Blowout prevention oil-well pump

Abstract

The invention discloses a blowout prevention oil-well pump, and is characterized in that a pump barrel, a connecting pipe and an oil inlet valve are connected in sequence, an oil outlet valve is arranged on the lower part of a plunger, the inner diameter of the connecting pipe is greater than the inner diameter of the pump barrel, an elastic lock claw is arranged on the lower part of the oil outlet valve, an inner lock pipe is suspended on a shoulder of a strip body milled at the lower part of the elastic lock claw, an suspension surface is a conical surface, the strip body milled at the lower part of the elastic lock claw is coated by an outer lock sleeve, the outer lock sleeve is supported by a spring, after a blowout prevention valve ball is placed in the blowout prevention plunger, the blowout prevention plunger is connected to the lower part of the inner lock pipe, a pressure rod is arranged in the elastic lock claw, the blowout prevention valve ball is pressed by the lower part of the pressure rod, the upper part of the inner lock pipe is communicated with the lower part of the blowout prevention plunger, the outer diameter of the outer lock sleeve is great than the inner diameter of the pump barrel, the plunger drives the outer lock sleeve to move upwards to a shoulder surface formed by the pump barrel and the connecting pipe, the outer lock sleeve breaks away from the strip body milled at the lower part of the elastic lock claw, the strip body milled at the lower part of the elastic lock claw is expanded outwards under the action of axial force, so that the elastic lock claw and the inner lock pipe are separated, the pressure rod is lifted away along with the plunger, and the blowout prevention valve ball rises to block a channel of the blowout prevention plunger.

Description

technical field [0001] The invention relates to an oil pumping blowout prevention device for an oil pumping well in an oil field, and is a blowout prevention oil pump. Background technique [0002] Blowouts and major engineering accidents will occur when oil wells are operating under pressure at the wellhead. In order to prevent blowout, only the well killing operation is performed on the oil well at this time. Killing is to inject high-density liquid into the wellbore or formation, so that the bottom hole pressure is higher than the formation pressure, and the high-pressure liquid in the formation cannot flow into the wellbore and spray to the ground. Because well killing makes the bottom hole pressure higher than the formation pressure, the formation will be crushed to death, the oil layer will be polluted, the production of the oil well will be reduced, and significant economic losses will be caused. Contents of the invention [0003] The object of the present inventi...

AI Technical Summary

Problems solved by technology

Since the bottom hole pressure is higher than the formation pressure due to well killing, the formation will be crushed to death, the oil layer will be polluted, the production of the oil well will be reduced, and significant economic losses will be caused.

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