A structure of a drill pipe with a bypass channel for preventing pipe sticking

By designing an anti-sticking drill string structure with a mud bypass channel, the problems of drill string blockage and wellbore pressure imbalance caused by mud caking and gravel were solved, achieving safety and efficiency in the drilling process.

CN120592571BActive Publication Date: 2025-10-24SHANDONG PETROCHEMICAL INST
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Patent Information

Application Number
CN202511118622.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-08-11
Publication Date
2025-10-24
Estimated Expiration
2045-08-11

AI Technical Summary

Technical Problem

The mud used in existing drilling tools may contain clumps and large stones due to uneven mixing, which can cause blockage of the drilling tools. At the same time, the continuous flow of mud through the motor may cause wellbore pressure imbalance or mud leakage. Rock cuttings and other debris inside the wellbore may also enter the drilling tools and cause stuck pipe accidents.

Method used

A drill string structure with a mud bypass channel was designed, including a through pipe, a feed hopper, a bypass valve assembly, an anti-sticking assembly, and a screen. The screen filters lumps and gravel in the mud, and the bypass valve assembly controls the mud flow path to prevent wellbore pressure imbalance and stuck drill accidents.

Benefits of technology

It effectively prevents large impurities in the mud from clogging the drill string, optimizes the mud circulation system, reduces the risk of stuck drill bit, improves drilling speed and efficiency, and prevents drill string damage and mud leakage.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application provides a kind of stuck prevention tool structure with slurry bypass channel, it is related to drilling tool technical field, including pipe, feed hopper, bypass valve assembly and anti-jamming component, two first bypass holes are set in pipe, the bottom of feed hopper is fixedly connected with screen, the bottom of anti-jamming component is provided with drill bit, bypass valve assembly includes the valve body fixedly connected in the inner cavity of pipe, the inner wall bottom of valve body is fixedly connected with limit ring, the bottom of valve body is fixedly connected with sleeve ring, anti-jamming component includes the connecting ring fixedly connected in the top of drill bit, a plurality of second bypass holes are set in connecting ring, the top of connecting ring is fixedly connected with drill rod, the surface of drill rod is fixedly connected with a plurality of sliding rings, the automatic closure of bypass valve assembly is controlled, the circulation flow of slurry in bypass channel inner cavity is controlled, the impurities in slurry are avoided to cause the inner cavity of drilling tool to be blocked, and the stuck accident of drill rod and drill bit in the process of rotation is reduced by anti-jamming component.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling tools, in particular to a stuck-preventing drilling tool structure with a mud bypass channel. BACKGROUND

[0002] Drilling tools are collectively referred to as tools used in hole digging and drilling operations, mainly divided into two categories of drilling (well drilling) drilling tools and metallurgical furnace drilling tools. In well drilling operations, sticking is a common and serious problem that may cause interruption of well drilling operations, equipment damage and even personnel injury. The reasons for sticking are various, including but not limited to sticking caused by long-term standing of drilling tools in the well, sticking caused by wellbore shrinkage or sand settling, and sticking caused by formation collapse or falling objects in the well. These sticking conditions not only affect the drilling efficiency, but also increase the drilling cost. Therefore, preventing and solving the sticking problem is an important link in the drilling technology.

[0003] Disadvantages in the prior art: The mud used in the existing drilling tools is usually composed of water, bentonite, treating agent, weighting material, etc. Therefore, there may be lumps generated by uneven mixing in the mud, and large-size stones may also be mixed in the mud during use. When the mud flows through the inner cavity of the drilling tool, it may cause sticking accidents to occur. At the same time, when the drill pipe is pulled out of the wellbore during tripping, if the mud continues to flow through the motor, it may cause imbalance of the wellbore pressure or lead to mud leakage. The cuttings in the inner cavity of the wellbore may also enter the drilling tool to cause sticking accidents. SUMMARY

[0004] The problem to be solved by the present application is that the mud used in the existing drilling tools may have lumps generated by uneven mixing and large-size stones, which may cause the drilling tool to be blocked. At the same time, if the mud continues to flow through the motor, it may cause imbalance of the wellbore pressure or lead to mud leakage. The cuttings in the inner cavity of the wellbore may also enter the drilling tool to cause sticking accidents.

[0005] In order to solve the above technical problems, the present application provides a stuck-preventing drilling tool structure with a mud bypass channel, which comprises a pipe and a feed hopper fixedly connected to the top end of the pipe. A bypass valve assembly for controlling mud circulation is arranged on the upper part of the inner cavity of the pipe. Two first bypass holes are formed in the pipe. A stuck-preventing assembly is arranged on the lower part of the inner cavity of the pipe. A screen is fixedly connected to the bottom end of the feed hopper. A drill bit is arranged at the bottom end of the stuck-preventing assembly.

[0006] The bypass valve assembly comprises a valve body fixedly connected to the inner cavity of the pipe. A limiting ring is fixedly connected to the inner wall of the bottom end of the valve body. A sleeve ring is fixedly connected to the bottom end of the valve body.

[0007] The anti-sticking assembly comprises a connecting ring fixedly connected to the top end of the drill bit, a plurality of second bypass holes are formed in the connecting ring, a drill rod is fixedly connected to the top end of the connecting ring, and a plurality of sliding rings are fixedly connected to the surface of the drill rod.

[0008] Preferably, the feeding hopper is connected to the inner cavity of the through pipe through a screen, and the inner cavities of the valve body and the sleeve ring are connected.

[0009] Preferably, the inner cavity of the valve body is provided with a piston, the surface of the piston is sleeved with a spring, the spring is located between the valve body and the piston, and the piston is movably connected to the top end of the limiting ring.

[0010] Preferably, a third bypass hole is formed in the valve body, the third bypass hole is in position correspondence with and connected to the first bypass hole, and the inner cavity of the piston is connected to the inner cavities of the valve body and the sleeve ring.

[0011] Preferably, a motor rotor is arranged in the middle of the inner cavity of the through pipe, a transmission shaft is fixedly connected to the bottom end of the motor rotor, the motor rotor is rotatably connected to the inner cavity of the sleeve ring, an adapter is fixedly connected to the bottom end of the transmission shaft, the adapter is fixedly connected to the top end of the drill rod, and the bottom end of the drill rod is fixedly connected to the drill bit.

[0012] Preferably, a fixed sleeve is fixedly connected to one side of the inner cavity of the through pipe, a plurality of sliding grooves are formed in the inner wall of the fixed sleeve, and the sliding rings are movably connected in position correspondence with the sliding grooves.

[0013] Preferably, the space between the through pipe and the motor rotor and the transmission shaft is arranged as a bypass channel, four first channels are formed around the surface of the adapter, a second channel is formed in the middle of the inner cavity of the adapter, and the bypass channel is connected to the inner cavities of the first channels and the second channel.

[0014] Preferably, sealing rings are sleeved on the upper and lower ends of the drill rod, the sealing rings are fixedly connected to the inner wall of the through pipe, a third channel is formed in the middle of the inner cavity of the drill rod, and the third channel is connected to the inner cavity of the second channel.

[0015] Preferably, four jet grooves are formed in the surface of the drill bit, a nozzle is formed in the middle of the inner cavity of the drill bit, the jet grooves are in position correspondence with the second bypass holes, and the nozzle is connected to the inner cavity of the third channel.

[0016] The technical effects and advantages of the present application are as follows:

[0017] 1. The present application is provided with a screen for simple screening of the working mud, the working mud is added to the inner cavity of the through pipe through the feed hopper, the mud is first screened through the screen, the mud is combined with water, bentonite, treatment agent, weighting material and other components, the lumps generated by mixing or the debris generated during the use of the drilling tool are screened, and then the screened mud enters the inner cavity of the through pipe through the bypass valve assembly, so that the larger lumps or debris in the mud that are not uniformly mixed enter the inner cavity of the through pipe, the larger impurities in the mud are blocked between the through pipe and the internal structure, causing the drilling tool to jam, affecting the normal use of the drilling tool, and optimizing the mud circulation system.

[0018] 2. The present application is provided with a bypass valve assembly to control the opening and closing of the first bypass hole, after the mud enters the inner cavity of the through pipe through the feed hopper, the piston is pressed by the mud, so that the spring is compressed, and the piston is pushed in the inner cavity of the valve body, when the piston is pushed, the first bypass hole is closed with the third bypass hole, the first bypass hole is blocked by the piston, so that the mud can pass through the inner cavity of the piston, the limiting sleeve and the ring, after passing through the inner cavity of the ring, the surface of the motor rotor, the motor rotor is rotated in the inner cavity of the ring, the rotating speed and torque are transmitted to the drill bit through the transmission shaft, the drilling and well repair operation is realized, at the same time, the mud can also cool the drill bit, carry the rock debris and balance the formation pressure, before the drilling tool starts, the bypass valve is in the open state, the third bypass hole is connected with the first bypass hole, allowing the mud to circulate directly through the bypass passage, avoiding the formation of high pressure in the drilling tool, thereby reducing the resistance when the motor starts, preventing the drilling tool from being damaged or the motor from being burned out due to excessive torque.

[0019] 3. The present application is provided with an anti-jamming assembly to prevent the occurrence of jamming accidents, after the mud flows through the motor rotor, it is avoided to continuously flow through the motor rotor through the adapter, causing the pressure imbalance of the inner cavity of the through pipe, the mud bypass passage adjusts the mud path to ensure that the mud can flow in the predetermined direction, the bypass passage and the anti-jamming assembly optimize the mud circulation system, improve the carrying capacity and cooling effect of the mud, thereby speeding up the drilling speed and reducing the risk of jamming, the mud enters the inner cavity of the third passage through the second passage, enters the inner cavity of the drill bit through the third passage, avoids mud leakage through the sealing ring, prevents the mud from entering the inner cavity of the drill pipe and the through pipe 1, and affects the rotation of the drill pipe, when the drill pipe rotates, the surface sliding ring rotates in the inner cavity of the sliding groove, ensuring that the drill pipe can drive the drill bit to rotate efficiently, improving the drilling effect of the drilling tool, and reducing the possibility of jamming accidents. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the overall structure schematic diagram of the embodiment one of the present application.

[0021] Figure 2 It is the overall cross-sectional structure schematic diagram of the embodiment one of the present application.

[0022] Figure 3 Schematic diagram of the bypass valve assembly structure of embodiment 1 of the present invention.

[0023] Figure 4 For the first embodiment of the present invention Figure 2 A magnified schematic diagram of the structure in the middle.

[0024] Figure 5 This is a schematic structural diagram of an anti-stuck component according to a first embodiment of the present invention.

[0025] Figure 6 For the first embodiment of the present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0026] Figure 7 For the first embodiment of the present invention Figure 2 Enlarged schematic diagram of the structure at point C in the middle.

[0027] Figure 8 This is a schematic structural diagram of an anti-stuck component according to a second embodiment of the present invention.

[0028] The accompanying drawings are marked as follows: 1. through pipe; 2. feed hopper; 3. bypass valve assembly; 31. valve body; 32. limiting ring; 33. collar; 34. piston; 35. spring; 36. third bypass hole; 4. first bypass hole; 5. anti-stuck assembly; 51. connecting ring; 52. second bypass hole; 53. drill rod; 54. sliding ring; 55. sealing ring; 56. third channel; 6. screen; 7. drill bit; 8. motor rotor; 9. transmission shaft; 10. adapter; 11. fixing sleeve; 12. slide groove; 13. bypass channel; 14. first channel; 15. second channel; 16. jet groove; 17. nozzle. DETAILED DESCRIPTION

[0029] Example 1

[0030] The present invention provides an anti-stuck drill tool structure with a mud bypass channel, such as Figure 1 - Figure 7 As shown, it includes a through pipe 1 and a feed hopper 2 fixedly connected to the top thereof, a bypass valve assembly 3 for controlling mud circulation is provided at the upper part of the inner cavity of the through pipe 1, two first bypass holes 4 are provided on the through pipe 1, an anti-stuck assembly 5 is provided at the lower part of the inner cavity of the through pipe 1, a screen 6 is fixedly connected to the bottom end of the feed hopper 2, and a drill bit 7 is provided at the bottom end of the anti-stuck assembly 5.

[0031] Further, such as Figure 1 、 Figure 2 and Figure 3 As shown, the bypass valve assembly 3 includes a valve body 31 fixedly connected to the inner cavity of the through pipe 1, a limit ring 32 is fixedly connected to the bottom end of the inner wall of the valve body 31, and a collar 33 is fixedly connected to the bottom end of the valve body 31.

[0032] Further, as Figure 1 , Figure 2 and Figure 5 The anti-jamming assembly 5 comprises a connecting ring 51 fixedly connected to the top end of the drill bit 7, four second bypass holes 52 are formed in the connecting ring 51, and a drill rod 53 is fixedly connected to the top end of the connecting ring 51, and a plurality of sliding rings 54 are fixedly connected to the surface of the drill rod 53.

[0033] Further, as Figure 2 and Figure 4 shown, the feed hopper 2 is connected and communicated with the inner cavity of the pipe 1 through the screen 6, and the inner cavities of the valve body 31 and the sleeve ring 33 are connected and communicated, when the working mud is added to the inner cavity of the pipe 1 through the feed hopper 2, the mud is first screened through the screen 6 before entering the inner cavity of the pipe 1, avoiding that the larger lumps or gravel that are not mixed evenly in the mud enter the inner cavity of the pipe 1, causing the larger impurities in the mud to be blocked between the pipe 1 and the internal structure, causing the drill to jam, affecting the normal use of the drill.

[0034] Further, as Figure 3 and Figure 4 shown, the inner cavity of the valve body 31 is provided with a piston 34, the surface of the piston 34 is sleeved with a spring 35, the spring 35 is located between the valve body 31 and the piston 34, and the piston 34 is movably connected to the top end of the limiting ring 32, after the mud enters the inner cavity of the pipe 1 through the feed hopper 2, the piston 34 is pushed in the inner cavity of the valve body 31 by the pressure of the mud, so that the spring 35 is compressed, and the piston 34 is pushed to control the opening and closing of the bypass valve assembly 3, when the piston 34 is pushed, the movement distance of the piston 34 is limited by the limiting ring 32, and the spring 35 is squeezed between the piston 34 and the limiting ring 32, so that the valve body 31 realizes the automatic closing operation.

[0035] Further, as Figure 4 shown, the valve body 31 is provided with a third bypass hole 36, the third bypass hole 36 corresponds to the position of the first bypass hole 4 and is connected and communicated, the inner cavity of the piston 34 is connected and communicated with the inner cavities of the valve body 31 and the sleeve ring 33, before the drill is started, the bypass valve assembly 3 is in an open state, the third bypass hole 36 is connected and communicated with the first bypass hole 4, allowing the mud to circulate directly through the inner cavities of the third bypass hole 36 and the first bypass hole 4, avoiding the formation of high pressure in the drill, thereby reducing the resistance when the motor starts, and preventing the drill from being damaged or the motor from being burned out due to excessive torque.

[0036] Further, as Figure 2 , Figure 4 and Figure 5As shown, the inner cavity of the through pipe 1 is provided with a motor rotor 8, the bottom end of the motor rotor 8 is fixedly connected with a transmission shaft 9, the motor rotor 8 is rotatably connected to the inner cavity of the sleeve ring 33, the bottom end of the transmission shaft 9 is fixedly connected with an adapter 10, the adapter 10 is fixedly connected with the top end of the drill pipe 53, the bottom end of the drill pipe 53 is fixedly connected with the drill bit 7, the mud passes through the inner cavities of the piston 34, the valve body 31 and the sleeve ring 33, passes through the surface of the motor rotor 8, pushes the motor rotor 8 to rotate in the inner cavity of the sleeve ring 33, and the motor rotor 8 drives the transmission shaft 9 to rotate, the rotation speed and torque are transmitted to the drill pipe 53 and the drill bit 7 through the transmission shaft 9, the well drilling and well repairing operations are realized, and the mud can also cool the drill bit 7, carry the rock debris and balance the formation pressure.

[0037] Further, as shown in Figure 2 and Figure 6 , one side of the inner cavity of the through pipe 1 is fixedly connected with a fixed sleeve 11, a plurality of sliding grooves 12 are formed in the inner wall of the fixed sleeve 11, the position of the sliding ring 54 corresponds to the position of the sliding groove 12 and is movably connected, when the transmission shaft 9 drives the drill pipe 53 to rotate, the sliding ring 54 connected on the surface rotates in the inner cavity of the sliding groove 12, ensuring the stability and smoothness of the drill pipe 53 during rotation, and reducing the possibility of sticking of the drilling tool.

[0038] Further, as shown in Figure 2 , Figure 5 and Figure 6 , the space between the through pipe 1 and the motor rotor 8 and the transmission shaft 9 is arranged as a bypass channel 13, four first channels 14 are formed around the surface of the adapter 10, a second channel 15 is formed in the inner cavity of the adapter 10, the bypass channel 13 is connected and communicated with the inner cavities of the first channel 14 and the second channel 15, the mud passes through the first channel 14 into the inner cavity of the second channel 15 after passing through the bypass channel 13, and the mud flows through the motor rotor 8 and then passes through the adapter 10 to avoid continuously flowing through the motor rotor 8, causing the mud in the inner cavity of the through pipe 1 to be out of balance, the bypass channel 13 adjusts the mud path to ensure that the mud can flow in the predetermined direction, and the bypass channel 13 and the anti-sticking assembly 5 optimize the mud circulating system, improve the carrying capacity and cooling effect of the mud, thereby speeding up the drilling speed and reducing the risk of sticking, after the drilling tool stops rotating, the mud is stopped, the piston 34 is returned to the initial position by the spring 35, the first bypass hole 4 and the third bypass hole 36 are communicated, the mud circulates in the inner cavity of the bypass channel 13, and then returns to the ground directly through the third bypass hole 36 and the first bypass hole 4, preventing the mud from stagnating at the drill bit 7 to cause sand sticking, and avoiding fatigue damage of the drilling tool due to long-term bearing of mud pressure.

[0039] Further, as shown in Figure 5 and Figure 6As shown, the upper and lower ends of the drill pipe 53 are sleeved with sealing rings 55, which are fixedly connected to the inner wall of the through pipe 1. The inner cavity of the drill pipe 53 is provided with a third channel 56 in the middle part, which is connected with the inner cavity of the second channel 15. The mud enters the inner cavity of the third channel 56 through the second channel 15, enters the inner cavity of the drill bit 7 through the third channel 56, and is prevented from leaking through the sealing ring 55 to prevent the mud from entering the inner cavity of the drill pipe 53 and the through pipe 1, affecting the rotation of the drill pipe 53, ensuring that the drill pipe 53 can drive the drill bit 7 to rotate efficiently, improving the drilling effect of the drilling tool, reducing the possibility of a stuck pipe accident, and preventing the cuttings in the inner cavity of the wellbore from entering the drilling tool through the gap during tripping to cause a stuck pipe accident.

[0040] Further, as shown in Figure 7 The surface of the drill bit 7 is provided with four jet grooves 16, and the inner cavity of the drill bit 7 is provided with a nozzle 17 in the middle part. The jet grooves 16 correspond to the positions of the second bypass holes 52, and the nozzle 17 is connected with the inner cavity of the third channel 56. The mud enters the second bypass hole 52 and flows out through the jet groove 16 and the nozzle 17. When the drilling tool reaches the rated speed, the bypass valve assembly 3 is automatically closed, and the mud is forced to be sprayed out at high speed through the jet groove 16 and the nozzle 17, forming a powerful impact force and a rock carrying capacity, ensuring that the cuttings are returned to the ground in time, and avoiding repeated fragmentation of the stratum or a stuck pipe.

[0041] Example Two

[0042] In this embodiment, the number of second bypass holes 52 is increased to eight on the basis of the first embodiment. Eight second bypass holes 52 are provided on the connecting ring 51, four of which correspond to the positions of the four jet grooves 16, and the other four second bypass holes 52 are staggered with the positions of the four jet grooves 16. The mud flows out through the jet groove 16 and the nozzle 17 from the inner cavity of the drilling tool through the second bypass hole 52. When the amount of mud is too large or the flow rate is too fast, the increased four second bypass holes 52 in this embodiment increase the discharge amount and speed, avoiding the situation that when the amount of mud is too large, the four second bypass holes 52 cannot discharge the mud in the inner cavity of the drilling tool in time, causing backflow due to accumulation in the inner cavity of the drilling machine. This embodiment increases the anti-blocking function of the drilling tool on the basis of the first embodiment, effectively increases the anti-stuck effect of the drilling tool, and makes the drilling tool applicable to normal or large amount of mud conditions.

[0043] The working principle of the present application is as follows: the mud is first screened through the screen 6, and when the mud is combined by water, bentonite, treatment agent, weighting material and the like, the lumps generated by mixing or the broken stones generated during the use of the drilling tool are screened, and after the screening treatment, the mud is introduced into the inner cavity of the through pipe 1 through the bypass valve assembly 3, so as to avoid the larger lumps or broken stones in the mud which are not uniformly mixed from entering the inner cavity of the through pipe 1, thereby avoiding the blockage of the inner cavity of the through pipe 1 and the jamming of the drilling tool. Before the drilling tool is started, the bypass valve assembly 3 is in an open state, the third bypass hole 36 is connected and communicated with the first bypass hole 4, and the mud is allowed to directly circulate through the third bypass hole 36 and the inner cavity of the first bypass hole 4, so as to avoid the formation of high pressure in the drilling tool, thereby reducing the resistance when the motor is started, preventing the damage of the drilling tool or the burning of the motor due to excessive torque, and allowing the mud to enter the inner cavity of the through pipe 1 through the feeding hopper 2 when the drilling tool is started. First, the mud flows through the piston 34, and the mud exerts pressure on the piston 34, so that the spring 35 is compressed and pushes the piston 34 to move in the inner cavity of the valve body 31, so as to control the opening and closing of the bypass valve assembly 3. When the spring 35 is compressed, the piston 34 moves downward, so that the piston 34 blocks the third bypass hole 36 and the bypass valve assembly 3 is closed. The mud flows through the inner cavity of the piston 34, passes through the inner cavities of the limiting ring 32 and the sleeve ring 33, flows through the surface of the motor rotor 8, and drives the motor rotor 8 to rotate in the inner cavity of the sleeve ring 33 when passing through the surface of the motor rotor 8. When the motor rotor 8 rotates, the transmission shaft 9 rotates, and the rotation speed and torque are transmitted to the drill pipe 53 and the drill bit 7 through the transmission shaft 9. When the transmission shaft 9 drives the drill pipe 53 to rotate, the sliding ring 54 connected on the surface rotates in the inner cavity of the sliding groove 12, so as to ensure the stability and smoothness of the drill pipe 53 during rotation and reduce the possibility of jamming of the drilling tool. After the mud flows through the motor rotor 8 in the inner cavity of the bypass passage 13, the mud enters the inner cavity of the second passage 15 through the first passage 14 on the surface of the adapter 10 from the inner cavity of the bypass passage 13, so as to avoid the continuous flow through the motor rotor 8 and cause the pressure imbalance in the inner cavity of the through pipe 1. The bypass passage 13 adjusts the mud path, so as to ensure that the mud can flow in the predetermined direction. The bypass passage 13 and the anti-jamming assembly 5 optimize the mud circulating system, improve the carrying capacity and cooling effect of the mud, thereby speeding up the drilling speed and reducing the risk of jamming. Then, the mud enters the inner cavity of the third passage 56 through the second passage 15, enters the inner cavity of the drill bit 7 through the third passage 56, and avoids leakage during the flow of the mud through the sealing ring 55, so as to avoid the influence of the mud on the rotation of the drill pipe 53 and ensure that the drill pipe 53 can drive the drill bit 7 to rotate efficiently, thereby improving the drilling effect of the drilling tool and reducing the possibility of jamming accidents. Finally, the mud enters the second bypass hole 52 and flows out through the jet groove 16 and the nozzle 17. When the drilling tool reaches the rated rotation speed, the bypass valve assembly 3 is automatically closed, and the mud is forced to be sprayed out at high speed through the jet groove 16 and the nozzle 17, so as to form strong impact force and carrying capacity, ensure that the cuttings are returned to the ground in time, avoid repeated breaking of the formation or jamming, and realize the drilling and workover operations.The mud also cools the drill bit 7, carries cuttings, and balances formation pressure.

[0044] It is to be understood that the application is not limited to particular embodiments described, as such may vary within the spirit and scope of the application. What is claimed is:

Claims

1. A structure of anti-stuck tool with mud bypass channel, comprising a through pipe (1) and a feeding hopper (2) fixedly connected to the top end of the through pipe (1), characterized in that: The inner cavity upper portion of the through pipe (1) is provided with a bypass valve assembly (3) for controlling mud circulation, two first bypass holes (4) are formed in the through pipe (1), the inner cavity lower portion of the through pipe (1) is provided with an anti-jamming assembly (5), the bottom end of the feeding hopper (2) is fixedly connected with a screen (6), and the bottom end of the anti-jamming assembly (5) is provided with a drill bit (7). The bypass valve assembly (3) comprises a valve body (31) fixedly connected to the inner cavity of the through pipe (1), the inner wall bottom end of the valve body (31) is fixedly connected with a limiting ring (32), the bottom end of the valve body (31) is fixedly connected with a sleeve ring (33), the valve body (31) is provided with a third bypass hole (36), and the third bypass hole (36) is in position correspondence and connection communication with the first bypass hole (4). The anti-jamming assembly (5) comprises a connecting ring (51) fixedly connected to the top end of the drill bit (7), the connecting ring (51) is provided with four second bypass holes (52), the top end of the connecting ring (51) is fixedly connected with a drill rod (53), and the surface of the drill rod (53) is fixedly connected with a plurality of sliding rings (54). The inner cavity middle portion of the through pipe (1) is provided with a motor rotor (8), the bottom end of the motor rotor (8) is fixedly connected with a transmission shaft (9), and the space between the through pipe (1) and the motor rotor (8) and the transmission shaft (9) is provided as a bypass channel (13).

2. The anti-stuck tool with a mud bypass passage according to claim 1, characterized in that: The feeding hopper (2) is connected in communication with the inner cavity of the through pipe (1) through the screen (6), and the inner cavities of the valve body (31) and the sleeve ring (33) are connected in communication.

3. The anti-stuck tool with a mud bypass passage according to claim 1, characterized in that: The inner cavity of the valve body (31) is provided with a piston (34), the surface of the piston (34) is sleeved with a spring (35), the spring (35) is located at the top end of the valve body (31), and the piston (34) is movably connected to the top end of the limiting ring (32).

4. The anti-stuck tool apparatus with a mud bypass passage according to claim 3, wherein: The inner cavity of the piston (34) is connected in communication with the inner cavities of the valve body (31) and the sleeve ring (33).

5. The anti-kick tool with a bypass channel according to claim 1, wherein: The motor rotor (8) is rotatably connected to the inner cavity of the sleeve ring (33), the bottom end of the transmission shaft (9) is fixedly connected with an adapter (10), the adapter (10) is fixedly connected with the top end of the drill rod (53), and the bottom end of the drill rod (53) is fixedly connected with the drill bit (7).

6. The anti-kick tool with a bypass channel according to claim 1, wherein: One side of the inner cavity of the through pipe (1) is fixedly connected with a fixed sleeve (11), a plurality of sliding grooves (12) are formed in the inner wall of the fixed sleeve (11), and the positions of the sliding rings (54) correspond to the positions of the sliding grooves (12) and are movably connected.

7. The anti-stuck tool apparatus with a mud bypass passage according to claim 5, wherein: Four first channels (14) are formed around the surface of the adapter (10), a second channel (15) is formed in the inner cavity of the adapter (10), and the bypass channel (13) is connected in communication with the inner cavities of the first channels (14) and the second channel (15).

8. The anti-kick tool with a bypass channel according to claim 1, wherein: Sealing rings (55) are sleeved around the upper and lower ends of the drill rod (53), the sealing rings (55) are fixedly connected to the inner wall of the through pipe (1), a third channel (56) is formed in the inner cavity of the drill rod (53), and the third channel (56) is connected in communication with the inner cavity of the second channel (15).

9. The anti-kick-in tool structure with a mud bypass channel according to claim 8, characterized in that: The surface of the drill bit (7) is provided with four jet grooves (16), and a nozzle (17) is arranged in the middle of the inner cavity of the drill bit (7), the jet grooves (16) correspond to the positions of the second bypass holes (52), and the nozzle (17) is connected and communicated with the inner cavity of the third channel (56).

Citation Information

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