Process for backwashing permeable downhole filter by high pressure fluid column in oil conduit

Abstract

The invention provides a method and a technology using a high-pressure liquid column in an oil pipe for reversely flushing a sand filtering pipe, and expounds the selection of the type of the oil extracting pump and the basic calculation and the selection of the oil extractor related to the technology. According to the concrete implementing process of the technology using the high-pressure liquid column for reversely flushing a sand filtering pipe and aiming at the thick oil well of high sand concentration, the method and the technology have excellent effects on improving the sand resistance and the oil extracting efficiency of the oil extracting pump, in particular on prolonging the service life of the oil extracting pump. The technology does not need additional working equipment to realize the function and the effect of high oil extracting efficiency and long service life through using the normal production equipment for work by improving the structure of the pump body of the oil extracting pump of a plunger piston type. The realization of the technology and the process enables the oil extracting pump used for the production of a sand-outlet oil well to solve the sand clamping phenomenon caused by the sand entering between the plunger piston and the pump cylinder and the blockage of the sand filtering pipe caused by sand by one-time work, thus, the scuffing and the abrasion of the cylinder of the pump are reduced, the blockage substance in the sand filtering pipe is completely removed, and the production period of the oil well and the service life of the pump are prolonged. The production well realizing the method of the technology and using the technology has high oil extracting efficiency and long production period.

Description

technical field [0001] The invention relates to the field of sand control performance of a plunger type oil well pump for oil production and the cleaning process of a sand filter tube, and is especially aimed at the phenomenon that the efficiency of the oil well pump is sharply reduced due to the influence of sand production in heavy oil wells with high sand content and high viscosity , put forward the specific process and implementation process of cleaning the sand filter tube. Using the pressure of the high-pressure liquid column in the oil pipe to fully backwash the sand filter pipe, the oil well pump can regain the original oil pumping efficiency, thereby improving the sand control performance and service life of the oil well pump, and prolonging the production cycle of the oil well. Background technique [0002] At present, rod pumps are mainly used in the exploitation of ordinary heavy oil, and there are two major disadvantages in pumping heavy oil with ordinary rod pu...

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Problems solved by technology

[0008] The purpose of the present invention is to improve the shortcomings of short service life, low oil pumping efficiency, and easy to affect normal work due to high sand production of oil wells, and to provide a kind of high-pressure liquid column in the oil pipe that is widely applicable to such oil wells. Backwash sand filter tube technology and its implementation

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