PACKER FOR OPEN BOREHOLES Russian patent published in 2014 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: invention can be used in packers for sealed isolation of borehole intervals in uncased hole. Packer comprises barrel, union, seal with conical supports and slips. Slips are shaped to trapezoidal rod. One end of top and bottom slips is articulated in top and bottom thrusts while slip opposite end extending outward is streamlined. Conical surface of conical supports and slip surface in contact with that of the latter have rectangular ledges. Slips are permanently pressed against the conical support by leaf springs. Packer is equipped with assembly for protection against spontaneous landing. Said protection assembly consists of the bush with groove to receive split ring rib extending over the entire outer surface thereof.

EFFECT: ruled out seizure of packer, free displacement of packer in borehole, decreased sizes and weight.

1 dwg