MECHANICAL PACKER Russian patent published in 2010 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry and can be implemented at development and operation of oil and gas wells for sealing their various zones. Units of sealing and anchoring are installed on rod 1 equipped with a lengthwise slot and connecting thread 3 and 4 on ends; cone 5 designed to travel lengthwise is arranged between the said units. Rotating bushing 6 with a system of shaped slots is mounted on rod 1. The sealing unit consists of packing element 12 enveloping rod 1 on sides and made out of elastic material and of stop 13 of packing element 12. The anchor unit contains cylinder sleeve 14 with pins secured onto it, the said pins enter sections of the slot system of bushing 6. The pin secured on sleeve 14 enters the lengthwise slot of rod 1. Spring loaded slip sockets 19 are attached to sleeve 14; the slip sockets are equipped with teeth 22 and decline from rod 1 in radial direction for engagement with internal walls of a casing pipe. The packer is secured to the flow column (FC) and is lowered to a place of anchoring (packing). Tube space is sealed by reverse motion of the packer in the well due to lengthwise compression of packing element 12 applying force to it with stop 13. The packer is reliably blocked in a transport position with symmetrical U-shaped sections of shaped slot system of bushing 6.

EFFECT: increased reliability and convenience of packer operation.

6 cl, 10 dwg