Wellhead small-flow associated gas water bag type booster pump

Abstract

The invention relates to the technical field of oil exploitation, in particular to a wellhead small-flow associated gas water bag type booster pump which comprises a base and is characterized in that a water tank is fixedly connected to the upper surface of the base, a water pump is fixedly connected to the upper surface of the base, and a plurality of supporting frames are fixedly connected to the upper surface of the base; by arranging the connecting mechanism and the water inlet mechanism, a pump body pressurizing structure is adopted, and even if the pump body is broken, wellhead associated gas explosion cannot be caused; secondly, the pump body pump is not afraid of impurities such as water, particulate matters and oil sludge in associated gas, and the problems of abrasion, blockage and clamping stagnation of piston type mechanical pumping are avoided; and thirdly, the pump body is a rubber product, so that the pump body is corrosion-resistant and is not afraid of corrosive gas in associated gas, and particularly, hydrogen sulfide is extremely high in metal corrosion. And finally, the automation degree of equipment is high, water filling and water discharging of the pump body are completely and automatically controlled, automatic starting and stopping are achieved, manual operation is not needed, and maintenance is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of oil extraction, and more specifically to a wellhead small-flow associated gas-water bag type booster pump. Background Art

[0002] Petroleum is a non-renewable fossil fuel resource. In the process of its exploitation, a large amount of gaseous byproducts will inevitably be produced - wellhead associated gas, commonly known as wellhead gas. The main valuable and usable component of wellhead gas is methane (CH4). The volume of wellhead gas in different regions varies greatly, but the gas composition is basically the same, all containing saturated water, hydrogen sulfide, carbon dioxide, sulfur dioxide, carbon monoxide, light oil, sludge and other impurities and corrosive and toxic components to varying degrees.

[0003] In the past, due to backward technological level, it was impossible to thoroughly treat impurities and corrosive and toxic components in the wellhead gas, resulting in the inability to recycle and utilize the wellhead gas. Most of the wellhead gas was vented or burned, causing serious environmental pollution and a large amount of energy waste.

[0004] Now, with the rapid development of science and technology, especially new materials, new processes and new equipment, a series of new technologies have been gradually introduced into wellhead gas treatment.

[0005] For oil wells with large wellhead gas production, especially specialized gas wells, the wellhead gas recovery system has received sufficient attention from relevant departments and enterprises and institutions because of its sufficient development and utilization value. Its recovery and utilization technology has been developed rapidly and has basically matured so far. The mature recovery system process is: wellhead gas, pretreatment, desulfurization, deacidification, filtration, separation, pressure regulation, metering, low-pressure boosting, mixed hydrocarbon recovery, dehydrogenation, light hydrocarbon storage and transportation, high-pressure boosting, and high-pressure dehydration. After a series of treatments, the wellhead gas becomes a clean energy, which can be made into natural gas product pipelines for transportation and sale, can be used to fill CNG vehicles, and can also be used for gas engines to convert into electricity for use or sale. It has a wide range of uses.

[0006] For oil wells with low wellhead gas production, because their gas production is too small and they do not have enough development and utilization value, they have not received enough attention from relevant departments and enterprises and institutions, and their recycling technology has basically not been improved and developed. Small-volume oilfield associated gas is still stuck in the past treatment method of direct discharge or burning, but this method pollutes the environment and wastes energy, and has been gradually banned or eliminated. At present, the safer, more environmentally friendly and more economical way to treat this small-volume wellhead gas is to directly pressurize the wellhead associated gas and input it into the crude oil pipeline without investing in complex gas processing equipment, and then collect it together with the crude oil to the gathering station for unified treatment. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a wellhead small flow associated gas-water bag type booster pump to solve the problems existing in the above-mentioned background technology.

[0008] The present invention provides the following technical solution: a wellhead small flow associated gas-water bag type booster pump, comprising a base, characterized in that: a water tank is fixedly connected to the upper surface of the base, a water pump is fixedly connected to the upper surface of the base, a plurality of support frames are fixedly connected to the upper surface of the base, a pump body is fixedly connected to the upper end of the support frame, a water inlet mechanism for water inlet is arranged inside the pump body, and a connection mechanism for water control is arranged at the upper end of the pump body; The water inlet mechanism comprises a water inlet groove opened inside the pump body, the lower end of the pump body is connected with a water inlet pipe, one end of the water inlet pipe is connected with the water inlet groove, the other end of the water inlet pipe passes through the water pump and the water tank in sequence, the pump body is installed with a sewage pipe, two partition plates are fixedly installed inside the water inlet groove, two air guide pipes are fixed on the side wall of the pump body, and an air outlet pipe is fixed on the other side wall of the pump body; Furthermore, the pump body is composed of a cylinder and two hemispheres, and the pump body is a 600mm diameter diaphragm pressure tank adapted pump body, and the water inlet pipe is located between the water pump and the pump body and is provided with a one-way valve and a solenoid valve.

[0009] Furthermore, the partition plate divides the interior of the water inlet trough into two air chambers and one water chamber, the upper end of the water inlet pipe is connected to the water chamber, the upper end of the sewage pipe is connected to the water chamber, the outer wall of the sewage pipe is provided with a stop valve, the water outlet end of the sewage pipe is connected to the sewage outlet, the outer wall of one of the air guide pipes is provided with a solenoid valve and a one-way valve, the outer wall of the other air guide pipe is provided with a stop valve and a one-way valve, and the air inlet ends of the two air guide pipes are connected to associated gas.

[0010] Furthermore, the upper end of the pump body is connected to a water return pipe, and the other end of the water return pipe is connected to a water tank.

[0011] Furthermore, a solenoid valve is provided inside the water return pipe, and the water inlet end of the water tank is connected to an antifreeze liquid pipe.

[0012] Technical effects and advantages of the present invention: The present invention is provided with a connecting mechanism and a water inlet mechanism. The present invention adopts a pump body pressurization structure. Even if the pump body is broken, it will not cause the explosion of the associated gas at the wellhead. Second, the pump body is not afraid of impurities such as water, particulate matter, and sludge in the associated gas, and will not cause the wear, blockage, and stagnation problems of piston-type mechanical pumping. Third, the pump body is a rubber product, which is corrosion-resistant and is not afraid of corrosive gases in the associated gas, especially hydrogen sulfide, which is highly corrosive to metals. Finally, the equipment has a high degree of automation, and the filling and draining of the pump body are fully automatically controlled, and it starts and stops automatically, without manual operation, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic cross-sectional view of the water inlet mechanism structure of the present invention; Figure 4 It is a schematic diagram of the connecting mechanism structure of the present invention.

[0014] The accompanying drawings are marked as follows: 1. base; 2. water tank; 3. water pump; 4. support frame; 5. pump body; 6. water inlet mechanism; 601. water inlet trough; 602. water inlet pipe; 603. sewage pipe; 604. partition plate; 605. air guide pipe; 606. air outlet pipe; 7. connecting mechanism; 701. return pipe. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The wellhead small-flow associated gas-water bag type booster pump involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0016] Reference Figure 1 and Figure 2 The present invention provides a wellhead small-flow associated gas-water bag type booster pump, comprising a base 1, a water tank 2 is fixedly connected to the upper surface of the base 1, a water pump 3 is fixedly connected to the upper surface of the base 1, a plurality of support frames 4 are fixedly connected to the upper surface of the base 1, a pump body 5 is fixedly connected to the upper end of the support frame 4, a water inlet mechanism 6 for water inlet is arranged inside the pump body 5, and a connecting mechanism 7 for water control is arranged at the upper end of the pump body 5.

[0017] What needs to be specially explained in this embodiment is that: by providing a connecting mechanism 7 and a water inlet mechanism 6, the present invention adopts a pump body 5 pressurization structure, and even if the pump body 5 is broken, it will not cause the explosion of the associated gas at the wellhead; secondly, the pump body 5 is not afraid of impurities such as water, particulate matter, and sludge in the associated gas, and will not have the wear, blockage, and stagnation problems of piston-type mechanical pumping. Thirdly, the pump body 5 is a rubber product, which is corrosion-resistant and is not afraid of corrosive gases in the associated gas, especially hydrogen sulfide, which is highly corrosive to metals. Finally, the equipment has a high degree of automation, and the filling and draining of the pump body 5 are fully automatically controlled, and it starts and stops automatically, without manual operation, and is easy to maintain.

[0018] Reference Figure 3 The water inlet mechanism 6 includes a water inlet groove 601 opened inside the pump body 5, the lower end of the pump body 5 is connected with a water inlet pipe 602, one end of the water inlet pipe 602 is connected with the water inlet groove 601, and the other end of the water inlet pipe 602 passes through the water pump 3 and the water tank 2 in sequence, the pump body 5 is installed with a sewage pipe 603, two partition plates 605 are fixedly installed inside the water inlet groove 601, two air guide pipes 605 are fixed on the side wall of the pump body 5, and an air outlet pipe 606 is fixed on the other side wall of the pump body 5.

[0019] It should be particularly noted in this embodiment that: by providing the water inlet mechanism 6, it is possible to discharge the excess gas inside the pump body 5, and facilitate the subsequent re-entry of the associated gas into the air chamber from the pressure-reducing air inlet.

[0020] Reference Figure 1 The pump body 5 is composed of a cylinder and two hemispheres. The pump body 5 is a 600mm diameter diaphragm air pressure tank adapted to the pump body 5. The water inlet pipe 602 is located between the water pump 3 and the pump body 5 and is provided with a one-way valve and a solenoid valve.

[0021] It should be particularly noted in this embodiment that the wellhead gas is pressurized by filling and draining water from the pump body 5 .

[0022] Reference Figure 3 The partition plate 604 divides the interior of the water inlet trough 601 into two air chambers and one water chamber. The upper end of the water inlet pipe 602 is connected to the water chamber, and the upper end of the sewage pipe 603 is connected to the water chamber. A stop valve is provided on the outer wall of the sewage pipe 603, and the water outlet end of the sewage pipe 603 is connected to the sewage outlet. An electromagnetic valve and a one-way valve are provided on the outer wall of one of the air guide pipes 605, and a stop valve and a one-way valve are provided on the outer wall of the other air guide pipe 605. The air inlet ends of the two air guide pipes 605 are connected with associated gas.

[0023] What needs to be specially explained in this embodiment is that: when the gas inside the air chamber is emptied, the pump body 5 will swell due to the filling of air, and the pressure of the air chamber will reach 2.5 MPa. At this time, the associated gas is discharged from the pressurized air outlet of the device. After the sensor detects that the gas at the air outlet is exhausted, the pump body 5 is deflated from the air deflation port. At this time, the pressure of the air chamber is very low, and the associated gas will re-enter the air chamber from the pressure-reducing air inlet.

[0024] Reference Figure 4 The upper end of the pump body 5 is connected to a return pipe 701, and the other end of the return pipe 701 is connected to the water tank.

[0025] It should be particularly noted in this embodiment that: by providing the return pipe 701, excess water in the water chamber can be injected into the water tank, so as to facilitate better pressurization.

[0026] Reference Figure 4 A solenoid valve is arranged inside the return pipe 701, and the water inlet end of the water tank 2 is connected with an antifreeze pipe.

[0027] It should be particularly noted in this embodiment that: by providing antifreeze liquid, the water inside the water tank 2 can be prevented from freezing, so that the water inside the water tank 2 can be used more easily.

[0028] Working principle of the present invention: A pump press is installed at the air inlet of the pump body 5. The accumulated water and oil in the associated gas are discharged from the lower outlet of the device, and the wellhead gas is pressurized by filling and draining the pump body 5. First of all, this pressurization method is very safe, although the associated gas is a flammable gas and has the risk of explosion. Finally, the equipment has a high degree of automation, and the filling and draining of the pump body 5 are fully automatically controlled, automatically started and stopped, without manual operation, and easy maintenance.

[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 wellhead small flow associated gas-water bag type booster pump, comprising a base (1), characterized in that: A water tank (2) is fixedly connected to the upper surface of the base (1), a water pump (3) is fixedly connected to the upper surface of the base (1), a plurality of support frames (4) are fixedly connected to the upper surface of the base (1), a pump body (5) is fixedly connected to the upper end of the support frame (4), a water inlet mechanism (6) for water inlet is arranged inside the pump body (5), and a connection mechanism (7) for water control is arranged at the upper end of the pump body (5); The water inlet mechanism (6) comprises a water inlet groove (601) provided inside the pump body (5); the lower end of the pump body (5) is connected to a water inlet pipe (602); one end of the water inlet pipe (602) is connected to the water inlet groove (601); the other end of the water inlet pipe (602) passes through the water pump (3) and the water tank (2) in sequence; the pump body (5) is provided with a sewage pipe (603); two partition plates (604) are fixedly installed inside the water inlet groove (601); two air guide pipes (605) are fixed on the side wall of the pump body (5); and an air outlet pipe (606) is fixed on the other side wall of the pump body (5).

2. A wellhead small flow associated gas-water bag type booster pump according to claim 1, characterized in that: The pump body (5) is composed of a cylinder and two hemispheres. The pump body (5) is a 600 mm diameter diaphragm pressure tank adapted to the pump body 5. The water inlet pipe (602) is located between the water pump (3) and the pump body (5) and is provided with a one-way valve and a solenoid valve.

3. A wellhead small flow associated gas-water bag type booster pump according to claim 1, characterized in that: The partition plate (604) divides the interior of the water inlet trough (601) into two air chambers and one water chamber; the upper end of the water inlet pipe (602) is connected to the water chamber; the upper end of the sewage discharge pipe (603) is connected to the water chamber; a stop valve is provided on the outer wall of the sewage discharge pipe (603); the water outlet end of the sewage discharge pipe (603) is connected to the sewage outlet; the outer wall of one of the air guide pipes (605) is provided with a solenoid valve and a one-way valve; the outer wall of the other air guide pipe (605) is provided with a stop valve and a one-way valve; the air inlet ends of the two air guide pipes (605) are connected to associated gas.

4. A wellhead small flow associated gas-water bag type booster pump according to claim 1, characterized in that: The upper end of the pump body (5) is connected to a water return pipe (701), and the other end of the water return pipe (701) is connected to a water tank.

5. A wellhead small flow associated gas-water bag type booster pump according to claim 4, characterized in that: A solenoid valve is provided inside the water return pipe (701), and the water inlet end of the water tank (2) is connected to an antifreeze liquid pipe.

Images