QUICK-DETACHABLE THREADED CONNECTION WITH MULTI-THREAD THREAD

摘要: FIELD: soil or rock drilling.SUBSTANCE: invention relates to drilling operations, namely threaded connection lock for of tools used in horizontal directed drill string. Threaded detachable downhole tool assembly string comprises lower end part made assembly, upper opposite and with membrane lock. Upper includes: coupling element a non-threaded first peripheral surface having middle inner diameter second greater than said diameter, cone-shaped section between non-thread surfaces, wherein includes thread on it. Lower nipple outer Note here that, at least, selected surfaces elements are slightly tapered. Thread sections forms multi-thread thread. At contains sub, which the connecting structure provided adapter has forming comprising conically shaped large small diameters, an intermediate zone second, nipple, structure, there multiple drive faces. Coupling faces, possibility alignment faces structures sub. Multi-thread shape sub is screwing mating form element, adjusted such that when joint screwed together contact do not match, so mismatch obtained.EFFECT: high strength durability connection.6 cl, 11 dwg