E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/02 (2006.01) E21B 33/06 (2006.01) E21B 33/068 (2006.01)
Patent
CA 2311417
A stripper/packer for sealing against tubing being moved therethrough is disclosed. The stripper/packer of the present invention includes sealing elements which are urged against a tubing being moved into or removed from a wellbore to isolate the pressure in the wellbore. The sealing elements of the present invention are comprised of a non-pliable material and are preferably comprised of an ultra-high molecular weight (UHMW) plastic. The UHMW sealing elements are urged into sealing engagement with the tubing so that as the tubing passes therethrough the wellbore pressure is isolated. UHMW sealing elements may be used in stripper/packers which apply pressure laterally to cause the sealing elements to engage the sides of the tubing, or in stripper/packers that apply pressure to the top and bottom of the sealing element to cause the element to compress and seal around the tubing.
Adams William C.
Marshall Mike E.
Halliburton Energy Services Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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