DRILLING ASSEMBLY FOR WELL (VERSIONS) AND SUPPORT MECHANISM AND TURBINE POWER PLANT FOR DRILLING ASSEMBLY Russian patent published in 2010 - IPC E21B4/02 

FIELD: oil and gas production.

SUBSTANCE: drilling assembly for well comprises drilling bit, rotary driving plant for development of rotary driving force, reducer mechanism joined to driving plant and to drilling bit and arranged in case of reducer mechanism, driving shaft for transfer of rotary driving force via reducer mechanism to drilling bit, and support mechanism, comprising support unit, including bearings and separately joined to reducer mechanism, and when used, arranged over reducer mechanism and connected relative to it so that support unit is arranged at the distance in longitudinal direction from end of reducer mechanism case and with the possibility to prevent transfer of axial hydraulic loads sensed by support unit, via driving shaft to reducer mechanism.

EFFECT: isolation of reducer mechanism from vibrations and heat generated by support unit under conditions of drilling assembly operation and replacement of support unit and reducer mechanism with minimum violation of normal process of drilling operations.

29 cl, 20 dwg