CN111561444B - Oil pump plunger and oil pump - Google Patents

Abstract

The invention relates to an oil pump plunger and an oil pump, belonging to the technical field of oil extraction in an oil field. Under the action of the damping vibration-absorbing pad, the oil pump can achieve ideal vibration-absorbing effect, reduce the abrasion of the valve ball and the valve seat of the oil pump, protect the oil pipe, prolong the service life of the oil pump and prevent accidents.

Description

Oil well pump plunger and oil well pump

Technical Field

The invention belongs to the technical field of oil field production, is applied to an oil well pumping whole-barrel pump, and specifically relates to a pumping pump plunger and a pumping pump.

Background Art

At present, the whole barrel pump is widely used in oilfield pumping wells. The plunger will hit the liquid surface at a very high speed when it moves downward, so that the fluid load is suddenly transferred from the rod column to the oil pipe, and a strong shock wave is generated at the same time, which destroys the entire pumping system. This liquid hammer effect is particularly obvious for oil wells with insufficient fluid supply. For an oil well with 5 strokes, the number of liquid hammers that occur every day is 7,200 times. Continuous liquid hammers can cause premature fatigue failure of the pumping rod column, premature damage to the valve ball and valve seat of the oil pump, accelerated wear of the plunger and pump barrel, and sudden stretching of the oil pipe under the action of liquid hammer, loosening its threads, and causing leakage or disconnection failure.

Summary of the invention

The present invention provides a pump plunger and a pump, aiming to solve the above-mentioned problems, namely, the problem that continuous liquid hammer can cause premature fatigue failure of the pump rod, premature damage to the valve ball and valve seat of the pump, accelerated wear of the plunger and the pump barrel, and sudden stretching of the oil pipe under the action of liquid hammer, loosening its threads, and causing leakage or breakage failure.

To achieve the above purpose, the technical solution adopted by the present invention is as follows:

The utility model relates to a plunger of an oil pump, comprising a plunger, wherein the end of the plunger is provided with a damping vibration reduction pad.

The damping pad is fixedly or detachably connected to the end of the plunger.

The diameter of the damping pad is the same as the diameter of the connection point of the plunger end.

The damping and vibration reduction pad has a cavity in the middle.

The cavity in the middle of the damping and vibration reduction pad is provided with a partition, and the partition divides the cavity in the middle of the damping and vibration reduction pad into a plurality of sub-cavities.

The cavity in the middle of the damping and vibration reduction pad is filled with gas.

Each of the sub-cavities is in the shape of a hexagonal prism, and the cavity is filled with an inert gas.

The plunger is made of steel or alloy material, and the damping pad is made of oil-resistant rubber material.

The end of the damping and vibration reduction pad is provided with a thickened layer, and the thickened layer is integrated with the damping and vibration reduction pad.

A well pump is provided, wherein any one of the above-mentioned well pump plungers is applied to the well pump.

The beneficial effect of the present invention is that, under the action of the damping vibration reduction pad, the oil pump can achieve an ideal shock absorption effect, reduce the wear of the valve ball and valve seat of the oil pump, protect the oil pipe, increase the service life of the oil pump and prevent accidents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional schematic diagram of a damping pad in an oil well pump plunger according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the overall structure of the oil well pump of the present invention.

DETAILED DESCRIPTION

The following will describe in detail the oil well pump plunger solution provided by the embodiment of the present invention through several specific embodiments.

Example 1

Please refer to FIG. 1 , which shows a cross-sectional schematic diagram of a damping and vibration-reducing pad 1 of a well pump plunger in an embodiment of the present invention. The well pump plunger comprises a plunger, and the end of the plunger has a damping and vibration-reducing pad 1 .

In the above embodiments, in particular, for the problem in the prior art that for oil wells with insufficient fluid supply, the plunger of the oil pump will hit the liquid surface at a very high speed when it moves downward, causing the fluid load to be suddenly transferred from the rod column to the oil pipe, while generating a strong shock wave, thereby destroying the entire oil pumping system. A damping and vibration-reducing pad 1 is added to the end of the plunger to cope with the liquid-hitting phenomenon. Due to the addition of the damping and vibration-reducing pad 1, after the plunger hits the liquid surface, the damping and vibration-reducing pad 1 first contacts the liquid surface, and consumes the energy of the liquid-hitting in advance through the principle of damping and vibration reduction, thereby reducing the impact of the liquid-hitting shock wave on the entire oil pump.

Furthermore, the damping and vibration-absorbing pad 1 may be a damping shock absorber with elastic components or an elastic shock-absorbing material, such as rubber or rubber products.

Example 2

Furthermore, in another embodiment of the oil pump plunger of the present invention, the damping and vibration reduction pad 1 is fixedly or detachably connected to the end of the plunger.

In the above embodiments, especially in oil wells with insufficient liquid supply, the part of the plunger that first contacts the liquid surface is the plunger end. Therefore, the damping and vibration-damping pad 1 is arranged at the position of the part extending outward from the plunger end, so that the damping and vibration-damping pad 1 can first contact the liquid surface to cope with the shock wave generated by the liquid-slamming phenomenon. The arrangement of this embodiment can increase the efficiency of the damping and vibration-damping pad 1 in coping with the liquid-slamming phenomenon.

Example 3

Furthermore, in another embodiment of the oil pump plunger of the present invention, the diameter of the damping pad 1 is the same as the diameter of the connection part of the plunger end.

In the above embodiment, the diameter of the damping pad 1 is the same as the diameter of the connection part of the plunger end, which can achieve a stabilizing effect.

Example 4

Furthermore, in another embodiment of the oil pump plunger of the present invention, the damping and vibration reduction pad 1 has a cavity in the middle.

In the above embodiments, the arrangement of the cavity can effectively absorb the shock wave.

Example 5

Furthermore, in another embodiment of the oil pump plunger of the present invention, a partition is provided in the cavity in the middle of the damping and vibration reducing pad 1, and the partition divides the cavity in the middle of the damping and vibration reducing pad 1 into a plurality of sub-cavities.

In the above embodiment, the structure in which the damping and vibration reduction pad 1 is composed of a plurality of sub-cavities can increase the shock absorption efficiency of the damping and vibration reduction pad 1. Compared with a single cavity, this structure has a better shock absorption effect.

Example 6

Furthermore, in another embodiment of the oil pump plunger of the present invention, the cavity in the middle of the damping pad 1 is filled with gas.

In the above embodiment, the cavity in the middle of the damping and vibration reduction pad 1 is filled with gas, which can make the damping and vibration reduction pad 1 more stable in normal state.

Example 7

Furthermore, in another embodiment of the oil well pump plunger of the present invention, the sub-cavities are all in the shape of hexagonal prisms, and the cavities are filled with inert gas.

In the above embodiments, the cavity is filled with inert gas and the hexagonal prisms are distributed in a honeycomb shape, both of which can increase the service life of the hexagonal prisms.

Example 8

Furthermore, in another embodiment of the oil pump plunger of the present invention, the damping and vibration reduction pad 1 has multiple layers.

In the above embodiment, the multi-layer hexagonal prisms can absorb the shock waves generated by the plunger and the liquid surface in the oil pump in layers, thereby absorbing the shock waves more effectively.

Example 9

Furthermore, in another embodiment of the oil pump plunger of the present invention, the plunger is made of steel or alloy material, and the damping vibration reduction pad 1 is made of oil-resistant rubber material.

In the above embodiment, the plunger is made of steel or alloy material to increase the service life, and the damping pad 1 is made of oil-resistant rubber material to absorb shock wave energy.

Example 10

Furthermore, in another embodiment of the oil pump plunger of the present invention, the end of the damping and vibration-reducing pad 1 has a thickened layer, and the thickened layer is integrated with the damping and vibration-reducing pad 1 .

In the above embodiment, the end of the damping and vibration reduction pad 1 has a thickened layer, which can increase the service life of the damping and vibration reduction pad 1.

Embodiment 11

Please refer to FIG. 2 , which shows an oil well pump according to the present invention, wherein the oil well pump plunger of any one of embodiments 1 to 7 is applied to the oil well pump.

In the above embodiment, the oil pump using the oil pump plunger with the damping vibration-reducing pad 1 can greatly increase its service life. In Figure 2, the structure of the oil pump is a schematic diagram of the structure of the prior art, and its schematic structure includes a valve cover 2, an oil pump barrel 3, a floating valve 4, a plunger 5, a damping vibration-reducing pad 6, and a fixed valve 7.

It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, descriptions involving "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

The technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims (5)

1. The utility model provides an oil-well pump plunger, includes plunger, its characterized in that: the end part of the plunger is provided with a damping vibration pad; the middle part of the damping vibration attenuation pad is provided with a cavity; a partition is arranged in the cavity in the middle of the damping vibration attenuation pad, and the partition divides the cavity in the middle of the damping vibration attenuation pad into a plurality of subchambers; the shape of each subchamber is a hexagonal prism, and the chamber in the middle of the damping vibration attenuation pad is filled with gas; the cavity is filled with inert gas; the damping vibration pad has multiple layers; the end part of the damping vibration attenuation pad is provided with a thickening layer, and the thickening layer is integrated with the damping vibration attenuation pad.

2. A pump plunger as set forth in claim 1 wherein said damping pad is fixedly or removably attached to said plunger end.

3. The oil pump plunger of claim 1 wherein said dampening pad has the same diameter as the diameter at the junction of the plunger ends.

4. A pump plunger as claimed in any one of claims 1 to 3 wherein said plunger is of steel or an alloy material and said damping pad is of an oil resistant rubber material.

5. An oil pump, wherein the plunger of the oil pump of any one of claims 1 to 4 is applied to the oil pump.