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Patent Searching and Data


Title:
CASING BITS, DRILLING ASSEMBLIES, AND METHODS FOR USE IN FORMING WELLBORES WITH EXPANDABLE CASING
Document Type and Number:
WIPO Patent Application WO/2010/127233
Kind Code:
A4
Abstract:
Casing bits include an expander for enlarging an inner diameter of expandable casing at least partially disposed within a body of the casing bits. Drilling assemblies include a casing bit attached to an end of expandable casing, and an expander disposed in proximity to the casing bit and a distal end of the expandable casing. Methods of forming casing bits include positioning an expander in proximity to a body of a casing bit. Methods of forming drilling assemblies include positioning an expander in proximity to a body of a casing bit and a distal end of expandable casing, and attaching the casing bit to the end of the expandable casing. Methods of casing a wellbore include one or both of drilling and reaming a wellbore using a casing bit attached to a distal end of expandable casing, and forcing an expander through the expandable casing.

Inventors:
MARVEL TIM KING (US)
MEINERS MATTHEW J (US)
EVANS JOHN G (US)
Application Number:
US2010/033150
Publication Date:
May 26, 2011
Filing Date:
April 30, 2010
Export Citation:
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Assignee:
BAKER HUGHES INC (US)
MARVEL TIM KING (US)
MEINERS MATTHEW J (US)
EVANS JOHN G (US)
International Classes:
E21B7/28; E21B10/43; E21B10/567
Attorney, Agent or Firm:
WELBORN, Brian, S. et al. (Intellectual Property CounselP.O. Box 474, Houston TX, US)
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