Self-counting drill rod inner wall mud scraping device

Abstract

The invention discloses a self-counting drill rod inner wall mud scraping device which comprises a fixing cylinder, a fishing assembly and a counterweight assembly, the fishing assembly and the counterweight assembly are arranged at the upper end and the lower end of the fixing cylinder respectively, and a stroke assembly and an anchoring assembly are further installed on the fixing cylinder; the fishing assembly comprises a fishing barrel, and a mud scraping assembly is arranged on the outer wall of the fishing barrel. The mud scraping device can clean mud on the inner wall of the drill rod, can clearly count the advancing distance of the mud scraping device, and can be fixed in the drill rod according to needs to facilitate next mud scraping or fishing.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas drilling engineering, in particular to a self-counting drill rod inner wall mud scraping device. Background Art

[0002] During the drilling process of oil and gas wells, various working conditions such as changing drill tools, short drilling, and well cleaning involve drilling operations. In order to keep the drilling operation safe and the drill floor clean, it is usually necessary to scrape the mud from the drill pipe during the drilling process. At present, scraping the mud from the outer wall of the drill pipe has been achieved. However, due to the lack of technology for scraping the mud from the inner wall of the drill pipe, mud is still all over the drill floor during the drilling process.

[0003] A variety of drill pipe scrapers have been invented at home and abroad, mainly including drill pipe outer wall scrapers and drill pipe inner wall scrapers. The drill pipe inner wall scrapers are mainly passive scrapers, which are placed directly into the drill pipe and slide down by the inertia of the scraper's own weight to scrape the mud on the inner wall of the drill pipe. For example, the staggered inverted groove drill pipe inner wall scraper with patent number ZL201610834534.3 can make the drilling fluid more easily converge into a stream and flow downward, and it is easier to pass through the drill pipe joint without getting stuck.

[0004] However, the existing drill rod inner wall scraper cannot penetrate into the lower drill rod to actively scrape the mud, and the construction personnel cannot clearly know the position of the scraper in the drill rod and the number of drill rods after the scraping. Summary of the invention

[0005] The purpose of the present invention is to provide a self-counting drill pipe inner wall scraper, which can clean the mud on the inner wall of the drill pipe and can clearly count the distance traveled by the scraper. At the same time, it can be fixed in the drill pipe as needed to facilitate the next scraping or salvaging.

[0006] The embodiment of the present invention is achieved as follows:

[0007] The present invention provides a self-counting drill pipe inner wall scraping device, comprising a fixed cylinder and a salvage assembly and a counterweight assembly respectively arranged at the upper and lower ends of the fixed cylinder, wherein a travel assembly and an anchor assembly are also installed on the fixed cylinder; the travel assembly comprises two supporting frames arranged opposite to each other, the two supporting frames are arranged in a V shape, the two supporting frames are rotatably connected to the fixed cylinder at the bottom of the V-shaped valley through bearings, and travel wheels are rotatably arranged at the far ends of the two supporting frames, a permanent magnet is installed at one place on the outer edge of the travel wheel, a Hall sensor adapted to the permanent magnet is arranged in the middle of the supporting frame, and the induction of the permanent magnet by the Hall sensor is used to count the rotation of the travel wheel, and a travel wheel is arranged between the middle parts of the two supporting frames. a reset spring; the anchoring assembly comprises two magnetic slips arranged opposite to each other, a compression spring is arranged between the two magnetic slips, an electromagnet is also arranged between the two magnetic slips, and the electromagnet is electrically connected to a battery and a control circuit; the salvage assembly comprises a salvage barrel, the lower part of which is fixedly connected to the top of a fixed barrel by a thread, a salvage cone slidably connected to the top of the salvage barrel, a limiting boss is arranged at the lower part of the salvage cone, a limiting spring is arranged between the limiting boss and the top of the salvage barrel, a draw hook is connected to the bottom of the salvage cone, a micro switch is arranged in the draw hook, the micro switch is electrically connected to the battery and the electromagnet, and a mud scraping assembly is arranged on the outer wall of the salvage barrel.

[0008] Furthermore, a travel limit groove is provided on the fixed cylinder, and there are two travel limit grooves which are symmetrically arranged. The travel wheel is a rubber wheel, and anti-slip teeth are arranged on the outer edge of the travel wheel.

[0009] Furthermore, fixing columns are provided on opposite sides of the two support frames, and both ends of the return spring are respectively fixed on the fixing columns.

[0010] Furthermore, a compression counter is provided on the return spring, and the counter is used to record the number of times the return spring is compressed.

[0011] Furthermore, a symmetrical slip extension hole is formed on the side wall of the fixing cylinder, and the magnetic slip is slidably arranged in the slip extension hole through a cover plate.

[0012] Furthermore, the outer surface of the magnetic slip is provided with an anti-slip groove.

[0013] Furthermore, the battery and the control circuit are installed in the fixed cylinder, and a sealing plug is provided between the stroke assembly and the anchor assembly in the fixed cylinder.

[0014] Furthermore, the scraper assembly includes a scraper rubber, which is sleeved on the outer wall of the overshot tube and has multiple layers.

[0015] Furthermore, a straightening rubber may be provided on the outer wall of the fixing tube.

[0016] Furthermore, the counterweight assembly includes a guide shoe fixedly connected to the lower end of the fixing tube, a counterweight block is sleeved on the guide shoe, and the counterweight block is fixed to the guide shoe by fastening bolts.

[0017] The beneficial effects of the self-counting drill rod inner wall scraping device provided by the present invention include:

[0018] 1. The scraper device of the present invention can be directly placed in the drill pipe, and the scraper can be used to scrape the mud while the drill pipe is being pulled out. The scraper has a good effect, which can prevent mud from dripping on the drilling table, reduce the risk of slipping of drilling workers, reduce the labor intensity of cleaning, improve the efficiency of drilling operations, and effectively shorten the drilling cycle.

[0019] 2. The present invention provides a travel assembly and an anchor assembly in the fixed cylinder of the scraper device, so that the scraper can be fixed inside the drill rod as needed, and the travel distance in the drill rod can be known without causing the scraper to fall;

[0020] 3. The V-shaped support frame in the stroke assembly extends two symmetrical stroke wheels into the fixed tube and contacts the inner wall of the drill rod. When the scraper slides down, the friction force causes the stroke wheel to rotate. The Hall sensor senses the permanent magnet to count the number of rotations of the stroke wheel to obtain the distance the scraper travels in the drill rod. A counter is installed on the reset spring. When the stroke wheel passes through the narrow part of the drill rod connection, it will shrink. The reset spring will be compressed and then reset. The counter can record the number of times the reset spring is compressed to know how many drill rods the scraper has passed.

[0021] 4. The electromagnet of the anchoring assembly is magnetic when energized, causing the magnetic slips to contract. When the power is off, the magnetism disappears. Pushed by the compression spring, the two magnetic slips extend out of the fixing tube and engage with the inner wall of the drill pipe, fixing the mud scraper on the inner wall of the drill pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural front view of the present invention;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0025] Figure 3 for Figure 2 A is a partial enlarged schematic diagram;

[0026] Figure 4 It is a structural schematic diagram of the stroke component in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the anchoring assembly in the present invention;

[0028] Icons: 1. Fixed cylinder; 11. Travel limit groove; 12. Slip extension hole; 2. Travel assembly; 21. Support frame; 22. Bearing; 23. Travel wheel; 24. Permanent magnet; 25. Hall sensor; 26. Reset spring; 27. Counter; 3. Anchor assembly; 31. Magnetic slip; 32. Compression spring; 33. Electromagnet; 34. Cover plate; 4. Salvage assembly; 41. Salvage tube; 42. Salvage cone; 43. Limit boss; 44. Limit spring; 45. Pull hook; 46. Micro switch; 47. Mud scraper rubber; 5. Counterweight assembly; 51. Guide shoe; 52. Counterweight block; 53. Fastening bolt. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1: Figure 1-5 As shown, the present invention provides a self-counting drill pipe inner wall scraping device, including a fixed cylinder 1 and a salvage assembly 4 and a counterweight assembly 5 respectively arranged at the upper and lower ends of the fixed cylinder, and a travel assembly 2 and an anchor assembly 3 are also installed on the fixed cylinder 1; the travel assembly 2 includes two support frames 21 arranged opposite to each other, the two support frames 21 are arranged in a V shape, and the two support frames 21 are rotatably connected to the fixed cylinder 1 through bearings 22 at the bottom of the V shape, and the two support frames 21 are rotatably arranged at the ends far from the bearings 22 of the two support frames 21, and a permanent magnet 24 is installed at one place on the outer edge of the travel wheel 23, and a Hall sensor 25 adapted to the permanent magnet 24 is arranged in the middle of the support frame 21, and the induction of the permanent magnet 24 by the Hall sensor 25 is used to count the rotation of the travel wheel 23, and a reset is arranged between the middles of the two support frames 21 Spring 26; the anchoring assembly 3 includes two magnetic slips 31 arranged opposite to each other, a compression spring 32 is arranged between the two magnetic slips 31, and an electromagnet 33 is also arranged between the two magnetic slips 31, and the electromagnet 33 is electrically connected to a battery and a control circuit; the salvage assembly 4 includes a salvage tube 41, the lower part of the salvage tube 41 is fixedly connected to the top of the fixed tube 1 by a thread, a salvage cone 42 is slidably connected to the top of the salvage tube 41, a limiting boss 43 is arranged at the lower part of the salvage cone 42, a limiting spring 44 is arranged between the limiting boss 43 and the top of the salvage tube 41, a hook 45 is connected to the bottom of the salvage cone 42, a micro switch 46 is arranged in the hook 45, the micro switch 46 is electrically connected to the battery and the electromagnet 33, and a mud scraping assembly is arranged on the outer wall of the salvage tube 41.

[0035] The scraper device of the present invention can be directly placed into the drill pipe, and the scraper process can be performed while the drill pipe is being pulled out. The scraper has a good scraping effect, and the mud can be prevented from dripping onto the drilling table. The risk of slipping of drilling workers is reduced, the labor intensity of cleaning is reduced, the efficiency of pulling out the drill is improved, and the drilling cycle is effectively shortened. The present invention sets a stroke component 2 and an anchor component 3 in the fixed tube 1 of the scraper device, and the scraper can be fixed inside the drill pipe as needed. At the same time, the stroke distance in the drill pipe can be known without causing the scraper to fall. The electromagnet 33 of the anchor component 3 is magnetic when energized, causing the magnetic slip 31 to shrink, and the magnetism disappears when the power is off. The two magnetic slips 31 are pushed by the compression spring 32 to extend out of the fixed tube 1 and engage with the inner wall of the drill pipe, so that the scraper is fixed on the inner wall of the drill pipe.

[0036] The design of the salvage assembly 4 allows the scraper device of the present invention to brake when an unexpected power outage causes the scraper device to brake. The scraper cone 42 only needs to be lifted by an external rope. The salvage cone 42 drives the hook 45 to rise, thereby triggering the microswitch 46, energizing the electromagnet 33, and the slips can retract, releasing the brake and salvaging the scraper device.

[0037] The V-shaped support frame 21 in the stroke assembly 2 extends two symmetrical stroke wheels 23 into the fixed tube 1 and contacts the inner wall of the drill rod. When the scraper slides down, the friction force causes the stroke wheel 23 to rotate. The number of rotations of the stroke wheel 23 is counted by the Hall sensor 25 sensing the permanent magnet 24 to obtain the distance traveled by the scraper in the drill rod. A counter 27 is installed on the reset spring 26. When the stroke wheel 23 passes through the narrow part of the drill rod connection, it will shrink, and the reset spring 26 will be compressed and then reset. The counter 27 can know how many drill rods the scraper has passed by by recording the number of times the reset spring 26 is compressed.

[0038] It should be noted that the fixed cylinder 1 is provided with a travel limit groove 11, and the travel limit grooves 11 are two and symmetrically arranged. One end of the support frame 21 is located in the travel limit groove 11, driving the travel wheel 23 to extend out of the travel limit groove 11. The travel wheel 23 is a rubber wheel, and the outer edge of the travel wheel 23 is provided with anti-skid teeth. The design of the rubber wheel and the anti-skid teeth is conducive to increasing the friction between the travel wheel 23 and the inner wall of the drill rod, so that the travel wheel 23 can contact the inner wall of the drill rod more stably, thereby ensuring the accuracy of the measurement.

[0039] Fixed columns are arranged on opposite sides of the two support frames 21 , and both ends of the reset spring 26 are respectively fixed on the fixed columns. The reset spring 26 is arc-shaped and can support the two support frames 21 to reset.

[0040] Embodiment 2: Figure 4As shown, on the basis of the first embodiment, a compression counter 27 is provided on the reset spring 26, and the counter 27 is used to record the number of times the reset spring 26 is compressed. The counter 27 is installed on the reset spring 26, and when the travel wheel 23 passes through the narrow part of the drill rod connection, it will shrink, and the reset spring 26 will be compressed and reset. The counter 27 can know how many drill rods the scraper has passed by recording the number of times the reset spring 26 is compressed. Since the length of each drill rod is the same, the data of the counter 27 and the data of the travel wheel 23 can be mutually verified.

[0041] Embodiment 3: Figure 2 , 5 As shown, on the basis of the first or second embodiment, the side wall of the fixed cylinder 1 is provided with a symmetrical slip extension hole 12, and the magnetic slip 31 is slidably arranged in the slip extension hole 12 through the cover plate 34. The outer surface of the magnetic slip 31 is provided with an anti-skid groove. The battery and the control circuit are installed in the fixed cylinder 1. The control circuit can control the connection and disconnection of the battery and the electromagnet 33 as needed, so that the battery extends out of the fixed cylinder 1 and is fixed on the drill pipe, and can also release the fixation. The control circuit can also be connected to the counter 27 and the Hall sensor 25 for communication, obtain the data detected by them, and then send it to the ground staff.

[0042] It should be noted that a sealing plug is provided between the stroke assembly 2 and the anchor assembly 3 in the fixing cylinder 1 to prevent mud from entering the anchor assembly 3 from the stroke assembly 2 and damaging the battery and control circuit in the anchor assembly 3 .

[0043] Embodiment 4: Figure 1-3 As shown, the scraper assembly includes a scraper rubber 47, which is sleeved on the outer wall of the overshot tube 41, and the scraper rubber 47 has multiple layers. A straightening rubber can also be provided on the outer wall of the fixed tube 1. The counterweight assembly 5 includes a guide shoe 51 fixedly connected to the lower end of the fixed tube 1, and a counterweight block 52 is sleeved on the guide shoe 51, and the counterweight block 52 is fixed to the guide shoe 51 by a fastening bolt 53.

[0044] The scraper rubber 47 can be a whole circle of rubber sleeved on the outer wall of the overshot tube 41, or it can be a plurality of separate fan-shaped rubbers. The whole circle of rubber can increase the opening, which is beneficial to reduce the scraper resistance and improve the scraper efficiency. The straightening rubber can effectively prevent the scraper device from deviating, avoiding shaking during the scraper process, causing an unstable center of gravity, and affecting the scraper effect.

[0045] The scraper device of the present invention can clean the mud on the inner wall of the drill pipe and can clearly count the distance traveled by the scraper device. At the same time, it can be fixed in the drill pipe as needed to facilitate the next scraping or salvaging. In the case of abnormal braking, the fixation can be released during salvaging, which will not cause fish to fall and is convenient for salvaging.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-counting drill pipe inner wall scraping device, characterized in that: It comprises a fixed cylinder (1) and a salvaging assembly (4) and a counterweight assembly (5) respectively arranged at the upper and lower ends of the fixed cylinder, and a travel assembly (2) and an anchor assembly (3) are also installed on the fixed cylinder (1); The stroke assembly (2) comprises two support frames (21) arranged opposite to each other, the two support frames (21) are arranged in a V-shape, the two support frames (21) are rotatably connected to the fixed cylinder (1) at the bottom of the V-shape via a bearing (22), a stroke wheel (23) is rotatably arranged at the end of the two support frames (21) far from the bearing (22), a permanent magnet (24) is installed at one point on the outer edge of the stroke wheel (23), a Hall sensor (25) adapted to the permanent magnet (24) is arranged in the middle of the support frame (21), the Hall sensor (25) senses the permanent magnet (24) to count the rotation of the stroke wheel (23), and a reset spring (26) is arranged between the middle of the two support frames (21); The anchoring assembly (3) comprises two magnetic slips (31) arranged opposite to each other, a compression spring (32) is arranged between the two magnetic slips (31), an electromagnet (33) is also arranged between the two magnetic slips (31), and the electromagnet (33) is electrically connected to a battery and a control circuit; The salvage assembly (4) comprises a salvage tube (41), the lower portion of which is fixedly connected to the top of a fixed tube (1) via a thread, a salvage cone (42) slidably connected to the top of the salvage tube (41), a limit boss (43) being arranged at the lower portion of the salvage cone (42), a limit spring (44) being arranged between the limit boss (43) and the top of the salvage tube (41), a draw hook (45) being connected to the bottom of the salvage cone (42), a micro switch (46) being arranged inside the draw hook (45), the micro switch (46) being electrically connected to a battery and an electromagnet (33), and a mud scraping assembly being arranged on the outer wall of the salvage tube (41).

2. The self-counting drill rod inner wall scraping device according to claim 1 is characterized in that: The fixed cylinder (1) is provided with a travel limit groove (11), the travel limit grooves (11) are two and are symmetrically arranged, the travel wheel (23) is a rubber wheel, and the outer edge of the travel wheel (23) is provided with anti-slip teeth.

3. The self-counting drill rod inner wall scraping device according to claim 1 is characterized in that: Fixed columns are arranged on opposite sides of the two support frames (21), and both ends of the return spring (26) are respectively fixed on the fixed columns.

4. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The return spring (26) is provided with a compression counter (27), and the counter (27) is used to record the number of times the return spring (26) is compressed.

5. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The side wall of the fixed cylinder (1) is provided with symmetrical slip extension holes (12), and the magnetic slip (31) is slidably arranged in the slip extension hole (12) through a cover plate (34).

6. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The outer surface of the magnetic slip (31) is provided with an anti-skid groove.

7. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The battery and the control circuit are installed in the fixing cylinder (1), and a sealing plug is provided between the stroke assembly (2) and the anchor assembly (3) in the fixing cylinder (1).

8. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The scraper assembly comprises a scraper rubber (47). The scraper rubber (47) is sleeved on the outer wall of the overshot tube (41). The scraper rubber (47) has multiple layers.

9. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The outer wall of the fixing cylinder (1) may also be provided with a straightening rubber.

10. The self-counting drill rod inner wall scraping device according to claim 1, characterized in that: The counterweight assembly (5) comprises a guide shoe (51) fixedly connected to the lower end of the fixing tube (1), a counterweight block (52) is sleeved on the guide shoe (51), and the counterweight block (52) is fixed to the guide shoe (51) by means of a fastening bolt (53).

Images