HYDRO-MECHANICAL ANCHOR Russian patent published in 2010 - IPC E21B23/00 

FIELD: oil and gas production.

SUBSTANCE: disclosed here invention refers to oil and gas industry, particularly to facilities for retaining equipment in borehole, such as packers, jacks, wedge deflectors, etc. The hydro-mechanical anchor consists of a cover with an inclined guide, of a die with a recess designed to travel upward along inclined surface of the case, and of a spring-loaded and positioned in the recess of the die insertion projecting outward beyond dimensions of the die. Also the case has a process groove, while the recess of the die is of a cylinder shape and with axis perpendicular to axis of the case. The die recess has a through opening in a base of the recess. The insertion is spring loaded inside and is made in form of a hydraulic piston. It is equipped with a pin matching the through opening. In a transport position the projecting part of the pin interacts with the process groove of the case to fix the case and the die one relative to another. An internal cavity formed with the insertion and the recess communicates with the pipe string by means of a flexible tube positioned within the boundaries of the case and the die.

EFFECT: upgraded reliability, simple design, elimination of slacking-off at lowering into well, including open borehole, multiple increase of anchoring effort due to designed increase of working surface.

4 dwg