ELECTRO-MECHANICAL WELL POWER SOURCE Russian patent published in 2006 - IPC H02K5/12 E21B47/22 

FIELD: electric engineering, namely, engineering of autonomous sources of electric power for telemetry systems used during drilling of oil and gas wells with complex spatial trajectory for shaft driving.

SUBSTANCE: proposed electro-mechanical well power source contains through cover 1, inside which with possible immersion in liquid immovable and movable parts of electric generator 2 and 5 are positioned, respectively. Immovable part 2 contains stator with open magnetic duct 3 and winding 4 of stator, and movable part 5 contains hydro-turbine 6 with central shaft 7 and rotor-inducer 8. open magnetic duct 3 and winding 4 of stator are separated from movable part 5 by non-magnetic, transverse relatively to geometric axis of O - O generator, wall 11 for isolating two hollows 12 and 13, respectively, of both its parts 2 and 5, and open magnetic duct of stator with winding on it is positioned relatively to poles of inducing rotor with possible electromagnetic effect of these elements of both parts of electric generator through its non-magnetic wall. In accordance to invention, open magnetic duct of stator is provided with additional U-shaped section, closing its magnetic circuit by its ends, positioned coaxially to inducer-rotor on the other side of non-magnetic wall in hollow of movable part of electric generator.

EFFECT: increased specific power of device when all other parameters and conditions remain the same, in particular, in constrained dimensions of drilling column.

3 dwg