PACKER EQUIPMENT FOR ISOLATING OPERATIONS IN WELL Russian patent published in 2013 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: drillable packer consists of a mandrel with thread at outside surface, sealing element, bursting liners and cones. Butt of the lower bursting liner is inclined. In the upper part of packer mandrel there is an upper divider in the form of a disc valve. Hydraulic adjustment tool consists of the rod connected to adapter, the upper and lower cylinders. Between the rod and upper cylinder there are driving washers and fixed hub which form several cavities. The upper cylinder and adapter, the lower cylinder and body of the disc valve are connected by shear bolts. Basket with radial overflow holes and radial holes for latches resting on lip of the mandrel lower part is connected to the lower part of adapter. Saddle for a drop ball is fixed to the basket by shear bolts. The basket is connected to end bushing through crossover shoe. Limit ring and the lower divider in the form of centring plug with collar spring are fixed to the end bushing by shear bolts.

EFFECT: invention prevents premature operation of hydraulic adjustment tool, provides reliable setting of packer, improves packer tightness and reliability of tool connection-disconnection mechanism for hydraulic adjustment tool with drillable packer.

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