Rope scraper

Abstract

The utility model relates to a rope scraper, and relates to the technical field of well drilling. The rope scraper comprises a pipe body, an extrusion assembly, a rubber sleeve and an air blowing module, the extrusion assembly, the rubber sleeve and the air blowing module are arranged in the pipe body, a cable can penetrate in from the first end of the pipe body, sequentially penetrate through the extrusion assembly, the rubber sleeve and the air blowing module and then penetrate out from the second end of the pipe body, the extrusion assembly is movably arranged in the pipe body, one end of the extrusion assembly is connected with the rubber sleeve, and the other end of the extrusion assembly is connected with the air blowing module. A first annular cavity is formed between the outer wall of the air blowing module and the inner wall of the pipe body, a first channel for a cable to penetrate through is formed in the axis of the air blowing module, multiple air channels surrounding the first channel are formed in the air blowing module, and the two ends of each air channel are connected with the first annular cavity and the first channel respectively. The pipe body is further provided with an air inlet pipe communicating with the first annular cavity. According to the rope scraper, oil dirt on the surface of a cable can be blown off by means of air flow by means of the flowing characteristic of air, and the cleaning effect on the cable can be remarkably improved by means of the cleaning effect of the rubber sleeve.

Description

Technical Field

[0001] This utility model relates to the field of drilling technology, and in particular to a rope scraper. Background Technology

[0002] Rope scrapers are an essential component of blowout preventer (BOP) systems in oilfields. When a cable passes through the BOP during downhole operations, it's necessary to scrape off the layer of oil adhering to the cable and collect the scraped oil through the return pipe back to a designated oil tank. The rope scraper is crucial for this task. Chinese patent CN204002704U discloses an annular logging cable oil scraper that uses a scraper sleeve to clean oil from the cable. While this method of scraping oil using direct physical friction achieves some effect, it doesn't effectively remove oil from between the cable wires, and oil still splashes onto the equipment and well site surface when the cable is pulled up. Utility Model Content

[0003] This utility model provides a rope scraper that uses a combination of rubber sleeve scraping and air blowing to remove oil stains from cables, resulting in better cleaning effect.

[0004] This utility model provides a rope scraper, including a tube body and a squeezing assembly, a rubber sleeve, and an air blowing module disposed inside the tube body. A cable can pass through the first end of the tube body, and then pass through the squeezing assembly, the rubber sleeve, and the air blowing module in sequence before exiting from the second end of the tube body. The squeezing assembly is movably disposed inside the tube body and one end of it is connected to the rubber sleeve. A first annular cavity is formed between the outer wall of the air blowing module and the inner wall of the tube body. A first channel for the cable to pass through is opened on the axis of the air blowing module. A plurality of air passages are opened on the air blowing module surrounding the first channel. The two ends of the air passages are respectively connected to the first annular cavity and the first channel. The tube body is also provided with an air inlet pipe communicating with the first annular cavity.

[0005] In one embodiment, the extrusion assembly includes a piston, an extrusion block, and a spring. One end of the spring is fixedly disposed inside the tube body, and the other end of the spring is connected to one end of the piston. The two ends of the extrusion block are respectively connected to the piston and the rubber sleeve, and the extrusion block is located inside the spring.

[0006] In one embodiment, the piston includes a base and a protrusion disposed on the base. The outer diameter of the base is larger than the outer diameter of the protrusion. A second annular cavity is formed between the surface of the base, the surface of the protrusion, and the inner wall of the tube. The tube is also provided with a hydraulic pipe communicating with the second annular cavity.

[0007] In one embodiment, the tube body has a sleeve inside, the rubber sleeve is disposed inside the sleeve, the rubber sleeve has a second channel for the cable to pass through, the first end of the rubber sleeve connected to the extrusion assembly is frustoconical and fits against the surface of the extrusion assembly, and the second end of the rubber sleeve is fixedly disposed inside the tube body.

[0008] In one embodiment, the second channel forms an inverted frustum-shaped opening at the first end of the rubber sleeve.

[0009] In one embodiment, the inner surface of the rubber sleeve is provided with a plurality of third annular cavities spaced apart, the third annular cavities surrounding the second channel.

[0010] In one embodiment, a third channel is provided between the rubber sleeve and the air blowing module, and a removable sealing plug is provided on the tube body. After the sealing plug is removed, the third channel communicates with the outside of the tube body.

[0011] In one embodiment, the tube body is further provided with a storage cavity, which is located between the air blowing module and the second end of the tube body. The tube body is also provided with a drain pipe, which is connected to the storage cavity.

[0012] In one embodiment, the first end of the tube is further provided with a flared opening, and the smaller end of the flared opening is connected to the first end of the tube.

[0013] In one embodiment, the intake pipe is provided with a one-way valve.

[0014] Compared with existing technologies, the advantages of this invention are that the extrusion assembly can deform the rubber sleeve by extruding it, thereby gripping the cable. This not only scrapes away oil stains on the cable but also provides a sealing effect, preventing gas entering the air blowing module from leaking out of the rubber sleeve and causing oil stains to spray back from the first end of the tube. This improves the cleaning effect of the airflow from the air blowing module on the cable surface. For cables made of multi-strand steel wires, the rubber sleeve alone cannot effectively remove oil stains between the wires. However, the rope scraper of this invention utilizes the flow characteristics of gas to blow away oil stains from the cable surface using airflow. Combined with the cleaning effect of the rubber sleeve, this significantly improves the cleaning effect on the cable. Attached Figure Description

[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0016] Figure 1 This is a perspective view of the rope scraper in an embodiment of this utility model;

[0017] Figure 2This is a top view of the rope scraper in an embodiment of this utility model;

[0018] Figure 3 This is a cross-sectional view of the rope scraper in an embodiment of this utility model;

[0019] Figure 4 This is a cross-sectional view of the air blowing module in an embodiment of this utility model;

[0020] Figure 5 This is a cross-sectional view of the piston, extrusion block, and rubber sleeve in an embodiment of this utility model.

[0021] Figure label:

[0022] 1. Tube body; 11. Sleeve; 2. Extrusion assembly; 21. Piston; 211. Base; 212. Protrusion; 22. Extrusion block; 23. Spring; 3. Rubber sleeve; 4. Air blowing module; 41. Air passage; 5. Air inlet pipe; 51. One-way valve; 6. Hydraulic pipe; 7. Sealing plug; 8. Drain pipe; 9. Trumpet mouth; 110. First annular cavity; 120. Second annular cavity; 130. Third annular cavity; 140. Storage cavity; 210. First channel; 220. Second channel; 230. Third channel. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figures 1 to 3 As shown, a rope scraper according to an embodiment of the present invention includes a tube body 1 and a compression assembly 2, a rubber sleeve 3, and an air blowing module 4 disposed inside the tube body 1. A cable (not shown in the figure) can pass through the first end of the tube body 1, and sequentially pass through the compression assembly 2, the rubber sleeve 3, and the air blowing module 4 before exiting from the second end of the tube body 1. The compression assembly 2 is movably disposed inside the tube body 1, and one end of it is connected to the rubber sleeve 3. A first annular cavity 110 is formed between the outer wall of the air blowing module 4 and the inner wall of the tube body 1. Figure 4 As shown, the air blowing module 4 has a first channel 210 on its axis for the cable to pass through. The air blowing module 4 has multiple air passages 41 surrounding the first channel 210. The two ends of each air passage 41 are connected to the first annular cavity 110 and the first channel 210, respectively. The tube body 1 also has an air inlet pipe 5 communicating with the first annular cavity 110. Compressed gas enters the first annular cavity 110 through the air inlet pipe 5 and then flows into each air passage 41, performing a 360-degree purging of the cable and effectively removing oil stains from its surface. To achieve a better purging effect, the air passages 41 and the first channel 210 are set at an acute angle to facilitate the peeling of oil stains from the cable surface. Figure 3 As shown, the intake pipe 5 is equipped with a one-way valve 51 to prevent the backflow of gas or oil inside the pipe body 1.

[0025] The extrusion assembly 2 can deform the rubber sleeve 3 by extruding it, thereby gripping the cable. This not only scrapes away oil stains on the cable but also provides a sealing effect, preventing gas entering the air blowing module 4 from leaking out of the rubber sleeve 3 and causing oil stains to spray out from the first end of the tube body 1. This improves the cleaning effect of the airflow from the air blowing module 4 on the cable surface. For cables made of multi-strand steel wires, the rubber sleeve 3 alone cannot effectively remove oil stains between the steel wires. However, the cable scraper in this embodiment utilizes the flow characteristics of gas to blow away oil stains from the cable surface using airflow. Combined with the cleaning effect of the rubber sleeve 3, this significantly improves the cleaning effect on the cable.

[0026] like Figure 3 As shown, the compression assembly 2 includes a piston 21, a compression block 22, and a spring 23. One end of the spring 23 is fixedly disposed inside the tube body 1, and the other end of the spring 23 is connected to one end of the piston 21. The two ends of the compression block 22 are respectively connected to the piston 21 and the rubber sleeve 3, and the compression block 22 is located inside the spring 23. When the piston 21 moves towards the second end of the tube body 1, the spring 23 is compressed, and the compression block 22 is pushed by the piston 21 to apply pressure to the rubber sleeve 3, causing the rubber sleeve 3 to deform, thereby allowing the rubber sleeve 3 to grip the cable. When the rubber sleeve 3 needs to release the cable, it stops pushing the piston 21, and the elastic force of the spring 23 allows the piston 21 to return to its original position.

[0027] like Figure 3 and Figure 5 As shown, the piston 21 further includes a base 211 and a protrusion 212 disposed on the base 211. The outer diameter of the base 211 is larger than the outer diameter of the protrusion 212. The surface of the base 211, the surface of the protrusion 212, and the inner wall of the tube 1 together form a second annular cavity 120. The tube 1 is also provided with a hydraulic pipe 6 communicating with the second annular cavity 120. After hydraulic oil is injected into the second annular cavity 120 through the hydraulic pipe 6, the pressure exerted by the hydraulic oil on the surface of the base 211 causes the piston 21 to move and compress the spring 23. The volume of the second annular cavity 120 also expands accordingly but remains sealed, and no hydraulic oil leakage occurs.

[0028] like Figure 3 and Figure 5 As shown, the tube body 1 has a sleeve 11 inside, and a rubber sleeve 3 is disposed inside the sleeve 11. A second channel 220 for the cable to pass through is opened inside the rubber sleeve 3. The first end of the rubber sleeve 3 connected to the extrusion assembly 2 is frustoconical and fits against the surface of the extrusion assembly 2. The second end of the rubber sleeve 3 is fixedly disposed inside the tube body 1. The sleeve 11 prevents the rubber sleeve 3 from expanding laterally. The frustoconical shape of the first end of the rubber sleeve 3 allows the rubber sleeve 3 to deform and contract the second channel 220 after the extrusion assembly 2 extrudes it, thus better securing the cable.

[0029] Furthermore, the second channel 220 forms an inverted frustum-shaped opening at the first end of the sleeve 3. The inverted frustum-shaped opening at the first end of the sleeve 3 makes the inlet diameter of the second channel 220 larger, making it easier for the cable to pass through the sleeve 3.

[0030] like Figure 5 As shown, the sleeve 3 has multiple third annular cavities 130 spaced apart inside, which surround the second channel 220. The multiple third annular cavities 130 make it easier for the sleeve 3 to deform under the pressure of the compression assembly 2, thereby tightening the cable and reducing the hydraulic oil pressure required to push the piston 21, thus reducing the risk of hydraulic oil leakage.

[0031] like Figure 3 As shown, a third channel 230 is provided between the rubber sleeve 3 and the air blowing module 4. Figure 1 As shown, the tube body 1 is provided with a removable sealing plug 7. After the sealing plug 7 is removed, the third channel 230 is connected to the outside of the tube body 1. In this embodiment, the sealing plug 7 is a threaded plug. Some oil on the cable may fall into the third channel 230. By providing a removable sealing plug 7, the oil inside the third channel 230 can be easily discharged, avoiding excessive oil accumulation in the third channel 230.

[0032] like Figure 3 As shown, the tube body 1 also has a storage chamber 140 inside, which is located between the air blowing module 4 and the second end of the tube body 1. The tube body 1 is also equipped with a drain pipe 8, which is connected to the storage chamber 140. The oil and dirt blown off the cable will accumulate in the storage chamber 140, and the oil and dirt in the storage chamber 140 can be discharged in a timely manner through the drain pipe 8, so that the cleaning operation of the cable can be carried out continuously.

[0033] like Figures 1 to 3 As shown, the first end of the pipe body 1 is also provided with a flared mouth 9, and the small end of the flared mouth 9 is connected to the first end of the pipe body 1. The flared mouth 9 has a large opening, which can guide the cable, thereby facilitating the cable to pass through the pipe body 1.

[0034] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A rope scraper, characterized in that, The device includes a tube body and a compression assembly, a rubber sleeve, and an air blowing module disposed inside the tube body. A cable can pass through the first end of the tube body, and then pass through the compression assembly, the rubber sleeve, and the air blowing module in sequence before exiting from the second end of the tube body. The compression assembly is movably disposed inside the tube body, and one end of the compression assembly is connected to the rubber sleeve. A first annular cavity is formed between the outer wall of the air blowing module and the inner wall of the tube body. A first channel for the cable to pass through is opened on the axis of the air blowing module. A plurality of air passages are opened on the air blowing module surrounding the first channel. The two ends of the air passages are respectively connected to the first annular cavity and the first channel. The tube body is also provided with an air inlet pipe communicating with the first annular cavity.

2. The rope scraper according to claim 1, characterized in that, The extrusion assembly includes a piston, an extrusion block, and a spring. One end of the spring is fixedly disposed inside the tube body, and the other end of the spring is connected to one end of the piston. The two ends of the extrusion block are respectively connected to the piston and the rubber sleeve, and the extrusion block is located inside the spring.

3. The rope scraper according to claim 2, characterized in that, The piston includes a base and a protrusion disposed on the base. The outer diameter of the base is larger than the outer diameter of the protrusion. The surface of the base, the surface of the protrusion, and the inner wall of the tube together form a second annular cavity. The tube is also provided with a hydraulic pipe communicating with the second annular cavity.

4. The rope scraper according to claim 1, characterized in that, The tube body has a sleeve inside, and the rubber sleeve is disposed inside the sleeve. The rubber sleeve has a second channel for the cable to pass through. The first end of the rubber sleeve connected to the extrusion assembly is frustoconical and fits against the surface of the extrusion assembly. The second end of the rubber sleeve is fixedly disposed inside the tube body.

5. The rope scraper according to claim 4, characterized in that, The second channel forms an inverted frustum-shaped opening at the first end of the rubber sleeve.

6. The rope scraper according to claim 5, characterized in that, The inner part of the rubber sleeve is provided with multiple third annular cavities, which surround the second channel.

7. The rope scraper according to claim 1, characterized in that, A third channel is provided between the rubber sleeve and the air blowing module. A removable sealing plug is provided on the tube body. After the sealing plug is removed, the third channel communicates with the outside of the tube body.

8. The rope scraper according to claim 1, characterized in that, The tube body is also provided with a storage cavity, which is located between the air blowing module and the second end of the tube body. The tube body is also provided with a drain pipe, which is connected to the storage cavity.

9. The rope scraper according to claim 1, characterized in that, The first end of the tube is also provided with a flared mouth, and the small end of the flared mouth is connected to the first end of the tube.

10. The rope scraper according to claim 1, characterized in that, The intake pipe is equipped with a one-way valve.

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