THREAD LOCK CONNECTION FOR OIL AND GAS PIPES Russian patent published in 2021 - IPC E21B17/42 F16L15/04 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to threaded joints for oil and gas pipes. Threaded locking joint for oil and gas pipes contains female part and female part. At that, the female part is a tubular body of the lock joint containing a threaded connecting section and a sealing section, which follows after connecting section. Female part comprises a tubular body, which comprises a first section, which outer surface is threaded, and a second sealing section comprising a sealing surface that interacts with the sealing surface of the female part to seal the lock joint. At that, the sealing surface of the female part consists of conical sections, the sealing surface of the male part contains a proximal segment, which is located closer to the first section, and a distal portion. At that, the proximal composite segment is a conical surface, which forms first seal with sealing surface of female part, and distal section is characterized by presence of convex surface, which forms second seal with sealing surface of female part.

EFFECT: technical result is higher sealing efficiency of threaded joint.

17 cl, 13 dwg