PIPE ELEMENT FOR DRILLING AND DEVELOPMENT OF HYDROCARBON WELLS AND FORMED BY IT THREADED JOINT Russian patent published in 2017 - IPC E21B17/42 F16L15/00 

FIELD: mining.

SUBSTANCE: invention relates to drilling and development of hydrocarbon wells, namely to a pipe element threaded joint. Assembly for making a threaded joint comprises the first and the second pipe elements with a rotation axis, each being provided with a male and a female ends, respectively. At least one of the male and the female ends terminates in an end surface with the first thrust surface able to enter in a compressing contact, when the connection is in the screwed-together state, with the second thrust surface provided on the bearing wall made on the other end. Herewith at least one of the first and the second thrust surfaces cross a slot, thus forming a zone of external thrust and a zone of internal thrust. Herewith in the screwed-together state the zones of external and internal thrusts are not in the same plane, as the result of which contact pressure P_int(a) in the zone of internal thrust near the slot is greater than or equal to the minimum value of contact pressure P_ext(min) in the zone of external thrust.

EFFECT: technical result is reduction of the risk of leakage from the pipes inner part into the outer one.

12 cl, 12 dwg