1. The utility model provides an oil pumping swab automatic sealing device, installs in the oil pumping well and prevents spouting valve rear end, its characterized in that: the sealing device comprises a hollow cavity, an upper stopper and a lower stopper are arranged at two ends of the cavity, only an upper sealing plug is arranged on the upper stopper, a lower sealing plug is arranged on the lower stopper, and a through hole is formed in the side wall between the upper sealing plug and the lower sealing plug.

2. The automatic sealing device for an oil sucker according to claim 1, wherein: the upper sealing plug and the lower sealing plug are rubber sealing elements with conical structures.

3. The automatic sealing device for an oil sucker according to claim 2, wherein: the upper and lower sealing plugs are made of HA70 abrasion resistant nitrile rubber.

4. The automatic sealing device for an oil sucker according to claim 1, wherein the inner wall of the chamber is attached with a soft sealing rubber.

5. The automatic sealing device for an oil sucker according to claim 1, wherein the upper stopper (2) is a tapered metal block with a gradually narrowing structure from bottom to top, and the lower stopper (6) is a cylindrical metal block with an opening at the center.

6. The automatic sealing device for an oil sucker according to claim 1, wherein: the through hole is connected with the cylinder.

Background

In the process of oil exploitation, the pressure borne by an oil outlet is usually very large, and particularly under the condition of encountering an oil field with a high oil-gas ratio, even if a blowout prevention valve is arranged on the traditional oil pumping equipment, oil can still be brought out along with a steel wire rope, so that leakage and even splashing are caused. With the increasingly stringent requirements for environmental protection, the conventional blowout prevention equipment cannot meet the existing production requirements. Therefore, the problem of splashing caused by excessive oil brought out due to insufficient sealing of equipment in the process of pulling up the steel wire rope is urgently needed to be solved.

Disclosure of Invention

The invention aims to provide a novel oil pumping well, which can solve the problem of splashing caused by excessive oil brought out in the process of pulling up a steel wire rope in the oil pumping process of an oil pumping well so as to overcome the defects in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic sealing device of oil pumping swab, installs in the blowout prevention valve rear end of oil pumping well, sealing device is including hollow cavity, the cavity both ends are provided with stopper and stopper down, it only has last sealing plug to set up on the stopper, be provided with lower sealing plug on the stopper down, the through-hole has been seted up on the lateral wall between last sealing plug and the lower sealing plug.

Preferably, the upper sealing plug and the lower sealing plug are rubber sealing elements with conical structures.

Preferably, the upper and lower sealing plugs are made of hard HA70 abrasion resistant nitrile rubber.

Preferably, the inner wall of the cavity is attached with soft sealing rubber.

Preferably, the upper stopper (2) is a conical metal block which is of a gradually narrowing structure from bottom to top, and the lower stopper (6) is a cylindrical metal block with an opening at the center.

Preferably, the through hole is connected with the cylinder.

The invention has the beneficial effects that: the device is arranged at the rear end of an oil pumping swab of an oil pumping well, and the lower sealing plug and the upper sealing plug are pushed by a cylinder to block fluid in the oil well below and remove oil brought out from a steel wire rope; the upper sealing plug is used for double protection, so that residual oil on the steel wire rope is further removed, and the oil pumping sucker is effectively sealed.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an embodiment of the present invention. The diagram is in turn: the device comprises an equipment shell (1), an upper stopper (2), an upper sealing plug (3), a steel wire rope (4), a lower sealing plug (5), a lower stopper (6) and an air hole (7).

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1, an automatic sealing device for an oil sucker is characterized in that: the automatic sealing device of the oil pumping sucker is arranged at the rear end of a pipeline of an oil pumping well, a steel wire rope (4) penetrates through equipment, an air hole (7) communicated with an external air cylinder is formed in the middle section of the pipeline of the equipment, the upper end and the lower end of the device are sealed by virtue of movable rubber sealing parts, and the upper pipe orifice and the lower pipe orifice of the device are respectively provided with a limiting device.

Specifically, the upper sealing plug (3) and the lower sealing plug (5) are both cone-shaped structures, the sealing force can be changed linearly along with the movement of the sealing plugs, the lower sealing plug blocks fluid in a well and removes oil brought out by the steel wire rope, and the upper sealing plug further processes residual liquid brought out by the steel wire rope.

Specifically, the inner wall of the inner cavity of the device is attached with soft sealing rubber, so that the sealing performance of the inner cavity is improved.

Specifically, the air hole (7) is communicated with an external air cylinder, an air cylinder piston pushes the upper sealing plug and the lower sealing plug in the device to move, the constant pressure of 0.5kg in the inner cavity is kept, the sealing plug and the steel wire rope are ensured to be always in a completely tight contact state, and oil is effectively prevented from flying out of a gap of the steel wire rope.

Specifically, the upper and lower pipe orifices of the device are respectively provided with a limiting device, the upper limiting device (2) is a metal device which is in a gradually narrowing structure from bottom to top, and the lower limiting device (6) is a cylindrical metal block with an opening at the central position. Go up stopper's narrowing down structure and conical upper seal plug (3) laminating, it is more smooth and easy to slide, and stopper adopts cylindrical design down, can effectively restrict the removal of lower sealing plug (5).

Preferably, the upper sealing plug (3) and the lower sealing plug (5) are made of HA70 abrasion-resistant nitrile rubber, so that the service life of the rubber in a high-pressure environment is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.