PREMIUM ROTARY SHOULDERED CONNECTION Russian patent published in 2020 - IPC E21B17/42 F16L15/00 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: group of inventions relates to threaded pipes and connections of such pipes, which can be used in oil and gas industry. Threaded pipe connection contains a nipple having external thread, sealing surface of nipple and thrust end of nipple, located on free end, and a coupling for receiving a nipple, having an internal thread intended for interaction with an external thread and a thrust ledge of the coupling, intended for contact with the thrust end of the nipple. Sealing surface of the coupling is intended for contact with the sealing surface of the nipple, wherein the nipple and the coupling define a longitudinal axis. Thrust end face of the nipple has the first outwardly facing thrust surface of the nipple and the second thrust surface of the nipple turned inwards. At that, the first thrust surface of the nipple crosses the axis perpendicular to the longitudinal axis at the first angle, and the second thrust surface of the nipple crosses the perpendicular axis at a second angle, wherein the first thrust surface of the nipple is longer than the nipple second thrust surface, wherein absolute value of first angle is greater than absolute value of second angle. Thrust ledge of coupling has first thrust surface of coupling facing inward, and second outward facing thrust surface of coupling. At that, the first thrust surface of the coupling crosses the axis perpendicular to the longitudinal axis, at the third angle, and the second thrust surface of the coupling crosses the perpendicular axis at the fourth angle, wherein the length of the first thrust surface of the coupling is greater than the length of the second thrust surface of the coupling.

EFFECT: technical result is improved sealing properties of the seal.

12 cl, 19 dwg