Sacrificial anode device for oil well casing

Abstract

The utility model discloses a sacrificial anode device for an oil well casing, which belongs to the technical field of oil well pipeline protection and comprises an oil pipe, a fixing sleeve and an anode block, a mounting seat is arranged on the surface of the fixing sleeve, a mounting hole is formed in the middle of the mounting seat, and the anode block is inserted into the mounting hole. A pressing cover is arranged at an opening of the mounting hole, positioning grooves are formed in the two sides of the pressing cover, the positioning assembly comprises a movable block, a tension spring and a positioning block, the movable block is slidably connected into the groove, the tension spring is fixedly connected between the movable block and the inner bottom wall of the groove, the positioning block is slidably connected to one side of the movable block, and the tension spring is fixedly connected between the movable block and the inner bottom wall of the groove. A guide block is fixedly connected to the end, close to the movable block, of the positioning block, and a guide groove is formed in one side of the movable block; and through the arrangement of the mounting seat, the mounting hole, the gland, the positioning assembly and the positioning groove, the anode block is convenient to replace, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil well pipeline protection, and particularly relates to a sacrificial anode device for oil well casing. Background Art

[0002] Oilfields primarily use pumping units to extract crude oil. Casing is a crucial component of these units, through which crude oil is transported from the well. Casing corrosion can have a significant impact on the units. Shallow casing corrosion is primarily electrochemical. Bicarbonate and carbonate ions in shallow water corrode the casing. The corrosion results in essentially no corrosion on the inner wall of the corroded portion of the casing, while severe corrosion occurs on the outer wall. The primary corrosion products are ferrous oxide and iron sulfide. Shallow surface soil in low-lying areas has low resistivity and is highly corrosive. This makes oil well casing susceptible to corrosion perforation, leading to oil and gas leakage and disrupted production. This results in significant economic losses and environmental pollution. Regular well repairs require anti-corrosion treatment of the well casing, including sandblasting and anti-rust paint. However, this method is time-consuming and labor-intensive, and its effectiveness is limited. Therefore, sacrificial anodes are typically attached to the outside of the tubing.

[0003] In the process of implementing the above, the inventors found that there are at least the following problems in this technology: the anode blocks of the existing sacrificial anode device will be worn out after long-term use, which makes it very troublesome to replace the anode blocks in the later stage and has low work efficiency. Utility Model Content

[0004] The purpose of the present utility model is to provide a sacrificial anode device for oil well casing to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a sacrificial anode device for oil well casing, comprising an oil pipe, a fixed sleeve, and an anode block, wherein the surface of the oil pipe is sheathed with two symmetrically distributed fixed sleeves, the surface of the fixed sleeve is provided with a mounting seat, the middle portion of the mounting seat is provided with a mounting hole, the anode block is inserted into the mounting hole, a gland is provided at the opening of the mounting hole, the mounting seat is provided with grooves on both sides of the mounting hole, a positioning assembly is provided inside the groove, and both sides of the gland are provided with positioning grooves;

[0006] The positioning assembly includes a movable block, a tension spring and a positioning block, the movable block is slidably connected in the groove, the tension spring is fixedly connected between the movable block and the bottom wall of the groove, the positioning block is slidably connected to one side of the movable block, and the positioning block is fixedly connected to a guide block at one end close to the movable block. A guide groove is opened on one side of the movable block, and the guide block is slidably connected in the guide groove.

[0007] As a preferred embodiment, bolts are threadedly connected to both sides of the fixing sleeve, and the two fixing sleeves are fixedly installed by the bolts.

[0008] As a preferred embodiment, a guide angle is provided at one end of the positioning block away from the movable block.

[0009] As a preferred embodiment, a first concave groove is provided on the top of the movable block.

[0010] As a preferred embodiment, a second concave groove is provided on the top of the gland.

[0011] As a preferred embodiment, a limiting groove is provided on the inner side wall of the groove, a limiting block is provided on one side of the movable block, and the limiting block is slidably connected in the limiting groove.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The sacrificial anode device for oil well casing is provided with a mounting seat, a mounting hole, a gland, a positioning assembly and a positioning groove. When replacing the anode block, the movable block can be pulled to stretch the tension spring. At the same time, the movable block drives the guide groove to move upward, and the guide groove drives the guide block to slide in the guide groove. The guide block drives the positioning block to be pulled out of the positioning groove, and then the gland is pulled out. Then, the anode block is taken out, and then a new anode block is placed in the mounting hole. The gland is covered, and the tension spring is contracted to drive the positioning block to be inserted into the positioning groove. The gland is then positioned, and the replacement of the anode block is facilitated, and work efficiency is improved.

[0014] The sacrificial anode device for oil well casing facilitates drawing of the movable block by providing the first inwardly concave drawing groove, and facilitates drawing of the gland by providing the second inwardly concave drawing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a structural diagram of the fixing sleeve of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing sleeve of the utility model.

[0018] In the figure: 1. oil pipe; 2. fixing sleeve; 21. mounting seat; 22. mounting hole; 23. pressure cover; 24. groove; 25. positioning assembly; 251. movable block; 252. tension spring; 253. positioning block; 254. guide block; 255. guide groove; 256. first concave groove; 257. limiting block; 26. positioning groove; 27. bolt; 28. second concave groove; 29. ​​limiting groove; 3. anode block. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the embodiments.

[0020] The following examples are intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention based on the concept of the present invention fall within the scope of protection claimed by the present invention.

[0021] See also Figure 1-3 The utility model provides a sacrificial anode device for oil well casing, including an oil pipe 1, a fixed sleeve 2 and an anode block 3. Two symmetrically distributed fixed sleeves 2 are mounted on the surface of the oil pipe 1. Bolts 27 are threadedly connected on both sides of the fixed sleeves 2. The two fixed sleeves 2 are fixedly installed by the bolts 27.

[0022] The surface of the fixed sleeve 2 is provided with a mounting seat 21, and a mounting hole 22 is provided in the middle of the mounting seat 21. The anode block 3 is inserted into the mounting hole 22. A pressure cover 23 is provided at the opening of the mounting hole 22. The mounting seat 21 is provided with grooves 24 on both sides of the mounting hole 22. A positioning component 25 is provided inside the groove 24. A positioning groove 26 is provided on both sides of the pressure cover 23. The positioning component 25 includes a movable block 251, a tension spring 252 and a positioning block 253. The movable block 251 is slidably connected in the groove 24. The tension spring 252 is fixedly connected between the movable block 251 and the inner bottom wall of the groove 24. The positioning block 253 is slidably connected to one side of the movable block 251. The end of the positioning block 253 away from the movable block 251 is provided with a guide angle. The end of the positioning block 253 close to the movable block 251 is fixedly connected with a guide block 254. The movable block 2 A guide groove 255 is provided on one side of 51, and the guide block 254 is slidably connected to the guide groove 255. Through the arrangement of the mounting seat 21, the mounting hole 22, the pressure cover 23, the positioning assembly 25 and the positioning groove 26, when replacing the anode block 3, the movable block 251 can be pulled to make the movable block 251 stretch the tension spring 252. At the same time, the movable block 251 drives the guide groove 255 to move upward, and the guide groove 255 drives the guide block 254 to slide in the guide groove 255. The guide block 254 drives the positioning block 253 to be pulled out from the positioning groove 26, and then the pressure cover 23 is pulled out, and then the anode block 3 is taken out, and then the new anode block 3 is placed in the mounting hole 22, and the pressure cover 23 is covered, so that the tension spring 252 contracts and drives the positioning block 253 to be inserted into the positioning groove 26, and the pressure cover 23 is positioned, which facilitates the replacement of the anode block 3 and improves work efficiency.

[0023] Among them, a first concave groove 256 is opened on the top of the movable block 251. The setting of the first concave groove 256 facilitates the pulling of the movable block 251. A second concave groove 28 is opened on the top of the pressure cover 23. The setting of the second concave groove 28 facilitates the pulling of the pressure cover 23.

[0024] Among them, a limiting groove 29 is opened on the inner side wall of the groove 24, and a limiting block 257 is set on one side of the movable block 251. The limiting block 257 is slidably connected in the limiting groove 29. Through the cooperation between the limiting groove 29 and the limiting block 257, the movable block 251 can be limited.

[0025] The working principle and usage process of the present invention are as follows: first, through the arrangement of the mounting seat 21, the mounting hole 22, the pressure cover 23, the positioning assembly 25 and the positioning groove 26, when replacing the anode block 3, the movable block 251 can be pulled to make the movable block 251 stretch the tension spring 252, and at the same time the movable block 251 drives the guide groove 255 to move upward, and the guide groove 255 drives the guide block 254 to slide in the guide groove 255, and the guide block 254 drives the positioning block 253 to be pulled out from the positioning groove 26, and then the pressure cover 23 is pulled out, and then the anode block 3 is taken out, and then the new anode block 3 is placed in the mounting hole 22, and the pressure cover 23 is covered, so that the tension spring 252 contracts and drives the positioning block 253 to be inserted into the positioning groove 26, and the pressure cover 23 can be positioned, which facilitates the replacement of the anode block 3 and improves work efficiency.

[0026] 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 sacrificial anode device for oil well casing, comprising an oil pipe (1), a fixed sleeve (2) and an anode block (3), characterized in that: The surface of the oil pipe (1) is provided with two symmetrically distributed fixing sleeves (2), the surface of the fixing sleeve (2) is provided with a mounting seat (21), a mounting hole (22) is provided in the middle of the mounting seat (21), the anode block (3) is inserted into the mounting hole (22), a pressure cover (23) is provided at the opening of the mounting hole (22), the mounting seat (21) is provided with grooves (24) on both sides of the mounting hole (22), a positioning assembly (25) is provided inside the groove (24), and positioning grooves (26) are provided on both sides of the pressure cover (23); The positioning assembly (25) comprises a movable block (251), a tension spring (252) and a positioning block (253); the movable block (251) is slidably connected in the groove (24); the tension spring (252) is fixedly connected between the movable block (251) and the inner bottom wall of the groove (24); the positioning block (253) is slidably connected to one side of the movable block (251); one end of the positioning block (253) close to the movable block (251) is fixedly connected to a guide block (254); a guide groove (255) is provided on one side of the movable block (251); and the guide block (254) is slidably connected in the guide groove (255).

2. The sacrificial anode device for oil well casing according to claim 1, characterized in that: Bolts (27) are threadedly connected to both sides of the fixing sleeve (2), and the two fixing sleeves (2) are fixedly installed by the bolts (27).

3. The sacrificial anode device for oil well casing according to claim 1, characterized in that: One end of the positioning block (253) away from the movable block (251) is provided with a guide angle.

4. The sacrificial anode device for oil well casing according to claim 1, characterized in that: A first concave groove (256) is provided on the top of the movable block (251).

5. The sacrificial anode device for oil well casing according to claim 1, characterized in that: A second inwardly concave groove (28) is provided on the top of the pressure cover (23).

6. The sacrificial anode device for oil well casing according to claim 1, characterized in that: A limiting groove (29) is provided on the inner side wall of the groove (24), and a limiting block (257) is provided on one side of the movable block (251), and the limiting block (257) is slidably connected in the limiting groove (29).

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