DISCONNECTOR Russian patent published in 1996 - IPC

FIELD: accident elimination by washing off slurry plug and assured disconnection of non-caught part of tool from caught one. SUBSTANCE: disconnection of case and coupling is carried out by left-hand thread after its deblocking using displacement of torque transmitting unit made in the form of coincided radial slots at lower butt of the case and coupling where rests are installed. The rests are hinged to sleeve movable in radial direction, and are connected to the coupling through additional fixers. The sleeve is connected to the case through spring fixers. Washing off slurry plug is carried out through radial passages in the case and coupling which are overlapped with the sleeve when they are in initial position. EFFECT: accident elimination in well drilling. 9 cl, 3 dwg