PACKER WITH OR WITHOUT CABLE BUSHING (VERSIONS) Russian patent published in 2012 - IPC E21B33/12 

FIELD: oil-and-gas industry.

SUBSTANCE: set of inventions relates to production of hydrocarbons. Proposed packer comprises barrel from one or two, one-in-another, parts and seal arranged on barrel between top and bottom supports. In compliance with first version, distance between said supports exceeds that of aforesaid seal. Note here that, at least one equalising channel is made between supports on barrel body or in said seal to allow hydraulic communication between spaces above and below said seal in upward displacement of packer. In compliance with second version, at least one lengthwise channel is made outside said barrel, inside or outside of top and bottom supports and seal, that has, at least, blank bottom on one side and, on the other side, an open surface with or without dovetail, or split gland to allow cable or its conductors to be laid therein and sealed in seal element channels at contraction during fitting the packer in well. Packer may be furnished with anchoring device consisting of cone, rams and ram holder, or fluid flow-resisting element of U- or V-shape, rubber or gland jointed from below by ram holder, or with barrel with one or several lateral lengthwise channels to accommodate differential or spring-loaded piston composed of ram holder pusher.

EFFECT: higher reliability, simplified design, better tightness.

2 cl, 28 dwg