Whipstock packer assembly
This patent describes a packing assembly for sealing between an inner mandrel and a well casing, the assembly having expandable slip-type anchoring means mounted to the mandrel, a plurality of sleeves slidably mounted coaxially on the mandrel and means for setting the anchoring means. The improvement consists of: packing means to sealingly engage the well causing and the inner mandrel. The packing means including a pair of resiliently deformable annular packing elements mounted on the inner mandrel and an annular spacer ring mounted on the inner mandrel between the packing elements, the space ring extending partially beneath the packing elements and including means for sealingly engaging the inner mandrel, the spacer ring having axially opposed sloped surfaces adapted to guide the packing elements toward the well casing, and means for compressing the packing means into sealing engagement with the well casing while preventing extrusion of the packing elements, the compressing means mounted on the inner mandrel axially above and axially below the packing means. The space ring being axially movable in response to pressure variations to variably deform the packing elements when the packing elements are in sealing engagement with the well casing thereby enhancing the sealing arrangement of the packing elements with the well casing and the inner mandrel.
- Assignee:
- Drilex Systems, Inc., Houston, TX
- Patent Number(s):
- US 4765404
- OSTI ID:
- 6502420
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLUID MECHANICS
HYDRAULICS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
OPERATION
PACKINGS
PIPES
SEALS
SLEEVES
TOOLS
WELL CASINGS
WELL COMPLETION
WELLS