Pumping well polish rod break-off automatic blowout preventer

Abstract

The invention discloses a pumping well polish rod break-off automatic blowout preventer. The pumping well polish rod break-off automatic blowout preventer comprises a well plugging main body, whereina stepped through hole is formed in the well plugging main body along the axial direction; a ball sealer seat, a magnetic ring, a compression ring and a pressing cap are arranged in sequence on the upper part in the through hole; one side of the middle part of the well plugging main body is provided with a well plugging hole which is communicated with the through hole along the radial direction; asealing steel ball and an elastic assembly are arranged in sequence in the well plugging hole; the sealing steel ball is in clearance fit with the well plugging hole and the through hole in the middle part of the well plugging main body, and is pressed against the outer edge of a pumping well polish rod in the well plugging hole under the action of the elastic assembly; after the pumping well polish rod is broken off, the sealing steel ball can enter the through hole under the action of the elastic force of the elastic assembly and penetrate through the ball sealer seat under the action of the suction force of the magnetic ring to realize well plugging. By adopting the blowout preventer, automatic well plugging can be realized rapidly after the polish rod is broken off, blowout and environmental pollution can be prevented, well plugging under different shaft pressures of the pumping well can be realized, and safe and environment-friendly production of the pumping well can be realized.

Description

technical field [0001] The invention relates to well sealing equipment, in particular to an automatic sealing device for oil pumping well polished rod breakage, which is used for automatic well sealing at the head of the pumping well after the polished rod breaks off. Background technique [0002] In the production process of the pumping wells of major domestic oil and gas field companies, most of them are not equipped with automatic well sealing devices. Once the polished rod breaks off in the pumping well, the wellhead will lose control, and the oil and gas in the wellbore will be ejected out of the wellhead uncontrollably, which will inevitably cause environmental pollution. The waste of oil and gas resources and adverse social impact may even cause fire and explosion. Especially in high-risk wells such as farmland, water sources, residential areas, and densely populated areas, blowout accidents with polished rods will cause more serious consequences and impacts. Conten...

AI Technical Summary

Problems solved by technology

[0002] In the production process of the pumping wells of major domestic oil and gas field companies, most of them are not equipped with automatic well sealing devices. Once the polished rod breaks off in the pumping well, the wellhead will lose control, and the oil and gas in the wellbore will be ejected out of the wellhead uncontrollably, which will inevitably cause environmental pollution. Waste of oil and gas resources and adverse social impact may even cause fire and explosion

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