F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 7/02 (2006.01) E21B 23/02 (2006.01) E21B 33/13 (2006.01) E21B 33/14 (2006.01) E21B 43/10 (2006.01)
Patent
CA 2293095
A pack-off bushing for placement inside an outer conduit while a fluid is passed through an inner conduit positioned within the outer conduit. The bushing includes a mandrel having a mandrel passage extending axially therethrough, a housing carried on the mandrel and capable of axial movement relative to the mandrel and a balancing system associated with the mandrel and the housing for applying a balancing force to the mandrel to oppose an axial mandrel force applied to the mandrel.
Gillis Ian
Knull Craig
Emery Jamieson Llp
Halliburton Energy Services Inc.
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