Water well oil pipe capable of reducing installation abrasion

Abstract

The utility model discloses a well oil pipe capable of reducing installation abrasion, which relates to the technical field of well oil pipes and comprises an oil pipe body, the oil pipe body comprises an inner pipe, an inner anticorrosion oil pipe and two oil pipe couplings, and the outer surfaces of the oil pipe couplings are fixedly connected with coupling sheaths. The outer surface of the left end of the inner anti-corrosion oil pipe is in threaded connection with the inner surface of the left-end oil pipe coupling, the middle of the outer surface of the inner anti-corrosion oil pipe is fixedly connected with an outer anti-corrosion wear-resisting sleeve, and the outer surface of the inner anti-corrosion oil pipe on the left side of the outer anti-corrosion wear-resisting sleeve is fixedly connected with an oil pipe upper sheath; the outer surface of the inner anti-corrosion oil pipe on the right side of the outer anti-corrosion wear-resistant sleeve is fixedly connected with an oil pipe lower sheath; a sealing element II is adhered to the outer surface of the inner anti-corrosion oil pipe on the right side of the oil pipe lower sheath; through the cooperation of the structure, abrasion generated after the inner anti-corrosion oil pipe and the oil pipe coupling are in butt joint installation and use can be reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water well oil pipes, in particular to a water well oil pipe with reduced installation wear. Background Art

[0002] In oil production, the mineralization of wastewater in injection wells is high. In order to deal with the problem of oil pipe corrosion, anti-corrosion oil pipes are usually used. However, after the oil pipes and oil pipe couplings are docked and installed, it is found that the outer anti-corrosion layer material of the anti-corrosion oil pipes is subject to various environmental factors such as soil pressure and microbial decomposition during the installation and subsequent use. Since the anti-corrosion oil pipes are usually buried underground, the anti-corrosion layer must withstand various environmental factors such as soil pressure and microbial decomposition. These will accelerate the wear of the outer anti-corrosion layer of the oil pipe, and the scrap rate is high. Therefore, it is necessary to provide a water well oil pipe that can reduce installation wear. Utility Model Content

[0003] The purpose of the utility model is to provide a water well oil pipe with reduced installation wear, so as to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a water well oil pipe with reduced installation wear, comprising an inner anti-corrosion oil pipe and two oil pipe couplings, the outer surface of the oil pipe coupling is fixedly connected with a coupling sleeve, the outer surface of the left end of the inner anti-corrosion oil pipe is threadedly connected to the inner surface of the oil pipe coupling at the left end, the outer surface of the right end of the inner anti-corrosion oil pipe is threadedly connected to the inner surface of the oil pipe coupling at the right end, the middle part of the outer surface of the inner anti-corrosion oil pipe is fixedly connected with an outer anti-corrosion wear-resistant sleeve, the inner anti-corrosion on the left side of the outer anti-corrosion wear-resistant sleeve The outer surface of the oil pipe is fixedly connected to the oil pipe upper sleeve, and the outer surface of the inner anti-corrosion oil pipe on the left side of the oil pipe upper sleeve is bonded with a seal 1, and the end of the seal 1 away from the oil pipe upper sleeve is in contact with the inner surface of the oil pipe coupling at the left end. The outer surface of the inner anti-corrosion oil pipe on the right side of the outer anti-corrosion and wear-resistant sleeve is fixedly connected to the oil pipe lower sleeve, and the outer surface of the inner anti-corrosion oil pipe on the right side of the oil pipe lower sleeve is bonded with a seal 2, and the end of the seal 2 away from the oil pipe lower sleeve is in contact with the inner surface of the oil pipe coupling at the right end.

[0005] In one example, the outer corrosion-resistant and wear-resistant sleeve is made of ultra-high molecular polyethylene material.

[0006] In one example, the first seal and the second seal are made of oxidized nitrile butadiene rubber material.

[0007] In one example, the two oil pipe couplings are respectively provided at both ends of the inner anti-corrosion oil pipe.

[0008] In one example, the inner side wall of the inner anti-corrosion oil pipe is provided with a hydrogen peroxide coating.

[0009] In one example, the coupling jacket, the upper tubing jacket, and the lower tubing jacket are made of 304 stainless steel.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0011] 1. In the present invention, after the inner anti-corrosion oil pipe is butt-jointed with the two oil pipe couplings, the upper and lower oil pipe sheaths are made of corrosion-resistant 304 stainless steel material to form a sheath, which can effectively resist the corrosion of soil, air and conveying medium, protect the oil pipe from erosion and extend its service life. Moreover, the stainless steel sheath has strong hardness and is not easy to wear. It can maintain a small amount of wear for a long time under heavy load and high-speed movement, providing an additional protective layer for the inner anti-corrosion oil pipe; and the outer anti-corrosion and wear-resistant sleeve is made of ultra-high molecular polyethylene material. The molecular chain of ultra-high molecular polyethylene material is long and flexible, with high crystallinity, higher hardness and rigidity, high wear resistance, and low friction coefficient, which can effectively reduce wear and extend service life, thereby reducing the wear of the inner anti-corrosion oil pipe after butt-jointed installation and use; through the cooperation of the above structures, the wear of the inner anti-corrosion oil pipe and the oil pipe coupling after butt-jointed installation and use can be reduced, and the service life can be improved.

[0012] 2. In this utility model, the first and second seals used to enhance the sealing performance when connecting the inner anti-corrosion oil pipe and the two oil pipe couplings are made of oxidized nitrile rubber, which has good wear resistance and heat resistance. When the inner anti-corrosion oil pipe is rotated and threadedly connected to the oil pipe coupling, the first and second seals made of nitrile rubber can effectively reduce the loss caused by friction and reduce the wear during the docking installation of the inner anti-corrosion oil pipe and the oil pipe coupling. In addition, the first and second seals made of nitrile rubber can maintain stable performance within a certain temperature range, avoiding aging and failure caused by high temperature, thereby increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the seal, oil pipe coupling and internal anti-corrosion oil pipe of the utility model.

[0015] In the figure: 1. Oil pipe coupling; 2. Coupling sleeve; 3. Seal 1; 4. Upper sleeve of oil pipe; 5. Inner anti-corrosion oil pipe; 6. Outer anti-corrosion and wear-resistant sleeve; 7. Lower sleeve of oil pipe; 8. Seal 2. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] The utility model provides Figure 1 and Figure 2 The water well oil pipe with reduced installation wear shown in the figure comprises an inner anti-corrosion oil pipe 5 and two oil pipe couplings 1. The outer surface of the oil pipe coupling 1 is fixedly connected with a coupling sheath 2. The two oil pipe couplings 1 are respectively arranged at both ends of the inner anti-corrosion oil pipe 5. The inner side wall of the inner anti-corrosion oil pipe 5 is provided with a hydrogen peroxide resin coating. The outer surface of the left end of the inner anti-corrosion oil pipe 5 is threadedly connected with the inner surface of the left end oil pipe coupling 1. The outer surface of the right end of the inner anti-corrosion oil pipe 5 is threadedly connected with the inner surface of the right end oil pipe coupling 1. The middle part of the outer surface of the inner anti-corrosion oil pipe 5 is fixedly connected with an outer anti-corrosion resistant The wear sleeve 6, the outer anti-corrosion and wear-resistant sleeve 6 is made of ultra-high molecular polyethylene material; specifically, the outer anti-corrosion and wear-resistant sleeve 6 is made of ultra-high molecular polyethylene material, the molecular chain of ultra-high molecular polyethylene material is long and flexible, the crystallinity is high, it has higher hardness and rigidity, high wear resistance, low friction coefficient, can effectively reduce wear and extend service life, thereby reducing the wear of the inner anti-corrosion oil pipe 5 during docking installation and use; through the cooperation of the above structure, the wear of the inner anti-corrosion oil pipe 5 and the oil pipe coupling 1 after docking installation and use can be reduced, and the service life can be improved.

[0018] Reference Figure 1 and Figure 2 The outer surface of the inner anti-corrosion oil pipe 5 on the left side of the outer anti-corrosion wear-resistant sleeve 6 is fixedly connected with the oil pipe upper sleeve 4, and the outer surface of the inner anti-corrosion oil pipe 5 on the right side of the outer anti-corrosion wear-resistant sleeve 6 is fixedly connected with the oil pipe lower sleeve 7. The coupling sleeve 2, the oil pipe upper sleeve 4 and the oil pipe lower sleeve 7 are made of 304 stainless steel material; specifically, after the inner anti-corrosion oil pipe 5 is docked and installed with the two oil pipe couplings 1, the oil pipe upper sleeve 4 and the oil pipe lower sleeve 7 are made of corrosion-resistant 304 stainless steel material to form a sleeve, which can effectively resist corrosion from soil, air and conveying medium, protect the oil pipe from erosion, and extend its service life. Moreover, the stainless steel sleeve has strong hardness and is not easy to wear. It can maintain a small amount of wear for a long time under heavy load and high-speed movement, providing an additional protective layer for the inner anti-corrosion oil pipe 5. Through the cooperation of the above structure, the wear of the inner anti-corrosion oil pipe 5 and the oil pipe coupling 1 after docking and installation can be reduced, thereby improving its service life.

[0019] Reference Figure 1 and Figure 2, the outer surface of the inner anti-corrosion oil pipe 5 on the left side of the oil pipe upper sheath 4 is bonded with a seal 1 3, and the end of the seal 1 3 away from the oil pipe upper sheath 4 is in contact with the inner surface of the left end oil pipe coupling 1, and the outer surface of the inner anti-corrosion oil pipe 5 on the right side of the oil pipe lower sheath 7 is bonded with a seal 2 8, and the end of the seal 2 8 away from the oil pipe lower sheath 7 is in contact with the inner surface of the right end oil pipe coupling 1, and the seal 1 3 and the seal 2 8 are made of oxidized nitrile butadiene rubber material; specifically, in order to enhance the sealing when the inner anti-corrosion oil pipe 5 and the two oil pipe couplings 1 are connected, Seal 1 3 and seal 2 8 are made of oxidized nitrile rubber material, which has good wear resistance and heat resistance. When the inner anti-corrosion oil pipe 5 is rotated and threadedly connected to the oil pipe coupling 1, the seal 1 3 and seal 2 8 made of nitrile rubber can effectively reduce the loss caused by friction, and reduce the wear when the inner anti-corrosion oil pipe 5 and the oil pipe coupling 1 are docked and installed. Moreover, the seal 1 3 and seal 2 8 made of nitrile rubber can maintain stable performance within a certain temperature range, avoiding aging and failure caused by high temperature, thereby increasing the service life.

[0020] The working principle of the utility model is as follows: after the inner anti-corrosion oil pipe 5 is docked and installed with the two oil pipe couplings 1, the oil pipe upper sheath 4 and the oil pipe lower sheath 7 are made of corrosion-resistant 304 stainless steel material to form a sheath, which can effectively resist the corrosion of soil, air and conveying medium, protect the oil pipe from erosion, and extend its service life. Moreover, the stainless steel sheath has strong hardness and is not easy to wear. It can maintain a small amount of wear for a long time under heavy load and high-speed movement, providing an additional protective layer for the inner anti-corrosion oil pipe 5; and the outer anti-corrosion and wear-resistant sleeve 6 is made of ultra-high molecular polyethylene material. The molecular chain of ultra-high molecular polyethylene material is long and flexible, with high crystallinity, higher hardness and rigidity, high wear resistance, and low friction coefficient, which can effectively reduce wear and extend service life, thereby reducing the wear of the inner anti-corrosion oil pipe 5 after docking and installation; through the cooperation of the above structure, the wear of the inner anti-corrosion oil pipe 5 and the oil pipe coupling 1 after docking and installation can be reduced, and the service life can be improved.

[0021] On the other hand, the seals 1 3 and 2 8 used to enhance the sealing when the inner anti-corrosion oil pipe 5 and the two oil pipe couplings 1 are connected are made of oxidized nitrile rubber material, which has good wear resistance and heat resistance. When the inner anti-corrosion oil pipe 5 is rotated and threadedly connected to the oil pipe coupling 1, the seals 1 3 and 2 8 made of nitrile rubber can effectively reduce the loss caused by friction, and reduce the wear when the inner anti-corrosion oil pipe 5 and the oil pipe coupling 1 are docked and installed. Moreover, the seals 1 3 and 2 8 made of nitrile rubber can maintain stable performance within a certain temperature range, avoiding aging and failure caused by high temperature, thereby increasing the service life.

[0022] In the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can all be customized according to the description and the drawings.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water well oil pipe with reduced installation wear, comprising an inner anti-corrosion oil pipe (5) and two oil pipe couplings (1), characterized in that: The outer surface of the oil pipe coupling (1) is fixedly connected with a coupling sleeve (2), the outer surface of the left end of the inner anti-corrosion oil pipe (5) is threadedly connected to the inner surface of the oil pipe coupling (1) at the left end, the outer surface of the right end of the inner anti-corrosion oil pipe (5) is threadedly connected to the inner surface of the oil pipe coupling (1) at the right end, the outer surface of the inner anti-corrosion oil pipe (5) is fixedly connected with an outer anti-corrosion wear-resistant sleeve (6) at the middle of the outer surface of the inner anti-corrosion oil pipe (5), the outer surface of the inner anti-corrosion oil pipe (5) on the left side of the outer anti-corrosion wear-resistant sleeve (6) is fixedly connected with an oil pipe upper sleeve (4), and the outer surface of the oil pipe upper sleeve (4) on the left side is fixedly connected with an outer surface of the inner anti-corrosion oil pipe (5) on the left side. The outer surface of the inner anti-corrosion oil pipe (5) is bonded with a seal 1 (3), and the end of the seal 1 (3) away from the oil pipe upper sleeve (4) is in contact with the inner surface of the oil pipe coupling (1) at the left end. The outer surface of the inner anti-corrosion oil pipe (5) on the right side of the outer anti-corrosion and wear-resistant sleeve (6) is fixedly connected with the oil pipe lower sleeve (7), and the outer surface of the inner anti-corrosion oil pipe (5) on the right side of the oil pipe lower sleeve (7) is bonded with a seal 2 (8), and the end of the seal 2 (8) away from the oil pipe lower sleeve (7) is in contact with the inner surface of the oil pipe coupling (1) at the right end.

2. The water well oil pipe with reduced installation wear according to claim 1, characterized in that: The outer anti-corrosion and wear-resistant sleeve (6) is made of ultra-high molecular polyethylene material.

3. The water well oil pipe with reduced installation wear according to claim 1, characterized in that: The sealing member 1 (3) and the sealing member 2 (8) are made of oxidized nitrile butadiene rubber material.

4. The water well oil pipe with reduced installation wear according to claim 1, characterized in that: The two oil pipe couplings (1) are respectively arranged at both ends of the inner anti-corrosion oil pipe (5).

5. The water well oil pipe with reduced installation wear according to claim 1, characterized in that: The inner side wall of the inner anti-corrosion oil pipe (5) is provided with a hydrogen peroxide coating.

6. The water well oil pipe with reduced installation wear according to claim 1, characterized in that: The coupling sleeve (2), the oil pipe upper sleeve (4) and the oil pipe lower sleeve (7) are made of 304 stainless steel.

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