Settling separation device of hydraulic pump drainage and mining system

Abstract

The invention discloses a settling separation device of a hydraulic pump drainage system. A raw water area, a sedimentation filtering area and a clear water area are transversely and sequentially arranged in a water tank, the raw water area is communicated with the lower part of the sedimentation filtering area, and a filter screen is arranged between the sedimentation filtering area and the clear water area; the settling and filtering area is wider than the raw water area; the water tank body of the raw water area is provided with a liquid inlet pipe; the water tank body of the clear water area is provided with a liquid outlet pipe; the diameter of the liquid outlet pipe is larger than that of the liquid inlet pipe; an inclined pipe for settling separation is transversely arranged in the settling and filtering area, a blow-off funnel arranged at the bottom of the water tank below the settling and filtering area is communicated with a blow-off pipe of a blow-off device, and the blow-off pipe is communicated with a sewage treatment system. The sedimentation tank has the beneficial effects that the structural design is reasonable, turbulent flow can be effectively reduced, the sedimentation efficiency is improved, and the sedimentation and sludge discharge effects are enhanced; the precipitation area is increased, and the treatment capacity of mixed liquid is improved; and through combined control with a hydraulic pump drainage and mining system, the working quality and efficiency of the hydraulic pump drainage and mining system are improved.

Description

Technical Field

[0001] The invention relates to a sedimentation separation device, in particular to a sedimentation separation device for a hydraulic pump drainage system, and belongs to the technical field of oil and gas development. Background Art

[0002] The hydraulic pump drainage process uses a ground plunger pump to boost pressure, injects high-pressure power liquid into the well, mixes the injected power liquid with the formation fluid through the hydraulic pump, lifts it to the ground together, and enters the ground pipe network, so as to achieve the purpose of discharging the liquid in the well. After the mixed liquid reaches the ground, it needs to be settled and filtered, and then the liquid without impurities that meets the process requirements is boosted and recycled again by the ground plunger pump. The excess liquid and sediment are discharged together to the well site sewage pool or sewage treatment pipe network. In this process, both the ground plunger pump and the hydraulic pump in the well have high requirements for water quality, and there must be no granular impurities, otherwise it will have a great impact on the service life and performance of the pump. At present, the filter water tank is mostly used for simple multi-stage baffle sedimentation filtration. The effect of this filtration method is greatly affected by the amount of liquid inlet. The larger the amount of liquid inlet and the more obvious the disturbance, the worse the sedimentation filtration effect; and the sewage discharge system of the filter water tank is manual sewage discharge, which wastes manpower and is prone to blockage if it is not discharged for a long time. Summary of the invention

[0003] In order to overcome the above-mentioned deficiencies existing in the sedimentation and filtration of mixed liquid in the existing hydraulic pump drainage process, the present invention provides a sedimentation and separation device for a hydraulic pump drainage system.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a sedimentation and separation device of a hydraulic pump drainage system, including a water tank and a sewage discharge device, the water tank is arranged above the sewage discharge device, and a raw water area, a sedimentation and filtration area, and a clean water area are arranged horizontally in sequence in the water tank, the raw water area is connected to the lower part of the sedimentation and filtration area, and a filter net is arranged between the sedimentation and filtration area and the clean water area; the width of the sedimentation and filtration area is greater than the width of the raw water area; the water tank body of the raw water area is provided with a liquid inlet pipe; the water tank body of the clean water area is provided with a liquid outlet pipe; the diameter of the liquid outlet pipe is greater than the diameter of the liquid inlet pipe.

[0005] The ratio of the flow rate of the clean water through the liquid outlet pipe to the flow rate of the mixed liquid through the liquid inlet pipe is 1.6-1.8: 0.29-0.32.

[0006] The sedimentation and filtration area is laterally provided with an inclined pipe for sedimentation and separation, and a sewage discharge funnel arranged at the bottom of the water tank below the sedimentation and filtration area is connected to a sewage discharge pipe of the sewage discharge device, and the sewage discharge pipe is connected to a sewage treatment system.

[0007] Furthermore, the ratio of the clean water flow rate of the liquid outlet pipe to the mixed liquid flow rate of the liquid inlet pipe is 1.7:0.3.

[0008] The sewage funnel at the bottom of the water tank is provided with a sewage liquid level sensor; when the sewage liquid level is lower than the upper limit design value, the valve installed on the sewage pipe is in a closed state; when the sewage liquid level reaches the upper limit design value, the valve installed on the sewage pipe is opened, and the sewage pump of the sewage discharge device is started to discharge the sewage in the sewage funnel and the sewage pipe; when the sewage liquid level reaches the lower limit design value, the sewage pump stops running and the valve on the sewage pipe is closed.

[0009] The baffle plate fixed vertically in the water tank divides the water tank horizontally into a raw water area and a sedimentation and filtration area. The mixed liquid in the raw water area enters the sedimentation and filtration area through the gap between the lower end of the baffle plate and the bottom plate of the water tank.

[0010] The bottom of the clear water zone is higher than the upper end of the inclined tube.

[0011] The angle between the inclined pipe and the bottom plate of the water tank is 55-65°

[0012] A plurality of inclined pipes are fixedly arranged side by side on a steel mesh bracket, one side of the steel mesh bracket is fixedly connected to the baffle, and the other side of the steel mesh bracket is fixedly connected to the side wall of the water tank.

[0013] The lower ends of the steel mesh bracket and the inclined tube are higher than the lower end of the baffle.

[0014] An overflow port is arranged on the upper part of the box body of the clean water area.

[0015] The sedimentation separation device is operated by an automatic control device of the control system, and controls the liquid inlet pressure displacement, liquid outlet pressure displacement and sewage discharge device according to process requirements.

[0016] The beneficial effects of the present invention are that the structural design is reasonable, which can effectively reduce turbulence, help to intercept fine and difficult to settle solid particles, improve sedimentation efficiency, and enhance sedimentation and sludge discharge effects; compared with ordinary sedimentation tanks, under the same footprint, the sedimentation area is increased and the processing capacity of the mixed liquid is improved; automatic control can minimize the probability of blockage, and jointly control with the hydraulic pump drainage system to improve the working quality and efficiency of the hydraulic pump drainage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the sedimentation and separation device of the hydraulic pump drainage system of the present invention.

[0018] In the figure: 1. liquid inlet pipe, 2. water tank, 3. baffle, 4. raw water area, 5. steel mesh bracket, 6. overflow port, 7. filter screen, 8. sedimentation filtration area, 9. clean water area, 10. liquid outlet pipe, 11. sewage discharge device, 12. inclined pipe, 13. bracket, 14. sewage funnel, 15. sewage pump, 16. valve, 17. sewage pipe, 18. frame, 19. steel wire filter screen. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. However, those skilled in the art should be aware that the present invention is not limited to the specific embodiments listed, and all embodiments should be included in the protection scope of the present invention as long as they conform to the spirit of the present invention.

[0020] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "left", "right", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing or simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", and "seal" should be understood in a broad sense. For example, the connection can be a fixed connection or a detachable connection, a direct connection, an indirect connection, or an integral connection; it can be a mechanical connection, an indirect connection through an intermediate medium, or a communication between the two components. The seal can be an oil seal, a packing seal, or other forms of seals. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See attached Figure 1 The present invention provides a hydraulic pump drainage system sedimentation and separation device, comprising a water tank 2 and a sewage discharge device 11. The water tank 2 is arranged above the sewage discharge device 11. Preferably, the water tank 2 is fixedly mounted on a bracket 13, and the sewage discharge device 11 is mounted in the bracket 13 below the water tank 2. The liquid inlet pipe 1 of the water tank 2 is connected to the mixed liquid delivery pump discharged from the wellbore. The power pump connected to the liquid outlet pipe 11 of the water tank 2 is connected to the drainage system pipe network, and the clean water obtained by filtering and sedimentation is delivered to the drainage system pipe network and then re-injected into the wellbore.

[0023] The water tank 2 is provided with a raw water area 4, a sedimentation filtration area 8, and a clean water area 9 in sequence in a transverse direction. The raw water area 4 is connected to the lower part of the sedimentation filtration area 8. Preferably, a baffle 3 is vertically fixed in the water tank 2 to separate the water tank 2 into a raw water area 4 and a sedimentation filtration area 8 in a transverse direction. Both sides of the baffle 3 are fixedly connected to the inner wall of the water tank 2. The lower end of the baffle 3 is suspended in the air, and there is a gap between the baffle 3 and the bottom plate of the water tank 2. The mixed liquid in the raw water area 4 enters the sedimentation filtration area 8 through the gap. A filter screen 7 is provided between the sedimentation filtration area 8 and the clean water area 9. The water after sedimentation filtration passes through the filter screen 7 and becomes clean water that meets the requirements for re-injection into the well and enters the clean water area 9.

[0024] The water tank 2 of the raw water area 4 is provided with a liquid inlet pipe 1, preferably, the liquid inlet pipe 1 is located at the upper end of the water tank 2; the water tank 2 of the clean water area 9 is provided with a liquid outlet pipe 10; the diameter of the liquid outlet pipe 10 is larger than the diameter of the liquid inlet pipe 1 to ensure that the liquid intake of the mixed liquid through the liquid inlet pipe 1 is basically the same as the liquid discharge amount of the clean water from the liquid outlet pipe 10.

[0025] Furthermore, the flow rate ratio of the clean water through the liquid outlet pipe 10 to the mixed liquid through the liquid inlet pipe 1 is 1.6-1.8:0.29-0.32; preferably, the flow rate ratio of the clean water in the liquid outlet pipe 10 to the mixed liquid in the liquid inlet pipe 1 is 1.7:0.3.

[0026] The width of the sedimentation and filtration zone 8 is greater than the width of the raw water zone 4, that is, the volume of the sedimentation and filtration zone 8 is greater than the volume of the raw water zone 4, so that the flow rate of the mixed liquid in the raw water zone is significantly reduced after entering the sedimentation and filtration zone 8, which is beneficial to the sedimentation and filtration of the mixed liquid.

[0027] An inclined pipe 12 for sedimentation separation is horizontally arranged in the middle of the sedimentation and filtration area 8. A sewage funnel 14 arranged at the bottom of the water tank 2 below the sedimentation and filtration area 8 is connected to a sewage pipe 17 of the sewage discharge device 11, and the sewage pipe 17 is connected to a sewage treatment system (not shown in the figure).

[0028] The sewage funnel 14 at the bottom of the water tank 2 is provided with a sewage liquid level sensor; when the sewage liquid level is lower than the upper limit design value, the valve installed on the sewage pipe 17 is in a closed state; when the sewage liquid level reaches the upper limit design value, the valve 16 installed on the sewage pipe 17 is opened, and the sewage pump 15 of the sewage discharge device 11 is started to discharge the sewage in the sewage funnel 14 and the sewage pipe 17; when the sewage liquid level reaches the lower limit design value, the sewage pump 15 stops running and the valve 16 on the sewage pipe 17 is closed.

[0029] Multiple inclined tubes 12 are fixedly arranged side by side on the steel mesh bracket 5, one side of the steel mesh bracket 5 is fixedly connected to the baffle 3, and the other three sides are fixedly connected to the inner wall of the water tank 2. The steel mesh bracket 5 includes a frame 18 and a steel wire filter 19, the frame 18 is welded by angle steel, the steel wire filter 19 is fixedly connected to the frame 18, and multiple inclined tubes 12 are arranged above the steel wire filter 19. The lower ends of the steel mesh bracket 5 and the inclined tubes 12 are higher than the lower end of the baffle 3, and the mixed liquid entering the sedimentation and filtration area 8 is first filtered by the steel wire filter 19, and the larger particle impurities filtered out settle downward into the sewage funnel 14.

[0030] Furthermore, the angle between the inclined tube 12 and the bottom plate of the water tank 2 is 55-65°, and preferably, the angle between the inclined tube 12 and the bottom plate of the water tank 2 is 60°. After the mixed liquid in the raw water area 4 enters the sedimentation and filtration area 8, the flow rate is significantly reduced, and the liquid flows slowly downward through the inclined tube 12 for sedimentation treatment, and the impurities therein settle downward into the sewage funnel 14.

[0031] The liquid outlet pipe 10 installed on the box body 2 of the clean water area 9 is connected to a power pump (such as a centrifugal pump). Preferably, the clean water area 9 is higher than the upper end of the inclined tube 12, the lower end of the clean water area 9 is a fixed steel plate, and the two vertical surfaces between the clean water area 9 and the sedimentation and filtration area 8 are filter screens 7. The height of the liquid outlet pipe 10 is higher than the upper end of the inclined tube 12, and the power pump transports the clean water after filtration and sedimentation in the box body 2 to the drainage system pipeline network.

[0032] A filter screen 7 is provided between the sedimentation filtration area 8 and the clean water area 9. Preferably, the filter screen 7 is a filter screen with a mesh size of 40 or above to filter out fine impurities in the water after sedimentation, thereby further improving the clean water quality.

[0033] Furthermore, an overflow port 6 is provided at the upper end of the box body 2 in the clean water area 9 , and when the water level in the clean water area 9 is higher than the overflow port 6 , the water is discharged from the box body 2 through the overflow port.

[0034] The sedimentation and separation device is operated by an automatic control device of the control system, which controls the liquid inlet pressure displacement, liquid outlet pressure displacement, sewage discharge device, etc. The parameters can be set according to the process requirements. The control system of the sedimentation and separation device is incorporated into the control system of the hydraulic pump drainage system, which can improve the working quality and efficiency of the hydraulic pump drainage system.

[0035] In a specific embodiment, the height of the hydraulic pump drainage system sedimentation separation device is 2500 mm, the width is 2500 mm, and the effective volume of the water tank is 5.7 m 3 . The water tank is welded from corrugated steel plates, and the bracket supporting the water tank is welded from steel sections or steel pipes. The bracket height is 800mm and the water tank height is 1700mm. The water tank is provided with raw water area, sedimentation and filtration area, and clean water area in sequence in the transverse direction (along the width direction). The width of the raw water area and the clean water area is 300mm, and the width of the sedimentation and filtration area is 1900mm; the distance between the lower end of the baffle and the bottom plate of the water tank is 150mm, and the distance between the lower end of the inclined surface of the steel mesh bracket and the bottom plate of the water tank is 300mm. The clean water area is arranged above the inclined pipe, located on one side of the box body with a width of 300 and 700mm from the upper end of the water tank. The upper end of the clean water area box body is provided with an overflow port, and the lower part is provided with a liquid outlet pipe. Two sewage funnels are arranged below the bottom plate of the water tank in the sedimentation and filtration area, and the sewage funnels are connected to the sewage pipe of the sewage discharge device.

[0036] A valve is provided on the sewage manifold of the sewage discharge device; preferably, the valve is an electric valve; the sewage discharge device is also provided with a sewage pump, preferably, the sewage pump is a mud delivery pump; the sewage discharge device is connected to the sewage treatment system, and the mud delivery pump delivers the sewage after sedimentation and filtration to the sewage treatment system for centralized treatment.

[0037] The working principle of the hydraulic pump drainage system sedimentation separation device of the present invention is: using the laminar flow principle to increase the sedimentation area and improve the processing capacity of the sedimentation tank. The flow channel design of the raw water area minimizes the disturbance of the incoming liquid; the inclined tube is set as the main filtering and sedimentation area, so that the liquid passes through the inclined tube plate structure from bottom to top and flows between the inclined tubes. The solid particles such as coal powder, sand and gravel deposited on the bottom surface of the inclined tube plate slide directly by gravity and are then discharged in a centralized manner, thereby achieving a purification effect.

[0038] The process of the sedimentation separation device of the hydraulic pump drainage system of the present invention is:

[0039] First, the mixture of formation fluid and power fluid in the wellbore is lifted to the ground by a hydraulic pump and enters the ground pipe network, and then enters the sedimentation and separation device of the hydraulic pump drainage system through the liquid inlet pipe 1;

[0040] Afterwards, the mixed liquid flows from top to bottom along the channel of the raw water area 4 to the bottom of the water tank 2, and enters the sedimentation and filtration area 8 through the gap between the baffle 3 and the bottom plate of the water tank 2;

[0041] During this process, the mixed liquid passes through the wire filter 19 from bottom to top to filter out solid particles such as coal powder, sand and gravel, and the solid particles slide directly into the sewage funnel 14 by gravity; after the mixed liquid passes through the wire filter 19 from bottom to top, large particles have been filtered out; at this time, the liquid flows slowly in the sedimentation and filtration area 8, and then passes through the inclined tube sedimentation to remove fine particles;

[0042] Then, the liquid in the sedimentation and filtration area 8 is filtered through a 40-mesh filter screen 7 and enters the clean water area 9. A ground plunger pump connected to the liquid outlet 10 pressurizes the clean water discharged from the clean water area and injects it into the wellbore for use by the hydraulic pump.

[0043] During the operation of the sedimentation separation device, the control system controls the state of the sewage discharge device 11. When the sewage liquid level is lower than the upper design limit, the valve on the sewage pipe 17 is in a closed state and the sewage pump 15 stops running; when the sewage liquid level reaches the upper design limit, the control system opens the valve 16 on the sewage pipe 17, and the sewage pump 15 starts to discharge the sewage in the sewage funnel 14 and the sewage pipe 17; when the sewage liquid level reaches the lower design limit, the sewage pump 15 stops running and the valve 16 is closed.

[0044] According to the well site construction, the sewage pipe discharges the sewage to the sewage pool on site, or to the external drainage pipe network. Since the mixed liquid carries the formation fluid into the water tank, it is inevitable that excess liquid will be produced, which is discharged through the overflow port 6, which is connected to the external drainage pipeline.

[0045] Compared with ordinary sedimentation tanks, the present invention increases the sedimentation area, improves the processing capacity, and reduces disturbance under the same floor space; the automatic sewage discharge system reduces the probability of blockage to the maximum extent; it is helpful to intercept fine and difficult to settle solid particles, improve sedimentation efficiency, and enhance sedimentation and sludge discharge effects; the structure is reasonable and simple, easy to manufacture, easy to maintain, and has a good prospect for promotion and application.

[0046] It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A hydraulic pump drainage system sedimentation separation device, comprising a water tank and a sewage discharge device, wherein the water tank is arranged above the sewage discharge device, and is characterized in that: The water tank is provided with a raw water area, a sedimentation filtration area, and a clean water area in sequence in a transverse direction. The raw water area is connected to the lower part of the sedimentation filtration area, and a filter screen is provided between the sedimentation filtration area and the clean water area. The width of the sedimentation filtration area is greater than that of the raw water area. The water tank body of the raw water area is provided with a liquid inlet pipe. The water tank body of the clean water area is provided with a liquid outlet pipe. The diameter of the liquid outlet pipe is greater than the diameter of the liquid inlet pipe. The ratio of the flow rate of the clean water through the liquid outlet pipe to the flow rate of the mixed liquid through the liquid inlet pipe is 1.6-1.8: 0.29-0.32; The sedimentation and filtration area is laterally provided with an inclined pipe for sedimentation and separation, and a sewage discharge funnel arranged at the bottom of the water tank below the sedimentation and filtration area is connected to a sewage discharge pipe of the sewage discharge device, and the sewage discharge pipe is connected to a sewage treatment system.

2. According to claim 1, the sedimentation and separation device of the hydraulic pump drainage system is characterized by: The ratio of the clean water flow rate of the liquid outlet pipe to the mixed liquid flow rate of the liquid inlet pipe is 1.7:0.

3.

3. According to claim 2, the sedimentation and separation device of the hydraulic pump drainage system is characterized by: The sewage funnel at the bottom of the water tank is provided with a sewage liquid level sensor; when the sewage liquid level is lower than the upper limit design value, the valve installed on the sewage pipe is in a closed state; when the sewage liquid level reaches the upper limit design value, the valve installed on the sewage pipe is opened, and the sewage pump of the sewage discharge device is started to discharge the sewage in the sewage funnel and the sewage pipe; When the sewage liquid level reaches the lower design value, the sewage pump stops running and the valve on the sewage pipe closes.

4. According to claim 3, the sedimentation and separation device of the hydraulic pump drainage system is characterized by: The baffle plate fixed vertically in the water tank divides the water tank horizontally into a raw water area and a sedimentation and filtration area. The mixed liquid in the raw water area enters the sedimentation and filtration area through the gap between the lower end of the baffle plate and the bottom plate of the water tank.

5. According to claim 4, the sedimentation and separation device of the hydraulic pump drainage system is characterized by: The bottom of the clear water zone is higher than the upper end of the inclined tube.

6. The sedimentation and separation device of the hydraulic pump drainage system according to claim 5 is characterized by: The angle between the inclined pipe and the bottom plate of the water tank is 55-65 degrees.

7. The sedimentation and separation device of the hydraulic pump drainage system according to claim 6 is characterized by: A plurality of inclined pipes are fixedly arranged side by side on a steel mesh bracket, one side of the steel mesh bracket is fixedly connected to the baffle, and the other side of the steel mesh bracket is fixedly connected to the side wall of the water tank.

8. The sedimentation and separation device of the hydraulic pump drainage system according to claim 7 is characterized by: The lower ends of the steel mesh bracket and the inclined tube are higher than the lower end of the baffle.

9. The sedimentation and separation device of the hydraulic pump drainage system according to claim 1 is characterized by: An overflow port is arranged on the upper part of the box body of the clean water area.

10. The sedimentation and separation device of the hydraulic pump drainage system according to claim 1 is characterized by: The sedimentation separation device is operated by an automatic control device of the control system, and controls the liquid inlet pressure displacement, liquid outlet pressure displacement and sewage discharge device according to process requirements.

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