MOUNTED ON STRING AUTOMATIC ADAPTER TO FORMATION TESTER Russian patent published in 1995 - IPC

FIELD: oil prospecting. SUBSTANCE: mounted on string automatic adapter to formation tester has: body bush with longitudinal canals and holes, that is mounted on locking bush with ring-type recess; movable in axial direction ring-type piston with holes and recess; roll-type bolt, that is set in body bush so, as to be capable to be located in locking bush recess and ring-type piston recess; spring-loaded in respect to body bush branch pipe with holes, that forms with body bush cavity communicated in ring-type piston extreme lower position with radial canals of body and in floating piston extreme upper position with holes of blind bush. Besides, it has locks to fix blind bush and ring-type piston in respect to body. EFFECT: increased equipment operational reliability and amount of more full information about hydrodynamic characteristic of formation. 2 cl, 5 dwg