Oil field water injection well pressure reducing and injection increasing device with adjustable injection rate

Abstract

The oil field water injection well pressure reducing and injection increasing device comprises an upper box body and a lower box body, two supporting frames are installed on the upper box body, a rotating chamber and a movable chamber are arranged in the upper box body, a reciprocating lead screw is arranged in the rotating chamber in a rotating mode, a piston plate is arranged in the movable chamber, and a piston rod is arranged in the piston plate. The reciprocating lead screw is connected with the piston plate through a connecting mechanism, and a driving motor is arranged on the upper box body through a fixing mechanism. Through the arrangement of the lower box body, the stirring shaft and the stirring rod, mild stirring treatment of a medicament and clear water is realized, and materials can be uniformly stirred, so that the using effect of the materials is improved. By arranging a reciprocating lead screw, a connecting frame, a piston plate, a liquid inlet pipeline and a connecting pipeline, indirect suction and feeding of chemicals and clear water into the lower box body are achieved, and the situation that the stirring and mixing effect is affected by continuous adding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield development engineering, in particular to a pressure-reducing and injection-increasing device for an oilfield water injection well with adjustable injection volume. Background Art

[0002] With the rapid development of my country's economy, the demand for petroleum energy has gradually increased. With the gradual development of oil fields, oil field exploitation has become increasingly difficult. Due to the development of natural fractures or poor interlayer stress, increasing the scale of fracturing can easily connect the water layer in the formation vertically, resulting in the problem of rapid water seepage in oil wells. Some wells even experienced violent flooding in the early stages of production, seriously damaging the development of oil fields. In order to improve the efficiency of oil extraction and ensure the long-term development of oil fields, it is necessary to reduce pressure and increase injection during oil field exploitation to achieve oil well exploitation.

[0003] At present, when the oilfield pressure reduction and injection device is used, the added reagent cannot be fully mixed, resulting in insufficient dissolution of the reagent, thereby reducing the use effect of the reagent. In addition, the traditional pressure reduction and injection device is relatively complex in structure, high in cost, and poor in flexibility, resulting in low work efficiency. In order to improve it, a pressure reduction and injection device for oilfield water injection wells with adjustable injection volume is proposed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a pressure-reducing and injection-increasing device for an oil field water injection well with adjustable injection volume.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pressure-reducing and injection-increasing device for oilfield water injection wells with adjustable injection volume comprises an upper box body and a lower box body, two support frames are installed on the upper box body, a rotating chamber and an active chamber are arranged inside the upper box body, a reciprocating screw is rotatably arranged in the rotating chamber, a piston plate is arranged in the active chamber, the reciprocating screw is connected to the piston plate through a connecting mechanism, a driving motor is arranged on the upper box body through a fixing mechanism, the driving motor is connected to the reciprocating screw through a rotating mechanism, a stirring shaft connected to the driving motor is arranged in the lower box body, a plurality of stirring rods are arranged on the stirring shaft, a liquid inlet pipe connected to the active chamber is arranged on the upper box body, the active chamber is connected to the lower box body through a connecting pipe, and an injection pipe is installed on the lower box body.

[0007] Preferably, the connection mechanism comprises a connection frame threadedly mounted on the reciprocating screw, the connection frame is U-shaped and both ends are connected to the piston plate.

[0008] Preferably, the fixing mechanism comprises a fixing frame arranged on the upper end surface of the upper box body, and the driving motor is mounted on the fixing frame.

[0009] Preferably, the rotating mechanism comprises a driving gear arranged on the output shaft of the driving motor, and a transmission gear connected to the reciprocating screw is provided on the upper box body, and the driving gear is meshed with the transmission gear.

[0010] Preferably, a first valve is provided in the liquid inlet pipe, a second valve is provided in the connecting pipe, the first valve and the second valve are both one-way valves, and an electric valve is provided in the injection pipe.

[0011] Preferably, the interior of the lower box is conical, and the lengths of the plurality of stirring rods decrease from top to bottom.

[0012] Beneficial effects of the utility model:

[0013] 1. By setting up the lower box, stirring shaft and stirring rod, the gentle stirring treatment of the reagent and the clean water is realized, and the materials can be stirred evenly, thereby improving the use effect of the materials.

[0014] 2. By setting up a reciprocating screw, a connecting frame, a piston plate, a liquid inlet pipe and a connecting pipe, the indirect suction and delivery of the medicine and clean water into the lower box are realized, avoiding continuous addition affecting the stirring and mixing effect.

[0015] 3. By setting the driving gear and the transmission gear, the synchronous rotation of the stirring shaft and the reciprocating screw is realized, and the simultaneous suction, discharge and stirring and mixing of the materials are realized, ensuring the linkage and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a pressure-reducing and injection-increasing device for oil field water injection wells with adjustable injection volume proposed by the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure at A;

[0018] Figure 3 for Figure 1 Schematic diagram of the vertical section structure.

[0019] In the figure: 1 upper box body, 2 support frame, 3 lower box body, 4 injection pipe, 5 liquid inlet pipe, 6 fixed frame, 7 drive motor, 8 driving gear, 9 transmission gear, 10 rotating chamber, 11 activity chamber, 12 reciprocating screw, 13 piston plate, 14 connecting frame, 15 connecting pipe, 16 stirring shaft, 17 stirring rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-3 A pressure-reducing and injection-increasing device for oilfield water injection wells with adjustable injection volume comprises an upper box body 1 and a lower box body 3. Two support frames 2 are installed on the upper box body 1. A rotating chamber 10 and an active chamber 11 are arranged inside the upper box body 1. A reciprocating screw 12 is rotatably arranged in the rotating chamber 10. A piston plate 13 is arranged in the active chamber 11. The reciprocating screw 12 is connected to the piston plate 13 through a connecting mechanism. A driving motor 7 is arranged on the upper box body 1 through a fixing mechanism. The driving motor 7 is connected to the reciprocating screw 12 through a rotating mechanism. A stirring shaft 16 connected to the driving motor 7 is arranged in the lower box body 3. A plurality of stirring rods 17 are arranged on the stirring shaft 16. A liquid inlet pipe 5 communicating with the active chamber 11 is arranged on the upper box body 1. The active chamber 11 is connected to the lower box body 3 through a connecting pipe 15. An injection pipe 4 is installed on the lower box body 3.

[0022] The connecting mechanism includes a connecting frame 14 threadedly mounted on the reciprocating screw 12. The connecting frame 14 is U-shaped and both ends are connected to the piston plate 13. Both ends of the connecting frame 14 slide through the inner wall of the rotating chamber 10 and extend into the active chamber 11. Therefore, it has its own limit and will not rotate with the reciprocating screw 12.

[0023] The fixing mechanism includes a fixing frame 6 arranged on the upper end surface of the upper box body 1, and the drive motor 7 is installed on the fixing frame 6. As shown in the figure, the fixing frame 6 is L-shaped, which realizes the stable placement of the drive motor 7, and the fixing frame 6 and the upper box body 1 as well as the fixing frame 6 and the drive motor 7 are all welded.

[0024] The rotating mechanism includes a driving gear 8 arranged on the output shaft of the driving motor 7, and a transmission gear 9 connected to the reciprocating screw 12 is provided on the upper box body 1. The driving gear 8 is meshed with the transmission gear 9. The above-mentioned driving gear 8 and the transmission gear 9 realize the power transmission of the driving motor 7, and can realize the synchronous rotation of the two reciprocating screws 12 after the driving motor 7 is started.

[0025] A first valve is provided in the liquid inlet pipe 5, and a second valve is provided in the connecting pipe 15. Both the first valve and the second valve are one-way valves. An electric valve is provided in the injection pipe 4. The one-way valve realizes one-way flow of the liquid, and the electric valve realizes the opening and closing operation of the injection pipe 4.

[0026] The interior of the lower box body 3 is conical, and the lengths of the multiple stirring rods 17 decrease from top to bottom. The above-mentioned shape and structure ensure the smoothness of the falling of the materials.

[0027] When the utility model is used, the two liquid inlet pipes 5 enter the medicine storage tank and the clean water storage tank respectively. When the equipment is working, the driving motor 7 is started, and the driving motor 7 drives the active gear 8 to rotate. The active gear 8 cooperates with the transmission gear 9 to drive the reciprocating screw 12 to rotate. When the reciprocating screw 12 rotates, the connecting frame 14 can drive the piston plate 13 to reciprocate up and down in the activity chamber 11. When the piston plate 13 rises, the medicine and clean water can be sucked into the activity chamber 11 with the help of the liquid inlet pipe 5. When the piston plate 13 descends, the above-mentioned medicine and clean water can be sent into the lower box body 3 through the connecting pipe 15. When the driving motor 7 is started, the stirring rod 17 can also be driven to rotate with the help of the stirring shaft 16 to achieve the stirring and mixing of the medicine and clean water entering therein. When the driving motor 7 is stopped and the electric valve is opened, the injection operation of the above-mentioned materials can be achieved through the injection pipe 4.

[0028] In this solution, the rotation speed of the driving motor 7 can be changed within a fixed time, thereby changing the suction and discharge amount of the agent and clean water within the fixed time, thereby changing the amount of the mixed material, and further realizing the adjustment of the injection amount.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure-reducing and injection-increasing device for an oilfield water injection well with adjustable injection volume, comprising an upper box (1) and a lower box (3), characterized in that: Two support frames (2) are installed on the upper box body (1). A rotating chamber (10) and an active chamber (11) are provided inside the upper box body (1). A reciprocating screw (12) is rotatably provided inside the rotating chamber (10). A piston plate (13) is provided inside the active chamber (11). The reciprocating screw (12) is connected to the piston plate (13) via a connecting mechanism. A driving motor (7) is provided on the upper box body (1) via a fixing mechanism. The driving motor (7) is connected to the reciprocating screw (12) via a rotating mechanism. A stirring shaft (16) connected to the driving motor (7) is provided inside the lower box body (3). A plurality of stirring rods (17) are provided on the stirring shaft (16). A liquid inlet pipe (5) communicating with the active chamber (11) is provided on the upper box body (1). The active chamber (11) is connected to the lower box body (3) via a connecting pipe (15). An injection pipe (4) is installed on the lower box body (3).

2. The device for reducing pressure and increasing injection of oil field water injection wells with adjustable injection volume according to claim 1, characterized in that: The connection mechanism comprises a connection frame (14) threadedly mounted on a reciprocating screw (12); the connection frame (14) is U-shaped and both ends are connected to a piston plate (13).

3. The device for reducing pressure and increasing injection of oil field water injection wells with adjustable injection volume according to claim 2, characterized in that: The fixing mechanism comprises a fixing frame (6) arranged on the upper end surface of the upper box body (1), and the driving motor (7) is mounted on the fixing frame (6).

4. The device for reducing pressure and increasing injection of oil field water injection wells with adjustable injection volume according to claim 3, characterized in that: The rotating mechanism comprises a driving gear (8) arranged on the output shaft of the driving motor (7), and a transmission gear (9) connected to the reciprocating screw (12) is arranged on the upper box body (1), and the driving gear (8) is meshed with the transmission gear (9).

5. The device for reducing pressure and increasing injection of oil field water injection wells with adjustable injection volume according to claim 4, characterized in that: A first valve is provided in the liquid inlet pipe (5), a second valve is provided in the connecting pipe (15), the first valve and the second valve are both one-way valves, and an electric valve is provided in the injection pipe (4).

6. The device for reducing pressure and increasing injection of oil field water injection wells with adjustable injection volume according to claim 5, characterized in that: The interior of the lower box (3) is conical, and the lengths of the plurality of stirring rods (17) decrease from top to bottom.

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