Oil field polymer injection liquid preparation device

Abstract

The utility model relates to an oil field polymer injection liquid preparation device. According to the technical scheme, a stock bin is installed on supporting legs, a spiral feeding machine is installed at the bottom of the stock bin, an input port of the spiral feeding machine is communicated with a discharging port of the stock bin, the output end of the spiral feeding machine is connected with the top of a metering bin, a discharging port is formed in the lower end of the metering bin, an air compressor is installed on one side of the discharging port, and the lower end of the discharging port is connected with a feeding injection pipeline. The tail end of the feeding injection pipeline is connected with a suction pump, a water inlet of the suction pump is connected with a water injection pipeline, a water feeding electric valve is installed on the water injection pipeline, and a water outlet of the suction pump is connected with the stirring tank through a pipeline. The utility model has the beneficial effects that the full-process mechanical operation is realized, polymer particles are not packaged and are not contacted by personnel, the labor intensity of workers is reduced, dust occupational hazards and packaging bag solid waste environmental protection risks are thoroughly reduced, the purpose of more accurate metering is also realized, and the production efficiency is improved. And green and environment-friendly production in the storage, transportation and addition links of the chemical flooding polymer particles is realized.

Description

Technical Field

[0001] This utility model relates to the field of oilfield polymer injection technology, and in particular to an oilfield polymer injection fluid preparation device. Background Technology

[0002] Currently, with the continuous development of the petroleum industry, oil extraction is divided into three stages: primary oil recovery, secondary oil recovery, and tertiary oil recovery. In the secondary oil recovery stage, gas or water is injected into the reservoir to increase reservoir pressure, replenishing the elastic energy of the rocks and fluids in the formation. This prevents the establishment of a new pressure balance between the rocks and fluids, allowing formation fluids to continuously flow to the well, thus enabling the extraction of oil that cannot be obtained using natural energy alone. In the tertiary oil recovery stage, various physical and chemical methods are used to alter the viscosity and adsorption of crude oil to rocks, increasing its flowability and further improving oil recovery rates. The main methods of tertiary oil recovery include polymer flooding, chemical flooding, gas flooding, thermal recovery, and microbial flooding.

[0003] In the polymer flooding process of tertiary oil recovery, the preparation of the polymer injection solution involves manually carrying bags of polymer raw materials one by one to the mixing tank, weighing them manually, and then having workers open the water inlet valve of the mixing tank. Water is injected into the mixing tank through a suction pump, which uses the jet principle to generate negative pressure at the suction inlet. Workers insert the other end of the suction pipe connected to the suction pump inlet into the raw material bags, uniformly mixing the polymer raw material particles one bag at a time and adding them to the mixing tank. The problems with this method are: high labor intensity from manually carrying and weighing the raw material bags, long manual addition time, and low data statistics efficiency. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing an oilfield polymer injection fluid preparation device that achieves fully mechanized operation, eliminates the need for packaging and personnel contact with the polymer particles, reduces the labor intensity of employees, mitigates occupational hazards from dust and environmental risks from solid waste from packaging bags, and also achieves more accurate measurement.

[0005] The present invention relates to an oilfield polymer injection fluid preparation device, the technical solution of which includes a silo (1), a screw feeder (2), a metering chamber (3), an air compressor (6), a feeding and injection pipeline (7), a suction pump (8), a water supply electric valve (9), a water injection pipeline (10), a mixing tank (11), and support legs (15). The silo (1) is mounted on the support legs (15), and the screw feeder (2) is mounted on the bottom of the silo (1). The input port of the screw feeder (2) is connected to the silo (1). The discharge port is connected, the output end of the screw feeder (2) is connected to the top of the metering chamber (3), the lower end of the metering chamber (3) is provided with a discharge port, an air compressor (6) is installed on one side of the discharge port, the lower end of the discharge port is connected to the feeding injection pipeline (7), the end of the feeding injection pipeline (7) is connected to the suction pump (8), the inlet of the suction pump (8) is connected to the water injection pipeline (10), the water injection pipeline (10) is equipped with a water electric valve (9), and the outlet of the suction pump (8) is connected to the mixing tank (11) through the pipeline.

[0006] Preferably, the lower side of the metering chamber (3) is a conical structure, and one or more vibrators (5) are installed on the outer wall of the conical structure.

[0007] Preferably, a material level monitor (14) is installed on the aforementioned silo (1).

[0008] Preferably, the mixing tank (11) is equipped with a stirrer inside, a stirring motor (12) is installed on the top, and a liquid level sensor (13) is installed inside the mixing tank (11).

[0009] Preferably, a support frame (17) is installed on one side of the above-mentioned silo (1), and the upper part of the metering silo (3) is connected to the lower side of the support frame (17) through a weighing module (16).

[0010] Preferably, a rain cover (4) is installed above the support frame (17), and the rain cover (4) adopts a sloping structure.

[0011] Preferably, the above-mentioned screw conveyor (2) is a flexible screw conveyor or a straight pipe screw conveyor.

[0012] Preferably, the above-mentioned straight tube screw conveyor includes a motor (2.1), a reducer (2.2), a straight tube conveying cylinder (2.3), a screw propeller (2.4), a conveyor inlet (2.5), and a conveyor outlet (2.6). The output end of the motor (2.1) is connected to the reducer (2.2), the output end of the reducer (2.2) is connected to the screw propeller (2.4), and the screw propeller (2.4) is installed in the inner cavity of the straight tube conveying cylinder (2.3). The conveyor inlet (2.5) is installed at one end of the straight tube conveying cylinder (2.3), and the conveyor outlet (2.6) is installed at the other end.

[0013] Preferably, the above-mentioned flexible screw conveyor includes a motor (2.1), a reducer (2.2), a conveyor inlet (2.5), a conveyor outlet (2.6), a flexible conveying cylinder (2.7), a flexible propulsion shaft (2.8), and a screw (2.9). The output end of the motor (2.1) is connected to the reducer (2.2), and the output end of the reducer (2.2) is connected to the flexible propulsion shaft (2.8). The screw (2.9) is installed on the outer wall of the flexible propulsion shaft (2.8). The flexible propulsion shaft (2.8) and the screw (2.9) are installed in the inner cavity of the flexible conveying cylinder (2.7). One end of the flexible conveying cylinder (2.7) is provided with a conveyor inlet (2.5), and the other end is provided with a conveyor outlet (2.6).

[0014] The beneficial effects of this utility model are as follows: This utility model uses a screw conveyor to transport polymer particles from the silo to the metering silo. After the weighing module detects that the predetermined feeding amount has been reached, the screw conveyor stops feeding. Then, the air compressor, electric water valve, and vibrator at the bottom of the metering silo are turned on. The suction pump mixes the polymer raw material particles with the injection water and then enters the mixing tank. Then, the stirring motor in the mixing tank is started to stir, completing the preparation process of the polymer injection liquid. This realizes the mechanized operation of the entire process. The polymer particles are unpackaged and have no personnel contact, reducing the labor intensity of employees, completely eliminating occupational hazards from dust and environmental risks from solid waste from packaging bags, and also achieving more accurate metering. This realizes green and environmentally friendly production in the storage, transportation, and addition of chemically driven polymer particles. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of a straight-tube screw conveyor;

[0017] Figure 3 This is a schematic diagram of the structure of a flexible screw conveyor;

[0018] In the diagram above: 1. Hopper; 2. Screw conveyor; 3. Metering bin; 4. Rain cover; 5. Vibrator; 6. Air compressor; 7. Feeding and injection pipeline; 8. Suction pump; 9. Electric water valve; 10. Water injection pipeline; 11. Mixing tank; 12. Mixing motor; 13. Liquid level sensor; 14. Material level monitor; 15. Support leg; 16. Weighing module; 2.1 Motor; 2.2 Reducer; 2.3 Straight pipe conveyor; 2.4 Screw propeller; 2.5 Conveyor inlet and 2.6 Conveyor outlet; 2.7 Flexible conveyor; 2.8 Flexible propulsion shaft; 2.9 Screw body. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1, referring to Figure 1 The present invention relates to an oilfield polymer injection fluid preparation device, the technical solution of which includes: a silo 1, a screw feeder 2, a metering chamber 3, an air compressor 6, a feeding injection pipeline 7, a suction pump 8, a water supply electric valve 9, a water injection pipeline 10, a mixing tank 11, and a support leg 15. The silo 1 is mounted on the support leg 15. The screw feeder 2 is mounted at the bottom of the silo 1. The input port of the screw feeder 2 is connected to the discharge port of the silo 1. The output end of the screw feeder 2 is connected to the top of the metering chamber 3. The lower end of the metering chamber 3 is provided with a discharge port. The air compressor 6 is mounted on one side of the discharge port. The lower end of the discharge port is connected to the feeding injection pipeline 7. The end of the feeding injection pipeline 7 is connected to the suction pump 8. The inlet of the suction pump 8 is connected to the water injection pipeline 10. The water supply electric valve 9 is mounted on the water injection pipeline 10. The outlet of the suction pump 8 is connected to the mixing tank 11 through a pipeline.

[0021] The lower side of the metering chamber 3 is a conical structure. One or more vibrators 5 are installed on the outer wall of the conical structure. The vibrators can effectively discharge the polymer particles in the metering chamber 3 into the feeding injection pipeline 7.

[0022] A material level monitor 14 is installed on the aforementioned silo 1. The material level monitor 14 is a commercially available material level monitor, which can meet the requirements for measuring the material level in the powder storage silo.

[0023] The aforementioned mixing tank 11 is equipped with a stirrer inside and a stirring motor 12 is installed on the top. A liquid level sensor 13 is installed inside the mixing tank 11 to determine the liquid level inside the mixing tank 11.

[0024] A support frame 17 is installed on one side of the aforementioned silo 1. The upper part of the metering silo 3 is connected to the lower side of the support frame 17 via a weighing module 16. In this embodiment, the specific weight is obtained by suspending the metering silo 3 and weighing it using the principle of a lever scale.

[0025] A rain cover 4 is installed on top of the aforementioned support frame 17. The rain cover 4 has a sloping structure.

[0026] The aforementioned screw conveyor 2 adopts a flexible screw conveyor or a straight pipe screw conveyor.

[0027] Reference Figure 2The straight tube screw conveyor mentioned in this utility model includes a motor 2.1, a reducer 2.2, a straight tube conveying cylinder 2.3, a screw propeller 2.4, a conveyor inlet 2.5, and a conveyor outlet 2.6. The output end of the motor 2.1 is connected to the reducer 2.2, and the output end of the reducer 2.2 is connected to the screw propeller 2.4. The screw propeller 2.4 is installed in the inner cavity of the straight tube conveying cylinder 2.3. The conveyor inlet 2.5 is installed at one end of the straight tube conveying cylinder 2.3, and the conveyor outlet 2.6 is installed at the other end.

[0028] When this utility model is used, the polymer raw materials are transported to the site and unloaded into the silo 1 in one go. When it is necessary to prepare the polymer injection solution, firstly, the screw conveyor 2 is started to transport the polymer particles in the silo to the metering silo 3. After the weighing module 16 detects that the predetermined feeding amount has been reached, the screw conveyor stops feeding. Then, the air compressor 6, the electric water valve 9, and the vibrator 5 at the bottom of the metering silo 3 are turned on in sequence. The suction pump 8 mixes the polymer raw material particles in the metering silo 3 with the injection water and then enters the mixing tank 11. Then, the stirring motor 12 in the mixing tank 11 is started to stir. After the stirring motor 12 runs for a preset time, it stops stirring, thus completing the preparation process of the polymer injection solution. The entire process is mechanized. The polymer particles are unpackaged and have no personnel contact, which reduces the labor intensity of employees and completely eliminates the occupational hazards of dust and the environmental risks of solid waste from packaging bags. The metering silo also achieves the purpose of more accurate measurement, realizing green and environmentally friendly production in the storage, transportation, and addition of chemically driven polymer particles. Example

[0029] This utility model discloses an oilfield polymer injection fluid preparation device, comprising a silo 1, a screw feeder 2, a metering chamber 3, an air compressor 6, a feeding and injection pipeline 7, a suction pump 8, a water supply electric valve 9, a water injection pipeline 10, a mixing tank 11, and support legs 15. The silo 1 is mounted on the support legs 15. The screw feeder 2 is mounted at the bottom of the silo 1, and its input port is connected to the discharge port of the silo 1. The output end of the screw feeder 2 is connected to the top of the metering chamber 3. The lower end of the metering chamber 3 has a discharge port, and the air compressor 6 is mounted on one side of the discharge port. The lower end of the discharge port is connected to the feeding and injection pipeline 7. The end of the feeding and injection pipeline 7 is connected to the suction pump 8. The inlet of the suction pump 8 is connected to the water injection pipeline 10, and the water supply electric valve 9 is mounted on the water injection pipeline 10. The outlet of the suction pump 8 is connected to the mixing tank 11 through a pipeline.

[0030] The difference from Example 1 is:

[0031] Reference Figure 3The flexible screw conveyor mentioned in this utility model includes a motor 2.1, a reducer 2.2, a conveyor inlet 2.5, a conveyor outlet 2.6, a flexible conveying cylinder 2.7, a flexible propulsion shaft 2.8, and a screw 2.9. The output end of the motor 2.1 is connected to the reducer 2.2, and the output end of the reducer 2.2 is connected to the flexible propulsion shaft 2.8. The screw 2.9 is installed sequentially on the outer wall of the flexible propulsion shaft 2.8. The flexible propulsion shaft 2.8 and the screw 2.9 are installed in the inner cavity of the flexible conveying cylinder 2.7. One end of the flexible conveying cylinder 2.7 is provided with a conveyor inlet 2.5, and the other end is provided with a conveyor outlet 2.6. The flexible screw conveyor is suitable for various powdery, granular, spherical, and flake materials, and can better meet the material conveying needs of different site conditions. Example

[0032] This utility model discloses an oilfield polymer injection fluid preparation device, comprising a silo 1, a screw feeder 2, a metering chamber 3, an air compressor 6, a feeding and injection pipeline 7, a suction pump 8, a water supply electric valve 9, a water injection pipeline 10, a mixing tank 11, and support legs 15. The silo 1 is mounted on the support legs 15. The screw feeder 2 is mounted at the bottom of the silo 1, and its input port is connected to the discharge port of the silo 1. The output end of the screw feeder 2 is connected to the top of the metering chamber 3. The lower end of the metering chamber 3 has a discharge port, and the air compressor 6 is mounted on one side of the discharge port. The lower end of the discharge port is connected to the feeding and injection pipeline 7. The end of the feeding and injection pipeline 7 is connected to the suction pump 8. The inlet of the suction pump 8 is connected to the water injection pipeline 10, and the water supply electric valve 9 is mounted on the water injection pipeline 10. The outlet of the suction pump 8 is connected to the mixing tank 11 through a pipeline.

[0033] The difference from Example 1 is:

[0034] In this embodiment, pressure sensors are installed at the bottom of the four support legs 15 of the hopper 1 to obtain the real-time weight of the hopper 1, thereby determining the weight of the polymer fed into the metering chamber 3 and achieving accurate metering.

[0035] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An oilfield polymer injection fluid preparation device, characterized in that: The system includes a silo (1), a screw feeder (2), a metering silo (3), an air compressor (6), a feeding injection pipeline (7), a suction pump (8), a water supply electric valve (9), a water injection pipeline (10), a mixing tank (11), and a support leg (15). The silo (1) is mounted on the support leg (15). The screw feeder (2) is mounted on the bottom of the silo (1). The input port of the screw feeder (2) is connected to the discharge port of the silo (1). The output end of the screw feeder (2) is connected to the top of the metering silo (3). The lower end of the metering silo (3) is provided with a discharge port. An air compressor (6) is mounted on one side of the discharge port. The lower end of the discharge port is connected to the feeding injection pipeline (7). The end of the feeding injection pipeline (7) is connected to the suction pump (8). The inlet of the suction pump (8) is connected to the water injection pipeline (10). A water supply electric valve (9) is mounted on the water injection pipeline (10). The outlet of the suction pump (8) is connected to the mixing tank (11) through a pipeline.

2. The oilfield polymer injection fluid preparation device according to claim 1, characterized in that: The lower side of the metering chamber (3) is a conical structure, and one or more vibrators (5) are installed on the outer wall of the conical structure.

3. The oilfield polymer injection fluid preparation device according to claim 2, characterized in that: A material level monitor (14) is installed on the silo (1).

4. The oilfield polymer injection fluid preparation device according to claim 2, characterized in that: The mixing tank (11) is equipped with a stirrer inside, a stirring motor (12) is installed on the top, and a liquid level sensor (13) is installed inside the mixing tank (11).

5. The oilfield polymer injection fluid preparation device according to claim 2, characterized in that: A support frame (17) is installed on one side of the silo (1), and the upper part of the metering silo (3) is connected to the lower side of the support frame (17) via a weighing module (16).

6. The oilfield polymer injection fluid preparation device according to claim 5, characterized in that: A rain cover (4) is installed above the support frame (17), and the rain cover (4) adopts a sloping structure.

7. The oilfield polymer injection fluid preparation device according to claim 1, characterized in that: The screw conveyor (2) is a flexible screw conveyor or a straight pipe screw conveyor.

8. The oilfield polymer injection fluid preparation device according to claim 7, characterized in that: The straight tube screw conveyor includes a motor (2.1), a reducer (2.2), a straight tube conveying cylinder (2.3), a screw propeller (2.4), a conveyor inlet (2.5), and a conveyor outlet (2.6). The output end of the motor (2.1) is connected to the reducer (2.2), and the output end of the reducer (2.2) is connected to the screw propeller (2.4). The screw propeller (2.4) is installed inside the straight tube conveying cylinder (2.3). The conveyor inlet (2.5) is installed at one end of the straight tube conveying cylinder (2.3), and the conveyor outlet (2.6) is installed at the other end.

9. The oilfield polymer injection fluid preparation device according to claim 7, characterized in that: The flexible screw conveyor includes a motor (2.1), a reducer (2.2), a conveyor inlet (2.5), a conveyor outlet (2.6), a flexible conveying cylinder (2.7), a flexible propulsion shaft (2.8), and a screw (2.9). The output end of the motor (2.1) is connected to the reducer (2.2), and the output end of the reducer (2.2) is connected to the flexible propulsion shaft (2.8). The screw (2.9) is installed on the outer wall of the flexible propulsion shaft (2.8). The flexible propulsion shaft (2.8) and the screw (2.9) are installed in the inner cavity of the flexible conveying cylinder (2.7). One end of the flexible conveying cylinder (2.7) is provided with a conveyor inlet (2.5), and the other end is provided with a conveyor outlet (2.6).

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