DEVICE FOR LOADS TRANSFER IN SMALL DIAMETER WELLS Russian patent published in 2016 - IPC E21B23/03 

FIELD: machine building.

SUBSTANCE: invention relates to hoisting devices and can be used for lifting and lowering of research equipment, drilling tools in small diameter super-deep wells during drilling of Antarctica ices. Device can also be used for monitoring and analysis of deep wells casing pipes walls technical state. Device includes housing, drive, drive screw, telescopic cylinders, clamps, rotating relative to fixed housing, drum with holes for traction element (for example, cable). At that, telescopic cylinders are made with longitudinal slots and guide pins and equipped with fasteners in form of balls with springs, which number is proportional to cross-sections of cylinders, which inner surfaces have cylindrical holes depth equal to 0.5 of ball diameter. At that, upper telescopic cylinder is rigidly connected to housing equipped with drum with internal engagement rim with possibility of rotation relative to housing axis, and lower telescopic cylinder is made with nut interacting with drive screw, connected with device drive.

EFFECT: technical result consists in possibility of arrangement of cable with considerable length (up to 700 m) on movable telescopic cylinders, which guarantees load lifting-lowering to required depth and at that provides minimum dimensions of device, corresponding to small diameter (up to 127 mm) wells sizes.

1 cl, 8 dwg