PACKER Russian patent published in 1997 - IPC

FIELD: oil and gas industry. SUBSTANCE: packer is used for isolation of bore-hole at carrying out various technological operations in it, including those which are connected with cyclic variation of temperature of working agents being injected into well. Packer has barrel and installed on it is slip socket unit together with sealing member with hydraulic actuator. This actuator has detent for fixing piston in position. Device is also provided with additional slip socket unit mounted on barrel. Power cylinder of sealing member hydraulic actuator is fastened on barrel. EFFECT: high operational reliability, easy removal and raising. 1 cl, 1 dwg