Fully functional anti-spouting oil drain device

Abstract

The invention relates to a fully functional anti-spouting oil drain device which is characterized in that a one-way oil drain valve is adopted and is arranged in a hole on the wall of a body; a plurality of body flow channel holes are arranged on the body in the radial direction; an axial long hole and a plurality of sliding sleeve flow channel holes corresponding to the body flow channel holes are arranged on a sliding sleeve; the sliding sleeve is arranged in the inner cavity of the body and is in clearance fit with the inner cavity; a compression spring is arranged between a guiding body and the sliding sleeve, and the upper end and the lower end of the compression spring are respectively connected with the guiding body and the sliding sleeve; and a hole plate is positioned in the inner cavity of the sliding sleeve. The oil drain device of the invention realizes the purpose of effectively preventing the well fluid from being spouted when a pump and a tubular column are conveyed into an oil well, the well is repaired, the pump is inspected and the tubular column is lifted. The invention has the advantages of safety, reliability, simple and convenient operation and the like, saves the energy sources, reduces the pollution, improves the working efficiency and lowers the well repair cost.

Description

technical field [0001] The invention relates to a downhole mechanical device for oilfield exploitation, in particular to an oil drainage device that can prevent blowout without killing the well. Background technique [0002] During workover operations in the oil field, it is necessary to lift the oil well string pump to the ground. At the same time, a large amount of crude oil will inevitably be spilled on the ground, resulting in great waste and serious environmental pollution. For this reason, a drainer is usually connected to the lower part of the oil well pump, which can drain the crude oil and water in the inner cavity of the oil pipe in the well during the operation of lifting the oil pipe. However, due to the high bottom-hole pressure problem in many oil wells, the high-pressure well fluid will pass through fixed valves, oil drainers, oil well pumps, oil pipes, and finally be sprayed to the ground, causing environmental pollution and energy waste, and affecting the no...

AI Technical Summary

Problems solved by technology

However, due to the high bottom-hole pressure problem in many oil wells, the high-pressure well fluid will pass through fixed valves, oil drainers, oil well pumps, oil pipes, and finally be sprayed to the ground, causing environmental pollution and energy waste, and affecting the normal workover operations , and even safety accidents

For this reason, before workover operations, well killing hydraulic wells are often used to prevent blowouts, but the downhole killing fluid after well killing will cause pollution and damage to the oil layer, affect the oil production of the oil well, and increase production costs

The oil drainers currently used in oil fields cannot meet the requirements of oil drainage and snubbing blowout prevention at the same time

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