Oil well mouth integrated scene non-stop production control device

Abstract

The utility model relates to the technical field of oil well oil gas control equipment, in particular to an oil well mouth integration scene non-stop production control device which comprises a main body, the main body comprises an inner pipe and an outer pipe, the inner pipe is sleeved with the outer pipe, a first connector of the inner pipe can be connected with a pipeline outside the outer pipe, and a second connector of the inner pipe is arranged inside the outer pipe. The main body is connected with a first control valve, the first control valve is provided with at least three ports, the inner pipe is connected with the first control valve and connected with the first port of the first control valve, the second port of the first control valve is connected with an outer outlet pipeline, and the outer pipe is provided with an outer inlet. The other end of the outer outlet pipeline is located outside the outer pipe and can be connected with the outer inlet through a pipeline. According to the utility model, interfaces and fluid distribution can be provided for scene application of various instruments, fluids, gases and the like, and various scene operations such as equipment installation, gas collection, carbon dioxide coupon taking and placing and the like can be carried out without stopping production.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well oil and gas control equipment, in particular to an oil wellhead integrated scene non-stop production control device. Background Art

[0002] Oilfield oil well pipelines contain not only flammable and explosive gases, but also harmful gases in some oil well pipelines. According to the working conditions, the wellhead of the oil well needs to be applied in a variety of scenarios, and most scenarios require the oil well pumping unit to be shut down for operation. Some scenarios not only require long construction time but also require on-site fire, and many scenarios require the process on the oil well pipeline to be opened for open loop operation. The long shutdown and construction time of the pumping unit not only affects the normal production of crude oil and reduces the economic benefits of the enterprise, but also increases the safety risk of on-site fire. In addition, the open loop operation of the scenario will cause the leakage of crude oil and harmful gases, which will pollute the environment and cause harm to the human body.

[0003] In response to the above problems, the applicant disclosed an integrated fluid control device for multi-scenario applications and obtained an invention patent authorization with the authorization announcement number CN117948075B. During the production and application of the device, the applicant continuously improved the device to make it more compact, optimized, and more functional. Utility Model Content

[0004] The utility model is an improvement on the prior art, and provides an oil wellhead integrated scene non-stop production control device.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A control device for an oil wellhead integrated scenario without stopping production includes a main body, the main body includes an inner tube and an outer tube, the inner tube is sleeved inside the outer tube, the first interface of the inner tube can be connected to a pipeline outside the outer tube, the second interface of the inner tube is arranged inside the outer tube, the main body is connected to a first control valve, the first control valve is provided with at least three ports, the inner tube is connected to the first control valve, and is connected to the first port of the first control valve, the second port of the first control valve is connected to an external outlet pipeline, the outer tube is provided with an external inlet, the other end of the external outlet pipeline is located outside the outer tube, the first control valve is used to control the fluid to flow directly into the outer tube through the inner tube, or to control the fluid to flow into the outer tube through the external outlet pipeline, an external pipeline and the external inlet, thereby providing multiple flow directions for the fluid to meet the needs of multiple scenario applications at the oil field wellhead.

[0007] The oil wellhead integrated scenario non-stop production control device also includes a second unit, which includes a second control valve, an intermediate pipeline and a conversion cavity. The second control valve is provided with at least three valve ports, the first valve port of the second control valve is connected to the first interface of the inner tube, the second valve port of the second control valve is connected to the intermediate pipeline, and is connected to the conversion cavity through the intermediate pipeline, the outer tube is respectively provided with a first connection port and a second connection port, and the conversion cavity is connected to the first connection port of the outer tube.

[0008] The first connection port of the outer tube is connected to the one-way valve assembly, and the first connection port of the outer tube is connected to the conversion cavity through the one-way valve assembly to ensure one-way flow from the outer tube to the conversion cavity and prevent the fluid from flowing back to the wellhead of the oil well.

[0009] The first control valve may be arranged in a variety of ways:

[0010] First, the first control valve is connected to the second interface of the inner tube.

[0011] One structure is that the first control valve is arranged inside the outer tube, the second connection port of the outer tube is connected to the blind plate, the external outlet pipe passes through the blind plate or the outer tube, and the third port of the first control valve is connected to the inner cavity of the outer tube.

[0012] Another structure is that the second connecting port of the outer tube is connected to the external cavity and communicates with the external cavity, the first control valve is arranged in the external cavity, the third port of the first control valve is communicated with the inner cavity of the external cavity, the first control valve is connected to the second interface of the inner tube through an auxiliary pipe, and the external outlet pipe runs through the external cavity.

[0013] Second, the first control valve is connected to the first interface of the inner tube, the first control valve is arranged outside the outer tube, and the third port of the first control valve is used to connect to the external fluid.

[0014] The first control valve is T-type or L-type.

[0015] The third valve port of the second control valve is connected to the main inlet. When used in an oil field, the main inlet is connected to the crude oil of the oil well, and the conversion cavity is connected to the main outlet.

[0016] The one-flow valve assembly includes a first one-flow valve and a maintenance valve.

[0017] A second check valve is arranged at the outer inlet.

[0018] The beneficial effects achieved by the utility model are:

[0019] The utility model is applied to the wellhead pipeline of oil fields and wells. It is an integrated multi-scenario fluid control device. The utility model can provide interfaces and fluid distribution for various instrument, fluid, gas and other scene applications, and can perform equipment installation, gas collection, carbon dioxide hanging plate removal and other scene operations without stopping production;

[0020] In addition, the utility model has the functions of oil-gas separation, fluid closed-loop conversion, and one-way or two-way circulation.

[0021] The utility model is easy to operate, highly efficient, and has a closed-loop application scenario. In addition, no on-site fire or pipeline restoration is required when installing or removing the equipment, which reduces safety risks while also avoiding leakage of crude oil and harmful gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model (internal circulation mode);

[0024] Figure 2 It is a structural schematic diagram of the first embodiment of the utility model (inside-outside circulation mode);

[0025] Figure 3 It is a structural diagram of the first embodiment of the utility model (second unit circulation mode);

[0026] Figure 4 This is a schematic diagram of the structure of the first embodiment of the utility model (in the application state);

[0027] Figure 5 It is a structural schematic diagram of the first embodiment of the utility model (high-pressure gas collection state);

[0028] Figure 6 It is a structural schematic diagram of the first embodiment of the utility model (low-pressure gas collection state);

[0029] Figure 7 It is a structural schematic diagram of the second embodiment of the utility model (internal circulation mode);

[0030] Figure 8 It is a structural schematic diagram of the second embodiment of the utility model (inside-outside circulation mode);

[0031] Fig. 9 It is a structural diagram of the third embodiment of the utility model (internal circulation mode);

[0032] Fig.10It is a structural schematic diagram of the third embodiment of the utility model (inside-outside circulation mode);

[0033] Fig.11 It is a structural schematic diagram of the fourth embodiment of the utility model (internal circulation mode);

[0034] Fig.12 It is a structural schematic diagram of the fourth embodiment of the utility model (inside-outside circulation mode).

[0035] In the figure: 1. outer pipe; 2. first control valve; 3. inner pipe; 4. main inlet; 5. second control valve; 6. external outlet pipeline; 7. external inlet; 8. check valve assembly; 9. intermediate pipeline; 10. conversion chamber; 11. main outlet; 12. second check valve; 13. temperature gauge; 14. pressure gauge; 15. gas collection device; 16. equipment; 17. carbon dioxide corrosion hanging plate; 18. water injection pump; 19. blind plate; 20. external chamber; 21. auxiliary pipeline. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 6 As shown, a non-stop production control device for an oil wellhead integrated scenario includes a main body, the main body includes an inner tube 3 and an outer tube 1, the inner tube 3 is sleeved inside the outer tube 1, the first interface of the inner tube 3 can be connected to the pipeline outside the outer tube 1, and the second interface of the inner tube 3 is arranged inside the outer tube 1 (in the attached figure, the first interface is located at the lower position of the inner tube 3, and the second interface is located at the top position of the inner tube 3). The structure and connection relationship of the inner tube 3 and the outer tube 1 are similar to the inner and outer tube structures recorded in the background technology CN117948075B. The inner tube 3 is concentrically arranged with the outer tube 1, the second interface of the inner tube 3 is located inside the outer tube 1 and lower than the second connection port of the outer tube 1, and the volume of the outer tube 1 is twice or more than twice the volume of the inner tube 3.

[0039] The main body is connected to a first control valve 2, which is provided with at least three ports. An inner tube 3 is connected to the first control valve 2 and to the first port of the first control valve 2. The second port of the first control valve 2 is connected to an external outlet pipe 6. An external inlet 7 is provided on the outer tube 1. The other end of the external outlet pipe 6 is located outside the outer tube 1 and can be connected to the external inlet 7 through a pipe. The first control valve 2 is used to control the fluid to flow into the outer tube 1 through the inner tube 3, or to control the fluid to flow into the outer tube 1 through the external outlet pipe 6 and the external inlet 7, thereby providing multiple flow directions for the fluid to meet the needs of various application scenarios at the oil field wellhead.

[0040] The oil wellhead integrated scenario non-stop production control device also includes a second unit, which includes a second control valve 5, an intermediate pipeline 9 and a conversion cavity 10. The second control valve 5 is provided with at least three valve ports, the first valve port of the second control valve 5 is connected to the first interface of the inner tube 3, the second valve port of the second control valve 5 is connected to the intermediate pipeline 9, and is connected to the conversion cavity 10 through the intermediate pipeline 9, and the outer tube 1 is respectively provided with a first connection port and a second connection port (in the attached figure, the first connection port is located at the lower position of the outer tube 1, and the second connection port is located at the top position of the outer tube 1), and the conversion cavity 10 is connected to the first connection port of the outer tube 1. The above-mentioned second unit provides more flow directions for the fluid. The third valve port of the second control valve 5 is connected to the main inlet 4. When used in the oil field, the main inlet 4 is connected to the crude oil of the oil well, and the conversion cavity 10 is connected to the main outlet 11.

[0041] The first connection port of the outer tube 1 is connected to the check valve assembly 8, and the first connection port of the outer tube 1 is connected to the conversion cavity 10 through the check valve assembly 8, ensuring one-way flow from the outer tube 1 to the conversion cavity 10, and preventing the fluid from flowing back to the wellhead of the oil well. The check valve assembly 8 includes a first check valve and a maintenance valve.

[0042] A second check valve 12 is provided at the external inlet 7 .

[0043] In the above structure, the first control valve 2 and the second control valve 5 are both three-way valves. The first control valve 2 is T-shaped.

[0044] The first control valve 2 is connected to the second interface of the inner tube 3. Specifically, the first control valve 2 is arranged inside the outer tube 1, and the second connection port of the outer tube 1 is connected to the blind plate 19. The outer outlet pipe 6 is arranged to penetrate the blind plate 19, and the third port of the first control valve 2 is connected to the inner cavity of the outer tube 1.

[0045] The conversion chamber 10 can also be connected to a water injection pump 18 via a pipeline to perform water injection operations to meet on-site needs.

[0046] The application of the utility model is illustrated by the following multiple scenarios:

[0047] Scenario 1: Install equipment without stopping production 16:

[0048] The application background is: various equipment 16 need to be installed at the wellhead of the oil field. The commonly used installation method is to stop the oil well pumping unit, cut and disconnect the pipeline, weld the flange, and then connect the equipment 16 to the pipeline with the flange. Since the installation of equipment 16 requires hot work, and involves many workflow nodes, the process safety risk is high and the operation time is low. Each construction takes about 4 to 5 hours and consumes up to 7 people (five construction workers and one person each for Party A and Party B to monitor), which does not match the development requirements of fast and safe construction in the oil field. After the equipment 16 is removed, the pipeline needs to be restored. In addition, due to the limitations of the well site environment, the equipment 16 currently installed at the wellhead is limited in quantity, size and direction.

[0049] The utility model installs the equipment 16: The utility model installs the equipment 16 without stopping production and without using fire. After the equipment 16 is removed, the pipeline does not need to be restored, and multiple equipment 16 in different directions can be installed at the same time. The device installs the equipment 16 in a closed loop, and no leakage of crude oil and harmful gases will occur. Since the equipment 16 is easy to install and does not require stopping production and using fire, it not only does not affect the normal production of the enterprise and reduces safety risks, but also improves installation efficiency and reduces labor intensity, and also reduces crude oil pollution and harmful gases. Harm to the human body.

[0050] Figure 1 and Figure 4 It is a schematic diagram of the fluid state before and after the installation device 16 of the utility model. Figure 1 Schematic diagram of the fluid state of the utility model before the device 16 is installed. At this time, the control device is in the internal flow mode, and the fluid enters the outer tube 1 through the third port of the first control valve 2 and flows out from the conversion cavity 10 and the main outlet 11; Figure 4 This is a schematic diagram of the fluid state of the utility model after the device 16 is installed. At this time, the utility model is in the internal and external circulation mode. The fluid flows out from the external outlet pipe 6 through the second port of the first control valve 2, returns to the outer pipe 1 through the external inlet 7 after passing through the device 16, and flows out from the conversion cavity 10 and the main outlet 11.

[0051] The installation process of the device 16 is as follows: first, connect the device 16 between the external outlet pipe 6 and the external inlet 7 of the utility model, and then change the first control valve 2 from the internal flow mode ( Figure 1 Switch to internal and external circulation mode ( Figure 2 as shown).

[0052] Scenario 2: Remove and place carbon dioxide corrosion coupon 17 without stopping production:

[0053] Application background: Carbon dioxide in crude oil corrodes the pumps, pipes, and rods of oil wells. It is necessary to place metal coupons in crude oil to detect the degree of carbon dioxide corrosion. The commonly used method is to make a movable bracket in the oil nozzle sleeve at the oil well mouth to place the corrosion coupon, and then take it out for inspection after a period of time. The oil nozzle sleeve is sealed by a plug, and a temperature and pressure instrument and a probe are installed on the plug. When placing or removing the coupon, first stop the pumping machine, remove the instrument and probe, and then remove the plug. Each time the corrosion coupon is placed or removed, production needs to be stopped for about 1.5 hours, which not only affects the low efficiency of crude oil production but also increases labor costs.

[0054] The utility model does not need to stop production when taking out and placing the corrosion hanging piece, and the placement or taking out is fast and convenient, and only takes about five minutes, does not affect the production efficiency and is pollution-free, reduces labor intensity, reduces costs and increases efficiency.

[0055] The installation process of the carbon dioxide corrosion hanging piece 17 is as follows: the outer tube 1 is provided with a plurality of instrument interfaces and hanging piece access ports. When installing, first switch the second control valve 5 to switch the utility model to the second unit flow mode ( Figure 3 As shown in the figure, the fluid directly flows through the main inlet 4, the second control valve 5, the intermediate pipeline 9, the conversion chamber 10 and the main outlet 11, and does not enter the inner tube 3 and the outer tube 1. At this time, the carbon dioxide corrosion hanging plate 17 can be installed at the hanging plate access port.

[0056] like Figure 4 As shown, multiple instrument interfaces can be used to connect instruments such as a temperature gauge 13 and a pressure gauge 14, and the above-mentioned operation method can be used for quick installation during installation.

[0057] Scenario 3: High and low pressure gas collection:

[0058] like Figure 5 , Figure 6 As shown, the outer tube 1 is also connected to a gas collection device 15 for collecting the gas released from the fluid, thereby facilitating the detection of the gas.

[0059] This scenario can perform two types of gas collection at different pressures: upper and lower unit circulation mode gas collection, and lower unit circulation mode gas collection.

[0060] 1. Gas collection in upper and lower unit flow mode: Figure 5 As shown, in this mode, the gas pressure collected by the gas collection device 15 is the same as the crude oil pressure. In this mode, the gas pressure is higher.

[0061] 2. Gas collection in lower unit flow mode: Figure 6 As shown, in this mode, the pressure of the gas collected by the gas collection device 15 gradually decreases as the gas in the outer tube 1 decreases, and gas collection can be performed at this time. Figure 5 , Figure 6The dotted line in the figure indicates the oil-gas interface.

[0062] Embodiment 2:

[0063] This embodiment is basically the same as the first embodiment, except that Figure 7 , Figure 8 As shown, the first control valve 2 is L-shaped, and the external outlet pipe 6 is arranged through the external pipe 1. Figure 7 The fluid direction in is the internal flow mode. Figure 8 The fluid direction in is the inside-outside flow mode.

[0064] The structure of this embodiment can also be applied to multiple scenarios described in the first embodiment.

[0065] Embodiment three:

[0066] This embodiment is basically the same as the first embodiment, except that Fig. 9 , Fig.10 As shown, the second connection port of the outer tube 1 is connected to the external cavity 20 through a flange or other structure and communicates with the external cavity 20, the first control valve 2 is arranged in the external cavity 20, the third port of the first control valve 2 is communicated with the inner cavity of the external cavity 20, the first control valve 2 is connected to the second interface of the inner tube 3 through an auxiliary pipe 21, the auxiliary pipe 21 is sleeved with the inner tube 3 through a sealing ring, and the external outlet pipe 6 is arranged through the external cavity 20. Among them, Fig. 9 The fluid direction in is the internal flow mode. Fig.10 The fluid direction in is the inside-outside flow mode.

[0067] The structure of this embodiment can also be applied to multiple scenarios described in the first embodiment.

[0068] Embodiment 4:

[0069] This embodiment is basically the same as the first embodiment, except that Fig.11 , Fig.12 As shown, the first control valve 2 is connected to the first interface of the inner tube 3, the first control valve 2 is arranged outside the outer tube 1, and the third port of the first control valve 2 is connected to the second control valve 5 for connecting the fluid introduced by the second control valve 5. Fig.11 The fluid direction in is the internal flow mode. Fig.12 The flow direction in is the outward flow mode.

[0070] The structure of this embodiment can also be applied to multiple scenarios described in the first embodiment.

Claims

1. An oil wellhead integrated scenario non-stop production control device, comprising a main body, the main body comprising an inner tube (3) and an outer tube (1), the inner tube (3) being sleeved inside the outer tube (1), the first interface of the inner tube (3) being able to be connected to a pipeline outside the outer tube (1), the second interface of the inner tube (3) being arranged inside the outer tube (1), characterized in that: The main body is connected to a first control valve (2), the first control valve (2) being provided with at least three ports, the inner tube (3) being connected to the first control valve (2) and being connected to the first port of the first control valve (2), the second port of the first control valve (2) being connected to an external outlet pipe (6), the outer tube (1) being provided with an external inlet (7), the other end of the external outlet pipe (6) being located outside the outer tube (1), the first control valve (2) being used to control the fluid to flow directly into the interior of the outer tube (1) through the inner tube (3), or to control the fluid to flow into the interior of the outer tube (1) through the external outlet pipe (6), an external pipeline and the external inlet (7).

2. The oil wellhead integrated scenario non-stop production control device according to claim 1 is characterized in that: The invention also comprises a second unit, the second unit comprising a second control valve (5), an intermediate pipeline (9) and a conversion chamber (10), the second control valve (5) being provided with at least three valve ports, the first valve port of the second control valve (5) being connected to the first interface of the inner tube (3), the second valve port of the second control valve (5) being connected to the intermediate pipeline (9), and being connected to the conversion chamber (10) via the intermediate pipeline (9), the outer tube (1) being provided with a first connection port and a second connection port, respectively, and the conversion chamber (10) being connected to the first connection port of the outer tube (1).

3. The oil wellhead integrated scenario non-stop production control device according to claim 2 is characterized in that: The first connection port of the outer tube (1) is connected to the check valve assembly (8), and the first connection port of the outer tube (1) is connected to the conversion chamber (10) via the check valve assembly (8), thereby ensuring one-way flow from the outer tube (1) to the conversion chamber (10).

4. The oil wellhead integrated scenario non-stop production control device according to claim 1 or 2, characterized in that: The first control valve (2) is connected to the second interface of the inner tube (3).

5. The oil wellhead integrated scenario non-stop production control device according to claim 4 is characterized in that: The first control valve (2) is arranged inside the outer tube (1); the second connection port of the outer tube (1) is connected to the blind plate (19); the outer outlet pipe (6) passes through the blind plate (19) or the outer tube (1); and the third opening of the first control valve (2) is in communication with the inner cavity of the outer tube (1).

6. The oil wellhead integrated scene non-stop production control device according to claim 4 is characterized in that: The second connection port of the outer tube (1) is connected to the external cavity (20) and communicates with the external cavity (20); the first control valve (2) is arranged in the external cavity (20); the third port of the first control valve (2) is communicated with the inner cavity of the external cavity (20); the first control valve (2) is connected to the second interface of the inner tube (3) via an auxiliary pipeline (21); and the external outlet pipeline (6) is arranged to penetrate the external cavity (20).

7. The oil wellhead integrated scenario non-stop production control device according to claim 1 or 2, characterized in that: The first control valve (2) is connected to a first interface of the inner tube (3); the first control valve (2) is arranged outside the outer tube (1); and a third port of the first control valve (2) is used to connect to an external fluid.

8. The oil wellhead integrated scenario non-stop production control device according to claim 1 is characterized in that: The first control valve (2) is T-type or L-type.

9. The oil wellhead integrated scenario non-stop production control device according to claim 3 is characterized in that: The third valve port of the second control valve (5) is connected to the main inlet (4), and the conversion chamber (10) is connected to the main outlet (11); The one-flow valve assembly (8) comprises a first one-flow valve and a maintenance valve.

10. The oil wellhead integrated scenario non-stop production control device according to claim 1, characterized in that: A second check valve (12) is provided at the external inlet (7).

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