METHOD AND DEVICE FOR PERFORMING OPERATIONS IN UNDERGROUND WELLS Russian patent published in 2011 - IPC E21B19/22 

FIELD: mining.

SUBSTANCE: device for performing operations in underground well, which contains system of flexible pipes, the first support, flexible pipe introduction device and drum of flexible pipes, the second support separated from the first support, drill tower installed on the second support, upper drive installed on drill tower, for its movement along it in longitudinal direction, elevator having the possibility of being engaged with flexible pipe introduction device and movement of the above device from the support to the position in which the above introduction device is aligned with upper drive and suspended to the drive or drill tower, and torque moment limit stop connecting the drill tower to flexible pipe introduction system in order to prevent reactive displacement of the above flexible pipe introduction device relative to the drill tower. In the well shaft the operation that includes supply of flexible pipes from drum through flexible pipe introduction device to the well shaft is performed; at that, at least some part of the weight of the above device and at least some part of the weight of flexible pipe in the well shaft belongs to drill tower.

EFFECT: quick switching between operations with flexible pipes and operations using upper drive.

33 cl, 14 dwg