HYDRAULIC ANCHOR Russian patent published in 2008 - IPC E21B23/00 

FIELD: mining.

SUBSTANCE: anchor contains connected to pipe string cavity package, leakproof communicated on the inside with pipe string, with flexible collar, end-linked to body and outfitted on the inside by concentric transient adapter implemented with ability of limited axial advance relative to body. Collar is located inside of body, on which between flexible collar edges are implemented longitudinal grooves, outfitted by anti-flowing, interacting on the inside with flexible collar, and on the outside of flexible collar edges on body there are made internal backstop, at that transient adapter is implemented in the form of hollow bushing with external backstops by the ends, interacting on the outside of flexible collar with appropriate internal backstops of body. Provides reliable fixation of equipment in cased and open wells, carries considerable axial loads.

EFFECT: reliability improvement of hydraulic anchor operating.

4 dwg