Novel pressure drive water injection oil extraction device

Abstract

The utility model relates to a novel pressure drive water injection oil extraction device. According to the technical scheme, the device comprises a pressure drive pump (a), a high-pressure slurry outlet manifold, a slurry inlet manifold and a liquid storage tank, the output end of a motor of the pressure drive pump is connected with a constant-power variable pump, the liquid outlet end of the constant-power variable pump is connected to one end of a hydraulic reciprocating oscillator, and the other end of the hydraulic reciprocating oscillator is connected to a hydraulic oil tank through a pipeline; the two sides of the hydraulic reciprocating oscillator are connected with the valve boxes respectively, the output ends of the valve boxes are connected to the well head device through the high-pressure slurry outlet manifolds respectively, and the input ends of the valve boxes are connected with the liquid storage tanks through the slurry inlet manifolds respectively. The utility model has the beneficial effects that more than one press-driven pump works, so that the traditional mechanical transmission chain is omitted, the mechanical transmission link is reduced, and the high-efficiency transmission of energy is realized; low-viscosity oil displacement liquid enters the valve box through the slurry inlet manifold, and high-pressure oil displacement liquid is fed into a wellhead device under the action of the reciprocating piston rod, so that higher water injection pressure is realized.

Description

Technical Field

[0001] The utility model relates to petroleum industry equipment, in particular to a novel pressure-driven water injection oil production device. Background Art

[0002] In oil production, the effectiveness of water flooding in low-permeability reservoirs depends on the transfer and maintenance of energy. From the perspective of reservoir management, it emphasizes injecting enough water and injecting water well; from a technical perspective, it means injecting enough water using various technical means to ensure that the low-permeability reservoir has enough energy to drive fluid flow. At present, facing the problems of "under-injection and failure to inject" of water wells and "failure to produce" of oil wells, the oil production rate is low and the degree of production is low, there is an urgent need for technological innovation to significantly improve the injection capacity and improve the development effect. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of pressure-driven water injection oil production device to address the above-mentioned defects in the prior art. By adopting more than one pressure-driven pump, high-pressure rapid injection is achieved, formation energy is increased, production pressure difference and oil well production capacity are improved; at the same time, oil displacement efficiency is improved, thereby increasing oil reservoir recovery rate.

[0004] The utility model discloses a novel pressure-driven water injection oil production device, the technical scheme of which is as follows: comprising at least one pressure-driven pump (a), a high-pressure slurry outlet manifold (8), a slurry inlet manifold (9) and a liquid storage tank (13), the pressure-driven pump (a) comprising an electric motor (1), a constant power variable pump (2), an oil inlet hydraulic hose (3), a hydraulic oil tank (4), a hydraulic reciprocating oscillator (5), a reciprocating piston rod (6), a first hydraulic cylinder sleeve (7), a first valve box (10), a second valve box (11) and a second hydraulic cylinder sleeve (12), the output end of the electric motor (1) being connected to the constant power variable pump (2), the constant power The liquid inlet end of the variable pump (2) is connected to the lower side of the hydraulic oil tank (4), the liquid outlet end of the constant power variable pump (2) is connected to one end of a hydraulic reciprocating oscillator (5) through an oil inlet hydraulic hose (3), and the other end of the hydraulic reciprocating oscillator (5) is connected to the hydraulic oil tank (4) through a pipeline. The two sides of the hydraulic reciprocating oscillator (5) are respectively connected to a first valve box (10) and a second valve box (11), and the output ends of the first valve box (10) and the second valve box (11) are respectively connected to a wellhead device (b) through a high-pressure slurry outlet manifold (8), and the input ends are respectively connected to a liquid storage tank (13) through a slurry inlet manifold (9).

[0005] Preferably, the inner cavity of the hydraulic reciprocating oscillator (5) drives two groups of reciprocating piston rods (6) to perform reciprocating motion, and the reciprocating piston rod (6) on the left side is located in the first hydraulic cylinder sleeve (7), the first hydraulic cylinder sleeve (7) is connected to the first valve box (10), and the reciprocating piston rod (6) on the right side is located in the second hydraulic cylinder sleeve (12), and the second hydraulic cylinder sleeve (12) is connected to the second valve box (11).

[0006] Preferably, a dosing pump (13.1) is installed on one side of the liquid storage tank (13) to add the agent into the liquid storage tank (13) to form a low-viscosity oil displacement liquid, and the liquid inlet of the liquid storage tank (13) is connected to the water inlet pipe (14).

[0007] Preferably, a sand replenisher (13.2) is installed on the other side of the liquid storage tank (13) to form a sand-mixed liquid.

[0008] Preferably, a control room (c) is installed on one side of the pressure-driven pump (a), and a power cable switch is installed in the control room (c), which is connected to the distribution box of each pressure-driven pump (a) through a power cable (15).

[0009] Preferably, each pressure-driven pump (a) and dosing pump (13.1) is connected to the control room (c) via a signal control line.

[0010] The beneficial effects of the utility model are as follows: the utility model works through more than one pressure-driven pump, and the high-speed rotational mechanical energy of the motor of the pressure-driven pump is converted into the pressure energy of the hydraulic oil through the constant power variable pump, thereby eliminating the traditional mechanical transmission chain, reducing the mechanical transmission links, and realizing high-efficiency energy transmission; the hydraulic reciprocating oscillator then directly converts the pressure energy of the hydraulic oil into the pressure energy of the working fluid through the reciprocating piston rod, and the low-viscosity oil displacement fluid enters the valve box through the slurry inlet manifold, and under the action of the reciprocating piston rod, the high-pressure oil displacement fluid is sent to the wellhead device through the high-pressure slurry outlet manifold, thereby realizing higher water injection pressure and overcoming the long-standing injection and production problem of "no injection and no production" in low-permeability oil reservoir blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of a pressure-driven pump;

[0013] Figure 3 It is a schematic diagram of the connection between the hydraulic reciprocating oscillator and the valve box;

[0014] Figure 4 It is a schematic diagram of the operating principle of the hydraulic reciprocating oscillator and the valve box;

[0015] In the above figure: electric motor 1, constant power variable pump 2, oil inlet hydraulic hose 3, hydraulic oil tank 4, hydraulic reciprocating oscillator 5, reciprocating piston rod 6, first hydraulic cylinder sleeve 7, high-pressure slurry outlet manifold 8, slurry inlet manifold 9, first valve box 10, second valve box 11, second hydraulic cylinder sleeve 12, liquid storage tank 13, water inlet pipeline 14 power cable 15, pressure drive pump a, wellhead device b, control room c, dosing pump 13.1, sand replenisher 13.2. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] Example 1, reference Figure 1-Figure 4 The utility model mentions a novel pressure-driven water injection and oil production device, comprising more than one pressure-driven pump a, a high-pressure slurry outlet manifold 8, a slurry inlet manifold 9 and a liquid storage tank 13, wherein the pressure-driven pump a comprises an electric motor 1, a constant power variable pump 2, an oil inlet hydraulic hose 3, a hydraulic oil tank 4, a hydraulic reciprocating oscillator 5, a reciprocating piston rod 6, a first hydraulic cylinder sleeve 7, a first valve box 10, a second valve box 11 and a second hydraulic cylinder sleeve 12, wherein the output end of the electric motor 1 is connected to the constant power variable pump 2, and the constant power variable pump 2 The liquid inlet end is connected to the lower side of the hydraulic oil tank 4, the liquid outlet end of the constant power variable pump 2 is connected to one end of the hydraulic reciprocating oscillator 5 through the oil inlet hydraulic hose 3, and the other end of the hydraulic reciprocating oscillator 5 is connected to the hydraulic oil tank 4 through a pipeline. The two sides of the hydraulic reciprocating oscillator 5 are respectively connected to the first valve box 10 and the second valve box 11, and the output ends of the first valve box 10 and the second valve box 11 are respectively connected to the wellhead device b through the high-pressure slurry outlet manifold 8, and the input ends are respectively connected to the liquid storage tank 13 through the slurry inlet manifold 9.

[0018] Reference Figure 3 and Figure 4 The inner cavity of the hydraulic reciprocating oscillator 5 mentioned in the utility model drives two groups of reciprocating piston rods 6 to reciprocate, and the reciprocating piston rod 6 on the left is located in the first hydraulic cylinder sleeve 7, the first hydraulic cylinder sleeve 7 is connected to the first valve box 10, and the reciprocating piston rod 6 on the right is located in the second hydraulic cylinder sleeve 12, and the second hydraulic cylinder sleeve 12 is connected to the second valve box 11.

[0019] In addition, a dosing pump 13.1 is installed on one side of the liquid storage tank 13 to add the agent into the liquid storage tank 13 to form a low-viscosity oil displacement liquid, and the liquid inlet of the liquid storage tank 13 is connected to the water inlet pipe 14.

[0020] A control room c is installed on one side of the pressure-driven pump a, and a power cable switch is installed in the control room c, which is connected to the distribution box of each pressure-driven pump a through a power cable 15, and each pressure-driven pump a and dosing pump 13.1 are connected to the control room c through a signal control line.

[0021] When the utility model is used, water is injected into the liquid storage tank 13 through the water inlet pipe 14, and then, according to the oil reservoir conditions in the well, a chemical is added through the chemical dosing pump 13.1 to form a low-viscosity oil-displacing liquid. Then, one or more pressure-driven pumps a work, and the high-speed rotational mechanical energy of the motor 1 of the pressure-driven pump a is converted into the pressure energy of the hydraulic oil through the constant-power variable pump 2, and then the hydraulic reciprocating oscillator 5 directly converts the pressure energy of the hydraulic oil into the pressure energy of the working fluid through the reciprocating piston rod 6, and the low-viscosity oil-displacing liquid enters the first valve box 10 and the second valve box 11 through the slurry inlet manifold 9, and under the action of the reciprocating piston rod 6, the high-pressure oil-displacing liquid is sent to the wellhead device b through the high-pressure slurry outlet manifold 8, thereby achieving a higher water injection pressure, which is increased from the 30 MPa water injection pressure of the prior art to 45 MPa or even higher, and also breaks the conventional water injection method and overcomes the long-standing injection and production problem of "no injection and no production" in low-permeability oil reservoir blocks.

[0022] Embodiment 2, a novel pressure-driven water injection and oil production device mentioned in the utility model comprises one or more pressure-driven pumps a, a high-pressure slurry outlet manifold 8, a slurry inlet manifold 9 and a liquid storage tank 13, wherein the pressure-driven pump a comprises an electric motor 1, a constant power variable pump 2, an oil inlet hydraulic hose 3, a hydraulic oil tank 4, a hydraulic reciprocating oscillator 5, a reciprocating piston rod 6, a first hydraulic cylinder sleeve 7, a first valve box 10, a second valve box 11 and a second hydraulic cylinder sleeve 12, wherein the output end of the electric motor 1 is connected to the constant power variable pump 2, and the constant power variable The liquid inlet end of the pump 2 is connected to the lower side of the hydraulic oil tank 4, the liquid outlet end of the constant power variable pump 2 is connected to one end of the hydraulic reciprocating oscillator 5 through the oil inlet hydraulic hose 3, and the other end of the hydraulic reciprocating oscillator 5 is connected to the hydraulic oil tank 4 through a pipeline. The two sides of the hydraulic reciprocating oscillator 5 are respectively connected to the first valve box 10 and the second valve box 11, and the output ends of the first valve box 10 and the second valve box 11 are respectively connected to the wellhead device b through the high-pressure slurry outlet manifold 8, and the input ends are respectively connected to the liquid storage tank 13 through the slurry inlet manifold 9.

[0023] The difference from Example 1 is:

[0024] A sand feeder 13.2 is installed on the other side of the liquid storage tank 13 mentioned in the utility model to form a sand-mixed liquid, which can increase the pore throat radius, increase the percolation distance, redistribute the remaining oil, and quickly and effectively replenish the formation energy after being injected into the oil reservoir downhole, thereby improving the effect of water injection and oil recovery.

[0025] The above is only a preferred embodiment of the utility model. Any person skilled in the art may modify the utility model by using the above technical solution or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent transformation based on the technical solution of the utility model shall fall within the scope of protection claimed by the utility model.

Claims

1. A new type of pressure-driven water injection oil production device, characterized by: The invention comprises at least one pressure-driven pump (a), a high-pressure slurry outlet manifold (8), a slurry inlet manifold (9) and a liquid storage tank (13), wherein the pressure-driven pump (a) comprises an electric motor (1), a constant power variable pump (2), an oil inlet hydraulic hose (3), a hydraulic oil tank (4), a hydraulic reciprocating oscillator (5), a reciprocating piston rod (6), a first hydraulic cylinder sleeve (7), a first valve box (10), a second valve box (11) and a second hydraulic cylinder sleeve (12), wherein the output end of the electric motor (1) is connected to the constant power variable pump (2), and the liquid inlet end of the constant power variable pump (2) is connected to the liquid inlet end of the hydraulic cylinder sleeve (12). At the lower side of the hydraulic oil tank (4), the liquid outlet end of the constant power variable pump (2) is connected to one end of a hydraulic reciprocating oscillator (5) through an oil inlet hydraulic hose (3), and the other end of the hydraulic reciprocating oscillator (5) is connected to the hydraulic oil tank (4) through a pipeline. The two sides of the hydraulic reciprocating oscillator (5) are respectively connected to a first valve box (10) and a second valve box (11), and the output ends of the first valve box (10) and the second valve box (11) are respectively connected to a wellhead device (b) through a high-pressure slurry outlet manifold (8), and the input ends are respectively connected to a liquid storage tank (13) through a slurry inlet manifold (9).

2. The novel pressure-driven water injection oil production device according to claim 1 is characterized in that: The inner cavity of the hydraulic reciprocating oscillator (5) drives two groups of reciprocating piston rods (6) to perform reciprocating motion, and the reciprocating piston rod (6) on the left side is located in the first hydraulic cylinder sleeve (7), and the first hydraulic cylinder sleeve (7) is connected to the first valve box (10), and the reciprocating piston rod (6) on the right side is located in the second hydraulic cylinder sleeve (12), and the second hydraulic cylinder sleeve (12) is connected to the second valve box (11).

3. The novel pressure-driven water injection oil production device according to claim 2 is characterized in that: A dosing pump (13.1) is installed on one side of the liquid storage tank (13) to add a chemical into the liquid storage tank (13) to form a low-viscosity oil displacement liquid, and the liquid inlet of the liquid storage tank (13) is connected to a water inlet pipe (14).

4. The novel pressure-driven water injection oil production device according to claim 3 is characterized in that: A sand replenisher (13.2) is installed on the other side of the liquid storage tank (13) to form a sand-mixed liquid.

5. The novel pressure-driven water injection oil production device according to claim 3 or 4 is characterized in that: A control room (c) is installed on one side of the pressure-driven pump (a), and a power cable switch is installed in the control room (c), which is connected to the distribution box of each pressure-driven pump (a) through a power cable (15).

6. The novel pressure-driven water injection oil production device according to claim 5 is characterized in that: Each pressure-driven pump (a) and dosing pump (13.1) is connected to the control room (c) via a signal control line.

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