HYDRO-MECHANICAL ANCHOR Russian patent published in 2010 - IPC E21B23/06 

FIELD: oil and gas production.

SUBSTANCE: invention refers to facilities for holding equipment, such as packers and jacks, in well. The hydro-mechanical anchor consists of a hollow rod with radial channels and of a case with an internal lug in an upper part forming a circular chamber between them. A piston coupled with dies and a pusher from inside interacting with dies are positioned in this chamber. On top the rod is connected with the case. The rod is spring-loaded from below and performs restricted motions downward. The case is equipped with openings communicated with a lower part of the circular chamber wherein there are arranged dies hinged atop the windows. Inside, the dies have an inclined recess expanding from central axis. From below the pusher is rigidly connected with the piston and is equipped with external lugs having extensions for corresponding recesses of the dies.

EFFECT: reliable operation, simple design, avoiding packer seating at its lowering into well, eliminating additional manipulations with drill column at anchoring.

4 dwg