Well-washing and production-stopping anti-theft device

Abstract

The utility model relates to the technical field of oil well mouth tools, and discloses a well-flushing shut-down well anti-theft device which comprises an anti-theft protection cover, the inner wall of the anti-theft protection cover is fixedly connected with an anti-theft device body, a side-mounted ball valve is arranged on the side face of the center of the anti-theft device body, and a driving assembly is arranged on the outer wall of the anti-theft device body. A vertically-installed ball valve is arranged in the anti-theft device body, a pressure gauge and a valve are arranged on one side of the outer wall of the anti-theft device body, an anti-theft lock pin is arranged on the outer wall of the anti-theft device body, and an oil pipe pup joint is arranged on one side of the anti-theft device body. According to the anti-theft device, the anti-theft body and the oil well bottom flange are connected and fastened through the wellhead bolt, then the connector of the vertically-installed ball valve is connected with the external water pipe, the problems that an existing anti-theft device can only seal a well and does not have the well washing function, and many troubles are brought to oil well recovery operation are solved, and the purposes of increasing the well washing speed and improving the oil well recovery efficiency are achieved. And the re-well and overall operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well wellhead tools, in particular to an anti-theft device for a washable well and a shutdown well. Background Art

[0002] At present, in my country's oil production, some oil wells have stopped production due to reduced production capacity and other reasons. In order to prevent the surrounding oil wells from performing steam and water injection operations to restore the production capacity of the stopped wells and prevent environmental pollution incidents such as oil spills and blowouts, the stopped wells are usually sealed and protected.

[0003] When the production capacity of the shut-down oil well is restored, it is necessary to clean the well and then pump it up and produce it. The existing anti-theft device can only seal the well, but has no well-cleaning function, which brings a lot of trouble to the oil well resumption operation. Therefore, a more advanced and reliable anti-theft device for shut-down wells is needed to improve the oil well development plan. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an anti-theft device for wells that can be flushed and shut down, aiming to improve the problem that the existing anti-theft device can only seal the well but has no well flushing function, which brings a lot of trouble to the oil well resumption operation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-theft device for washable wells and shut-down wells, comprising an anti-theft protective cover, the inner wall of the anti-theft protective cover is fixedly connected to an anti-theft device body, a side-mounted ball valve is arranged on the central side of the anti-theft device body, a driving assembly is arranged on the outer wall of the anti-theft device body, a vertically mounted ball valve is arranged inside the anti-theft device body, a pressure gauge and a valve are arranged on one side of the outer wall of the anti-theft device body, an anti-theft lock pin is arranged on the outer wall of the anti-theft device body, and an oil pipe short circuit is arranged on one side of the anti-theft device body.

[0006] Furthermore, the driving assembly comprises a main body handle, an outer wall of the main body handle is arranged on an outer wall of the anti-theft device body, and the anti-theft lock pin is arranged on one side of the outer wall of the main body handle.

[0007] Furthermore, the oil pipe short circuit, the anti-theft device body and the anti-theft protection cover are all provided with a stainless steel layer inside.

[0008] Furthermore, the side-mounted ball valve is arranged inside the anti-theft protection cover, and the vertical-mounted ball valve is arranged inside the anti-theft protection cover.

[0009] Furthermore, the pressure gauge and the valve are arranged between the anti-theft device body and the anti-theft protection cover.

[0010] Furthermore, the anti-theft lock pin is arranged between the main body handle and the anti-theft device body.

[0011] Furthermore, a wellhead bolt is arranged inside the oil pipe short circuit, and one side of the outer wall of the wellhead bolt is arranged inside the anti-theft device body.

[0012] Furthermore, the oil pipe short circuit is arranged inside the anti-theft protection cover, and the wellhead bolt is arranged inside the anti-theft protection cover.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, firstly, the anti-theft body is connected and fastened to the bottom flange of the oil well by the wellhead bolts, then the joint of the vertical ball valve is connected to the external water pipe, and then the high-pressure water enters the annular space formed by the oil pipe and the well wall of the oil well through the side-mounted ball valve and goes down, which solves the problem that the existing anti-theft device can only seal the well but has no well washing function, which brings a lot of troubles to the oil well resumption operation, and achieves the purpose of accelerating the well washing speed and improving the well resumption and overall operation efficiency.

[0015] 2. In the utility model, firstly, the oil pipe short-circuit, the anti-theft device body and the anti-theft protective cover are all supported by stainless steel, which can improve the effect of resistance to hydrogen sulfide corrosion. Then, the pressure gauge and valve, the main body handle, the anti-theft lock pin and the anti-theft protective cover are combined to achieve a better anti-theft effect. Effective anti-theft measures can avoid the shutdown or reduction of oil wells caused by illegal oil theft, ensure the stable operation of oil wells, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of a washable well and shutdown well anti-theft device proposed by the utility model;

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0019] Legend:

[0020] 1. Oil pipe short-circuit; 2. Wellhead bolt; 3. Anti-theft device body; 4. Side-mounted ball valve; 5. Vertical-mounted ball valve; 6. Pressure gauge and valve; 7. Main body handle; 8. Anti-theft lock pin; 9. Anti-theft protective cover. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1 - Figure 3 The utility model provides an embodiment: an anti-theft device for a washable well and a shut-down well, comprising an anti-theft protection cover 9, the inner wall of which is fixedly connected with an anti-theft device body 3, a side-mounted ball valve 4 is arranged on the central side of the anti-theft device body 3, a driving assembly is arranged on the outer wall of the anti-theft device body 3, a vertical ball valve 5 is arranged inside the anti-theft device body 3, a pressure gauge and a valve 6 are arranged on one side of the outer wall of the anti-theft device body 3, an anti-theft lock pin 8 is arranged on the outer wall of the anti-theft device body 3, an oil pipe short circuit 1 is arranged on one side of the anti-theft device body 3, and the driving assembly comprises a main body handle 7, the outer wall of the main body handle 7 is arranged on the outer wall of the anti-theft device body 3, and the anti-theft lock pin 8 is arranged on one side of the outer wall of the main body handle 7;

[0023] Specifically, first, the high-pressure water hose joint of the well washing vehicle will be accurately connected with the oil joint of the side-mounted ball valve 4 to ensure the stability and smoothness of the water flow. At the same time, the joint of the vertical ball valve 5 is closely connected with the clamp head of the return water hose, and together they construct a complete well washing channel. When the pump truck starts working, high-pressure water will flow along this channel, first entering the annular space formed between the oil well tubing and the well wall through the side-mounted ball valve 4, and going down along this space. At the bottom of the tubing, the high-pressure water will have a strong flushing effect on the well wall and the inner wall of the tubing, effectively cleaning the well. After removing the impurities and dirt attached to it, the cleaned water will then return from the center of the bottom of the oil pipe and rise along the oil pipe all the way to the wellhead. At this time, the return hose will play a role in guiding the well washing fluid at the wellhead to the sewage pipe, ensuring that the wastewater generated during the well washing process can be properly handled to avoid pollution to the environment. When the well washing work is completed, the pressure in the oil well will gradually return to a state equal to the atmospheric pressure. At this time, the value on the pressure gauge will return to zero, and the operator can use special tools to remove the anti-theft device on the oil well to prepare for subsequent oil well operation procedures.

[0024] Reference Figure 1 - Figure 3The oil pipe short circuit 1, the anti-theft device body 3 and the anti-theft protection cover 9 are all provided with a stainless steel layer, the side-mounted ball valve 4 is provided inside the anti-theft protection cover 9, the vertical ball valve 5 is provided inside the anti-theft protection cover 9, the pressure gauge and the valve 6 are provided between the anti-theft device body 3 and the anti-theft protection cover 9, the anti-theft lock pin 8 is provided between the main body handle 7 and the anti-theft device body 3, the oil pipe short circuit 1 is provided with a wellhead bolt 2, one side of the outer wall of the wellhead bolt 2 is provided inside the anti-theft device body 3, the oil pipe short circuit 1 is provided inside the anti-theft protection cover 9, and the wellhead bolt 2 is provided inside the anti-theft protection cover 9;

[0025] Specifically, first connect a certain number of oil pipes one by one and carefully lower them into the well. Next, firmly connect the oil pipe to the oil pipe short circuit 1 in the center of the anti-theft device to ensure the stability and safety of the entire system. Place a complete steel ring between the device and the bottom flange of the wellhead to prevent oil and gas leakage. Then, place the anti-theft device steadily on the wellhead through the traveling carriage to ensure that the 12 bolt holes are aligned for subsequent installation work. Next, install and tighten the 12 wellhead bolts 2. Then use a special wrench to close the side-mounted ball valve 4 and the vertical ball valve 5 to ensure that there will be no oil and gas leakage in subsequent operations. Then manually open the pressure gauge needle valve to put the pressure gauge into working state. In this way, the pressure in the well can be monitored by observing the value changes of the pressure gauge. Next, the anti-theft device will be installed. The protective cover 9 is put on the anti-theft device, and two anti-theft lock pins 8 are used to firmly connect the anti-theft protective cover 9 to the main handle 7, so that the entire anti-theft device is completely enclosed, which plays an anti-theft and anti-destruction role. At this time, the shut-down well can be safely in a shut-down protection state. When the well patrol personnel find that the pressure gauge value of the anti-theft device has increased, they will report it to the operation area dispatch in time to determine whether the shut-down well has restored its production capacity. If it is determined that the well has restored its production capacity, first use special tools to remove the anti-theft protective cover 9, and then perform well washing operations through the side and upper connection ports to remove impurities and oil stains in the well. When the pressure returns to zero, the operating personnel will remove the 12 wellhead bolts 2 and take down the shut-down well anti-theft device. Finally, install the operating wellhead for well repair construction to restore the normal production state of the well.

[0026] Working principle: When it is necessary to use the anti-theft device for washable wells and shut-down wells, first connect a certain number of oil pipes one by one and lower them into the well, then firmly connect them to the oil pipe short circuit 1 in the center of the anti-theft device, place a good steel ring between the device and the bottom flange of the wellhead, sit the anti-theft device on the wellhead through the traveling carriage, align the 12 bolt holes, install and tighten the 12 wellhead bolts 2, close the side-mounted ball valve 4 and the vertical ball valve 5 with a special wrench, open the pressure gauge needle valve by hand, let the pressure gauge be in working condition, then put the anti-theft protective cover 9 on the anti-theft device, and use 2 anti-theft lock pins 8 to lock the anti-theft protective cover 9 with the main body The handle 7 is firmly connected, and the shut-down well can be safely in the shutdown protection state. When the well patrol personnel find that the pressure gauge value of the anti-theft device increases, they will report it to the operation area dispatch in time. The dispatch will notify the relevant technical personnel to analyze the geological and surrounding process measures to determine whether the shut-down well has restored production capacity. When it is determined that the well has restored production capacity, the anti-theft device manager will first remove the anti-theft protection cover 9 using special tools, and then wash the well through the side and upper connection ports. After the pressure returns to zero, the operating personnel will remove the 12 wellhead bolts 2, take down the shut-down well anti-theft device, and install the operating wellhead for well repair construction;

[0027] In addition, when the oil well resumes production capacity and the pressure gauge pointer reaches a certain value, when it is necessary to switch to pumping, the well must be washed first to clean the crude oil and water in the well. When washing the well, the high-pressure water hose joint of the well washing vehicle is connected to the oil joint of the side-mounted ball valve 4, and the joint of the vertically mounted ball valve 5 is connected to the clamp head of the return hose to form a well washing channel. When washing the well, the high-pressure water pumped into the pump truck passes through the side-mounted ball valve 4 into the annular space formed by the oil well tubing and the well wall and goes down, returns from the center of the bottom of the tubing to the wellhead, and recovers the well washing fluid into the sewage pipe through the return hose. After the well washing is completed, the oil well pressure is equal to the atmospheric pressure, and the pressure gauge value returns to zero. At this time, use special tools to remove the anti-theft device and carry out normal oil well operation procedures.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A theft-proof device for a washable well or a shut-down well, comprising an anti-theft protective cover (9), characterized in that: The inner wall of the anti-theft protection cover (9) is fixedly connected to the anti-theft device body (3); a side-mounted ball valve (4) is arranged on the central side of the anti-theft device body (3); a driving component is arranged on the outer wall of the anti-theft device body (3); a vertical ball valve (5) is arranged inside the anti-theft device body (3); a pressure gauge and a valve (6) are arranged on one side of the outer wall of the anti-theft device body (3); an anti-theft lock pin (8) is arranged on the outer wall of the anti-theft device body (3); and an oil pipe short circuit (1) is arranged on one side of the anti-theft device body (3).

2. The anti-theft device for washable wells and shutdown wells according to claim 1 is characterized by: The driving assembly comprises a main body handle (7), the outer wall of the main body handle (7) is arranged on the outer wall of the anti-theft device body (3), and the anti-theft lock pin (8) is arranged on one side of the outer wall of the main body handle (7).

3. The anti-theft device for washable wells and shutdown wells according to claim 1 is characterized by: The oil pipe short circuit (1), the anti-theft device body (3) and the anti-theft protection cover (9) are all provided with a stainless steel layer inside.

4. The anti-theft device for washable wells and shutdown wells according to claim 1 is characterized by: The side-mounted ball valve (4) is arranged inside the anti-theft protection cover (9), and the vertical-mounted ball valve (5) is arranged inside the anti-theft protection cover (9).

5. The anti-theft device for washable wells and shutdown wells according to claim 4 is characterized by: The pressure gauge and the valve (6) are arranged between the anti-theft device body (3) and the anti-theft protection cover (9).

6. The anti-theft device for washable wells and shutdown wells according to claim 2 is characterized by: The anti-theft lock pin (8) is arranged between the main body handle (7) and the anti-theft device main body (3).

7. The anti-theft device for washable wells and shutdown wells according to claim 1 is characterized by: A wellhead bolt (2) is arranged inside the oil pipe short circuit (1), and one side of the outer wall of the wellhead bolt (2) is arranged inside the anti-theft device body (3).

8. The anti-theft device for washable wells and shutdown wells according to claim 7 is characterized by: The oil pipe short circuit (1) is arranged inside the anti-theft protection cover (9), and the wellhead bolt (2) is arranged inside the anti-theft protection cover (9).

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