Expanded liner system and method

A borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14 , which may offset at a selected bend angle. A gauge section 34 is secured to the bit 16 has a uniform diameter bearing surface along an axial length of at least 60% of the bit diameter. The axial spacing be...

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Bibliographic Details
Main Author CHEN CHEN-KANG D.,GLEITMAN DANIEL D.,RAO VIKRAM M
Format Patent
LanguageEnglish
Published 24.05.2006
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 borehole may be drilled utilizing the bottom hole assembly 10, 50 with a downhole motor 14 , which may offset at a selected bend angle. A gauge section 34 is secured to the bit 16 has a uniform diameter bearing surface along an axial length of at least 60% of the bit diameter. The axial spacing between the bend and the bit face is controlled to less than fifteen times the bit diameter. After drilling a section of the well with the BHA according to the present invention, a tubular may be inserted in the well by passing the tubular through an upper tubular, then the inserted tubular expanded while downhole to a diameter substantially equal to the expanded tubular.
Bibliography:Application Number: CN200480011014