Wellbore drilling technique using eccentric tool joints to...

Details Wellbore drilling technique using eccentric tool joints to... Wellbore drilling technique using eccentric tool joints to...

E - Fixed Constructions

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B

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E21B 7/06 (2006.01) E21B 7/04 (2006.01) E21B 17/10 (2006.01) E21B 21/00 (2006.01) E21B 31/03 (2006.01)

Patent

CA 1131209

9967 WELLBORE DRILLING TECHNIQUE USING ECCENTRIC TOOL JOINTS TO MITIGATE PRESSURE-DIFFERENTIAL STICKING Abstract of the Disclosure A rotary method and apparatus are described to mitigate differential sticking of a drill string during the drilling of a wellbore. Eccentrically bored tool joints are used for interconnecting joints of drill pipe together into a drill string for use in drilling the wellbore. The drill string is rotated in the wellbore, causing the drill pipe to be eccentrically moved in the wellbore during the drilling operation to better remove the cuttings from the wellbore and mitigate differential sticking of the drill string.

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