ANCHOR FOR FIXATION OF DOWNHOLE EQUIPMENT Russian patent published in 2014 - IPC E21B23/04 

FIELD: oil and gas industry.

SUBSTANCE: anchor for fixation of downhole equipment includes a housing connected to the pipe string and a hollow rod, a cone with slips, a spring-actuated tube supported by the slips and mounted outside the housing with limited longitudinal motion downwards. A compression spring is installed between the upper thrust of the tube and the lower thrust of the housing while the slips are capable of radial motion outward, in regard to the tube under action of the cone. The housing with the tube is placed above the cone expanding from top downward. The lower thrust of the housing is made as a piston inserted hermetically into the tube which sealed space under the piston communicates with the rod cavity.

EFFECT: multiple and reliable fixation of hydraulic jack, guaranteed transport position during tripping out.

1 dwg