A downcomer for a sedimentation clean water chamber of an oil, gas and water treatment equipment

Abstract

The present invention relates to the technical field of oil, gas and water treatment in oil fields. In order to realize simple and efficient separation of crude oil, gas and water, the present invention provides a downcomer of a sedimentation and purification chamber of an oil, gas and water treatment equipment, comprising a first tank body and a second tank body, wherein the first tank body is arranged above the second tank body, the first tank body is provided with an oil, gas and water separation chamber, the second tank body is provided with a sedimentation and purification chamber, a sedimentation and purification oil chamber and an AC and DC dehydration chamber which are not communicated with each other, the first tank body and the second tank body are connected by a downcomer. The present invention also provides a crude oil treatment method of the downcomer of the sedimentation and purification chamber of the oil, gas and water treatment equipment, wherein each circulation pipeline is utilized to continuously circulate and dehydrate the emulsified crude oil so that the water content of the discharged crude oil can meet the standard.

Description

Technical Field

[0001] The invention relates to the technical field of oil field oil, gas and water treatment, in particular to a downcomer for a sedimentation clean water cavity of oil, gas and water treatment equipment. Background Art

[0002] Existing oilfield treatment technology often consumes a lot of energy for oil, gas and water separation treatment. Generally, after treatment by oil, gas and water treatment equipment, the oil, gas and water separation is not sufficient, and further water treatment is required in subsequent steps, resulting in high energy consumption. It is necessary to further improve the oil, gas and water treatment equipment. Traditional oil, gas and water treatment equipment is mostly single-layer structure. A few double-layer equipment simply separates two independent containers into upper and lower layers through an intermediate platform. After treatment in the upper container, it is transported to the lower container through the main outlet pipe for further treatment. The oil, gas and water separation chamber of the upper structure of the device first performs oil, gas and water three-phase separation, and the produced water enters a small cavity in the upper structure. The volume of the cavity is limited, and it is impossible to ensure sufficient sedimentation time to achieve the purpose of purifying the produced water. Summary of the Invention

[0003] In order to realize on-site water distribution, on-site treatment and on-site reinjection of the produced liquid of old oil fields and reduce the energy consumption of ineffective circulation of produced water from the wellhead to the joint station and then to the wellhead, the present invention provides an oil, gas and water treatment equipment with an upper and lower double-layer structure, and a downcomer pipe connecting the sedimentation clean water cavity of the upper and lower tank bodies.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a downcomer for a sedimentation water purification chamber of an oil, gas and water treatment equipment, comprising a first tank body and a second tank body, the first tank body being arranged above the second tank body, the first tank body being provided with an oil, gas and water separation chamber, the second tank body being provided with a sedimentation water purification chamber, a sedimentation oil purification chamber and an AC / DC degassing chamber which are not communicated with each other, the first tank body and the second tank body being connected by a downcomer, the two ends of the downcomer being connected to the oil, gas and water separation chamber and the sedimentation water purification chamber.

[0005] As an optimization, the downcomer includes an upper connecting pipe, a lower connecting pipe, a metal hose and an air flotation port. The upper end of the upper connecting pipe is connected to the first tank body, the lower end of the upper connecting pipe is connected to the metal hose, the lower end of the metal hose is connected to the air flotation port, the lower end of the air flotation port is connected to the lower connecting pipe, and the lower end of the lower connecting pipe is connected to the second tank body.

[0006] As an optimization, the flotation port includes an outer circular tube, an injector is provided inside the outer circular tube, the injector is connected to the outer circular tube through a plurality of capillaries, the outer circular tube is also connected to a reverse demulsifier input pipe, the capillary connects the outer circular tube and the injector, the upper end of the injector is connected to a metal hose, and the lower end of the injector is connected to a lower connecting pipe.

[0007] As an optimization, the metal hose is a bellows compensator.

[0008] As an optimization, the outer circular tube includes a first outer circular tube and a second outer circular tube, and the first outer circular tube and the second outer circular tube are connected by flanges at their ends.

[0009] As an optimization, the downcomer of the sedimentation clean water chamber of the oil, gas and water treatment equipment is characterized in that the capillaries are evenly distributed along the inner circumference of the outer tube.

[0010] The beneficial effects of this solution are as follows: the present invention is provided with two upper and lower processing tanks, which can carry out two-step processing, and the downcomer structure can connect the first tank and the second tank, so as to achieve pressure balance in the upper and lower cavities of the whole device; the free water separated from the oil-gas-water separation chamber of the upper layer uses the potential difference to flow by gravity through the downcomer into the sedimentation and purification chamber of the lower structure, and the extension of the vertical space greatly increases the sedimentation distance and time of the produced water. During the sedimentation process, the oil droplets float up into the upper cavity through the downcomer connected with the upper and lower layers, and the water droplets fall into the sedimentation and purification chamber and are transported to the water treatment system through the bottom outlet; in addition, in order to facilitate the docking installation of the upper and lower cavities, the influence of displacement such as vibration and thermal expansion is reduced, and the sealing reliability of the connection parts is improved. The downcomer adopts a metal hose structure; the downcomer is arranged to facilitate disassembly of the upper and lower layers of the cavity, which is conducive to separate transportation, and is easy to assemble on site, without the need for welding, and can be directly flange-connected, shortening the construction period and simplifying maintenance; the oil and gas water treatment equipment of the present invention utilizes a sedimentation water purification cavity downcomer, which can greatly improve the oil-water separation effect by relying solely on gravity. At the same time, a reverse demulsifier needs to be added during the purification process of produced water. The reverse demulsifier is sprayed into the downcomer through the flotation port on the annular wall of the downcomer, so that the produced water and the reverse demulsifier are evenly and fully mixed in the space, which greatly improves the effect of the water purification agent, helps to shorten the subsequent produced water treatment process, relieves water treatment pressure, and reduces water treatment energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Attachment Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0012] Attachment Figure 2 Schematic diagram of the downcomer structure of the present invention.

[0013] Attachment Figure 3 It is a schematic diagram of the air flotation port structure of the present invention.

[0014] Among them, 1. First tank body, 2. Second tank body, 3. Oil-gas-water separation chamber, 4. Sedimentation clean water chamber, 5. Sedimentation clean oil chamber, 6. AC / DC degassing chamber, 7. Downcomer, 8. Upper connecting pipe, 9. Lower connecting pipe, 10. Metal hose, 11. Air flotation port, 12. Outer cylindrical tube, 13. Injector, 14. Capillary tube, 15. First outer cylindrical tube, 16. Second outer cylindrical tube, 17. Flange, 18. Reverse demulsifier input pipe. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. 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.

[0016] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0017] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] like Figure 1 In the illustrated embodiment, a downcomer for a sedimentation and purification water chamber of an oil, gas and water treatment equipment comprises a first tank body 1 and a second tank body 2. The first tank body 1 is arranged above the second tank body 2. An oil, gas and water separation chamber 3 is provided in the first tank body 1. The second tank body 2 is provided with a sedimentation and purification water chamber 4, a sedimentation and purification oil chamber 5 and an AC and DC desorption chamber 6 which are not connected to each other. The first tank body 1 and the second tank body 2 are connected by a downcomer 7. Both ends of the downcomer 7 are connected to the oil, gas and water separation chamber 3 and the sedimentation and purification water chamber 4.

[0019] The downcomer 7 includes an upper connecting pipe 8, a lower connecting pipe 9, a metal hose 10 and an air flotation port 11. The upper end of the upper connecting pipe 8 is connected to the first tank body 1, the lower end of the upper connecting pipe 8 is connected to the metal hose 10, the lower end of the metal hose 10 is connected to the air flotation port 11, the lower end of the air flotation port 11 is connected to the lower connecting pipe 9, and the lower end of the lower connecting pipe 9 is connected to the second tank body 2.

[0020] The flotation port 11 includes an outer circular tube 12, an injector 13 is provided in the outer circular tube 12, and the injector 13 is connected to the outer circular tube 12 through a plurality of capillaries 14. The outer circular tube 12 is also connected to a reverse demulsifier input pipe 18, and the capillary 14 connects the outer circular tube 12 and the injector 13. The upper end of the injector 13 is connected to the metal hose 10, and the lower end of the injector 13 is connected to the lower connecting pipe 9.

[0021] The metal hose 10 is a bellows compensator.

[0022] The outer tube 12 includes a first outer tube 15 and a second outer tube 16 , and the first outer tube 15 and the second outer tube 16 are connected via flanges 17 at their ends.

[0023] The downcomer 7 of the sedimentation clean water chamber 4 of the oil, gas and water treatment equipment is characterized in that the capillaries 14 are evenly distributed along the inner circumference of the outer tube 12 .

[0024] Working principle: The oil-gas-water mixture is first separated into three phases of oil, gas and water in the oil-gas-water separation chamber. The separated free water uses the potential difference to flow by gravity through the sedimentation water purification chamber downcomer into the sedimentation water purification chamber. In the process of produced water flowing through the downcomer, the reverse demulsifier is sprayed into the downcomer through the air flotation port of the sedimentation water purification chamber downcomer, and is evenly and fully mixed with the produced water. Then the mixed water flows to the sedimentation water purification chamber of the lower structure, and the produced water is further purified in the sedimentation water purification chamber to reduce the oil content of the outlet water, improve the inlet water quality entering the produced water treatment system, and finally output the produced water.

[0025] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any downcomer of the sedimentation clean water chamber of an oil, gas and water treatment equipment that complies with the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the relevant technical field shall fall within the patent protection scope of the present invention.

Claims

1. A downcomer for a sedimentation clean water chamber of an oil, gas and water treatment equipment, characterized by: The flask is connected to the control cabinet, and the control cabinet is connected to the control cabinet. The flask is connected to the control cabinet. The control cabinet is connected to the control cabinet.

2. The downcomer for the sedimentation clean water chamber of oil, gas and water treatment equipment according to claim 1, characterized in that: The metal hose is a bellows compensator.

3. The downcomer for the sedimentation clean water chamber of oil, gas and water treatment equipment according to claim 2, characterized in that: The outer tube comprises a first outer tube and a second outer tube, and the first outer tube and the second outer tube are connected via flanges at their ends.

4. The downcomer for the sedimentation clean water chamber of oil, gas and water treatment equipment according to claim 3, characterized in that: The capillaries are evenly distributed along the inner circumference of the outer tube.

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