STRING HEAD SCREW UP DEVICE Russian patent published in 2009 - IPC E21B19/06 B25B21/00 

FIELD: oil-and-gas production.

SUBSTANCE: invention related to oil-and-gas production and geological research, meant for string head remote screw up. Includes base, installed on the string head flange, fixed on it socket, on which bottom cylindrical bore installed cylinder with rotation possibility, on the cylinder top cylindrical bore back installed tooth gear with rotation possibility, covered with a plate, installed inside of the cylinder, on which unit of hydro lines connection installed, on the socket external lateral surface fixed one side operating hydro cylinder for connection, at pressure absence, tooth gear with base, at that under plate fixed two plunger cylinders from the both sides, plungers executed in a middle part as tooth battens, located in plunger cylinders cases cuttings, for interaction with tooth gear.

EFFECT: work productivity and safety increase because of mechanised string head screw to casing string without use of drive mechanisms, also provided reliable sealing of screw connection.

5 dwg