DOWNHOLE PACKOFF ASSEMBLY

A packoff assembly 10 for use in a wellbore includes a packer body 42, 43, a nd a packoff element 12, and a mandrel 40 each supported on the packer body. The packoff element supports a rigid formation ring 15 thereon, and extends continuously from above the rigid ring to below the rigid ring and act...

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Bibliographic Details
Main Author JORDAN, GARY D
Format Patent
LanguageEnglish
French
Published 05.05.2001
Edition7
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A packoff assembly 10 for use in a wellbore includes a packer body 42, 43, a nd a packoff element 12, and a mandrel 40 each supported on the packer body. The packoff element supports a rigid formation ring 15 thereon, and extends continuously from above the rigid ring to below the rigid ring and acts to minimize an axial force required to set the packer assembly in the wellbore. Both the upper surface and the lower surfac e of the rigid ring may be tapered relative to a centerline of the packer body. According t o the method of the present invention, the packer assembly may be reliably set in the wellbo re by applying a relatively low axial force to the mandrel. This reduced axial force requir ed to set the packer contributes substantially to the benefits of the packer assembly.</SD OAB>
Bibliography:Application Number: CA20002325105