DEVICE FOR SETTING SHANK END OF CASING IN WELL Russian patent published in 2011 - IPC E21B43/10 E21B33/14 

FIELD: gas-and-oil producing industry.

SUBSTANCE: device consists of complex case with packing and anchor unit, with pusher of packing unit and funnel coupled with pusher. Further, the device consists of a transport column and stem with retractable cams. The stem is connected to the transport column. Also, in a lower part the case is connected to the shank end. The stem has a radial opening overlapped with an intermediate bushing with a setting seat; the bushing is tied with the stem by a shear element and contains a split spring-loaded collet with hooks on its leaves for corresponding lugs of an upper part of the case. A profiled bushing connected with the stem by means of the shear element and interacting with leaves of the collet is positioned in a circular cavity formed between the stem and an upper part of the case. The profiled bushing travels axially when the cavity of the stem is hydraulically coupled via its radial opening with the circular cavity, thus the collet is released from connection with the upper part of the case, and the stem is disconnected from the case. Upon disconnection, weight of the transport column is transferred to an upper end of the funnel via retractable cams of the stem and the packing unit is actuated into a working position.

EFFECT: increased reliability of device operation in well due to avoiding packing unit pre-triggering.

7 cl, 4 dwg