HYDROMECHANICAL ANCHOR Russian patent published in 1994 - IPC

FIELD: oil and gas production industry. SUBSTANCE: anchor is provided with shank rigidly connected to branch pipe support. Shank is arranged in annular hollow between rod and body and connected to rod by means of splined joint, and branch pipe is installed for conjugation of external end of its support with internal projection of body and interaction of lower end of support with external projection of rod. In this case, distance from upper conical part of cone to upper end of tool slips is smaller than distance between rod projection and lower end of branch pipe support, and the latter is smaller than distance between projection of sub and upper end of internal projection of body. EFFECT: higher operation reliability due to elimination of premature landing and its easy withdrawal. 3 dwg