Anti-airlock traveling valve device of hollow throttling piston oil well pump

Abstract

The utility model provides a hollow throttle piston oil well pump anti-airlock traveling valve device, which comprises a traveling valve cover, a traveling valve ball, a sealing sleeve and a hollow piston, the top end of the traveling valve cover is provided with a sucker rod connector, the bottom end of the traveling valve cover is provided with a plunger connector, the top of the traveling valve cover is provided with an oil outlet hole, and the hollow piston is arranged in the oil outlet hole. The sealing sleeve is fixedly arranged in the traveling valve cover in a sleeved mode, the sealing sleeve comprises a ball seat, a guide sliding channel and a limiting step which are sequentially connected from top to bottom, the ball seat is provided with an inverted-cone-shaped sealing face corresponding to the traveling valve ball, and a plurality of overflowing grooves are formed in the inner wall of the guide sliding channel; a positioning disc matched with the guide sliding channel is arranged at the bottom end of the hollow piston, and a throttling channel is formed in the center axis of the hollow piston. The anti-airlock traveling valve device of the hollow throttling piston oil well pump has the advantages of being scientific in design, capable of relieving the airlock phenomenon, simple in structure and long in service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil and natural gas exploitation, and more particularly to a hollow throttling piston oil well pump anti-gas lock traveling valve device. BACKGROUND

[0002] In the exploitation process of high gas content crude oil, with the decrease of the oil layer pressure, the natural gas in the crude oil will be largely released, the gas oil ratio is increased, and the natural gas is largely entered into the pump cylinder, which can reduce the fullness of the pump cylinder, and in severe cases, can cause the "gas lock" phenomenon, resulting in the shutdown of the oil well.

[0003] The existing anti-gas lock design can be roughly divided into friction pair type and pump cylinder forced exhaust type. The friction pair type anti-gas lock device uses the friction pair design to keep the traveling valve closed during the upstroke and forcedly opened under the action of the friction pair during the downstroke, so that the liquid in the pump is entered into the pump cylinder, and the gas is squeezed into the oil pipe from the pump cylinder, thereby achieving the purpose of eliminating the "gas lock". The durability and reliability of the friction pair type anti-gas lock device are difficult to guarantee, and the load of the oil pumping rod string is increased to some extent. The pump cylinder forced exhaust type anti-gas lock device uses a complex pump cylinder structure or flow channel design to force the natural gas in the pump cylinder to be discharged to the oil pipe or the annular space between the oil pipe and the casing, thereby reducing the fullness of the gas in the pump cylinder, increasing the fullness of the liquid, and reducing the risk of "gas lock". The pump cylinder forced exhaust type device generally has the problems of complex structure design and high process implementation cost.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. SUMMARY

[0005] The utility model aims at the deficiency of prior art, and provides an anti-gas lock traveling valve device for hollow throttling piston oil well pump, which is scientific in design, can eliminate the gas lock phenomenon, simple in structure, long in service life.

[0006] In order to achieve the above object, the utility model adopts the technical scheme: a hollow throttling piston oil well pump anti-air lock traveling valve device, including traveling valve cover, traveling valve ball that is arranged in the traveling valve cover inside, sealing sleeve and hollow piston, the top of traveling valve cover is provided with sucker rod connector, the bottom is provided with plunger connector, the top of traveling valve cover is provided with oil outlet hole, the sealing sleeve is fixedly covered in the traveling valve cover inside, the sealing sleeve includes ball seat, guide sliding channel and limit step that are sequentially connected from top to bottom, the ball seat is provided with inverted conical sealing surface corresponding traveling valve ball, a plurality of overflow grooves are formed in the inner wall of guide sliding channel; Hollow piston bottom is provided with the positioning disc that is matched with the guide sliding channel, the center axis of hollow piston is provided with throttling channel;When the positioning disc falls on the limit step, the traveling valve ball falls on the inverted conical sealing surface and blocks the throttling channel top;When the positioning disc rises to the overflow groove, under the common action of throttling channel and overflow groove output fluid, the traveling valve ball is completely opened.

[0007] Based on the above, the ball seat is also provided with a cylindrical portion, the bottom end of the cylindrical portion is connected with the top end of the inverted conical sealing surface, and the inner diameter of the cylindrical portion is equal to the outer diameter of the traveling valve ball.

[0008] Based on the above, the top of the cylindrical portion is provided with a guide inclined surface for guiding the sliding of the traveling valve ball.

[0009] Based on the above, the overflow groove is provided with six channels, and the six channels are evenly arranged on the inner wall of the guide sliding channel.

[0010] Based on the above, the top end surface of the hollow piston is inclined towards the bottom periphery.

[0011] Compared with the prior art, the utility model has substantial features and progress, specifically, the utility model is provided with the throttling channel, the positioning disc and the overflow groove, during the upstroke process of the oil well pump, the gravity of the traveling valve ball and the liquid column above it and the gravity of the hollow piston are utilized, so that self-locking can be realized, thereby pushing the fluid in the upper part of the traveling valve device out; during the downstroke process of the oil well pump, the pressure difference generated at both ends of the hollow piston is utilized, so that the fluid channel can be gradually opened, the fluid in the pump enters the upper space of the traveling valve device, and the air lock is released; the utility model has the advantages of scientific design, air lock release, simple structure and long service life.

[0012] Furthermore, the cylindrical portion serves to guide and seal the moving valve ball; the inclined guide surface makes it easier for the moving valve ball to fall into the cylindrical portion; the outer periphery of the top surface of the hollow piston is inclined towards the bottom, increasing the flow area at the output end of the flow channel, which can accelerate the speed at which fluid enters the upper space of the moving valve device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the hollow throttling piston oil pump anti-airlock floating valve device in the upstroke state of the oil pump.

[0014] Figure 2 This is a schematic diagram of the hollow throttling piston oil pump anti-airlock floating valve device in the intermediate state of this utility model.

[0015] Figure 3 This is a schematic diagram of the hollow throttling piston oil pump anti-airlock traveling valve device in the downstroke state of the oil pump.

[0016] Figure 4 yes Figure 2 Cross-sectional view at point AA.

[0017] In the diagram: 1. Sucker rod; 2. Sucker rod connector; 3. Oil outlet; 4. Traveling valve cover; 5. Traveling valve ball; 6. Sealing sleeve; 7. Ball seat; 8. Inverted conical sealing surface; 9. Hollow piston; 10. Throttling channel; 11. Guide sliding channel; 12. Flow groove; 13. Positioning disc; 14. Limiting step; 15. Plunger connector; 16. Cylindrical section; 17. Guide ramp. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] like Figures 1-4 As shown, a hollow throttling piston oil pump anti-airlock traveling valve device includes a traveling valve cover 4, a traveling valve ball 5 disposed inside the traveling valve cover 4, a sealing sleeve 6, and a hollow piston 9. The top of the traveling valve cover 4 is provided with a sucker rod connector 2, and the bottom is provided with a plunger connector 15. The top of the traveling valve cover 4 is provided with an oil outlet hole 3. The sucker rod connector 2 is used to connect the sucker rod 1, and the plunger connector 15 is used to connect the plunger.

[0020] The sealing sleeve 6 is fixedly sleeved inside the traveling valve cover 4, and the sealing sleeve 6 comprises, from top to bottom, a ball seat 7, a guide sliding channel 11 and a limiting step 14 connected in sequence, the ball seat 7 is provided with an inverted conical sealing surface 8 corresponding to the traveling valve ball 5, and six flow grooves 12 are uniformly arranged on the inner wall of the guide sliding channel 11.

[0021] The bottom end of the hollow piston 9 is provided with a positioning disc 13 matched with the guide sliding channel 11, a distance is left between the bottom end of the flow groove 12 and the limiting step 14, the flow groove 12 keeps no liquid state when the positioning disc 13 rises in the distance, and a throttling channel 10 is arranged at the central axis of the hollow piston 9. When the positioning disc 13 falls on the limiting step 14, the traveling valve ball 5 falls on the inverted conical sealing surface 8 and blocks the top end of the throttling channel 10; when the positioning disc 13 rises to the flow groove 12, the traveling valve ball 5 is completely opened under the joint action of the throttling channel 10 and the flow groove 12 output fluid; the top end surface of the hollow piston 9 is obliquely arranged towards the bottom, so as to increase the flow area of the output end of the flow groove 12.

[0022] The ball seat 9 is further provided with a cylindrical portion 16, the bottom end of the cylindrical portion 16 is connected with the top end of the inverted conical sealing surface 8, the inner diameter of the cylindrical portion 16 is equal to the outer diameter of the traveling valve ball 5, and the top of the cylindrical portion 16 is provided with a guide inclined surface 17 guiding the sliding of the traveling valve ball 5; when the traveling valve ball 5 falls back, the guide inclined surface 17 can make it fall into the cylindrical portion 16 more easily, and the cylindrical portion 16 plays a guiding and sealing role on the traveling valve ball 5.

[0023] Working principle:

[0024] When the oil pump is in the upstroke, the sucker rod 1 drives the traveling valve cover 4 and the plunger connected with the plunger connecting head 15 below through the sucker rod connecting head 2 to move upwards along the stroke direction, under the gravity and inertia of the traveling valve ball 5 and the hollow piston 9, the traveling valve ball 5 falls along the guide sliding channel 11 to the limiting step 14 under the joint action of the gravity and inertia of the liquid column above the traveling valve ball 5; the traveling valve ball 5 falls to the fluid passage sealed downwards under the joint action of the gravity and inertia of the upper liquid column and itself; the plunger continues to move upwards to push the fluid in the space above the traveling valve device to be discharged outward.

[0025] When the pump is in the down stroke, the sucker rod 1 pushes the traveling valve cover 4 and the plunger connected by the plunger connector 15 down through the sucker rod connector 2, and the fluid in the pump barrel at the bottom of the traveling valve device is compressed. Due to the sealing effect of the positioning disc 13 on the fluid in the pump barrel, the fluid in the pump barrel passes through the throttling channel 10 to generate a pressure difference at both ends of the hollow piston 9, which pushes the hollow piston 9 to move upward along the guide sliding channel 11, and a large flow rate is generated at the outlet of the throttling channel 10. When the bottom surface of the positioning disc 13 reaches the bottom surface of the overflow groove 12, the traveling valve ball 5 is forced to open under the pushing action of the fluid and the hollow piston 9 at the outlet of the throttling channel 10. The hollow piston 9 continues to move upward under the action of the pressure difference at both ends, and the fluid in the pump passes through the overflow groove 12, bypasses the traveling valve ball 5, passes through the oil outlet hole 3 on the traveling valve cover 4, enters the upper space of the traveling valve device, and the gas lock is released.

[0026] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical scheme of the present application, all should be covered in the technical scheme range of the present application claimed by the present application.

Claims

1. A hollow throttling piston oil well pump anti-gas lock traveling valve device, comprising a traveling valve cover and a traveling valve ball arranged inside the traveling valve cover, a top end of the traveling valve cover is provided with a sucker rod connector, a bottom end of the traveling valve cover is provided with a plunger connector, and a top portion of the traveling valve cover is provided with an oil outlet hole, characterized in that: It also includes a sealing sleeve and a hollow piston, the sealing sleeve is fixedly sleeved inside the traveling valve cover, the sealing sleeve includes a ball seat, a guide sliding channel and a limiting step connected in sequence from top to bottom, the ball seat is provided with an inverted conical sealing surface corresponding to the traveling valve ball, a plurality of flow grooves are formed in the inner wall of the guide sliding channel; the bottom end of the hollow piston is provided with a positioning disc matched with the guide sliding channel, a throttling channel is formed in the central shaft of the hollow piston; when the positioning disc falls on the limiting step, the traveling valve ball falls on the inverted conical sealing surface and blocks the top end of the throttling channel; when the positioning disc rises to the flow groove, under the joint action of the throttling channel and the flow groove output fluid, the traveling valve ball is completely opened. ​ 2. The anti-gas lock traveling valve assembly for a hollow plug pump as set forth in claim 1, wherein: The ball seat is also provided with a cylindrical part, the bottom end of the cylindrical part is connected with the top end of the inverted conical sealing surface, and the inner diameter of the cylindrical part is equal to the outer diameter of the traveling valve ball.

3. The anti-gas lock traveling valve assembly for a hollow plug pump as set forth in claim 2, wherein: The top of the cylindrical part is provided with a guide inclined surface for guiding the sliding of the traveling valve ball.

4. The anti-gas lock traveling valve assembly for a hollow plug pump as set forth in any of claims 1-3, characterized in that: The flow grooves are six in total, and the six flow grooves are evenly formed on the inner wall of the guide sliding channel.

5. The anti-gas lock traveling valve assembly for a hollow plug piston oil well pump of claim 4 wherein: The top end surface of the hollow piston is inclined towards the bottom periphery.

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