Downhole rotational flow gas guiding and liquid increasing plunger valve assembly

Abstract

The utility model relates to an underground rotational flow gas guiding and liquid increasing plunger valve assembly, and belongs to the technical field of oil exploitation, the underground rotational flow gas guiding and liquid increasing plunger valve assembly comprises a cylinder body and a plunger rod slidably inserted in the cylinder body, the plunger rod is hollow, and a first flow blocking assembly is arranged at the end, away from the plunger rod, in the cylinder body; a second flow choking assembly is arranged in the end, away from the first flow choking assembly, of the plunger rod, and air guide assemblies are further arranged in the cylinder body and the plunger rod. The device has the effects of reducing the liquid flow resistance and increasing the liquid flow speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil exploitation, in particular to a downhole cyclone gas-guiding liquid-boosting plunger valve assembly. BACKGROUND

[0002] In the process of oil and gas well development, when the oil or gas production in the well is low and the pressure in the well is insufficient, a large amount of liquid cannot be lifted to the ground, which will form a certain height of liquid accumulation at the bottom of the well, thereby reducing the productivity of the oil and gas well, and even causing the oil and gas well to stop flowing.

[0003] The plunger is a commonly used liquid lifting device. In the open well state, the plunger ascends and lifts the liquid accumulation above it upward to discharge to the outside of the oil and gas well. In the closed well state, the plunger descends to the bottom of the well. In this way, the liquid accumulation at the bottom of the well is continuously lifted.

[0004] However, in the process of liquid lifting, the gas mixed in the liquid hinders the lifting of the liquid, reducing the efficiency of the liquid lifting. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the flow speed of the liquid, the present application provides a downhole cyclone gas-guiding liquid-boosting plunger valve assembly.

[0006] The downhole cyclone gas-guiding liquid-boosting plunger valve assembly provided by the present application adopts the following technical scheme:

[0007] A downhole cyclone gas-guiding liquid-boosting plunger valve assembly, comprising a cylinder body and a plunger rod slidingly inserted into the cylinder body, the plunger rod being hollow, a first flow-blocking assembly being arranged at one end of the plunger rod away from the cylinder body, a second flow-blocking assembly being arranged inside the end of the plunger rod away from the first flow-blocking assembly, and a gas-guiding assembly being further arranged inside the cylinder body and the plunger rod.

[0008] By adopting the above technical scheme, the plunger rod slides in the cylinder body, thereby changing the distance between the first flow-blocking assembly and the second flow-blocking assembly. When the plunger rod slides towards the inside of the cylinder body, the first flow-blocking assembly is closed and the second flow-blocking assembly is opened, and the liquid inside the plunger rod is squeezed and flows out through the second flow-blocking assembly. When the plunger rod slides away from the cylinder body, the first flow-blocking assembly is opened and the second flow-blocking assembly is closed, and the liquid outside flows into the inside of the cylinder body and the plunger rod under the action of the pressure difference. In this process, the gas-guiding assembly concentrates and guides the gas mixed in the liquid, reduces the obstruction of the gas to the hydraulic flow into or out of the inside of the cylinder body and the plunger rod, and thereby improves the flow speed of the liquid.

[0009] Optionally, the first flow resistance component comprises a first flow resistance ring arranged on the inner wall of the cylinder body, and a piston is arranged on one side of the first flow resistance ring close to the plunger rod to block the first flow resistance ring; the second flow resistance component comprises a second flow resistance ring arranged in the plunger rod, and a piston is arranged on one side of the second flow resistance ring away from the cylinder body to block the second flow resistance ring.

[0010] By adopting the above technical scheme, when the plunger rod slides into the cylinder body, the pressure in the cylinder body and the plunger rod increases, the piston on the second flow resistance ring is pushed out and separated from the second flow resistance ring, at this time, the liquid in the cylinder body and the plunger rod flows out through the second flow resistance ring, when the plunger rod slides out of the cylinder body, the piston on the second flow resistance ring is pressed at the second flow resistance ring to block the second flow resistance ring, at the same time, the pressure in the cylinder body and the plunger rod decreases, the piston on the first flow resistance ring is extruded by the outside to separate from the first flow resistance ring, and the outside liquid enters the cylinder body and the plunger rod through the first flow resistance ring, so as to repeat the above process to realize the rapid flow of the liquid.

[0011] Optionally, the gas guide component comprises a gas guide pipe opposite the center of the first flow resistance ring or the second flow resistance ring, and a connecting plate is arranged on the periphery of the gas guide pipe and fixed on the inner wall of the cylinder body or the plunger rod.

[0012] By adopting the above technical scheme, the gas guide pipe is located at the center, so that the gas can be collected at the center and flow through the gas guide pipe, the gas and the liquid are separated, the flow resistance of the liquid is reduced, and the flow speed of the liquid is improved.

[0013] Optionally, the connecting plates are arranged in a spiral shape, and the connecting plates on the same gas guide pipe have the same spiral direction.

[0014] By adopting the above technical scheme, the spiral connecting plates provide a guide function for the liquid, so that the liquid moves spirally, the gas is separated to the center position and flows through the gas guide pipe, thereby forming an air channel, further improving the degree of gas-liquid separation, and reducing the resistance of the gas to the flow of the liquid.

[0015] Optionally, a plurality of through holes are arranged on the periphery of the gas guide pipe, and the through holes are in communication between the inside and the outside of the gas guide pipe.

[0016] By adopting the above technical scheme, the gas separated from the liquid can enter the gas guide pipe through the through holes, and the plurality of through holes can collect more gas, so as to reduce the content of the gas in the liquid and improve the flow speed of the liquid.

[0017] In summary, the present application has at least one of the following beneficial technical effects:

[0018] The gas guide component concentrates and guides the mixed gas in the liquid, reduces the resistance of the gas to the flow of the liquid into or out of the cylinder body and the plunger rod, and further improves the flow speed of the liquid.

[0019] The helical connecting plate and the gas guide pipe with the through hole separate the gas and liquid, the outside is the rotating flow liquid, and the inside is the gas channel, so that the liquid can quickly pass through the first flow resistance ring and the second flow resistance ring, thereby improving the flow speed of the liquid. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the internal structure of the cylinder body of the embodiment of the present application.

[0021] Figure 2 is a schematic diagram of the internal structure of the plunger rod of the embodiment of the present application.

[0022] Label explanation: 1, cylinder body; 2, plunger rod; 3, first flow resistance assembly; 31, first flow resistance ring; 32, piston; 4, second flow resistance assembly; 41, second flow resistance ring; 5, gas guide assembly; 51, gas guide pipe; 511, through hole; 52, connecting plate. DETAILED DESCRIPTION

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] The embodiment of the present application discloses a downhole rotating flow gas guide liquid increasing plunger valve assembly. Referring to Figure 1 A downhole rotating flow gas guide liquid increasing plunger valve assembly, comprising a cylinder body 1, the cylinder body 1 is provided with a hollow plunger rod 2 at one end, the plunger rod 2 is inserted into the cylinder body 1 at one end and is in sliding connection with the cylinder body 1, a first flow resistance assembly 3 is arranged at one end of the cylinder body 1 away from the plunger rod 2, a second flow resistance assembly 4 is arranged in the inside of one end of the plunger rod 2 away from the first flow resistance assembly 3, and a gas guide assembly 5 is further arranged in the inside of the cylinder body 1 and the plunger rod 2.

[0025] The plunger rod 2 reciprocally slides in the cylinder body 1, in this process, the first flow resistance assembly 3 and the second flow resistance assembly 4 are close to or away from each other, when the plunger rod 2 slides towards the inside of the cylinder body 1, the first flow resistance assembly 3 is closed, the second flow resistance assembly 4 is opened, the liquid in the inside of the plunger rod 2 is extruded and flows out through the second flow resistance assembly 4, when the plunger rod 2 slides away from the cylinder body 1, the first flow resistance assembly 3 is opened, the second flow resistance assembly 4 is closed, the liquid outside flows into the inside of the cylinder body 1 and the plunger rod 2 under the action of the pressure difference, in this process, the gas and liquid are separated by the gas guide assembly 5 at the first flow resistance assembly 3 and the second flow resistance assembly 4, so that the gas mixed in the liquid is concentrated and guided, the obstruction of the gas to the hydraulic flow into or out of the inside of the cylinder body 1 and the plunger rod 2 is reduced, and the liquid can quickly pass through the first flow resistance assembly 3 or the second flow resistance assembly 4.

[0026] The first flow resistance assembly 3 comprises a first flow resistance ring 31 fixed on the inner wall of the cylinder body 1, which is arranged obliquely on the inner wall of the side of the plunger rod 2 close to the first flow resistance ring 31, and further comprises a spherical piston 32 abutting on the oblique inner wall of the first flow resistance ring 31 to block the first flow resistance ring 31, and the second flow resistance assembly 4 comprises a second flow resistance ring 41 fixed on the inside of the plunger rod 2, which is identical in structure to the first flow resistance ring 31 and is also blocked by the spherical piston 32, and further comprises a limiting block mounted on the end of the plunger rod 2 to prevent the piston 32 from being separated, and the limiting block is provided with a flow guide hole.

[0027] When the plunger rod 2 slides into the cylinder body 1, the pressure inside the cylinder body 1 and the plunger rod 2 increases, the piston 32 on the second flow resistance ring 41 is pushed out and separated from the second flow resistance ring 41, at this time, the liquid inside the cylinder body 1 and the plunger rod 2 flows out through the second flow resistance ring, and flows out of the plunger rod 2 through the flow guide hole, when the plunger rod 2 slides out of the cylinder body 1, the piston 32 on the second flow resistance ring 41 is pressed on the second flow resistance ring 41 to block the second flow resistance ring 41, at the same time, the pressure inside the cylinder body 1 and the plunger rod 2 decreases, the piston 32 on the first flow resistance ring 31 is extruded by the outside, so that the piston 32 is separated from the first flow resistance ring 31, and the outside liquid enters the inside of the cylinder body 1 and the plunger rod 2 through the first flow resistance ring 31, so as to realize the rapid flow of the liquid.

[0028] The air guide assembly 5 close to the first flow resistance ring 31 comprises air guide pipes 51 arranged on both sides of the first flow resistance ring 31, the air guide pipes 51 are opposite to the center of the first flow resistance ring 31, the air guide pipes 51 are fixedly connected with a plurality of connecting plates 52 on the side away from the air guide pipes 51, the connecting plates 52 are arranged in a spiral shape, and the connecting plates 52 on the same air guide pipe 51 have the same spiral direction. The air guide assembly 5 close to the second flow resistance ring 41 is identical in structure to the air guide assembly 5 close to the first flow resistance ring 31.

[0029] The spiral connecting plates 52 provide a guide function for the liquid, so that the liquid moves spirally, so that the gas and the liquid are separated, the liquid is on the outside, and the gas is separated to the center position, the air guide pipes 51 are located at the center, so that the gas can be collected at the center and flow through the air guide pipes 51, thereby forming an air channel, thereby reducing the flow resistance of the liquid and improving the flow speed of the liquid.

[0030] The air guide pipes 51 are provided with a plurality of through holes 511 on the side, which communicate the inside and the outside of the air guide pipes 51. The gas separated from the liquid can enter the air guide pipes 51 through the through holes 511, and the plurality of through holes 511 can collect more gas, thereby reducing the content of the gas in the liquid, thereby reducing the resistance of the gas to the flow of the liquid.

[0031] The implementation principle of the downhole cyclone gas guiding and liquid increasing plunger valve assembly of the embodiment of the application is as follows: the reciprocating relative movement between the plunger rod 2 and the cylinder body 1, when the plunger rod 2 moves to the outside of the cylinder body 1, the liquid extrudes the piston 32 at the first flow resistance ring 31 and enters the inside of the cylinder body 1, at the same time, the connecting plate 52 provides a guiding action for the flowing liquid, so that the liquid cyclones, the gas is separated to the center, the gas enters the gas guiding pipe 51 through the through hole 511 and forms a gas guiding pipe 51 along the gas guiding pipe 51, thereby the cyclone liquid can quickly enter the cylinder body 1, and similarly, when the plunger rod 2 moves to the inside of the cylinder body 1, the first flow resistance ring 31 is blocked by the piston 32, the liquid is separated from the cylinder body 1 by extruding the piston 32 at the second flow resistance ring 41.

[0032] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: all equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A downhole rotational flow gas and liquid boosting plunger valve assembly characterized by: The application relates to a cylinder (1) and a plunger rod (2) slidingly inserted into the cylinder (1), the plunger rod (2) being hollow, a first flow blocking assembly (3) being arranged at one end of the plunger rod (2) away from the cylinder (1), a second flow blocking assembly (4) being arranged inside the plunger rod (2) away from the first flow blocking assembly (3), and a gas guiding assembly (5) being arranged inside the cylinder (1) and the plunger rod (2).

2. A downhole rotational flow gas-liquid boosting plug valve assembly according to claim 1, characterized in that: The first flow blocking assembly (3) comprises a first flow blocking ring (31) arranged on the inner wall of the cylinder (1), a piston (32) being arranged on the side of the first flow blocking ring (31) close to the plunger rod (2) to block the first flow blocking ring (31), the second flow blocking assembly (4) comprises a second flow blocking ring (41) arranged inside the plunger rod (2), and a piston (32) is arranged on the side of the second flow blocking ring (41) away from the cylinder (1) to block the second flow blocking ring (41).

3. A downhole rotational flow gas-liquid boosting plug valve assembly according to claim 2, characterized in that: The gas guiding assembly (5) comprises a gas guiding pipe (51) arranged opposite the center of the first flow blocking ring (31) or the second flow blocking ring (41), the gas guiding pipe (51) is provided with a connecting plate (52) on the peripheral side, and the connecting plate (52) is fixed on the inner wall of the cylinder (1) or the inner wall of the plunger rod (2).

4. A downhole rotational flow gas-liquid boosting plug valve assembly according to claim 3, characterized in that: The connecting plate (52) is arranged in a spiral shape, and the connecting plates (52) on the same gas guiding pipe (51) have the same spiral direction.

5. A downhole rotational flow gas-liquid boosting plug valve assembly according to claim 4, characterized in that: A plurality of through holes (511) are arranged on the peripheral side of the gas guiding pipe (51), and the through holes (511) are connected between the inside and the outside of the gas guiding pipe (51).

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