FIELD: investigation of wells; applicable in taking samples of fluid with dissolved gas. SUBSTANCE: device hollow body has circular bores for packing rings. Immovably fastened in body through hole is hollow bushing accommodating leverage unit. It has a pair of bell-cranks loaded with spring in upper part and hinged to lower part. A pair of longitudinal windows are made on side surface of hollow bushing in plane of motion of bell-cranks. Locking unit has rod whose upper end carries pressing nut engageable with bell-cranks. Secured to rod lower end is adjusting nut. Rod is loaded with a return spring. Pressing sleeve with rubber seal is rigidly secured to body by screws. Force unit is presented by conical weight. EFFECT: reliable design of device and qualitative sampling. 2 dwg
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