Sealed single-acting assembly for single-acting double-tube coring drill

Abstract

The utility model provides a sealed single-acting assembly for a single-acting double-tube coring drill. The sealed single-acting assembly comprises an upper joint welding part, a bearing seat and a first outer tube, the threaded retainer ring is arranged at the bottom of an inner cavity of the bearing seat, a first bearing retainer ring is mounted on the end face of the threaded retainer ring, a rotary Glyd ring is arranged in the first bearing retainer ring, an O-shaped ring is arranged on the outer wall of the first bearing retainer ring, a thrust roller bearing is arranged at the end of the first bearing retainer ring, and a shaft sleeve is arranged on the end face of the thrust roller bearing. A deep groove ball bearing is arranged on the end face of the shaft sleeve, and a second bearing check ring is arranged on the end face of the deep groove ball bearing. According to the sealed single-acting assembly for the single-acting double-pipe coring drilling tool, action parts in the single-acting assembly are isolated from drilling media in the working process of the drilling tool, corrosion of the drilling media to the single-acting parts is effectively prevented, and the service life of the single-acting assembly of the single-acting double-pipe coring drilling tool is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of coring tools, and in particular to a sealed single-action assembly for a single-action double-tube coring tool. Background Technology

[0002] Geological exploration, based on basic orientation, involves core drilling as an indispensable process in determining the target trajectory. Various methods, such as single-tube coring, single-action double-tube coring, and wireline coring, are used to perform coring operations. However, the reliability of the tools is a crucial factor in determining the quality and speed of the operation.

[0003] The existing single-action double-tube coring drill bit has an exposed single-action assembly, where the drilling medium passes directly through metal parts such as thrust bearings and deep groove ball bearings. During a certain drilling operation cycle, corrosion and contamination of the single-action assembly can occur inside, leading to a reduction in the lifespan of the single-action assembly's operating mechanism and a decrease or even loss of the drill bit's single-action capability.

[0004] Therefore, it is necessary to provide a sealed single-action assembly for single-action dual-tube coring drills to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a sealed single-action assembly for single-action double-tube coring drill bits, which solves the problem that the single-action assembly of existing single-action double-tube coring drill bits is exposed, and the drilling medium directly passes through metal parts such as thrust bearings and deep groove ball bearings. During a certain drilling operation cycle, corrosion and impurity contamination will occur inside the single-action assembly, which will reduce the life of the single-action assembly's action mechanism and cause the drill bit's single-action capability to decrease or even be lost.

[0006] To solve the above-mentioned technical problems, this utility model provides a sealed single-action assembly for a single-action double-tube coring drill bit, comprising: an upper joint welded, a bearing seat, and a first outer tube;

[0007] A threaded retaining ring is disposed at the bottom of the inner cavity of the bearing housing. A first bearing retaining ring is installed on the end face of the threaded retaining ring. A rotating Glyd ring is disposed inside the first bearing retaining ring. An O-ring is disposed on the outer wall of the first bearing retaining ring. A thrust roller bearing is disposed at the end of the first bearing retaining ring. A bushing is disposed on the end face of the thrust roller bearing. A deep groove ball bearing is disposed on the end face of the bushing. A second bearing retaining ring is disposed on the end face of the deep groove ball bearing.

[0008] The self-resetting steel ball is disposed inside the second bearing retaining ring, and the bearing housing is provided with a main shaft, and the second bearing retaining ring is disposed inside the main shaft;

[0009] Countersunk screws are provided on the outer surface of the bearing housing. An adjusting nut is provided at the bottom of the bearing housing. A hexagonal flathead screw is provided at the bottom of the inner tube connector. An inner tube connector is provided at the bottom of the spindle. A pressure relief spring is provided at the top of the inner cavity of the inner tube connector. A pressure relief steel ball is provided inside the pressure relief spring.

[0010] An inner tube is provided at the bottom of the upper connector of the inner tube, and a retaining spring is provided at the bottom of the inner tube, and a retaining spring seat is provided outside the retaining spring;

[0011] A straightening ring is disposed inside the first outer tube.

[0012] Preferably, the bearing housing and the first outer tube have the same diameter.

[0013] Compared with related technologies, the sealed single-action assembly for a single-action double-tube coring drill provided by this utility model has the following advantages:

[0014] This utility model provides a sealed single-action assembly for a single-action double-tube coring drill bit. By isolating the moving parts in the single-action assembly from the drilling medium during the operation of the drill bit, it effectively prevents the drilling medium from corroding the single-action parts and improves the service life of the single-action assembly of the single-action double-tube coring drill bit. Attached Figure Description

[0015] Figure 1 An exploded view of a sealed single-action assembly for a single-action double-tube coring drill bit provided by this utility model;

[0016] The following are the labeling elements in the diagram: 1. Upper connector welding; 2. Threaded retaining ring; 3. First bearing retaining ring; 4. Bushing; 5. Self-resetting steel ball; 6. Spindle; 7. Bearing housing; 8. Pressure relief spring; 9. Pressure relief steel ball; 10. Inner tube upper connector; 11. Inner tube; 12. Snap ring; 13. Snap ring seat; 14. First outer tube; 15. Centralizing ring; 16. Rotating Glyd ring; 17. O-ring; 18. Thrust roller bearing; 19. Deep groove ball bearing; 20. Second bearing retaining ring; 21. Countersunk screw; 22. Adjusting nut; 23. Socket head cap screw; 24. Second outer tube; 25. Drill bit. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Please refer to the following: Figure 1 ,in, Figure 1 An exploded view of a sealed single-action assembly for a single-action double-tube coring drill bit provided by this utility model.

[0019] A sealed single-action assembly for a single-action double-tube coring drill bit includes: an upper joint weld 1, a bearing housing 7, and a first outer tube 14; a threaded retaining ring 2, which is disposed at the bottom of the inner cavity of the bearing housing 7, and a first bearing retaining ring 3 is mounted on the end face of the threaded retaining ring 2. A rotating Glyd ring 16 is disposed inside the first bearing retaining ring 3, and an O-ring 17 is disposed on the outer wall of the first bearing retaining ring 3. A thrust roller bearing 18 is disposed at the end of the rotating Glyd ring 16, a bushing 4 is disposed on the end face of the thrust roller bearing 18, a deep groove ball bearing 19 is disposed on the end face of the bushing 4, and a second bearing retaining ring 20 is disposed on the end face of the deep groove ball bearing 19; a self-resetting steel ball 5, which is disposed inside the second bearing retaining ring 20, and the bearing... The bearing seat 7 is equipped with a main shaft 6, and the second bearing retaining ring 20 is located inside the main shaft 6; a countersunk screw 21 is located on the outer surface of the bearing seat 7, an adjusting nut 22 is located at the bottom of the bearing seat 7, an internal hexagonal flat-head screw 23 is located at the bottom of the inner tube upper connector 10, an inner tube upper connector 10 is located at the bottom of the main shaft 6, a pressure relief spring 8 is located at the top of the inner cavity of the inner tube upper connector 10, and a pressure relief steel ball 9 is located inside the pressure relief spring 8; an inner tube 11 is located at the bottom of the inner tube upper connector 10, a retaining ring 12 is located at the bottom of the inner tube 11, and a retaining ring seat 13 is located outside the retaining ring 12; and a straightening ring 15 is located inside the first outer tube 14.

[0020] The bearing housing 7 and the first outer tube 14 have the same diameter.

[0021] The diameter of the upper joint weld 1 is 3mm larger than that of the bearing housing 7 and the first outer tube 14.

[0022] The functions of each component in this application are as follows:

[0023] Upper joint welding 1: Connection between the drill pipe and the first outer tube 14 of the core drilling tool.

[0024] Threaded retaining ring 2: The step of the threaded retaining ring 2 is used to limit the movement on the end face of the first bearing retaining ring 3. This step will apply pressure to the internal structure of the bearing housing 7, so that the internal structural parts are squeezed to the design position, thus preventing the internal structure from axially moving.

[0025] The first bearing retaining ring 3 can play a sealing role to prevent drilling fluid backflow, and the one installed at the bottom can also play a limiting role.

[0026] Bushing 4: Fills the gap between bearings without interfering with the normal operation of the bearings.

[0027] Self-resetting steel ball 5: After the core is taken to a certain extent, due to the increase in air pressure in the inner tube 11, the self-resetting steel ball 5 is pushed to the drain hole of the spindle 6, the water pump is pressurized, and the staff receives a warning signal. At the same time, the steel ball can prevent drilling fluid from entering the inner tube 11 and causing core loss.

[0028] Main spindle 6: Connects all individual motion assembly components and serves as the rotary main spindle 6.

[0029] Bearing housing 7: Connects the upper joint weld 1 to the first outer tube 14 of the drill string. Lubricating oil can be injected into it to seal its interior and protect the bearing and other components from being exposed to the harsh downhole environment.

[0030] Pressure relief spring 8: When the air pressure inside the inner tube 11 is large enough, the air pressure causes the small steel ball to compress the pressure relief spring 8, allowing the inner tube 11 to circulate with the outside air.

[0031] Pressure relief steel ball 9: Serves as the pressure-acting surface of the inner tube 11, allowing the spring to be compressed more effectively. Secondly, it ensures that the release pressure is greater than the pressure that drives the alarm steel ball.

[0032] Inner tube upper connector 10: connects the main shaft 6 and the inner tube 11, and includes components such as the pressure relief spring 8.

[0033] Inner tube 11: Stores the rock core and buffers the impact of external factors on the formation of the rock core.

[0034] Snap ring 12: When the drill is pulled up, the inner diameter is compressed and the core is clamped to ensure that the core is pulled off.

[0035] Snap ring seat 13: Snap ring 12 is installed inside. Because of the taper of its inner wall, it restricts the movement of snap ring 12 and compresses snap ring 12 when the drill is lifted, so as to break the rock core.

[0036] First outer tube 14: connects the single-acting assembly and the drill bit 25, and transmits torque.

[0037] The straightening ring 15: enables the inner tube 11 to be relatively stable, preventing it from tilting due to vibration and other factors, thereby protecting the core and improving the core recovery rate.

[0038] Rotary Glyd ring 16: During operation, it can effectively prevent liquid or gas from leaking from its sealing surface, ensuring that the sealed medium will not overflow or enter areas that should not be contaminated.

[0039] O-ring 17: O-ring 17 forms an effective seal by filling the gap between the connectors, preventing leakage of media (such as liquids or gases), and can also play a role in shock absorption and cushioning under certain conditions.

[0040] Thrust roller bearing 18: Bears axial loads, i.e., forces along the axial direction. It can effectively transmit and distribute axial forces, protecting other mechanical components from damage.

[0041] Deep groove ball bearing 19: Deep groove ball bearing 19 is mainly used to bear radial loads, that is, forces perpendicular to the axial direction. It can effectively transmit and disperse radial forces, protecting other mechanical components from damage.

[0042] Second bearing retaining ring 20: restricts the axial movement of the compression spring inside the main shaft 6.

[0043] Countersunk screw 21: After filling the bearing housing 7 with lubricating oil, it can seal the interior to prevent lubricating oil leakage.

[0044] Adjusting nut 22: Adjusts the relative position of the snap ring seat 13 and the drill bit 25 by adjusting its axial position on the spindle 6.

[0045] 23mm internal hex head screws: 8mm pressure relief spring.

[0046] Second outer tube 24: transmits torque and protects inner tube 11.

[0047] Drill bit 25: Cuts rock strata and forms core.

[0048] In single-action double-tube coring tools, the sealed single-action assembly and the single-action double tube are closely related, specifically in the following aspects:

[0049] 1. Structurally

[0050] Single-action double-tube: Consists of a first outer tube 14 and an inner tube 11. The first outer tube 14 is responsible for drilling, and the inner tube 11 is used to retrieve the rock core. The inner and outer tubes can move relative to each other to ensure that the rock core is not damaged during drilling.

[0051] Sealed single-acting assembly: Located at the top of the single-acting double pipe, it is a key component mainly used to control the relative movement of the inner and outer pipes and ensure the sealing between the inner and outer pipes, preventing drilling fluid from entering the single-acting assembly, improving the service life of the single-acting assembly, and thus improving the quality of the core samples.

[0052] 2. Functionally

[0053] Sealing performance: The sealed single-acting assembly ensures the seal between the inner and outer tubes through sealing rings and other sealing components, preventing drilling fluid or mud from entering the inner tube 11, thereby ensuring the purity and integrity of the core.

[0054] Single-action control: The sealed single-action assembly can control the relative movement of the inner and outer tubes, keeping the inner tube 11 stationary during drilling while the first outer tube 14 continues to rotate and drill. This reduces friction and damage to the core during drilling and improves the core recovery rate.

[0055] 3. Working principle

[0056] Core sampling process: During core sampling, the first outer tube 14 rotates and drills in, while the inner tube 11 remains stationary. When the first outer tube 14 has drilled to a certain depth, the drill is pulled up and the core is extracted.

[0057] Watertight design: The design of the sealed single-acting assembly also takes into account the sealing problem. Through multiple sealing structures, it ensures that it can maintain a good sealing effect under high pressure and high temperature environment, preventing drilling fluid or mud from entering the inner tube 11.

[0058] 4. Application effectiveness

[0059] Improved core quality: The excellent sealing performance and single-action control function of the sealed single-action assembly effectively improve the core quality, reduce core loss and contamination, and enhance the accuracy and reliability of geological exploration.

[0060] Extended service life: Good sealing performance can also reduce wear between the inner and outer tubes, extend the service life of the drill bit, and reduce maintenance costs.

[0061] This application discloses a sealed single-acting assembly for a single-acting double-tube coring drill bit. The first bearing retainer 3 is fitted with one O-ring 17 and one rotating grate ring 16. Two deep groove ball bearings 19 and one bushing 4 are fitted into the main shaft 6. A thrust roller bearing 18 is also fitted into the main shaft 6. The entire assembly is then installed into a bearing housing 7. On the unthreaded side of the main shaft 6, one thrust roller bearing 18 and one threaded retainer 2 are installed. A second elastic bearing retainer 20 is installed into the inner bore of the main shaft 6. Finally, the upper connector weld 1 is connected to the bearing housing via external threads. 7. Engage the internal thread and screw the adjusting nut 22 into the threaded end of the spindle 6. Install the internal hexagonal flat head screw 23, the pressure relief spring 8, and the pressure relief steel ball 9 into the upper connector 10 of the inner tube. The upper connector 10 of the inner tube is connected to the spindle 6 by thread in the direction without the internal tube thread. The upper connector 10 of the inner tube is connected to the inner tube 11. The inner tube 11 is connected to the snap ring seat 13. The snap ring 12 is installed in the snap ring seat 13. The internal thread of the first outer tube 14 is connected to the external thread of the bearing seat 7. The drill bit 25 is installed into the centering ring 15. Then, the internal thread of the drill bit 25 is connected to the external thread of the second outer tube 24.

[0062] During drilling, the upper joint weld 1, bearing seat 7, and first outer tube 14 transmit torque to the drill bit 25. During rotation, the inner tube 11 assembly moves independently due to the bearing, and remains relatively stationary with respect to the first outer tube 14 under the combined action of the core and the first outer tube 14. After core sampling is completed, the signal steel ball moves upward under pressure, and the drill is lifted to retrieve the core.

[0063] The working principle of the sealed single-action assembly for a single-action double-tube coring drill provided by this utility model is as follows:

[0064] During operation, the single-action assembly in the drill string ensures single-action while isolating the drilling medium, preventing it from entering the parts and causing irreversible corrosion, thus increasing the service life of the drill string. The built-in thrust roller bearing 18 can withstand more axial force than the thrust ball bearing. The sealing uses a Cherry seal structure to seal hydraulic oil, gas, and water. The built-in ordinary deep groove ball bearing 19 reduces the cost of parts replacement while maintaining the same lifespan. The single-action assembly housing has an oil injection hole, which can be used for oiling after assembly, increasing single-action performance while reducing water vapor entering the single-action assembly and extending its service life.

[0065] Compared with related technologies, the sealed single-action assembly for a single-action double-tube coring drill provided by this utility model has the following advantages:

[0066] This utility model provides a sealed single-action assembly for a single-action double-tube coring drill bit. By isolating the moving parts in the single-action assembly from the drilling medium during the operation of the drill bit, it effectively prevents the drilling medium from corroding the single-action parts and improves the service life of the single-action assembly of the single-action double-tube coring drill bit.

[0067] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealed single-action assembly for a single-action double-tube coring drill bit, characterized in that, include: Upper joint welding, bearing housing and first outer tube; A threaded retaining ring is disposed at the bottom of the inner cavity of the bearing housing. A first bearing retaining ring is installed on the end face of the threaded retaining ring. A rotating Glyd ring is disposed inside the first bearing retaining ring. An O-ring is disposed on the outer wall of the first bearing retaining ring. A thrust roller bearing is disposed at the end of the first bearing retaining ring. A bushing is disposed on the end face of the thrust roller bearing. A deep groove ball bearing is disposed on the end face of the bushing. A second bearing retaining ring is disposed on the end face of the deep groove ball bearing. The self-resetting steel ball is disposed inside the second bearing, the bearing housing is provided with a main shaft, and the second bearing retaining ring is disposed inside the main shaft; A countersunk screw is provided on the outer surface of the bearing housing. An adjusting nut is provided at the bottom of the bearing housing. An inner tube upper connector is provided at the bottom of the spindle. An internal hexagonal flat-head screw is provided at the bottom of the inner tube upper connector. A pressure relief spring is provided at the top of the inner cavity of the inner tube upper connector. A pressure relief steel ball is provided inside the pressure relief spring. An inner tube is provided at the bottom of the upper connector of the inner tube, and a retaining spring is provided at the bottom of the inner tube, and a retaining spring seat is provided outside the retaining spring; A straightening ring is disposed inside the first outer tube.

2. A sealed single-action assembly for a single-action double-tube coring drill bit according to claim 1, characterized in that, The bearing housing and the first outer tube have the same diameter.

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