DEVICE FOR PRESSURE TESTING OF TUBING STRING Russian patent published in 2022 - IPC E21B34/10 F16K15/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of the oil and gas industry, in particular to the field of pressure testing of pipes lowered into the well.The device for pressure testing of a tubing string contains a body, a central sleeve with a seat, a shut-off element in the form of a cracker with an axis of rotation. The sleeve is rigidly connected to the body and the bracket. A clapperboard with a lever is installed in the slot of the bracket on the axis of rotation, interacting with the pusher, actuated by the load associated with it or by a spring to return the cracker to its original position. The clapperboard is made with a concave inner surface, on which a gripper is installed, interacting with the clapperboard cover dropped from the surface. A catcher in the form of elastic wire loops is attached to the upper part of the body of the gripper, completely covering the inner perimeter of the tubing and interacting with the gripper.

EFFECT: improving reliability and ensuring the possibility of multiple use of the device.

4 cl, 4 dwg