Tube expander

A device 28 for expanding a tube 26, such as within a wellbore 16, comprises an expandable mandrel 35, which is compliant, or which is able to adapt to variations in the cross-section of the tube. The expansion device should be sufficiently stiff to expand the tube, while compliant enough to accommo...

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Bibliographic Details
Main Authors JOEL MCCLURKIN, CRAIG D JOHNSON, DENNIS L MILLS
Format Patent
LanguageEnglish
Published 29.10.2003
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 device 28 for expanding a tube 26, such as within a wellbore 16, comprises an expandable mandrel 35, which is compliant, or which is able to adapt to variations in the cross-section of the tube. The expansion device should be sufficiently stiff to expand the tube, while compliant enough to accommodate deviations such as narrower regions. The expandable mandrel may comprise a plurality of segments 36. The segments may be pivoted and biassed with springs 52.
Bibliography:Application Number: GB20020028643