VALVE FOR DRAINING FLUID FROM THE TUBING (EMBODIMENTS) Russian patent published in 2023 - IPC E21B34/14 

FIELD: oil industry.

SUBSTANCE: invention relates to valve devices for communicating the cavity of the tubing with the annular space in wells operated by rod pumps (RP). The valve for draining liquid from tubing in wells operated by RP comprises a body, a movable sleeve blocking the hole in the tubing, with displacement limiters, a system for fixing the sleeve and a pusher mounted on the rod string. The displacement limiter is made in the form of a groove on the outer surface of the sleeve, which interacts with a tightly installed radial pin in the valve body and is made in length corresponding to the amplitude of the sleeve movement along its longitudinal axis. The fixation system is made in the form of an elastic split ring installed in the radial groove of the sleeve and interacting alternately with two reciprocal radial grooves made on the inner surface of the housing. Elastic seals are rigidly fixed on the movable sleeve. The hole in the tubing is made in a radial groove with chamfers. The pusher is mounted on a rod between two tool joints and is made in the form of a sleeve with elastic protrusions sized to ensure its fixation inside the tubing string. According to the second embodiment of the valve, a through radial slot is made on the sleeve, which interacts with a cantilever rod, installed radially in the body in a tight manner and protruding into the sleeve passage, configured for elastic bending or rotation. The pusher is made rigid with an outer diameter that ensures its tight passage through the sleeve passage.

EFFECT: simplification of the design of the valve, its assembly and increased reliability.

3 cl, 8 dwg