SEALED THREADED PIPE CONNECTION Russian patent published in 2023 - IPC F16L15/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of construction and repair of oil and gas wells and can be used in casing and other technological pipes with sealed threaded connections. Sealed threaded connection of pipes includes male and female parts of pipes connected by tapered threads and contacting support surfaces, of which the first surfaces in contact with each other are made respectively on the outer surface of the male and inner conical surfaces of the female parts of the pipes in the area between the tapered thread and the pipe. In this case, the second contact surfaces are made, respectively, on the male part of the pipe in the form of a conical end surface with a taper angle in the direction of the conical thread on this pipe, made at the transition section of the first conical surface of this pipe to its body. In the connection, the third contact surfaces are made in the form of a conical surface with a taper angle in the direction of the conical thread on the female pipe and a mating conical surface on the male part of the pipe.

EFFECT: increasing the reliability of the tightness of the connection; increasing the transmitted torque of the connection; the ability to work in wells with a small gap between the diameters of the well and the string while maintaining a constant inner diameter equal to the inner diameter of the pipe body; improving manufacturability; facilitating the make-up of the connection; technological simplicity of connection; positive impact on reliability indicators, in particular indicators of resource and endurance; increasing the operational manufacturability of the connection; expansion of the scope of this threaded connection design.

3 cl, 4 dwg