An oil pipe drain anchor

Abstract

The invention provides an oil pipe drainage anchor which is used in oil fields, and aims at solving the problem that a conventional oil pipe drainage anchor cannot realize halfway pressure testing in an oil pipe descending process. The oil pipe drainage anchor is composed of a conventional oil pipe anchor, and a hollow shear pin which is arranged in a hollow pipe, wherein a hydraulic communication hole is plugged by the hollow shear pin in the process of going down in a well, and an oil pipe pressure-testing oil pipe anchor cannot realize anchoring at this time; when the oil pipe is laid down and an oil rod is drawn downward, a plunger shears the hollow shear pin in the process of passing through the drainage anchor, a hydraulic channel is opened, and the oil pipe anchoring can be realized. Compared with the other oil pipe drainage anchors, the oil pipe drainage anchor has the advantages that not only are the functions of oil drainage and anchoring obtained, but also a halfway pressure testing function in the oil pipe descending process is obtained at the same time, so that the labor strength of workers is relieved, negative influences to production from a plurality of uncertain factors are avoided, and the efficacy is improved.

Description

technical field [0001] The invention relates to a downhole tool for an oil field, in particular to an oil pipe drainage anchor capable of pressure testing halfway. Background technique [0002] The tubing drainage anchor is a commonly used downhole tool in the rod pump oil production process, and it is widely used in the field. On the one hand, it can complete the oil drainage function, reduce pollution, and improve the working environment of workers. On the other hand, it can also realize the anchoring of oil pipes, improve pump efficiency, and save energy. In the actual production of oilfields, in order to avoid the situation that individual tubing buckles are not tightly sealed and cause the entire string to be pulled out again, it is often necessary to perform segmental pressure tests on the tubing that goes down the well, also known as midway pressure tests. However, most of the oil pipe drainage anchors used in the field do not have the function of pressure test in th...

AI Technical Summary

Problems solved by technology

However, most of the oil pipe drainage anchors used in the field do not have the function of pressure test in the middle.

Chinese Patent (Application No.) 200620122343.6 discloses a segmented pressure tubing drainage and anchoring device. Although the tubing drainage and anchoring device can realize segmented pressure, the broken pin is denser than the well due to its density. Due to the density of the liquid, it will sink to the fixed valve of the oil well pump, which will easily cause the accident of the oil well pump valve being stuck

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