Drift diameter gauge for petroleum drill collar
By incorporating structural designs such as snap-fit blocks, snap-fit holes, and magnets, the problems of wear on the internal and external threads of the drilling collar gauge and dust ingress have been solved, enabling stable connection and smooth movement of the downhole tubing and improving the stability of the inspection process.
Patent Information
- Application Number
- CN202520160458.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-23
AI Technical Summary
The internal and external threads of existing oil drill collar gauges are prone to wear, which affects the vertical movement of the downhole tubing. Furthermore, dust can easily enter the internal and external threads, leading to increased resistance in the rotational connection between the connector and the downhole tubing.
The design incorporates snap-fit blocks, snap-fit holes, magnets, and rollers. It achieves a stable connection between the downhole tubing and the connector through snap-fit and magnetic attraction, avoiding the use of internal and external threaded connections. The magnets are used to fix the collar, ensuring stability during the testing process.
It effectively avoids wear on internal and external threads, ensures smooth vertical movement of the downhole tubing, reduces dust ingress, lowers rotational connection resistance, and improves detection stability.
Smart Images
Figure CN223634692U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of petroleum drill collar, concretely relates to a gauge for petroleum drill collar. BACKGROUND
[0002] The inner wall of the connecting head at the top of the existing gauge for petroleum drill collar is usually provided with internal threads, the outer lateral wall of the downhole string is provided with external threads at the bottom, the connecting head is connected with the downhole string through the internal and external threads, but the internal and external threads are worn to different degrees due to the fact that the inner hole size of the petroleum drill collar needs to be detected frequently, the axes of the downhole string and the connecting head are not on the same straight line after the downhole string is connected with the connecting head, thereby affecting the movement of the downhole string in the vertical direction after the gauge is put into the petroleum drill collar, meanwhile, dust is easy to enter the internal and external threads, the rotating connection resistance between the connecting head and the downhole string is increased, and the wear of the internal and external threads is further aggravated.
[0003] Therefore, the gauge for petroleum drill collar needs to be provided to solve the problems of the wear of the internal and external threads of the connecting head and the downhole string, the movement of the downhole string in the vertical direction, the dust entering the internal and external threads, the increase of the rotating connection resistance between the connecting head and the downhole string, and the further wear of the internal and external threads. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a gauge for petroleum drill collar to solve the problems in the background art.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a gauge for petroleum drill collar, comprising a gauge, a connecting head is fixed on the top surface of the gauge, a downhole string is movably clamped in the connecting head, an outer ring is arranged on the outer lateral wall of the downhole string close to the bottom position, a plurality of moving plates are arranged in the outer ring in a circumferential distribution, a plurality of second clamping holes are formed in the outer lateral wall of the downhole string at the bottom in a circumferential distribution, a plurality of first clamping holes are formed in the outer lateral wall of the connecting head at the top in a circumferential distribution, three clamping blocks are fixed on the side face of the connecting head close to the moving plates, and the clamping blocks are clamped in the first clamping holes and the second clamping holes correspondingly.
[0006] It is worth mentioning in the scheme that an installation ring is fixed on the outer lateral wall of the downhole string close to the bottom position, and a plurality of first magnets are fixed on the bottom surface of the installation ring in a circumferential distribution.
[0007] It is further worth mentioning that a sleeve ring is movably connected to the outer lateral wall of the downhole string close to the bottom position, a second magnet is fixed on the top surface of the sleeve ring at the position opposite to the first magnet, the first magnet and the second magnet are arranged in different natures, and a rolling shaft is movably connected to each of the four ends of the sleeve ring.
[0008] Further need explanation is, the mobile plate is away from the connecting head side near the top position fixed with four positioning column, four the positioning column passes through the outer ring, four the positioning column one end fixed with connecting plate, the positioning column periphery is provided with spring.
[0009] As a preferred embodiment, the lower well pipe column outer side wall bottom is fixed with several circumferentially distributed clamping strips, the connecting head inner side wall top is provided with several circumferentially distributed clamping grooves, and the clamping strip is clamped in the corresponding clamping groove.
[0010] As a preferred embodiment, the outer ring bottom surface is fixed with four circumferentially distributed connecting strips, and one end of the four connecting strips is fixed with the lower well pipe column outer side wall bottom.
[0011] Compared with the prior art, the utility model provides a gauge for the petroleum drill collar, at least has following beneficial effect:
[0012] (1) through the setting of the sleeve ring and the roller, four mobile plates can be expanded outward synchronously, thereby facilitating the insertion of the downhole pipe into the connecting head, so that the clamping block does not cause obstruction when the downhole pipe is inserted into the connecting head, and through the setting of the spring, the clamping block can be stably clamped with the first clamping hole and the second clamping hole, thereby facilitating the stable clamping of the downhole pipe and the connecting head, through the setting of the clamping strip and the clamping groove, the downhole pipe is clamped in the connecting head, and the downhole pipe does not rotate, facilitating the corresponding of the first clamping hole and the second clamping hole, through the setting of the clamping block, the first clamping hole and the second clamping hole, so that the downhole pipe and the connecting head can be conveniently connected, avoiding the use of the internal and external thread connection mode, causing the internal and external thread wear, affecting the movement of the downhole pipe in the vertical direction, and the dust entering the internal and external thread, causing the rotating connection resistance between the connecting head and the downhole pipe to increase, further aggravating the wear of the internal and external thread.
[0013] (2) through the setting of the first magnet and the second magnet, the sleeve ring can be connected with the mounting ring, so that the sleeve ring does not fall off when the gauge detects the size of the inner hole of the petroleum drill collar, thereby avoiding the removal of the clamping block from the first clamping hole and the second clamping hole during the detection process, and ensuring the stable connection between the downhole pipe and the connecting head during the detection process. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is the overall structure schematic diagram of the utility model;
[0015] Figure 2 It is the outer ring structure schematic diagram of the utility model;
[0016] Figure 3 It is the connecting head structure schematic diagram of the utility model;
[0017] Figure 4 It is the second clamping hole structure schematic view of the utility model;
[0018] Figure 5 It is the mobile plate structure schematic view of the utility model.
[0019] In the figure:
[0020] 100, gauge; 101, connecting head; 102, downhole string;
[0021] 200, outer ring; 201, positioning column; 202, spring; 203, connecting plate; 204, mobile plate; 205, clamping block; 206, first clamping hole; 207, second clamping hole; 208, connecting strip;
[0022] 300, mounting ring; 301, first magnet; 302, sleeve ring; 303, second magnet; 304, roller;
[0023] 400, clamping strip; 401, clamping groove. DETAILED DESCRIPTION
[0024] Please refer to Figures 1-5 The utility model provides a gauge for petroleum drill collar, including gauge 100, the top surface fixed with connecting head 101 of gauge 100, the inside activity clamping of connecting head 101 has downhole string 102, the outer lateral wall of downhole string 102 is close to the bottom position and is provided with outer ring 200, the inside of outer ring 200 is provided with a plurality of mobile plate 204 that is circumferentially distributed, the bottom of outer lateral wall of downhole string 102 is provided with a plurality of second clamping hole 207 that is circumferentially distributed, the top position of outer lateral wall of connecting head 101 is provided with a plurality of first clamping hole 206 that is circumferentially distributed, mobile plate 204 is close to the side fixed with three clamping blocks 205 of connecting head 101, clamping block 205 corresponds and clamps in first clamping hole 206 and second clamping hole 207.
[0025] Further as Figure 2 The bottom surface of mounting ring 300 is fixed with a plurality of first magnets 301 that are circumferentially distributed.
[0026] Through the installation ring 300 set, the first magnet 301 can be fixed, through the first magnet 301 set, the first magnet 301 can be mutually attracted with the second magnet 303, and then the position of the sleeve ring 302 is fixed.
[0027] Further as Figure 2As shown, a collar 302 is movably connected to the outer wall of the downhole tubing 102 near the bottom. A second magnet 303 is fixed to the top surface of the collar 302 at a position opposite to the first magnet 301. The first magnet 301 and the second magnet 303 are of opposite polarity. Rollers 304 are movably connected to the four ends of the collar 302.
[0028] By using the collar 302 and roller 304, when the collar 302 moves down, the roller 304 can contact the top of the side of the moving plate 204 near the connector 101, thereby pushing the moving plate 204 to move outward, thus providing space for the downhole tubing 102 to engage in the connector 101.
[0029] Further as Figure 2 As shown, four positioning posts 201 are fixed on the side of the movable plate 204 away from the connector 101 near the top. The four positioning posts 201 move through the outer ring 200. A connecting plate 203 is fixed to one end of each positioning post 201. A spring 202 is provided around the positioning post 201.
[0030] The positioning post 201 allows the movable plate 204 to be movably connected to the outer ring 200. The spring 202 allows the movable plate 204 to be pushed by the spring 202, thereby causing the snap-fit block 205 to engage in the first snap-fit hole 206 and the second snap-fit hole 207, so that the connector 101 can be connected to the downhole tubing 102.
[0031] Further as Figure 2 As shown, a number of circumferentially distributed locking strips 400 are fixed to the bottom of the outer side wall of the downhole tubing 102, and a number of circumferentially distributed locking grooves 401 are opened on the top of the inner side wall of the connector 101, and the locking strips 400 are engaged in the corresponding locking grooves 401.
[0032] The locking strip 400 and locking groove 401 ensure that the downhole tubing 102 will not rotate when it is locked in the connector 101.
[0033] Further as Figure 2 As shown, four connecting strips 208 arranged in a circular pattern are fixed on the bottom surface of the outer ring 200, and one end of each of the four connecting strips 208 is fixed to the bottom of the outer wall of the downhole tubing 102.
[0034] The connecting strip 208 allows the outer ring 200 to be fixed to the outer wall of the downhole tubing 102.
[0035] In summary: when connecting the downhole string 102 and the connector 101, first push the sleeve 302 linearly, the movement of the sleeve 302 makes the first magnet 301 and the second magnet 303 separate, when the sleeve 302 moves, the four rollers 304 respectively contact the top of the side of the downhole string 102 near the corresponding moving plate 204, and push the four moving plates 204 to expand outward synchronously, at this time the spring 202 is compressed, until the rollers 304 contact the vertical surface of the moving plate 204, keep the position of the sleeve 302, then clamp the downhole string 102 in the connector 101, at this time the clamping strip 400 is clamped in the clamping groove 401, adjust the position of the downhole string 102 in the connector 101, so that the first clamping hole 206 and the second clamping hole 207 correspond, then move the sleeve 302 upward, until the first magnet 301 and the second magnet 303 attract, at this time the position of the sleeve 302 is fixed by the first magnet 301 and the second magnet 303, in this process, the compressed spring 202 pushes the moving plate 204 to move, so that the clamping block 205 is clamped in the corresponding first clamping hole 206 and second clamping hole 207, so that the downhole string 102 and the connector 101 are connected, then the gauge 100 can be used to detect the size of the inner hole of the petroleum drill collar.
[0036] When separating the downhole string 102 and the connector 101, pull the sleeve 302 downward, so that the first magnet 301 and the second magnet 303 separate, then pull the sleeve 302 linearly, the four rollers 304 respectively contact the top of the side of the downhole string 102 near the corresponding moving plate 204, and push the four moving plates 204 to expand outward synchronously, at this time the spring 202 is compressed, until the rollers 304 contact the vertical surface of the moving plate 204, at this time the clamping block 205 moves out of the first clamping hole 206 and the second clamping hole 207, then pull the gauge 100, so that the connector 101 and the downhole string 102 are separated.
[0037] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A gauge for oil drilling collars, comprising a gauge (100) for the gauge of the diameter, characterized in that, The top surface of the gauge (100) is fixed with a connecting head (101), the connecting head (101) is movably clamped with a downhole string (102), the outer side wall of the downhole string (102) is provided with an outer ring (200) near the bottom position, the outer ring (200) is provided with a plurality of circumferentially distributed moving plates (204), the bottom of the outer side wall of the downhole string (102) is provided with a plurality of circumferentially distributed second clamping holes (207), the top of the outer side wall of the connecting head (101) is provided with a plurality of circumferentially distributed first clamping holes (206), the moving plate (204) is fixed with three clamping blocks (205) near the side of the connecting head (101), and the clamping blocks (205) are correspondingly clamped in the first clamping holes (206) and the second clamping holes (207).
2. The gauge according to claim 1, wherein: The outer side wall of the downhole string (102) is fixed with a mounting ring (300) near the bottom position, and the bottom surface of the mounting ring (300) is fixed with a plurality of circumferentially distributed first magnets (301).
3. The gauge according to claim 2, wherein: The outer side wall of the downhole string (102) is movably connected with a sleeve ring (302) near the bottom position, the top surface of the sleeve ring (302) is fixed with a second magnet (303) at a position opposite to the first magnet (301), the first magnet (301) and the second magnet (303) are oppositely arranged, and the sleeve ring (302) is movably connected with a roller (304) at four ends.
4. The gauge according to claim 1, wherein: The moving plate (204) is fixed with four positioning columns (201) near the top position on the side away from the connecting head (101), the four positioning columns (201) movably pass through the outer ring (200), one end of the four positioning columns (201) is fixed with a connecting plate (203), and the positioning columns (201) are provided with springs (202) around.
5. The gauge according to claim 1, wherein: The bottom of the outer side wall of the downhole string (102) is fixed with a plurality of circumferentially distributed clamping strips (400), and the top of the inner side wall of the connecting head (101) is provided with a plurality of circumferentially distributed clamping grooves (401), and the clamping strips (400) are clamped in the corresponding clamping grooves (401).
6. The gauge according to claim 1, wherein: The bottom surface of the outer ring (200) is fixed with four circumferentially distributed connecting strips (208), and one end of the four connecting strips (208) is fixed with the bottom of the outer side wall of the downhole string (102).