Pumping well liquid collection box with oil-water separation function

Abstract

The invention relates to the technical field of oil exploitation, in particular to a pumping well liquid collecting box with an oil-water separation function, which comprises a main body, and the top of the main body is fixedly connected with an oil-water collecting and discharging assembly; by using the oil-water separation plate and the cyclone separator, oil and water can be effectively separated, the liquid collection efficiency is improved, separated oil and water can be discharged through independent outlets, the complexity and cost of a subsequent treatment process are reduced, the upper part of the liquid collection box is used as an oil collection area, the separated oil is discharged through an oil outlet, and the oil collection efficiency is improved. The lower portion of the liquid collecting box is a water collecting area, separated water is discharged through the water outlet, the oil outlet and the water outlet are provided with valves, discharging can be controlled according to needs, the cyclone separator is arranged, oil and water are further separated through centrifugal force, an inlet of the cyclone separator is connected with the liquid inlet, and an outlet of the cyclone separator is connected to the oil collecting area and the water collecting area. The liquid collecting box is simple in structure, convenient to operate and suitable for various pumping well environments.

Description

Technical Field

[0001] The invention relates to the technical field of oil extraction, in particular to an oil well liquid collecting box with an oil-water separation function. Background Art

[0002] During oil extraction, the pumping well fluid collection box is a crucial piece of equipment for collecting crude oil. However, because underground crude oil often contains a certain amount of water, the liquid collected in the collection box is an oil-water mixture. A specialized tool is connected to a wire rope and, powered by a well-draining rig, lowered into the downhole oil pipeline via a ground block, derrick overhead crane, blowout preventer, and blowout preventer. Once the pumping unit enters the liquid below the liquid level, the check valve on the pumping unit automatically opens under the influence of the wellbore liquid, allowing liquid to enter the upper portion of the pumping unit. When the pumping unit is lifted, the check valve automatically closes under the influence of the liquid column, and the pumping unit rubber expands under the pressure of the liquid column, sealing the channel in the oil pipeline. The wellbore liquid is discharged to the surface as the pumping unit ascends.

[0003] Due to the existence of underground pressure, if underground pressure is not controlled during oilfield production, it is very easy to cause sluices and blowouts, which will bring great safety hazards to the oil and gas field production process. Therefore, in order to improve the safety and effectiveness of oilfield production, it is necessary to carefully analyze the existing problems of well control in oilfield downhole operations, conduct in-depth analysis of the causes of sluices and blowouts in oilfield downhole operations, and formulate corresponding countermeasures to fundamentally improve the safety of oilfield production.

[0004] Traditional liquid collection boxes cannot effectively separate oil and water and require subsequent treatment processes for separation, which not only increases treatment costs but may also cause environmental pollution. Therefore, an oil well liquid collection box with oil-water separation function is needed to improve the above problems. Summary of the Invention

[0005] In order to solve the problem that traditional liquid collecting boxes cannot effectively separate oil and water, subsequent processing processes are required for separation, which not only increases processing costs but may also cause environmental pollution. The purpose of the present invention is to provide an oil well liquid collecting box with oil-water separation function to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An oil well liquid collecting box with an oil-water separation function comprises a main body, the top of which is fixedly connected to an oil-water collecting and discharging assembly;

[0008] The main body comprises a liquid collecting box body, an oil-water separation plate is fixedly connected to the interior of the liquid collecting box body, and micropores are opened in the interior of the oil-water separation plate;

[0009] The oil-water collecting and discharging assembly comprises an output pipe, a cyclone separator is installed at the bottom of the output pipe, and the output end of the cyclone separator is fixedly connected to the extension pipe.

[0010] As a preferred solution of the present invention, it also includes a liquid level monitoring component, wherein an oil level sensor and a water level sensor are respectively installed on the outside of the liquid collecting box body, and the oil level sensor and the water level sensor are respectively connected to the oil collection area and the water collection area in the liquid collecting box body, for real-time monitoring of the oil and water liquid level heights; a controller is installed on the top of the output pipe, and the controller is electrically connected to the oil level sensor, the water level sensor and the solenoid valves of the oil outlet and the water outlet, and can automatically control the opening and closing of the valves according to the liquid level data.

[0011] As a preferred solution of the present invention, it also includes a pressure balancing device, a breathing hole is opened on the top of the liquid collecting box body, and a pressure valve is installed in the breathing hole. When the pressure in the liquid collecting box body exceeds the set threshold, the pressure valve automatically opens to release the pressure; a dust filter is provided on the outside of the breathing hole to prevent external impurities from entering the interior of the liquid collecting box body.

[0012] As a preferred solution of the present invention, a plurality of microholes are provided, and the extension tube extends to the interior of the liquid collecting box body.

[0013] As a preferred solution of the present invention, an oil outlet is provided at the bottom of the liquid collecting box body, and a water outlet is provided at the bottom of the liquid collecting box body.

[0014] As a preferred solution of the present invention, the inlet of the cyclone separator is a tangential inlet, and the outlet is connected to the oil collection area and the water collection area respectively.

[0015] As a preferred solution of the present invention, the oil outlet and the water outlet are both equipped with on-off valves.

[0016] As a preferred solution of the present invention, a liquid inlet is provided on the top of the liquid collecting box body, and a rubber sealing strip is fixedly connected to the interior of the liquid collecting box body.

[0017] As a preferred solution of the present invention, a valve is fixedly connected to the top of the output pipe, and an oil drainer is provided on the top of the output pipe.

[0018] As a preferred solution of the present invention, the oil-water separation plate is made of stainless steel, and the surface is specially treated.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, by utilizing the oil-water separation plate and the cyclone separator, the oil and water can be effectively separated, the liquid collection efficiency is improved, and the separated oil and water can be discharged through independent outlets, reducing the complexity and cost of the subsequent treatment process. The liquid collection box body is a sealed container with a liquid inlet on the top for receiving the oil-water mixture discharged from the oil pumping well. The bottom of the liquid collection box is provided with two independent outlets, one for oil and the other for water. An oil-water separation plate is arranged inside the liquid collection box. The separation plate is located below the liquid inlet and divides the interior of the liquid collection box into two left and right areas. A plurality of micropores are provided on the separation plate. The pore size can allow water to pass through and intercept oil droplets, thereby realizing the preliminary separation of oil and water.

[0021] 2. In the present invention, the upper part of the liquid collecting box is used as the oil collection area, and the separated oil is discharged through the oil outlet. The lower part of the liquid collecting box is used as the water collection area, and the separated water is discharged through the water outlet. Both the oil outlet and the water outlet are equipped with valves, and the discharge can be controlled as needed. A cyclone separator is provided to further separate the oil and water by centrifugal force. The inlet of the cyclone separator is connected to the liquid inlet, and the outlet is connected to the oil collection area and the water collection area respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic structural diagram of the oil-water separation plate of the present invention;

[0024] Figure 3 This is a schematic diagram of the bottom assembly structure of the present invention;

[0025] Figure 4 It is a schematic structural diagram of the oil-water collection and discharge component of the present invention.

[0026] In the figure: 1. Main body; 101. Liquid collecting box body; 102. Rubber sealing strip; 103. Oil-water separation plate; 104. Micropores; 105. Oil outlet; 106. Water outlet; 107. Liquid inlet; 2. Oil-water collection and discharge assembly; 201. Output pipe; 202. Oil drainer; 203. Valve; 204. Cyclone separator; 205. Extension pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] For examples, see Figures 1-4 , the present invention provides a technical solution:

[0029] The oil well liquid collecting box with oil-water separation function comprises a main body 1, and the top of the main body 1 is fixedly connected with an oil-water collecting and discharging component 2.

[0030] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, the main body 1 includes a liquid collecting box body 101, an oil-water separation plate 103 is fixedly connected to the interior of the liquid collecting box body 101, and micropores 104 are opened inside the oil-water separation plate 103. The oil-water collecting and discharging component 2 includes an output pipe 201, and a cyclone separator 204 is installed at the bottom of the output pipe 201. The output end of the cyclone separator 204 is fixedly connected to the extension pipe 205. The oil-water separation plate 103 and the cyclone separator 204 can effectively separate oil and water, improve the liquid collection efficiency, and the separated oil and water can be discharged through independent outlets, reducing the subsequent treatment. In order to reduce the complexity and cost of the processing technology, the liquid collecting box body 101 is a sealed container with a liquid inlet 107 on the top for receiving the oil-water mixture discharged from the oil pumping well. The bottom of the liquid collecting box is provided with two independent outlets, one is an oil outlet 105 and the other is a water outlet 106. An oil-water separation plate 103 is arranged inside the liquid collecting box. The oil-water separation plate 103 is located below the liquid inlet 107 and divides the interior of the liquid collecting box into two left and right areas. A plurality of micropores 104 are provided on the separation plate. The pore size can allow water to pass through and intercept oil droplets, thereby realizing the preliminary separation of oil and water.

[0031] Among them, there are several micropores 104, and the extension tube 205 extends to the interior of the liquid collecting box body 101. An oil outlet 105 is opened at the bottom of the liquid collecting box body 101, and a water outlet 106 is opened at the bottom of the liquid collecting box body 101. The inlet of the cyclone separator 204 is a tangential inlet, and the outlets are respectively connected to the oil collection area and the water collection area. The oil outlet 105 and the water outlet 106 are both equipped with on-off valves. The upper part of the liquid collecting box is the oil collection area, and the separated oil is discharged through the oil outlet 105. The lower part of the liquid collecting box is the water collection area, and the separated water is discharged through the water outlet 106. The oil outlet 105 and the water outlet 106 are both equipped with valves 203, which can control the discharge as needed. The cyclone separator 204 is provided, which uses centrifugal force to further separate oil and water. The inlet of the cyclone separator 204 is connected to the liquid inlet 107, and the outlets are respectively connected to the oil collection area and the water collection area.

[0032] In this embodiment, Figure 1 、 Figure 3 and Figure 4As shown, a liquid inlet 107 is provided on the top of the liquid collecting box body 101, a rubber sealing strip 102 is fixedly connected to the inside of the liquid collecting box body 101, a valve 203 is fixedly connected to the top of the output pipe 201, an oil drainer 202 is provided on the top of the output pipe 201, the oil-water separation plate 103 is made of stainless steel and the surface is specially treated, the rubber sealing strip 102 has excellent elasticity and can be deformed under pressure and fit tightly to the sealing surface, thereby effectively preventing liquid or gas leakage, the rubber sealing ring 102 can adapt to sealing surfaces of different shapes and roughness, and can maintain a good sealing effect even if there are slight unevenness on the surface, and the rubber material can be compressed when under pressure, thereby filling the sealing gap and further enhancing the sealing performance.

[0033] The present invention also includes a liquid level monitoring component. An oil level sensor and a water level sensor are respectively installed on the outside of the liquid collecting box body 101. The oil level sensor and the water level sensor are respectively connected to the oil collection area and the water collection area in the liquid collecting box body 101, and are used to monitor the oil and water liquid levels in real time; a controller is installed on the top of the output pipe 201, and the controller is electrically connected to the oil level sensor, the water level sensor and the solenoid valves of the oil outlet 105 and the water outlet 106, and can automatically control the opening and closing of the valves according to the liquid level data.

[0034] The present invention also includes a pressure balancing device. A breathing hole is provided on the top of the liquid collecting box body 101, and a pressure valve is installed in the breathing hole. When the pressure in the liquid collecting box body 101 exceeds the set threshold value of 0.1-0.3MPa, the pressure valve automatically opens to release the pressure; a dust filter is provided on the outside of the breathing hole to prevent external impurities from entering the interior of the liquid collecting box body 101.

[0035] The working process of the present invention: When the oil well liquid collecting box with oil-water separation function designed by this scheme is in operation, the liquid collecting box body 101 is a sealed container with a liquid inlet 107 on the top for receiving the oil-water mixture discharged from the oil well. The bottom of the liquid collecting box is provided with two independent outlets, one is an oil outlet 105 and the other is a water outlet 106. An oil-water separation plate 103 is provided inside the liquid collecting box. The separation plate is located below the liquid inlet 107 and divides the interior of the liquid collecting box into two left and right areas. A plurality of micropores 104 are provided on the separation plate. The pore size can allow water to pass through and intercept oil droplets, thereby realizing the preliminary separation of oil and water. The liquid collecting box body 101 is made of high-strength steel to ensure its corrosion resistance and pressure bearing capacity. The volume of the liquid collecting box is determined according to the volume of the oil well. The output is designed to meet actual needs. The separation plate is made of stainless steel and its surface is specially treated to increase its hydrophilicity and oleophobicity. The micropores 104 on the separation plate have a pore size of 0.1-0.5 mm, which can effectively intercept oil droplets. The inlet of the cyclone separator 204 is designed as a tangential inlet, so that the liquid will rotate at high speed after entering. The separation efficiency of the cyclone separator 204 can reach more than 90%, further improving the oil-water separation effect. The oil-water mixture discharged from the oil well enters the liquid collection box through the liquid inlet 107. The mixture first passes through the cyclone separator 204 for preliminary separation and then passes through the oil-water separation plate 103 for further separation. The separated oil enters the oil collection area, and the water enters the water collection area, and is discharged through the oil outlet 105 and the water outlet 106 respectively.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated 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 invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An oil well liquid collecting box with oil-water separation function, comprising a main body (1), characterized in that: The top of the main body (1) is fixedly connected with an oil and water collection and discharge assembly (2); The main body (1) comprises a liquid collecting box body (101), an oil-water separation plate (103) is fixedly connected to the interior of the liquid collecting box body (101), and micropores (104) are provided inside the oil-water separation plate (103); The oil-water collecting and discharging assembly (2) comprises an output pipe (201), a cyclone separator (204) is installed at the bottom of the output pipe (201), and the output end of the cyclone separator (204) is fixedly connected to an extension pipe (205).

2. The oil well liquid collecting box with oil-water separation function according to claim 1 is characterized in that: The invention also includes a liquid level monitoring component. An oil level sensor and a water level sensor are respectively installed on the outside of the liquid collecting box body (101). The oil level sensor and the water level sensor are respectively connected to the oil collection area and the water collection area in the liquid collecting box body (101). A controller is installed on the top of the output pipe (201). The controller is electrically connected to the oil level sensor, the water level sensor and the solenoid valves of the oil outlet (105) and the water outlet (106), and automatically controls the opening and closing of the valves according to the liquid level data.

3. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: A breathing hole is provided on the top of the liquid collecting box body (101), and a pressure valve is installed in the breathing hole. When the pressure in the liquid collecting box body (101) exceeds a set threshold, the pressure valve automatically opens to release the pressure. A dust filter is provided on the outside of the breathing hole.

4. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: A plurality of micropores (104) are provided, and the extension tube (205) extends to the interior of the liquid collection box body (101).

5. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: An oil outlet (105) is provided at the bottom of the liquid collecting box body (101), and a water outlet (106) is provided at the bottom of the liquid collecting box body (101).

6. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: The inlet of the cyclone separator (204) is a tangential inlet, and the outlet is connected to the oil collection area and the water collection area respectively.

7. The oil well liquid collecting box with oil-water separation function according to claim 3, characterized in that: The oil outlet (105) and the water outlet (106) are both equipped with on-off valves.

8. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: A liquid inlet (107) is provided on the top of the liquid collecting box body (101), and a rubber sealing strip (102) is fixedly connected to the interior of the liquid collecting box body (101).

9. The oil well liquid collecting box with oil-water separation function according to claim 1, characterized in that: A valve (203) is fixedly connected to the top of the output pipe (201), and an oil drainer (202) is provided on the top of the output pipe (201).

10. The oil well liquid collecting box with oil-water separation function according to claim 3, characterized in that: The oil-water separation plate (103) is made of stainless steel, and its surface is specially treated.

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