TRAPPING DEVICE Russian patent published in 2019 - IPC E21B31/18 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to gas and oil industry, namely, to devices that carry out pressure testing and extraction of a valve after crimping of tubing string. Device comprises a body and a cover connected to each other, a collet with blades and a catcher. Collet is located inside the cover, in its lower part, and the catcher is inside the cover, in its upper part. Collet and catcher are installed coaxially, in direction to each other so that at passage of pressure valve into inner cavity of collet said valve presses collet tabs to walls of cover, passes upwards and gets into inner cavity of fishing tool. Passage of the catcher in the upper part has diameter smaller than in the lower part.

EFFECT: increased reliability of gripping and retaining of pressure valve and prevention of accidental disconnection of device parts during operation.

4 cl, 3 dwg