THREADED CONNECTION OF PUMP-COMPRESSOR PIPES Russian patent published in 2023 - IPC E21B17/42 F16L15/00 

FIELD: threaded connections of tubing pipes.

SUBSTANCE: claimed invention can be used to connect elements of tubing pipe columns used in the construction and operation of wells in oil, gas and gas condensate fields. The threaded connection of pump-compressor pipes contains male and female elements. At the ends of the female and male elements on the outer and inner surfaces, respectively, there are trapezoidal threads with a taper of 1:16 and sealing and thrust end surfaces forming an internal sealing unit, made at an angle of 14-16° to the normal of the thread centreline. The threads of the male and female elements are made with an inclination angle of the support face of the coil profile from -1 to +1° to the normal of the centre line of the thread and the angle of inclination of the embedded face of the thread profile 14-16° to the normal of the thread centreline. The tops of the thread profile are parallel to the centre line of the thread. The internal sealing unit is formed by sealing surfaces made on the male and female element with an inclination angle of 17-19° to the centre line of the thread, and the thrust end surfaces of the male and female elements. The internal sealing unit is equipped with additional surfaces made between the sealing surfaces and the thrust end surfaces on the male and female elements. The connection of the sealing surfaces with additional surfaces is made in the form of a concave spherical surface on the male element and a convex spherical surface on the female element.

EFFECT: tightness of the threaded connection of pump-compressor pipes is increased under the influence of combined multidirectional mechanical loads.

9 cl, 3 dwg