DEEP SAMPLE TAKER Russian patent published in 1998 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this is used in geological investigation for taking deep samples of liquids from wells and water basins. Deep sample taker has body with non-return valve and safety valve which is installed on seat of non-return valve for connecting body hollow with annular space. Body fixing unit incorporates electromagnet with housing, cable shoe at its upper end and rod-pusher at its lower end and is movably installed in body. Also provided are holder, and locking members. Piston of sample taker is made with at least two sealing members in the form of tapered sleeves facing each other by their large bases and secured on housing of electromagnet. Sensor of sample taking termination is installed between electromagnet and cable shoe. EFFECT: higher efficiency. 4 cl, 2 dwg