Whipstock packer assembly

Details Whipstock packer assembly Whipstock packer assembly

E - Fixed Constructions

21

B

166/63

E21B 33/129 (2006.01) E21B 7/06 (2006.01) E21B 33/12 (2006.01) E21B 33/1295 (2006.01)

Patent

CA 1280362

ABSTRACT OF THE DISCLOSURE A packing assembly for a whipstock in which the whipstock can be run into a well casing to a level above the bottom and milling through the casing wall without having to make a round trip with the well string. The packing assembly includes slip-type anchors which initially set the assembly and packing elements which sealingly engage the well casing to seal off the casing while anchoring the device. Disposed between the packing elements is a spacer ring which is axially movable in response to the fluid pressure within the well casing to enhance the sealing engagement of the packing elements. The spacer ring includes an O-ring seal which provides improved sealing between the spacer ring and the inner mandrel to which it is mounted. In order to compress the packing elements while preventing extrusion thereof, an overleaf ring and retainer arrangement is provided thereby enhancing sealing engagement of the packing assembly.

563878

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