Downhole device for pumping well

Abstract

The invention provides a downhole device of an oil pumping well. The device of the oil pumping well has the functions that a pipe column is anchored, hot washing water is resisted to be poured into an oil layer, and the anti-spraying and oil drainage effects are achieved. The downhole device comprises a transition connector (1), a center pipe (9), an upper connector (3), a rubber cylinder (4), an upper cone (5), an anchoring tube (7), a lower cone (10), a screw shell (15), an upper valve main body (2), an upper valve ball (17), a valve ball spring (18), a lower valve ball (19), a block tooth (6), a block tooth spring (8), a large friction block (12), a large friction block spring (13), a small friction block (14) and a small friction block spring (20). According to the downhole device of the oil pumping well, the problem of well site pollution caused by well liquid spraying and gushing towards the ground during pump checking of the high-pressure oil well is solved, the functions that the pipe column is anchored, the hot washing water is prevented from being poured into the oil layer, oil liquid in the pipe column is discharged in the pump checking process, and the oil liquid is controlled to spray and gush are integrated, delivering into the well at a time is achieved, and the well does not need to be lifted during pump checking; and in the whole process of downhole serving in the production period, working links are effectively reduced, the working man-hour is shortened, oil pumping production cost is reduced, and oil pumping production efficiency is improved.

Description

technical field [0001] The invention relates to an oil pumping well downhole device, in particular to an oil pumping well downhole device which has the functions of anchoring a pipe string, preventing hot washing water for wax removal from pouring into an oil layer, and preventing blowout and draining oil. Background technique [0002] At present, most of the operations such as anchoring the oil extraction string, running the packer to prevent the hot water from entering the oil layer, installing the drainer and the blowout preventer in the oil production of the oilfield are all independently completed by a single process and multiple processes, sometimes even requiring The pipe string has to be tripped many times, the construction process is many, the operation cycle is long, and the cost of downhole tools is high. Invention patent CN201410702656.8 discloses "a tubing anchor with triple functions". Completed during the process, it improves work efficiency, saves production...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a downhole device for an oil pumping well with the functions of pipe string anchoring, preventing hot washing water from pouring into the oil layer, and blowout prevention and oil drainage, so as to solve the problem of high-pressure oil well fluid overflow during the process of oil well inspection and pumping up and down pipe strings. For the problem of well site pollution caused by the ground, the functions of anchoring the pumping well string, wax cleaning and hot washing water seal, checking the oil in the pumping string during the process of pumping the string, and controlling the oil overflow of the high-pressure oil well inspection pump are integrated. In one piece, and the downhole device can stay downhole once with the oil well pump downhole, no need to replace it when the pump is checked again, and the function of the newly installed oil well string is still the same after insertion

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