HYDRAULICALLY DRIVEN DEVICE FOR SHEARING PIPES AT WELLHEAD OF FLOWING WELL Russian patent published in 2020 - IPC E21B29/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas production and exploration industries and is intended for cutting of drilling and tubing pipes during elimination of emergent emergency situations, as well as open flowing at oil and gas wells in drilling or repair. Device includes housing equipped with replaceable stop, hydraulic cylinder. Housing is made with an open mouth, is equipped with suspension assembly, arranged on the boom arm end of the manipulator crane, consisting of a frame, enclosing the boom head and fixed thereon through finger, slider, arranged sideways on the outer side of the frame in a dovetail slot with support in the groove bottom and equipped with a horizontal axis, a bracket movably arranged in the bushing, fixed in the center of gravity of the housing, equipped with a replaceable stopper with an open mouth, hydraulic cylinder and movable knife and providing horizontal position of device housing with possibility of remote self-installation on pipe for its cutting in any accessible place by means of boom of manipulator crane, excluding presence of workers in area of flowing jet. Bracket sleeve is equipped with friction unit with possibility of braking of bracket rotation, which is attached to housing, on suspension unit horizontal axis.

EFFECT: possibility of cutting off and dropping drilling and tubing pipes to the bottomhole of the well for closing blind blades of preventer, when other methods of liquidation of open flowing due to leakage of pipe slips of blowout equipment or bending deformation of the pipe itself, can not be made.

1 cl, 3 dwg