Sand blockage prevention bailing structure for oil-water well

Abstract

The utility model relates to the field of oil production engineering, and discloses an oil-water well sand blocking prevention bailing structure which comprises a sand blocking prevention bailing pump, a valve pen point assembly is fixedly connected in the sand blocking prevention bailing pump, a desilting oil pipe is arranged on the outer wall of the valve pen point assembly, a filter is fixedly connected in the desilting oil pipe, and the filter is arranged on the inner side of the sand blocking prevention bailing pump. A fixed valve is fixedly connected to the interior of the filter, an oil pipe pump cylinder is fixedly connected to the outer wall of the filter, a traveling valve is slidably connected to the interior of the oil pipe pump cylinder, and a sand blocking prevention piston is slidably connected to the interior of the oil pipe pump cylinder. According to the sand bailing device, through cooperation of the sand bailing truck, the torque-free steel wire rope, the pulley block, the well mouth sealer and the sand-blocking-preventing sand bailing pump, the problems that according to an existing sand-blocking-preventing sand bailing structure, well washing fluid injected into a well cannot return to the ground, meanwhile, sand grains in a shaft cannot be carried out of a well mouth, and secondary pollution can be caused to an oil layer are solved.

Description

Technical Field

[0001] The utility model relates to the field of oil production engineering, in particular to an oil and water well sand jam prevention and sand bailing structure. Background Art

[0002] During the oil production process, oil and water wells often become clogged and cannot produce oil and inject water normally. The main reason for the blockage of oil wells is that sand particles in the oil layer enter the oil well with the oil flow and gradually settle in the wellbore. The main reason for the blockage of water wells is the pressure fluctuation during water injection, which causes the sand particles in the oil layer to be spit out and deposited in the wellbore.

[0003] The existing sand prevention structure can solve the problem of high-pressure wells by using conventional positive sand flushing methods. However, for low-pressure wells, the positive sand flushing method is less effective or even impossible to implement. The well-washing fluid injected into the well cannot be returned to the ground, and the sand in the wellbore cannot be carried out of the wellhead. In addition, it will cause secondary pollution to the oil layer, and it takes a long time to drain the well-washing fluid injected into the oil layer. In this case, the sand bailing process must be used to solve the problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art and proposes a sand-preventing and sand-bailing structure for oil and water wells, aiming to improve the problem that the well washing fluid injected into the well cannot be returned to the ground, the sand in the wellbore cannot be carried out of the wellhead, and the secondary pollution to the oil layer is caused by the existing sand-preventing and sand-bailing structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an oil and water well sand jam prevention and sand bailing structure, comprising an anti-sand jamming and sand bailing pump, the anti-sand jamming and sand bailing pump is internally fixedly connected with a valve pen tip component, the outer wall of the valve pen tip component is provided with a sand settling oil pipe, the sand settling oil pipe is internally fixedly connected with a filter, the filter is internally fixedly connected with a fixed valve, the outer wall of the filter is fixedly connected with an oil pipe pump barrel, the oil pipe pump barrel is internally slidably connected with a movable valve, the oil pipe pump barrel is internally slidably connected with an anti-sand jamming piston, the oil pipe pump barrel is internally slidably connected with a piston rod, the outer wall of the piston rod is fixedly connected with a counterweight, the outer wall of the counterweight is fixedly connected with a rope locker, the rope locker is internally slidably connected with a torque-free wire rope, the outer wall of the torque-free wire rope is provided with a wellhead sealer, the outer wall of the torque-free wire rope is provided with a pulley block, and the outer wall of the torque-free wire rope is provided with a sand bailing vehicle.

[0006] Furthermore, a piston body is arranged inside the anti-sand-stuck piston, and a leather cup is slidably connected to the outer wall of the piston body.

[0007] Furthermore, the outer wall of the piston body is slidably connected with a leather cup and a cap, and the leather cup and the leather cup and the cap are in close contact with each other.

[0008] Furthermore, the interior of the leather cup and the cap is slidably connected to the outer wall of the movable valve, and the piston body is fitted with the movable valve.

[0009] Furthermore, the pulley block is composed of two pulleys of equal size, and the outer walls of the torque-free steel wire rope slide inside the two pulleys.

[0010] Furthermore, the outer wall of the torque-free wire rope is slidably connected to the inside of the wellhead sealer.

[0011] Furthermore, the outer wall of the torque-free steel wire rope penetrates into the interior of the anti-sand-stuck sand bailing pump.

[0012] Furthermore, one end of the torque-free steel wire rope is fixedly connected to a drum inside the sand bailing vehicle.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, firstly, through the cooperation between the sand bailing vehicle, the torque-free wire rope, the pulley block, the wellhead sealer and the anti-sand-stuck sand bailing pump, the sand in the wellbore can be cleaned out without causing secondary pollution to the oil layer, so that the oil well can resume normal production. The problem that the existing anti-sand-stuck sand bailing structure cannot return the well washing fluid injected into the well to the ground, and cannot carry the sand in the wellbore out of the wellhead, and also causes secondary pollution to the oil layer, is solved, and the construction efficiency and construction speed are improved.

[0015] 2. In the utility model, the pump barrel of the sand bailing pump is a 9.8m oil pipe, and the wearing parts are leather cups. Therefore, the wearing parts of the pump are low in cost, long in stroke, and easy to maintain, thereby reducing the material cost of the sand bailing operation, greatly improving the efficiency of the sand bailing operation, and solving the problem that most of the pump bodies used in the existing sand bailing structures are expensive and have a long stroke. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of a sand-blocking and sand-bailing structure for oil and water wells proposed by the utility model;

[0017] Figure 2 A schematic diagram of the internal structure of a sand-blocking and sand-bailing pump of an oil and water well sand-blocking and sand-bailing structure proposed by the utility model;

[0018] Figure 3 The utility model is a schematic diagram of the internal structure of a sand-preventing piston of an oil and water well sand-preventing and sand-bailing structure.

[0019] Legend:

[0020] 1. Sand bailing vehicle; 2. Torque-free wire rope; 3. Pulley block; 4. Wellhead sealer; 5. Anti-sand jamming sand bailing pump; 5.1. Rope locker; 5.2. Counterweight; 5.3. Piston rod; 5.4. Anti-sand jamming piston; 5.5. Oil pipe pump barrel; 5.6. Floating valve; 5.7. Fixed valve; 5.8. Filter; 5.9. Sand settling oil pipe; 5.10. Valve pen tip assembly; 5.4.1. Piston body; 5.4.2. Leather cup; 5.4.3. Leather cup spare cap assembly. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Reference Figure 1-Figure 3 The utility model provides an embodiment: an oil and water well sand jam prevention and sand bailing structure, comprising a sand jam prevention and sand bailing pump 5, the interior of the sand jam prevention and sand bailing pump 5 is fixedly connected with a valve tip assembly 5.10, the outer wall of the valve tip assembly 5.10 is provided with a sand settling oil pipe 5.9, the interior of the sand settling oil pipe 5.9 is fixedly connected with a filter 5.8, the interior of the filter 5.8 is fixedly connected with a fixed valve 5.7, the outer wall of the filter 5.8 is fixedly connected with an oil pipe pump barrel 5.5, the interior of the oil pipe pump barrel 5.5 is slidably connected with a floating valve 5.8, and the inner wall of the floating valve 5.8 is fixedly connected with a floating valve 5.7. A movable valve 5.6, a sand-preventing piston 5.4 is slidably connected inside the tubing pump barrel 5.5, a piston rod 5.3 is slidably connected inside the tubing pump barrel 5.5, a counterweight 5.2 is fixedly connected to the outer wall of the piston rod 5.3, a rope locker 5.1 is fixedly connected to the outer wall of the counterweight 5.2, a torque-free steel wire rope 2 is slidably connected inside the rope locker 5.1, a wellhead sealer 4 is arranged on the outer wall of the torque-free steel wire rope 2, a pulley block 3 is arranged on the outer wall of the torque-free steel wire rope 2, and a sand bailer 1 is arranged on the outer wall of the torque-free steel wire rope 2;

[0023] Specifically, when the sand in the wellbore needs to be cleared, the drum brake is released to slowly lower the wire rope 2, and at the same time, the anti-sand-stuck sand bailing pump is driven downward. When the load is suddenly reduced and touches the sand surface in the well, it indicates that the sand bailing pump has reached the target position. Next, the construction personnel will repeatedly lift and lower the anti-sand-stuck sand bailing pump to put it into the working state of sucking sand. As time goes by, the sand at the bottom of the well will gradually be sucked into the sand settling oil pipe 5.9, and the sand bailing footage will continue to increase. When the sand settling oil pipe 5.9 is full of sand, the sand bailing footage will stop increasing. At this time, the construction personnel The lifting and lowering actions will be stopped, and the wire rope 2 will be directly lifted to lift the sand pump 5 out of the wellhead. Once the sand pump is lifted out of the wellhead, the construction personnel will release the sand in the sand settling oil pipe 5.9. Then, they will lower the sand pump 5 again according to the above steps and continue the sand bailing operation until the sand at the bottom of the well is completely removed. Through this series of operations, the construction personnel can completely remove the sand in the wellbore without causing secondary pollution to the oil layer, so that the oil well can return to normal production. This not only improves the construction efficiency and speed, but also ensures the quality and stability of oil well production.

[0024] Reference Figure 1-Figure 3 , the interior of the anti-sand-stuck piston 5.4 is provided with a piston body 5.4.1, and the outer wall of the piston body 5.4.1 is slidably connected with a leather cup 5.4.2; the outer wall of the piston body 5.4.1 is slidably connected with a leather cup and cap assembly 5.4.3, and the leather cup 5.4.2 fits with the leather cup and cap assembly 5.4.3; the interior of the leather cup and cap assembly 5.4.3 is slidably connected to the outer wall of the traveling valve 5.6, and the piston body 5.4.1 fits with the traveling valve 5.6; the pulley block 3 is composed of two pulleys of equal size, and the outer walls of the torque-free wire rope 2 slide inside the two pulleys; the outer wall of the torque-free wire rope 2 is slidably connected to the inside of the wellhead sealer 4; the outer wall of the torque-free wire rope 2 penetrates into the interior of the anti-sand-stuck sand bailing pump 5; one end of the torque-free wire rope 2 is fixedly connected to the drum inside the sand bailing vehicle 1;

[0025] Specifically, the reason why the anti-sand-stuck sand bailing pump 5 can effectively prevent the problem of sand sticking is that in the past, the seal was usually sealed by a fixed gap between a steel piston and a steel pump barrel, but this structure had the defect of being non-adjustable. Now, after improvement, the sealing structure adopts a freely adjustable leather cup 5.4.2 and a self-tightening sealing structure of the inner wall of the oil pipe pump barrel 5.5. When sand particles are sandwiched between the piston and the pump barrel, the leather cup 5.4.2 has a certain elasticity and can autonomously avoid the sand particles and continue to slide up and down, which avoids the problem of the metal piston often getting stuck in the pump, thereby greatly reducing the material cost of the sand bailing operation and greatly improving the efficiency of the sand bailing operation. Therefore, the anti-sand-stuck sand bailing pump 5 can operate more reliably through this sealing structure, effectively preventing the problem of sand particles getting stuck in the pump, improving the efficiency and success rate of the sand bailing operation, thereby reducing maintenance costs and material costs.

[0026] Working principle: first, lower the anti-sand-stuck sand bailing pump 5 into the well in turn, fix the wellhead sealer 4 to the wellhead firmly with bolts, fix the ground wheel of the pulley block 3 to the wellhead flange, and lift the top wheel of the pulley block 3 with the large hook of the operating team's traveling carriage and suspend it at a height of about 5m from the wellhead. The sand bailing vehicle 1 is parked on a solid well site ground 20m away from the wellhead, with the center axis of the vehicle perpendicular to the wellhead, the four wheels fixed with iron covers, and the hydraulic legs all extended out to firmly support the ground. The depth load instrument in the vehicle normally displays the working data of the wire rope. When it is necessary to clear the sand in the wellbore, release the drum brake and slowly lower the wire rope 2 to drive the anti-sand-stuck sand bailing pump downward until the load is suddenly reduced and touches the sand surface in the well. Then repeatedly lift and lower the anti-sand-stuck sand bailing pump 5 to make it enter the working state of sucking sand. As the sand at the bottom of the well is gradually sucked into the sand settling oil pipe 5.9, the sand bailing footage is also increasing. When there is no footage, it means that the sand settling oil pipe 5.9 is When the well is full of sediment, the lifting and lowering actions should be stopped, the wire rope 2 should be directly lifted, the sand pump 5 should be lifted out of the wellhead, the sand in the sedimentation oil pipe 5.9 should be released, and then the sand pump 5 should be lowered again according to the above steps to continue to scoop sand until the sand at the bottom of the well is cleaned up, thereby achieving the effect of clearing the sand in the wellbore without causing secondary pollution to the oil layer, allowing the oil well to resume normal production, thereby improving the construction efficiency and speed. Secondly, the sand scoop pump 5 can prevent sand from getting stuck because the seal of the piston is upgraded from the original non-adjustable gap seal between the steel piston and the steel pump barrel to a freely adjustable leather cup 5.4.2 and the inner wall of the oil pipe pump barrel 5.5. Self-tightening sealing structure. When sand is sandwiched between the piston and the pump barrel, the elasticity of the leather cup 5.4.2 itself will avoid the sand from continuing to slide up and down, avoiding the problem of metal piston often getting stuck in the pump, thereby reducing the material cost of sand scooping operation and greatly improving the efficiency of sand scooping operation.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand bailing structure for preventing sand from getting stuck in oil and water wells, comprising a sand bailing pump (5), characterized in that: The anti-sand-stuck sand pump (5) is fixedly connected to a valve tip assembly (5.10) inside, the outer wall of the valve tip assembly (5.10) is provided with a sand settling oil pipe (5.9), the inside of the sand settling oil pipe (5.9) is fixedly connected to a filter (5.8), the inside of the filter (5.8) is fixedly connected to a fixed valve (5.7), the outer wall of the filter (5.8) is fixedly connected to an oil pipe pump barrel (5.5), the inside of the oil pipe pump barrel (5.5) is slidably connected to a floating valve (5.6), the inside of the oil pipe pump barrel (5.5) is slidably connected to a floating valve (5.6), and the inside of the oil pipe pump barrel (5.5) is slidably connected to a floating valve (5.7). The invention discloses a sand-preventing piston (5.4), the inner part of the oil pipe pump barrel (5.5) is slidably connected with a piston rod (5.3), the outer wall of the piston rod (5.3) is fixedly connected with a counterweight (5.2), the outer wall of the counterweight (5.2) is fixedly connected with a rope lock (5.1), the inner part of the rope lock (5.1) is slidably connected with a torque-free steel wire rope (2), the outer wall of the torque-free steel wire rope (2) is provided with a wellhead sealer (4), the outer wall of the torque-free steel wire rope (2) is provided with a pulley block (3), and the outer wall of the torque-free steel wire rope (2) is provided with a sand bailing vehicle (1).

2. The structure for preventing sand jamming and bailing in oil and water wells according to claim 1, characterized in that: A piston body (5.4.1) is arranged inside the anti-sand-stuck piston (5.4), and a leather cup (5.4.2) is slidably connected to the outer wall of the piston body (5.4.1).

3. The structure for preventing sand jam and bailing in oil and water wells according to claim 2, characterized in that: The outer wall of the piston body (5.4.1) is slidably connected with a leather cup and a cap assembly (5.4.3), and the leather cup (5.4.2) fits the leather cup and a cap assembly (5.4.3).

4. The structure for preventing sand jamming and bailing in oil and water wells according to claim 3, characterized in that: The interior of the leather cup and cap assembly (5.4.3) is slidably connected to the outer wall of the movable valve (5.6), and the piston body (5.4.1) is fitted with the movable valve (5.6).

5. The structure for preventing sand jamming and bailing in oil and water wells according to claim 1, characterized in that: The pulley block (3) is composed of two pulleys of equal size, and the outer walls of the torque-free steel wire rope (2) slide inside the two pulleys.

6. The structure for preventing sand jamming and bailing in oil and water wells according to claim 1, characterized in that: The outer wall of the torque-free steel wire rope (2) is slidably connected to the inside of the wellhead sealer (4).

7. The structure for preventing sand jamming and bailing in oil and water wells according to claim 1, characterized in that: The outer wall of the torque-free steel wire rope (2) penetrates into the interior of the anti-sand-stuck sand bailing pump (5).

8. The structure for preventing sand jamming and bailing in oil and water wells according to claim 7, characterized in that: One end of the torque-free steel wire rope (2) is fixedly connected to a drum inside the sand bailing vehicle (1).

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