TUBING JOINT Russian patent published in 2018 - IPC E21B17/01 E21B17/42 F16L15/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil producing industry, more particularly to tubing joints, and can be used to install a tubing string for the subsequent launching into it of a small inboard submersible pumping unit of an inverted type using a carrying cable. Said connection includes pipes with external conical threads at the ends, a socket with a groove in the middle and a tapered thread on both sides and a polymer cuff between the ends of the pipes. Inside, on the cylindrical surface of the polymeric cuff there are longitudinal protrusions with approach facets along the ends, equidistant from each other in the circumferential direction. Outer surface of the polymeric cuff is formed by a cylindrical surface, an intermediate locking collar and a conical surface interfaced with the tapered thread of the socket.

EFFECT: technical result is the unimpeded descent of a small-sized pumping unit into a tubing string using a carrying cable.

1 cl, 4 dwg