TESTING VALVE Russian patent published in 2020 - IPC E21B34/06 E21B34/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used for pressure testing of tubing string (tubing) prior to performance of technological operations in well, with the possibility of subsequent recovery of circulation for injection of various process liquids, plugging and cement solutions, as well as flushing the well. Pressure testing valve contains a casing, inside of which there is a shaft with radial circulation holes and a plug in the lower part, a whipping element covering the side opening of the barrel. In annular space between casing and barrel by means of shear pins there is a piston sealing the radial circulation openings of barrel. Above the piston there is an annular chamber communicating with the hole of the aerated element, which is installed in the lateral hole of the barrel.

EFFECT: simple design and higher reliability of the pressure testing valve due to the absence of elements, contamination of which with mechanical impurities contained in the well fluid during the lowering of the valve into the well can lead to failure of the valve, as well as by excluding spontaneous actuation of the valve and opening of circulation openings, enabling control of opening pressure of circulation openings to restore circulation of liquid along the tubing string.

1 cl, 1 dwg