Mud scraper for petroleum drilling

Abstract

The utility model belongs to the technical field of mud scrapers, and particularly relates to a mud scraper for petroleum drilling, which comprises a shell, a vertically arranged mud scraping cavity is arranged in the middle of the shell, a spiral mud scraping piece is rotatably connected in the mud scraping cavity, and a spiral section is formed by spiral of the spiral mud scraping piece by a circle. The spiral mud scraping piece comprises a first rotary scraper rotationally connected into the mud scraping cavity, the lower end of the first rotary scraper is fixedly connected with a second rotary scraper, and the height of the spiral section of the first rotary scraper is smaller than that of the spiral section of the second rotary scraper. The upper side of the shell is fixedly connected with a driving unit, the driving unit is in transmission connection with the spiral mud scraping piece, the driving unit comprises a servo motor, and the servo motor is fixedly connected to the inner side of the shell. According to the sludge scraper, the sludge scraping effect can be guaranteed, meanwhile, large downward thrust is applied to sludge, and the phenomenon that the sludge remains at the bottom of the sludge scraper is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of mud scraper technology, specifically relating to a mud scraper for oil drilling. Background Technology

[0002] In oil drilling operations, the cleaning of the drill pipe is crucial. With the continuous deepening of oil extraction and the increasing complexity of the working environment, traditional drill pipe cleaning methods face many challenges. In the past, the cleaning of mud and dirt on oil drill pipes was usually done by relatively simple mechanical scraping or flushing methods. However, these methods have problems such as incomplete cleaning and low efficiency.

[0003] For example, Chinese patent CN218624177U discloses an air-inflatable mud scraping device for drilling, which uses an inner tube for mud scraping. After the inner tube is inflated, it has good wrapping properties and will not cause any missed scraping.

[0004] However, during the sludge scraping process, the mud scraped off from the outside of the drill pipe will stick to the bottom of the scraper due to its adhesive force, which can easily result in mud residue at the bottom of the scraper. Utility Model Content

[0005] The purpose of this invention is to provide a mud scraper for oil drilling that can apply a large downward force to the mud while ensuring the mud scraping effect, thereby reducing the phenomenon of mud residue at the bottom of the mud scraper.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A mud scraper for oil drilling includes a housing, a vertically arranged mud scraping chamber is provided in the middle of the housing, and a spiral mud scraper is rotatably connected inside the mud scraping chamber, wherein one turn of the spiral mud scraper constitutes one spiral segment.

[0008] The spiral scraper blade includes a first rotating scraper rotatably connected inside the scraping chamber, and a second rotating scraper fixedly connected to the lower end of the first rotating scraper. The spiral section height of the first rotating scraper is smaller than the spiral section height of the second rotating scraper.

[0009] A drive unit is fixedly connected to the upper side of the housing, and the drive unit is connected to the spiral scraper blades in a transmission connection.

[0010] Furthermore, the drive unit includes a servo motor, which is fixedly connected to the inner side of the housing. The output end of the servo motor passes through the upper end of the housing and is fixedly connected to a gear two. One side of the gear two is meshed with a gear one. The gear one is rotatably connected to the upper side of the housing. The lower end of the gear one is fixedly connected to two rotating rods. The two rotating rods are located inside the scraping chamber. The rotating scraper two and the rotating scraper one are both fixedly connected to the rotating rods.

[0011] Furthermore, the inner wall of the housing is provided with multiple vertical grooves, and multiple high-pressure nozzles are fixedly connected in the vertical grooves. A water storage chamber is fixedly connected inside the housing and outside the mud scraping chamber. The multiple high-pressure nozzles are all connected to the water storage chamber. A water inlet is fixedly connected to the outside of the water storage chamber, and one end of the water inlet penetrates through the side wall of the housing.

[0012] Furthermore, a filter screen is fixedly connected inside the vertical concave groove and on the side of the high-pressure nozzle near the housing axis.

[0013] Furthermore, the rotating scraper is made of steel.

[0014] The technical effects achieved by this utility model are as follows:

[0015] This utility model discloses a mud scraper for oil drilling. It has two rotating blades inside the scraper. The rotating blade one cleans the mud on the outside of the drill pipe to ensure the mud scraping effect. The rotating blade two applies a large downward pushing force to the mud, which can effectively separate the mud from the scraper under the action of the downward pushing force, reducing the phenomenon of mud residue at the bottom of the scraper. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a front sectional view of the present invention;

[0019] Figure 4 This is an enlarged view of the high-pressure nozzle and filter screen of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Housing; 2. Gear 1; 3. Gear 2; 4. Inlet; 5. Servo motor; 6. Rotary scraper 1; 7. Rotary scraper 2; 8. Water storage chamber; 9. High-pressure nozzle; 10. Filter screen; 11. Rotating rod; 12. Scraper. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figure 1-4 As shown, a mud scraper for oil drilling includes a housing 1, a vertically arranged mud scraping chamber is provided in the middle of the housing 1, and a spiral mud scraper is rotatably connected inside the mud scraping chamber. One spiral rotation of the spiral mud scraper constitutes one spiral segment.

[0024] The spiral scraper blade includes a rotating scraper 6 rotatably connected inside the scraping chamber, and a rotating scraper 7 fixedly connected to the lower end of the rotating scraper 6. The spiral section height of the rotating scraper 6 is less than the spiral section height of the rotating scraper 7.

[0025] A drive unit is fixedly connected to the upper side of the housing 1. The drive unit is connected to the spiral scraper blades. When in use, the user installs the scraper on the drilling platform or wellhead, passes the drill pipe through the scraping chamber, and makes the drill pipe close to the surface of the first rotary scraper 6 and the second rotary scraper 7. At this time, the drive unit is started to drive the first rotary scraper 6 and the second rotary scraper 7 to rotate. When the drill pipe is moved out of the borehole, the drill pipe will move upward inside the scraping chamber. At this time, the sludge on the outside of the drill pipe will first come into contact with the second rotary scraper 7. Because the spiral section of the second rotary scraper 7 is relatively high, the blade angle of the second rotary scraper 7 is relatively large. During the rotation of the second rotary scraper 7, a large downward pushing force will be applied to the sludge on the outside of the drill pipe, which can effectively separate the sludge from the scraper under the action of the downward pushing force, reducing the phenomenon of sludge remaining at the bottom of the scraper.

[0026] The residual sludge on the outside of the drill pipe after being cleaned by the rotating scraper 2 7 will come into contact with the rotating scraper 1 6. The rotating scraper 1 6 can effectively clean the residual sludge on the outside of the drill pipe, thereby improving the cleaning effect and ensuring the cleanliness of the drill pipe surface.

[0027] The drive unit includes a servo motor 5, which is fixedly connected to the inside of the housing 1. The output end of the servo motor 5 passes through the upper end of the housing 1 and is fixedly connected to a gear 2. One side of the gear 2 is meshed with a gear 1. The gear 1 is rotatably connected to the upper side of the housing 1. The lower end of the gear 1 is fixedly connected to two rotating rods 11. The two rotating rods 11 are located inside the sludge scraping chamber. The rotating scraper 2 7 and the rotating scraper 1 6 are both fixedly connected to the rotating rods 11. When the servo motor 5 starts, it drives the gear 1 2 to rotate through the gear 2 3. When the gear 1 2 rotates, it drives the rotating scraper 1 6 and the rotating scraper 2 7 inside the sludge scraping chamber to rotate through the rotating rods 11, thereby inputting rotational kinetic energy to the rotating scraper 1 6 and the rotating scraper 2 7.

[0028] See Figure 2As shown, the inner wall of the housing 1 has multiple vertical grooves, and multiple high-pressure nozzles 9 are fixedly connected in the vertical grooves. A water storage chamber 8 is fixedly connected inside the housing 1 and outside the sludge scraping chamber. The multiple high-pressure nozzles 9 are all connected to the water storage chamber 8. A water inlet 4 is fixedly connected to the outside of the water storage chamber 8. One end of the water inlet 4 passes through the side wall of the housing 1. Before the drive unit is started, the high-pressure water pipe is connected to the water inlet 4. The water flows into the water storage chamber 8 through the water inlet 4 and is transmitted to the high-pressure nozzles 9 by the water storage chamber 8. The high-pressure nozzles 9 spray out and can generate a powerful jet of water with high impact force and cleaning ability. The high-pressure water flow first impacts and softens the dirt, making it easier to be removed by the rotating scraper 1 6 and rotating scraper 2 7.

[0029] See Figure 4 As shown, a filter screen 10 is fixedly connected inside the vertical concave groove and on the side of the high-pressure nozzle 9 near the axis of the housing 1. During the operation of the sludge scraper, when substances containing sludge and other impurities approach the concave groove and the high-pressure nozzle 9, the filter screen 10, with its fine pore structure, blocks larger sludge particles and allows only cleaner high-pressure water to pass through. In this way, the high-pressure nozzle 9 can always remain unobstructed, ensuring that the high-pressure nozzle 9 can work normally.

[0030] See Figure 2-3 As shown, a scraper 12 is fixedly connected to the lower end of the rotary scraper 7. The scraper 12 is located at the lower end of the housing 1. When in use, the spiral scraper blades work on the surface of the drill pipe, and some stubborn sludge will accumulate at the bottom. When the rotary scraper 7 rotates, it will drive the scraper 12 to rotate together. The scraper 12 rotates and scrapes the bottom of the scraper to remove the sludge accumulated at the bottom of the scraper.

[0031] See Figure 3 As shown, the rotary scraper 27 is made of steel. Thanks to the rigidity of this material, it has a powerful scraping ability. When faced with various stubborn sludge, it can remove it thoroughly from the surface with firm force. Whether it is sticky sludge or tightly adhered stains, the rotary scraper can handle it efficiently, ensuring that the sludge is completely cleaned without leaving any residue. On the other hand, the rotary scraper can also convey the sludge away while removing it.

[0032] The working principle of this utility model is as follows:

[0033] When the drill pipe is removed from the borehole, it moves upward inside the sludge scraping chamber. At this time, the servo motor 5 is started to drive the rotating scraper 1 6 and rotating scraper 2 7 to rotate. The sludge on the outside of the drill pipe will first come into contact with the rotating scraper 2 7. Due to the large height of the spiral section of the rotating scraper 2 7, the blade angle of the rotating scraper 2 7 is large. During the rotation of the rotating scraper 2 7, a large downward pushing force will be applied to the sludge on the outside of the drill pipe, which can effectively separate the sludge from the scraper under the action of the downward pushing force, reducing the phenomenon of sludge remaining at the bottom of the scraper.

[0034] After the residual sludge on the outside of the drill pipe is cleaned by the second rotary scraper 7, it will come into contact with the first rotary scraper 6. The first rotary scraper 6 can effectively clean the residual sludge on the outside of the drill pipe, thereby improving the cleaning effect and ensuring the cleanliness of the drill pipe surface.

[0035] At the same time, the high-pressure water pipe is connected to the water inlet 4. The high-pressure water flow in the water inlet 4 enters the water storage chamber 8 and is then sprayed out by the high-pressure nozzle 9. The high-pressure nozzle 9 can generate a powerful jet of water with high impact and cleaning ability. The high-pressure water flow first impacts and softens the dirt, making it easier to be removed by the rotating scraper 6 and the rotating scraper 7. At the same time, the scraper 12 fixed on the lower side of the rotating scraper 7 drives the scraper 12 to rotate and scrape the bottom of the scraper.

[0036] In summary, this technical solution incorporates rotating scraper 6 and rotating scraper 7 inside the scraper. The rotating scraper 6 cleans the sludge on the outside of the drill pipe, ensuring effective scraping. The rotating scraper 7 applies a large downward pushing force to the sludge, effectively separating it from the scraper and reducing sludge residue at the bottom of the scraper.

[0037] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A mud scraper for oil drilling, characterized in that: Includes a housing (1), and a vertically arranged sludge scraping chamber is provided in the middle of the housing (1). A spiral sludge scraping blade is rotatably connected inside the sludge scraping chamber. One spiral rotation of the spiral sludge scraping blade is one spiral segment. The spiral scraper blade includes a rotating scraper one (6) rotatably connected inside the scraping chamber. A rotating scraper two (7) is fixedly connected to the lower end of the rotating scraper one (6). The spiral section height of the rotating scraper one (6) is less than the spiral section height of the rotating scraper two (7). A drive unit is fixedly connected to the upper side of the housing (1), and the drive unit is connected to the spiral scraper blade in a transmission connection.

2. The mud scraper for oil drilling according to claim 1, characterized in that: The drive unit includes a servo motor (5), which is fixedly connected to the inside of the housing (1). The output end of the servo motor (5) is fixedly connected to a gear 2 (3) through the upper end of the housing (1). A gear 1 (2) is meshed on one side of the gear 2 (3). The gear 1 (2) is rotatably connected to the upper side of the housing (1). Two rotating rods (11) are fixedly connected to the lower end of the gear 1 (2). The two rotating rods (11) are located inside the scraping chamber. The rotating scraper 2 (7) and the rotating scraper 1 (6) are both fixedly connected to the rotating rods (11).

3. A mud scraper for oil drilling according to claim 1, characterized in that: The inner wall of the housing (1) is provided with multiple vertical grooves, and multiple high-pressure nozzles (9) are fixedly connected in the vertical grooves. A water storage chamber (8) is fixedly connected inside the housing (1) and outside the mud scraping chamber. The multiple high-pressure nozzles (9) are all connected to the water storage chamber (8). A water inlet (4) is fixedly connected to the outside of the water storage chamber (8). One end of the water inlet (4) penetrates through the side wall of the housing (1).

4. A mud scraper for oil drilling according to claim 3, characterized in that: A filter screen (10) is fixedly connected inside the vertical groove and on the side of the high-pressure nozzle (9) near the axis of the housing (1).

5. A mud scraper for oil drilling according to claim 1, characterized in that: The lower end of the rotating scraper (7) is fixedly connected to a scraper (12), which is located at the lower end of the housing (1).

6. A mud scraper for oil drilling according to claim 1, characterized in that: The rotating scraper 2 (7) is made of steel.

Images