ELECTROMECHANICAL DRILLING ASSEMBLY Russian patent published in 2014 - IPC E21B7/00 E21B4/04 E21B25/00 

FIELD: process engineering.

SUBSTANCE: invention relates to drilling and can be used for drilling deep wells in arctic ice. Proposed drilling assembly comprises rotatable drill pipe, cable lock, electric compartment, pump assembly, slurry collector including screen filter with central perforated pipe. The latter is arranged over, at least the entire filter length and has extra screen to cover its perforated bores. Note here that pipe top end is exposed while filter chamber in circular clearance between outer and inner screens is closed. On the contrary, pipe bottom end is closed while said chamber is open due to flow-through detachable case.

EFFECT: expanded operating performances at higher run speed in ice drilling at temperatures approximating to that of phase transition.

4 dwg