Anti-freezing water injection wellhead device for petroleum drilling and production

Abstract

The utility model relates to the technical field of water injection wellhead devices, in particular to an anti-freezing type water injection wellhead device for petroleum drilling and production, which comprises a first oil pipe, a second oil pipe, an inner liner and a heat insulation coating, the second oil pipe is arranged at the upper end of the first oil pipe, and the top of the first oil pipe is connected with a first flange plate B; a first flange plate A is connected to the bottom of the second oil pipe, an elbow joint is arranged at the upper end of the second oil pipe, a second flange plate A is connected to the bottom of the elbow joint, a second flange plate B is connected to the top of the second oil pipe, and a third flange plate is connected to one side of the elbow joint. The water injection well head device is provided with a structure for performing anti-freezing protection on the water injection well head device, so that the phenomenon of frost crack of parts in the water injection well head device is prevented, the maintenance and replacement cost is saved, and the water injection well head device can work normally.

Description

Technical Field

[0001] The utility model relates to the technical field of water injection wellhead devices, in particular to a water injection wellhead device used in an antifreeze type petroleum drill. Background Art

[0002] During the oil drilling process, the water injection wellhead device is an important component of the water injection well. It mainly plays the role of hanging the oil pipe in the well and supporting the weight of the oil pipe column in the well, ensuring that the oil pipe is stably and safely suspended at the wellhead. The water injection wellhead device is equipped with components such as oil pipes, valves and flanges. These components are easily brittle due to freezing in a low temperature environment, and may crack or deform due to freezing.

[0003] At present, during the use of water injection wellhead devices, there is a lack of structure to protect the water injection wellhead devices from freezing. The water injection wellhead devices are prone to freezing and cracking, which increases the cost of maintenance and replacement and causes the water injection wellhead devices to fail to work normally. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a water injection wellhead device for an antifreeze type oil drill. The utility model has a structure for antifreeze protection of the water injection wellhead device, preventing the components in the water injection wellhead device from freezing and cracking, saving maintenance and replacement costs, and allowing the water injection wellhead device to work normally.

[0005] The technical solution adopted by the utility model to solve the technical problem is a water injection wellhead device for an antifreeze type oil drill, comprising a No. 1 oil pipe, a No. 2 oil pipe, an inner liner and a heat insulation coating, wherein the upper end of the No. 1 oil pipe is provided with a No. 2 oil pipe, the top of the No. 1 oil pipe is connected with a No. 1 flange B, the bottom of the No. 2 oil pipe is connected with a No. 1 flange A, the upper end of the No. 2 oil pipe is provided with an elbow joint, the bottom of the elbow joint is connected with a No. 2 flange A, the top of the No. 2 oil pipe is connected with a No. 2 flange B, and one side of the elbow joint is connected with a No. 3 flange;

[0006] The interiors of the No. 1 oil pipe and the No. 2 oil pipe are both installed with inner liners by opening installation cavities, and the inner liners are made of asbestos material. The surfaces of the No. 1 oil pipe and the No. 2 oil pipe are coated with heat insulation coatings. A support seat is provided at the bottom of the No. 1 oil pipe, and a hot air blower is installed on one side of the support seat. Sealing gaskets are provided between the No. 1 flange A and No. 1 flange B and the No. 2 flange A and No. 2 flange B.

[0007] By adopting the above technical solution, personnel open an installation cavity inside the No. 1 oil pipe and the No. 2 oil pipe, and embed the inner liner made of asbestos material inside the No. 1 oil pipe and the No. 2 oil pipe, so that the inner liner can prevent the cold air outside the No. 1 oil pipe and the No. 2 oil pipe from penetrating into the interior of the No. 1 oil pipe and the No. 2 oil pipe;

[0008] Personnel placed the sealing gasket between flange No. 1 A and flange No. 1 B and between flange No. 2 A and flange No. 2 B. The sealing gasket made of silicone rubber material is soft in texture and has good fit. It can fit tightly with flange No. 1 A and flange No. 1 B and flange No. 2 A and flange No. 2 B to enhance the sealing.

[0009] Specifically, the outer sides of the No. 1 flange A and the No. 2 flange A are provided with fastening bolts, the outer sides of the No. 1 flange B and the No. 2 flange B are provided with fastening nuts, and the insides of the No. 1 flange A, No. 1 flange B, No. 2 flange A, No. 2 flange B, No. 3 flange and sealing gaskets are provided with bolt holes.

[0010] By adopting the above technical solution, flange No. 1 A and flange No. 1 B and flange No. 2 A and flange No. 2 B can be fastened and connected by tightening bolts, tightening nuts and bolt holes, and flange No. 3 on one side of the elbow joint is convenient for changing the direction of the pipeline or connecting pipelines in different directions.

[0011] Specifically, the two sides of the No. 2 oil pipe are respectively connected to the No. 1 bypass pipe and the No. 2 bypass pipe, and one side of the No. 1 bypass pipe and the No. 2 bypass pipe is provided with an oil pipe valve.

[0012] Specifically, the sealing gasket is made of silicone rubber material.

[0013] Specifically, the hot air blower is connected to the support base via a mounting plate.

[0014] Specifically, the thermal insulation coating is made by spraying insulating conductive thermal insulation paint.

[0015] By adopting the above technical solution, the thermal insulation coating can effectively prevent the cold air outside the No. 1 oil pipe and the No. 2 oil pipe from penetrating into the interior of the No. 1 oil pipe and the No. 2 oil pipe.

[0016] Beneficial effects of the utility model:

[0017] (1) The antifreeze type oil drill described in the utility model adopts a water injection wellhead device, and the inner liner is embedded in the inside of the No. 1 oil pipe and the No. 2 oil pipe, so that the inner liner can effectively prevent the cold air outside the No. 1 oil pipe and the No. 2 oil pipe from penetrating into the inside of the No. 1 oil pipe and the No. 2 oil pipe.

[0018] (2) The antifreeze type oil drill described in the utility model adopts a water injection wellhead device, and a hot air blower can apply hot air to the wellhead to prevent freezing.

[0019] (3) The antifreeze type oil drill described in the utility model adopts a water injection wellhead device, and the sealing gasket can fit tightly with the No. 1 flange A and the No. 1 flange B and the No. 2 flange A and the No. 2 flange B to enhance the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the No. 1 oil pipe of the utility model;

[0023] Figure 3 It is an exploded view of the utility model.

[0024] In the figure: 1. Oil pipe No. 1; 2. Oil pipe No. 2; 3. Flange No. 1 A; 4. Flange No. 1 B; 5. Elbow joint; 6. Flange No. 2 A; 7. Flange No. 2 B; 8. Bypass pipe No. 1; 9. Bypass pipe No. 2; 10. Oil pipe valve; 11. Support seat; 12. Fastening bolts; 13. Fastening nuts; 14. Inner liner; 15. Thermal insulation coating; 16. Flange No. 3; 17. Sealing gasket; 18. Bolt hole; 19. Mounting plate; 20. Hot air blower. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] In order to prevent the components in the water injection wellhead device from freezing and cracking, save the cost of maintenance and replacement, and enable the water injection wellhead device to work normally, such as Figure 1-3 As shown, the utility model discloses an antifreeze type oil drill adopting a water injection wellhead device, comprising a No. 1 oil pipe 1, a No. 2 oil pipe 2, an inner liner 14 and a heat insulation coating 15, wherein the upper end of the No. 1 oil pipe 1 is provided with a No. 2 oil pipe 2, the top of the No. 1 oil pipe 1 is connected with a No. 1 flange B4, the bottom of the No. 2 oil pipe 2 is connected with a No. 1 flange A3, the upper end of the No. 2 oil pipe 2 is provided with an elbow joint 5, the bottom of the elbow joint 5 is connected with a No. 2 flange A6, the top of the No. 2 oil pipe 2 is connected with a No. 2 flange B7, and one side of the elbow joint 5 is connected with a No. 3 flange 16;

[0027] The interiors of the No. 1 oil pipe 1 and the No. 2 oil pipe 2 are both installed with inner liners 14 by opening installation cavities, and the inner liners 14 are made of asbestos material. The surfaces of the No. 1 oil pipe 1 and the No. 2 oil pipe 2 are coated with heat insulation coatings 15. A support seat 11 is provided at the bottom of the No. 1 oil pipe 1, and a hot air blower 20 is installed on one side of the support seat 11. Sealing gaskets 17 are provided between the No. 1 flange A3 and the No. 1 flange B4 and the No. 2 flange A6 and the No. 2 flange B7.

[0028] When in use, the inner liner 14 can effectively prevent the cold air outside the No. 1 oil pipe 1 and the No. 2 oil pipe 2 from penetrating into the interior of the No. 1 oil pipe 1 and the No. 2 oil pipe 2;

[0029] The sealing gasket 17 can fit tightly with the No. 1 flange A3 and the No. 1 flange B4 and the No. 2 flange A6 and the No. 2 flange B7 to enhance the sealing performance.

[0030] For example, Figure 1 Figure 3 As shown, the outer sides of the No. 1 flange A3 and the No. 2 flange A6 are provided with fastening bolts 12, the outer sides of the No. 1 flange B4 and the No. 2 flange B7 are provided with fastening nuts 13, and the interiors of the No. 1 flange A3, the No. 1 flange B4, the No. 2 flange A6, the No. 2 flange B7, the No. 3 flange 16 and the sealing gasket 17 are provided with bolt holes 18.

[0031] When in use, by tightening bolts 12, tightening nuts 13 and bolt holes 18, No. 1 flange A3 and No. 1 flange B4 and No. 2 flange A6 and No. 2 flange B7 can be tightened and connected. No. 3 flange 16 on one side of the elbow joint 5 is convenient for changing the direction of the pipeline or connecting pipelines in different directions.

[0032] For example, Figure 1 , Figure 3 As shown, the two sides of the No. 2 oil pipe 2 are respectively connected to a No. 1 bypass pipe 8 and a No. 2 bypass pipe 9 , and one side of the No. 1 bypass pipe 8 and the No. 2 bypass pipe 9 are both provided with an oil pipe valve 10 .

[0033] When in use, the bypass pipe allows the equipment to continue running during maintenance or replacement, and the oil pipe valve can control the opening and closing of the oil pipe, thereby regulating and controlling the oil flow.

[0034] For example, Figure 3 As shown, the sealing gasket 17 is made of silicone rubber material.

[0035] When in use, the sealing gasket 17 made of silicone rubber material is soft and has good fit.

[0036] For example, Figure 1 , Figure 3 As shown, the hot air blower 20 is connected to the support base 11 through the mounting plate 19 .

[0037] When in use, the hot air blower 20 can apply hot air to the area around the wellhead to prevent freezing.

[0038] For example, Figure 1 , Figure 2 , Figure 3 As shown, the thermal insulation coating 15 is made by spraying insulating conductive thermal insulation paint.

[0039] When in use, the heat-insulating coating 15 can effectively prevent cold air outside the No. 1 oil pipe 1 and the No. 2 oil pipe 2 from penetrating into the interior of the No. 1 oil pipe 1 and the No. 2 oil pipe 2 .

[0040] When the utility model is used, when the water injection wellhead device is used, the personnel open the installation cavity inside the No. 1 oil pipe 1 and the No. 2 oil pipe 2, and embed the inner liner 14 made of asbestos material inside the No. 1 oil pipe 1 and the No. 2 oil pipe 2, so that the inner liner 14 can effectively prevent the cold air outside the No. 1 oil pipe 1 and the No. 2 oil pipe 2 from penetrating into the inside of the No. 1 oil pipe 1 and the No. 2 oil pipe 2;

[0041] The hot air blower 20 can apply hot air around the wellhead to prevent freezing;

[0042] Personnel placed the sealing gasket 17 between the No. 1 flange A3 and the No. 1 flange B4 and between the No. 2 flange A6 and the No. 2 flange B7. The sealing gasket 17 made of silicone rubber material is soft in texture and has good fit. It can fit tightly with the No. 1 flange A3 and the No. 1 flange B4 and the No. 2 flange A6 and the No. 2 flange B7 to enhance the sealing.

[0043] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A water injection wellhead device for antifreeze oil drilling, characterized in that: It comprises a No. 1 oil pipe (1), a No. 2 oil pipe (2), an inner liner (14) and a heat-insulating coating (15), wherein the No. 2 oil pipe (2) is arranged at the upper end of the No. 1 oil pipe (1), the top of the No. 1 oil pipe (1) is connected to a No. 1 flange B (4), the bottom of the No. 2 oil pipe (2) is connected to a No. 1 flange A (3), the upper end of the No. 2 oil pipe (2) is arranged to have a elbow joint (5), the bottom of the elbow joint (5) is connected to a No. 2 flange A (6), the top of the No. 2 oil pipe (2) is connected to a No. 2 flange B (7), and one side of the elbow joint (5) is connected to a No. 3 flange (16); The interior of the No. 1 oil pipe (1) and the No. 2 oil pipe (2) are both installed with inner liners (14) by opening an installation cavity, and the inner liners (14) are made of asbestos material. The surfaces of the No. 1 oil pipe (1) and the No. 2 oil pipe (2) are both coated with a heat insulation coating (15). A support seat (11) is provided at the bottom of the No. 1 oil pipe (1), and a hot air blower (20) is installed on one side of the support seat (11). Sealing gaskets (17) are provided between the No. 1 flange A (3) and the No. 1 flange B (4) and the No. 2 flange A (6) and the No. 2 flange B (7).

2. The antifreeze type oil drilling water injection wellhead device according to claim 1 is characterized in that: The outer sides of the No. 1 flange A (3) and the No. 2 flange A (6) are provided with fastening bolts (12), the outer sides of the No. 1 flange B (4) and the No. 2 flange B (7) are provided with fastening nuts (13), and the interiors of the No. 1 flange A (3), the No. 1 flange B (4), the No. 2 flange A (6), the No. 2 flange B (7), the No. 3 flange (16) and the sealing gasket (17) are provided with bolt holes (18).

3. The antifreeze type oil drilling water injection wellhead device according to claim 1 is characterized in that: The two sides of the No. 2 oil pipe (2) are respectively connected to a No. 1 bypass pipe (8) and a No. 2 bypass pipe (9), and one side of each of the No. 1 bypass pipe (8) and the No. 2 bypass pipe (9) is provided with an oil pipe valve (10).

4. The antifreeze type oil drilling water injection wellhead device according to claim 1 is characterized in that: The sealing gasket (17) is made of silicone rubber material.

5. The antifreeze type oil drilling water injection wellhead device according to claim 1 is characterized in that: The hot air blower (20) is connected to the support base (11) via a mounting plate (19).

6. The antifreeze type oil drilling water injection wellhead device according to claim 1 is characterized in that: The heat-insulating coating (15) is made by spraying insulating conductive heat-insulating paint.

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