RU195327U1 - Well Plunger Pump Cylinder - Google Patents

Abstract

The utility model can be used in pumps installed in wells of a limited diameter. The cylinder of the borehole plunger pump consists of the working part of the RF (1) and extensions U (2) and (3) and sections (4) and (5) with connecting threads located at the ends of the cylinder. The diameter D of the channel Y (2) and (3) is larger than the diameter d of the RF channel (1). RF (1), Y (2) and (3) and sections (4) and (5) with connecting thread are made in one piece in the form of a cylinder with a stepped channel, while Y (2) and (3) are formed by steps with a large the diameter D of the channel than the diameter d of the RF channel (1) located between the RF (1) and sections (4) and (5) with a connecting thread. The productivity of the pump installed in the well of a given diameter increases due to the large diametrical dimensions of the working part while maintaining the ability to clean the plunger. 7 cp f-ly, 1 ill.

Description

The utility model relates to structural elements of pumps specially designed for lifting liquids from great depths, for example, from wells and can be used in pumps installed in wells of a limited diameter.

Cylinders of deep-well sucker-rod pumps are known (patent RU 25052 U1, publ. 2002. Catalog of parts and assembly units of OAO "IZHNEFTEMASH" Deep-sucker-rod pumps 2006, pp. 20-22, 69, 72, 73 (information on the Internet: http://izhneftemash.ntrt.ru/images/showcase/catalog.pdf), which consists of a working part, sections with a connecting thread, to which coupling extensions are screwed, the channel diameter of which is larger than the channel diameter of the working part.

The disadvantages are the low productivity of pumps with such cylinders due to the limited diametrical dimensions of the working part, onto which the coupling extensions of a larger outer diameter are screwed.

The cylinder (patent RU 25052 U1) is adopted as a prototype of the claimed design.

The technical problem solved by the claimed utility model is to increase the productivity of a pump installed in a well of a given diameter due to the large diametrical dimensions of the working part while maintaining the possibility of cleaning the plunger when it leaves the working part in an extension cord.

The problem is solved by improving the cylinder of a borehole plunger pump, consisting of a working part and at least one extension cord, the channel diameter of which is larger than the diameter of the channel of the working part, and sections with connecting threads located at the ends of the cylinder.

This improvement lies in the fact that the working part, the extension cord and the sections with the connecting thread are made in one piece in the form of a cylinder with a stepped channel, while the extension is formed by a step with a larger channel diameter than the diameter of the channel of the working part located between the working part and the section with connecting thread.

Such a structural embodiment of the cylinder makes it possible to carry out the working part with large diametric dimensions and to save the possibility of cleaning the pump plunger when it leaves the working part in an extension cord whose channel diameter is larger than the diameter of the working part channel.

There are various options for the implementation of the elements of the inventive cylinder, which allow the use of a plunger of different lengths, providing the necessary pressure of the plunger pump, and use universal technological equipment, for example, a universal lathe, to manufacture the cylinder.

For instance:

the length of the step of the extension may be less than the length of the step of the working part;

the step length of the extension may be equal to the length of the step of the working part;

the length of the extension step can be greater than the length of the working part stage, which makes it possible to use a cylinder with a short working part, the manufacture of which does not require special technological equipment for the precision processing of the internal long channel;

the diameter of the extender channel can be equal to or less than the internal diameter of the section with a connecting thread, which allows the cylinder to be manufactured using a high-performance boring and honing tool, the introduction of which into the cylinder channel is possible only with such a ratio of diameters.

Depending on the operating conditions of the pump, the cylinder of the borehole plunger pump may be equipped with a second extension cord formed by a step located at the second end of the working part, which makes it possible to clean the pump plunger when it leaves the working part, both on one side and on the other side.

In this case, the steps forming the extensions can have the same length.

The steps forming the extensions can be of different lengths, which allows the use of additional devices, such as a removable suction valve or a device for bleeding gas, while maintaining the effective stroke length of the plunger of the rod pump.

The proposed utility model is illustrated in the drawing, which shows a longitudinal section of the inventive cylinder with two extensions.

The cylinder of the borehole plunger pump consists of a working part 1 and extension cords 2 and 3 and sections 4 and 5 with connecting threads located at the ends of the cylinder. The diameter D of the channel of the extensions 2 and 3 is larger than the diameter d of the channel of the working part 1. The working part 1, the extensions 2 and 3 and the sections 4 and 5 with connecting thread are made in one piece in the form of a cylinder with a stepped channel, while the extensions 2 and 3 are formed by steps with a larger diameter D of the channel than the diameter d of the channel of the working part 1, located between the working part 1 and sections 4 and 5 with a connecting thread.

The inventive cylinder is a structural element of a borehole plunger pump, which is installed in the well. Due to the fact that the working part 1, extension cords 2 and 3 and sections 4 and 5 with connecting threads are made in one piece in the form of a cylinder with a stepped channel, it is possible to maximize the diametrical dimensions of the well. When the pump is operating, its plunger (not shown) makes a reciprocating motion. In extreme positions, the plunger leaves the working part 1 of a smaller diameter d in steps 2 and 3, forming extension cords with a large diameter D, ensuring the cleaning of the plunger, which is necessary for reliable operation of the pump.

Thus, the use of the proposed utility model allows to increase the productivity of a pump with such a cylinder due to the execution of the working part with large diametric dimensions and to save the ability to clean the pump plunger when it leaves the working part in an extension cord whose channel diameter is larger than the diameter of the working part channel.

Claims (8)

1. The cylinder of the borehole plunger pump, consisting of a working part and at least one extension cord, the channel diameter of which is larger than the diameter of the channel of the working part, and sections with connecting threads located at the ends of the cylinder, characterized in that the working part, extension cord and sections with connecting the threads are made in one piece in the form of a cylinder with a stepped channel, while the extension cord is formed by a step with a larger channel diameter than the diameter of the channel of the working part located between the working part and the section with connecting thread. 2. The cylinder of the borehole plunger pump according to claim 1, characterized in that the length of the extension stage is less than the length of the stage of the working part. 3. The cylinder of the borehole plunger pump according to claim 1, characterized in that the length of the extension stage is equal to the length of the stage of the working part. 4. The cylinder of the borehole plunger pump according to claim 1, characterized in that the length of the extension stage is greater than the length of the stage of the working part. 5. The cylinder of the borehole plunger pump according to claim 1, characterized in that the diameter of the extension channel is equal to or less than the internal diameter of the section with a connecting thread. 6. The cylinder of the borehole plunger pump according to claim 1, characterized in that it is equipped with a second extension cord formed by a stage located at the second end of the working part. 7. The cylinder of the borehole plunger pump according to claim 6, characterized in that the steps forming the extensions are of the same length. 8. The cylinder of the borehole plunger pump according to claim 6, characterized in that the steps forming the extensions are of different lengths.

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