of the top of the convex skateboard through a machine base, and a spiral rotating rod is fixedly installed on the output shaft at the rear end of the second motor through an axle rod. The first spiral rotating rod runs through the two sets of clamping plates, and the spiral grooves arranged on the outside of the rod body at both ends of the spiral rotating rod with the center as the axis are arranged in opposite directions.

[0007] Furthermore, a spiral rotating rod 2 is rotated inside and penetrated by a vertical plate near one end of the motor, and one end of the spiral rotating rod 2 extends to the top of the driving gear and is fixedly installed with a driven gear, the driving gear is meshed with the driven gear, and a push cylinder is penetrated by another group of vertical plates.

[0008] Furthermore, the long rod fixedly installed at one end of the top of the push cylinder extends to the inside of the limit frame and is fixedly connected to the bottom of the convex slide plate, one end of the spiral rotating rod 2 is inserted into the inside of the push cylinder, and the spiral rotating rod 2 is adapted to the spiral groove on the inner wall of the push cylinder.

[0009] Furthermore, the cleaning mechanism includes a bottom cylinder and a top cylinder, the bottom cylinder is fixed through the center of the bottom inner wall of the L-shaped bottom frame, and the top cylinder is sleeved on the outside of the bottom cylinder, and several groups of damping spring shock-absorbing rings are arranged between the bottom of the top cylinder and the corresponding bottom inner wall of the L-shaped bottom frame, and the top cylinder is located at one end of the bottom of the top plate.

[0010] Furthermore, a spiral rod is threadedly connected to the center of the top tube opening of the bottom tube, the top of the spiral rod is rotatably connected to the inner wall of the top tube, and the bottom of the spiral rod extends to the middle and lower end of the bottom tube and is fixedly installed with a drill disc, and a cleaning ring is fixedly installed near the bottom end of the bottom tube through two groups of connecting rods on the inner wall, and a plurality of groups of triangular protrusions are fixedly installed on the inner wall of the cleaning ring at equal distances.

[0011] Furthermore, a limit plate is fixedly installed at the middle and lower end of one side of the L-shaped bottom frame, and a slot is provided at the end of the limit plate away from the L-shaped bottom frame, and a stop bar is respectively penetrated through the front and rear inner walls of the slot, and the opposite surfaces of the two groups of the stop bars are located on the upper and lower end surfaces and are symmetrically arranged on the beveled surfaces, and a damping spring shock-absorbing ring 2 is commonly provided between the ends of the two groups of the stop bars away from each other and the corresponding inner walls of the through slots.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The invention provides a boosting mechanism, one end of the casing is loaded into the limit frame, the limit assembly is used to limit and clamp the end of the casing, and then the cylinder is used to push the flap and the casing to flip and deflect into an inclined structure, and the spiral rotating rod 2 is rotated in coordination with the internal thread groove of the push cylinder to realize the synchronous movement of the push cylinder, the long rod, the limit assembly and the casing, and push the casing to be inserted into the main wellbore below, which not only automatically clamps and limits the casing, but also can automatically boost the oblique insertion of the stably clamped casing into the corresponding main wellbore after adjusting it to any inclination angle, and at the same time, after use, the casing can be easily pulled out in time, thereby improving the casing downhole efficiency; The present invention is assisted by setting a cleaning mechanism. Before obliquely inserting the casing, the device is first moved to the mouth of the main wellbore, and the bottom cylinder is aligned with the wellbore. Then, the cleaning mechanism can be used to clean the mouth of the wellbore, and the drill disc rotates to open the mouth, reducing the burial of debris, thereby keeping the main wellbore unobstructed and facilitating the subsequent insertion of the casing. And during the process of tilting and flipping the sleeve, when the bottom of the sleeve is flipped and inserted into the slot, the bottom end of the tube body presses against the top inclined surfaces of the two groups of push bars, forcing the two groups of push bars to separate, and the damping spring shock absorber ring is compressed until the two groups of push bars jointly exert limited pressure on the bottom of the inclined sleeve to maintain the stability of the oblique insertion of the sleeve and reduce the deviation of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a plan view schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the limiting frame of the present invention; Figure 4 It is a side cross-sectional schematic diagram of the combination of the limiting frame and the limiting assembly of the present invention; Figure 5 This is a cross-sectional view of the L-shaped bottom frame and the cleaning mechanism of the present invention; Figure 6 It is a top sectional view of the bottom tube of the present invention; Figure 7 It is a side sectional view of the limiting plate of the present invention.

[0015] In the figure: 1. L-shaped bottom frame; 2. flap; 3. cylinder; 4. top plate; 5. booster mechanism; 51. fixed plate; 52. motor 1; 53. driving gear; 54. vertical plate; 55. limit frame; 56. limit assembly; 561. convex slide plate; 562. clamping plate; 563. wedge-shaped stop block; 564. motor 2; 565. spiral rotating rod 1; 57. spiral rotating rod 2; 58. driven gear; 59. push cylinder; 510. long rod; 6. cleaning mechanism; 61. bottom cylinder; 62. top cylinder; 63. damping spring shock absorber ring 1; 64. spiral plug rod; 65. drill disc; 66. cleaning ring; 7. limit plate; 71. stop bar; 72. damping spring shock absorber ring 2. DETAILED DESCRIPTION

[0016] The technical scheme of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1: Please read Figure 1 - Figure 7 As shown, a casing safety lowering assembly in a high-angle wellbore based on wellbore cleaning comprises an L-shaped bottom frame 1, a flap 2 is hingedly connected inside a groove arranged at the top frame of the L-shaped bottom frame 1, and one end of the flap 2 extends to the outside of the L-shaped bottom frame 1, a cylinder 3 is arranged on the inner wall of the bottom of the L-shaped bottom frame 1 away from the frame end, and a top plate 4 is fixedly installed on the top of the cylinder 3 and located at the bottom end of the flap 2 through a push rod, and a boosting mechanism 5 is arranged on the top of the top plate 4; The boost mechanism 5 includes a fixed plate 51, which is fixedly mounted on the top surface of the top plate 4, and a motor 52 is arranged at the center of one side of the fixed plate 51, and a driving gear 53 is arranged at the output end of the motor 52, and vertical plates 54 are fixedly mounted at both ends of the top surface of the fixed plate 51, and a limit frame 55 with a concave side section is fixedly mounted on the top of one group of vertical plates 54, and a horizontal groove is arranged on the bottom surface of the limit frame 55, a concave card frame is arranged at one end of the limit frame 55, and a limit component 56 is arranged at the other end of the limit frame 55; The limiting assembly 56 includes a convex slide plate 561, which is slidably connected to the inner wall of the bottom of the limiting frame 55 at one end, and a clamp plate 562 is slidably sleeved at the front and rear ends of the convex strip on the top of the convex slide plate 561. The opposite surfaces of the two groups of clamp plates 562 are fixedly installed with wedge-shaped abutments 563 at the upper and lower ends, and the front and rear groups of wedge-shaped abutments 563 are symmetrical front and back. A motor 2 564 is arranged at the front end of the top of the convex slide plate 561 through the base, and a spiral rotating rod 1 565 is fixedly installed on the output shaft at the rear end of the motor 2 564 through a shaft rod. The spiral rotating rod 1 565 runs through the inside of the two groups of clamp plates 562, and the spiral grooves arranged on the outside of the rod bodies at both ends of the spiral rotating rod 1 565 with the center as the axis are arranged in opposite directions. First, one end of the sleeve is loaded into the limit frame 55, the middle section of the sleeve is clamped inside the concave clamping frame, and one end of the sleeve is clamped inside the limit assembly 56, and the limit assembly 56 is used to limit and clamp the end of the sleeve; The specific clamping process includes: the end of the sleeve is located between the front and rear two groups of clamping plates 562, and is placed between the four groups of wedge-shaped abutting blocks 563, and then the second motor 564 is started to drive the spiral rotating rod 1 565 to rotate. Since the threads at both ends of the spiral rotating rod 1 565 are arranged in opposite directions, they respectively cooperate with the internal thread grooves of the two groups of clamping plates 562 to achieve the two groups of clamping plates 562 to approach each other and clamp the sleeve together, and the sleeve is pressed between the four groups of wedge-shaped abutting blocks 563 to achieve stable clamping of the sleeve; A spiral rod 2 57 is provided inside the vertical plate 54 near the end of the motor 1 52, and one end of the spiral rod 2 57 extends to the top of the driving gear 53 and is fixedly installed with a driven gear 58, and the driving gear 53 is meshed with the driven gear 58. A push cylinder 59 is provided through another set of vertical plates 54, and a long rod 510 fixedly installed at one end of the top of the push cylinder 59 extends to the inside of the limit frame 55 and is fixedly connected to the bottom of the convex slide 561. One end of the spiral rod 2 57 is inserted into the inside of the push cylinder 59, and the spiral rod 2 57 is adapted to the spiral groove on the inner wall of the push cylinder 59. After the sleeve is defined, the cylinder 3 is started to use the push rod to push the top plate 4 upward, and simultaneously push the end of the flap 2 upward, forcing the flap 2 and the sleeve defined on its surface to turn over synchronously until the sleeve is deflected to a suitable angle; Then the motor 1 52 is started to drive the driving gear 53 to rotate clockwise, and the driving gear 53 is meshed with the driven gear 58 to realize the counterclockwise rotation of the driven gear 58 and the spiral rotating rod 2 57, and the spiral rotating rod 2 57 rotates in coordination with the internal thread groove of the push tube 59, so as to realize the synchronous movement of the push tube 59, the long rod 510, the limit assembly 56 and the casing, and push the casing to be inserted into the main wellbore below, and the oblique insertion angle of the casing can be adjusted according to the internal inclination angle of the wellbore; After the casing is used, the motor 1 52 is started again, which drives the driving gear 53 to rotate counterclockwise, and the driving gear 53 meshes with the driven gear 58 to realize the clockwise rotation of the driven gear 58 and the spiral rotating rod 2 57, and the spiral rotating rod 2 57 rotates in coordination with the internal thread groove of the push tube 59, so as to realize the synchronous movement of the push tube 59, the long rod 510, the limit assembly 56 and the casing, and pull the casing to the outside of the main wellbore and lift it obliquely upward, so as to extract the casing from the wellbore; It not only automatically clamps and limits the casing, but can also adjust the stably clamped casing to any inclination angle and automatically push it obliquely into the corresponding main wellbore. At the same time, after use, it can also facilitate the timely withdrawal of the casing, thereby improving the efficiency of casing lowering into the well.

[0018] Example 2: Please refer to Figure 5 - Figure 6 As shown, a cleaning mechanism 6 is arranged on the bottom inner wall of the L-shaped bottom frame 1 at one side of the bottom of the top plate 4, and the cleaning mechanism 6 comprises a bottom tube 61 and a top tube 62, the bottom tube 61 is fixedly passed through the center of the bottom inner wall of the L-shaped bottom frame 1, and the top tube 62 is sleeved on the outside of the bottom tube 61, and a plurality of groups of damping spring shock absorbing rings 63 are arranged between the bottom of the top tube 62 and the corresponding bottom inner wall of the L-shaped bottom frame 1; The top cylinder 62 is located at one end of the bottom of the top plate 4, and a spiral rod 64 is threadedly connected to the center of the top tube opening of the bottom cylinder 61. The top of the spiral rod 64 is rotatably connected to the inner wall of the top of the top cylinder 62, and the bottom of the spiral rod 64 extends to the middle and lower end of the bottom cylinder 61 and is fixedly installed with a drill disc 65. A cleaning ring 66 is fixedly installed near the bottom end of the bottom cylinder 61 through two groups of connecting rods on the inner wall, and a number of groups of triangular protrusions are fixedly installed on the inner wall of the cleaning ring 66 at equal distances.

[0019] Before the oblique insertion of the casing, the device is first moved to the wellhead of the main wellbore, and the bottom cylinder 61 is aligned with the eye opening of the main wellbore, and the cleaning mechanism 6 can be used to clean the eye opening of the main wellbore, and the cylinder 3 is started, which uses the push rod to pull the top plate 4 to sink downward, and at the same time presses the top cylinder 62 to sink downward and presses the damping spring shock absorber ring 63 to compress, and the spiral insertion rod 64 sinks with the top cylinder 62 and moves relative to the spiral groove at the top of the bottom cylinder 61, forcing the spiral insertion rod 64 to push the drill disc 65 to rotate and sink and insert into the corresponding wellbore. The drill disc 65 rotates to open the eye opening of the wellbore, reducing dust burial, thereby keeping the eye opening of the main wellbore unobstructed, facilitating the subsequent insertion of the casing and reducing the situation where the casing brings the mud at the eye opening of the wellbore into the wellbore; It is worth noting that after cleaning, the cylinder 3 is driven again to use the push rod to pull the top plate 4 to move upward, and the pressure on the top cylinder 62 is lost, and it is reset upward under the action of the rebound force of the damping spring shock absorber ring 63, and the helical plug rod 64 is pulled upward and rotated relative to the threaded groove on the top surface of the bottom cylinder 61 again. As a result, the helical plug rod 64 pulls the drill disc 65 to rotate in the opposite direction upward and away from the main wellbore, and the drill disc 65 is inserted into the inside of the cleaning ring 66. The drill disc 65 rotates along the inside of the cleaning ring 66, and the surface of the drill disc 65 is cleaned by using a plurality of groups of triangular protrusions to speed up the cleaning of the surface of the drill disc 65 and facilitate continuous use.

[0020] The main wellbore is cleaned before the auxiliary casing is lowered into the well, thereby keeping the main wellbore unobstructed so that the casing can be accurately lowered into the well, further improving the efficiency of the oblique insertion of the casing into the well.

[0021] Example 3: Please refer to Figure 7 As shown, a limit plate 7 is fixedly installed at the middle and lower end of one side of the L-shaped bottom frame 1, and a card slot is provided at the end of the limit plate 7 away from the L-shaped bottom frame 1, and a stop bar 71 is respectively penetrated through the front and rear inner walls of the card slot, and the opposite surfaces of the two groups of stop bars 71 are located at the upper and lower end surfaces and are arranged in symmetrical beveled surfaces, and a damping spring shock absorbing ring 2 72 is commonly provided between the ends of the two groups of stop bars 71 away from each other and the corresponding inner walls of the through slots; This embodiment is used in conjunction with the first embodiment. During the process of the sleeve tilting and flipping, when the bottom of the sleeve is flipped and inserted into the slot, the bottom end of the tube body presses against the top inclined surfaces of the two groups of push bars 71, forcing the two groups of push bars 71 to separate and the damping spring shock-absorbing ring 2 72 to be compressed until the two groups of push bars 71 jointly exert limited pressure on the bottom of the tilted sleeve to maintain the stability of the sleeve's oblique insertion and reduce the sleeve's deviation.

[0022] When the present invention is used, the device is first moved to the wellhead of the wellbore, and the bottom cylinder 61 is aligned with the wellbore, and the cylinder 3 is started to use the push rod to pull the top plate 4 to sink downward, and at the same time press the top cylinder 62 to sink downward and press the damping spring shock-absorbing ring 63 to compress, and the spiral rod 64 sinks with the top cylinder 62 and moves relative to the spiral groove at the top of the bottom cylinder 61, so that the spiral rod 64 is forced to push the drill plate 65 to self-rotate and sink and insert the drill plate 65 into the corresponding wellbore to rotate and open the wellhead; Next, one end of the sleeve is loaded into the limit frame 55, the middle section of the sleeve is clamped in the concave clamping frame, and one end of the sleeve is clamped in the limit assembly 56, the end of the sleeve is located between the front and rear two groups of clamping plates 562, and is placed between the four groups of wedge-shaped abutting blocks 563, and then the second motor 564 is started to drive the spiral rotating rod 1 565 to rotate. Since the threads at both ends of the spiral rotating rod 1 565 are arranged in opposite directions, they cooperate with the internal thread grooves of the two groups of clamping plates 562 respectively to achieve the two groups of clamping plates 562 to approach each other and clamp the sleeve together, and the sleeve is pressed between the four groups of wedge-shaped abutting blocks 563 to achieve stable clamping of the sleeve; Furthermore, one end of the sleeve is loaded into the limit frame 55, the middle section of the sleeve is clamped inside the concave clamping frame, and one end of the sleeve is clamped inside the limit assembly 56, and the limit assembly 56 is used to limit and clamp the end of the sleeve; The specific clamping process includes: the end of the sleeve is located between the front and rear two groups of clamping plates 562, and is placed between the four groups of wedge-shaped abutting blocks 563, and then the second motor 564 is started to drive the spiral rotating rod 1 565 to rotate. Since the threads at both ends of the spiral rotating rod 1 565 are arranged in opposite directions, they respectively cooperate with the internal thread grooves of the two groups of clamping plates 562 to achieve the two groups of clamping plates 562 to approach each other and clamp the sleeve together, and the sleeve is pressed between the four groups of wedge-shaped abutting blocks 563 to achieve stable clamping of the sleeve; After cement slurry is injected through the casing and the cementing operation is completed, the motor 1 52 is started again, which drives the driving gear 53 to rotate counterclockwise, and the driving gear 53 is engaged with the driven gear 58 to realize the clockwise rotation of the driven gear 58 and the spiral rotating rod 2 57, and the spiral rotating rod 2 57 cooperates with the internal thread groove of the push tube 59 to rotate, so as to realize the synchronous movement of the push tube 59, the long rod 510, the limit assembly 56 and the casing, and pull the casing to the outside of the wellbore and lift it obliquely upward, so as to extract the casing from the main wellbore.

[0023] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A casing safe running assembly in a highly deviated wellbore based on wellbore cleaning, comprising an L-shaped bottom frame (1), characterized in that: A flap (2) is hingedly connected inside a groove arranged at the top frame of the L-shaped bottom frame (1), and one end of the flap (2) extends to the outside of the L-shaped bottom frame (1); a cylinder (3) is arranged on the bottom inner wall of the L-shaped bottom frame (1) away from the frame end, and a top plate (4) is fixedly mounted on the top of the cylinder (3) and located at the bottom end of the flap (2) through a push rod, a boosting mechanism (5) is arranged on the top of the top plate (4), and a cleaning mechanism (6) is arranged on the bottom inner wall of the L-shaped bottom frame (1) at a position on one side of the bottom of the top plate (4); The boost mechanism (5) comprises a fixed plate (51), the fixed plate (51) being fixedly mounted on the top surface of the top plate (4), and a motor 1 (52) being arranged at the center of one side of the fixed plate (51), a driving gear (53) being arranged at the output end of the motor 1 (52), and vertical plates (54) being fixedly mounted at both ends of the top surface of the fixed plate (51), a limit frame (55) having a concave side section being fixedly mounted on the top of one group of the vertical plates (54), and a transverse groove being arranged on the bottom surface of the limit frame (55), a concave clamping frame being arranged at one end inside the limit frame (55), and a limit assembly (56) being arranged at the other end inside the limit frame (55).

2. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 1, characterized in that: The limiting assembly (56) comprises a convex slide plate (561), the convex slide plate (561) being slidably connected to the inner wall of the bottom of the limiting frame (55) at one end, the front and rear ends of the convex strips on the top of the convex slide plate (561) are both slidably sleeved with clamping plates (562), and the opposite surfaces of the two groups of clamping plates (562) are both fixedly mounted with wedge-shaped stop blocks (563) at the upper and lower ends, and the front and rear groups of the wedge-shaped stop blocks (563) are symmetrical front and rear.

3. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 2, characterized in that: A second motor (564) is arranged at the front end of the top of the convex slide plate (561) through a machine base, and a spiral rotating rod (565) is fixedly installed on the output shaft at the rear end of the second motor (564) through a shaft rod. The first spiral rotating rod (565) runs through the inside of the two groups of clamping plates (562), and the spiral grooves arranged on the outside of the rod body at both ends of the spiral rotating rod (565) with the center as the axis are arranged in opposite directions.

4. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 1, characterized in that: A second spiral rotating rod (57) is provided inside a vertical plate (54) near one end of the motor (52) and rotates therethrough, and one end of the second spiral rotating rod (57) extends to the top of the driving gear (53) and is fixedly mounted with a driven gear (58), the driving gear (53) meshing with the driven gear (58), and a push cylinder (59) is provided through another set of the vertical plates (54).

5. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 4, characterized in that: The long rod (510) fixedly installed at one end of the top of the push cylinder (59) extends into the interior of the limit frame (55) and is fixedly connected to the bottom of the convex slide plate (561). One end of the second spiral rotating rod (57) is inserted into the interior of the push cylinder (59), and the second spiral rotating rod (57) is adapted to the spiral groove on the inner wall of the push cylinder (59).

6. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 1, characterized in that: The cleaning mechanism (6) comprises a bottom tube (61) and a top tube (62); the bottom tube (61) is fixedly inserted through the center of the bottom inner wall of the L-shaped bottom frame (1), and the top tube (62) is sleeved on the outside of the bottom tube (61); a plurality of groups of damping spring shock absorbing rings (63) are arranged between the bottom of the top tube (62) and the corresponding bottom inner wall of the L-shaped bottom frame (1); and the top tube (62) is located at one end of the bottom of the top plate (4).

7. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 6, characterized in that: A spiral rod (64) is rotatably connected to the center of the top opening of the bottom cylinder (61), the top of the spiral rod (64) is rotatably connected to the inner wall of the top of the top cylinder (62), and the bottom of the spiral rod (64) extends to the middle and lower end of the bottom cylinder (61) and is fixedly mounted with a drill disc (65), and a cleaning ring (66) is fixedly mounted near the bottom end of the bottom cylinder (61) through two groups of connecting rods on the inner wall, and a plurality of groups of triangular protrusions are fixedly mounted on the inner wall of the cleaning ring (66) at equal distances.

8. The casing safe running assembly in a highly deviated wellbore based on wellbore cleaning according to claim 1, characterized in that: A limiting plate (7) is fixedly mounted at the middle and lower end of one side of the L-shaped bottom frame (1), and a slot is provided at one end of the limiting plate (7) away from the L-shaped bottom frame (1), and a stopper bar (71) is respectively provided through the front and rear inner walls of the slot, and the opposite surfaces of the two groups of the stopper bars (71) are arranged on symmetrical chamfered surfaces located on the upper and lower end surfaces, and a damping spring shock absorbing ring (72) is commonly provided between the ends of the two groups of the stopper bars (71) away from each other and the corresponding inner walls of the through slots.

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