AUTO REVERSING EXPANDING ROLLER SYSTEM

Apparatus and methods of expanding a portion of a tubular are provided. The expansion apparatus includes a rotary expander for expanding an expandable tubular. A spline assembly is provided for coupling the rotary expander to a motor disposed on a work string. The spline assembly allows th e rotary...

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Bibliographic Details
Main Authors TRAN, KHAI, MURRAY, MARK, MACKAY, ALEXANDER CRAIG, MAGUIRE, PATRICK G
Format Patent
LanguageEnglish
French
Published 25.08.2009
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:Apparatus and methods of expanding a portion of a tubular are provided. The expansion apparatus includes a rotary expander for expanding an expandable tubular. A spline assembly is provided for coupling the rotary expander to a motor disposed on a work string. The spline assembly allows th e rotary expander to be rotated by the motor and move axially relative to the motor. The rotary expander includes two rows of rollers for expansion against the tubular. The position of the rollers on the first row is skewed in one direction relative to the longitudinal axis. The rollers on the second row are skewed in an opposite direction. When actuated, the skew angle of the rollers will cause the expander tool to move axially. Alternating actuation between the two rows of rollers causes the expander to move in opposite axial directions during expansion.
Bibliography:Application Number: CA20032617489