Blowout preventer shearing blade based on cumulative blasting cutting

Abstract

The invention, which belongs to the key equipment of drilling control in the field of marine engineering, provides a blowout preventer shearing blade based on cumulative blasting cutting. The blowoutpreventer shearing blade applied to a well control device for offshore oil drilling and repairing mainly comprises a blade housing, an energy collection cover, an explosive, a waterproof protective layer, a fastener and an energy collection device housing. The blade is installed in a blowout preventer. When a drilling rod needs to be cut in case of emergency, the blowout preventer makes hydraulicmotion to push the blade to hold a drilling tool tightly; the energy collection cover is compressed on the surface of the drilling tool and the explosive is ignited; the energy collection cover is pressed by the instantaneous high pressure generated by explosive explosion to generate a metal jet and thus the drilling tool is cut off; and then the blowout preventer is turned off and sealed and thewell is sealed.

Description

technical field [0001] The invention relates to a shear ram of a blowout preventer in the field of marine engineering, in particular to a shear ram based on energy-concentrated blasting cutting. Background technique [0002] Ram blowout preventer (BOP) is the most important well control equipment in the process of oil drilling and well completion. The main features of the ram blowout preventer: First, the ram has strong sealing ability and high Keep the closed state and close the wellhead at all times; second, the blowout preventer can be equipped with rams to close various specifications and types of drill pipes, casings, and oil pipes, and can also be equipped with fully-sealed rams to close empty wells, and equipped with shear drills in emergency situations. Shear ram for rod. [0003] The shear ram blowout preventer is a type of ram blowout preventer. It is mainly used in emergency situations during drilling and workover operations. It is necessary to close the shear ra...

AI Technical Summary

Problems solved by technology

[0004] The existing ram BOP has insufficient shear force, and can only cut ordinary drill pipes under limited conditions. For special drilling tools, such as drill pipe joints, drill collars, and weighted drill pipes, more and more high-strength drill pipes will be used in the future. Drill pipes, etc. cannot be guaranteed to be sheared. In addition, the shearing of drill tools that have been deformed or offset cannot be guaranteed. The industry has an urgent demand for high-performance, reliable, and high-shear ram BOPs.

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