Wellbore drilling technique using eccentric tool joints to mitig

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

1979-04-04

1981-01-27

Leppink, James A.

Boring or penetrating the earth

Processes

Boring curved or redirected bores

175325, E21B 706, E21B 1702

Patent

active

042469759

ABSTRACT:
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.

REFERENCES:
patent: 2309791 (1943-02-01), Sanders
patent: 2841366 (1958-07-01), Dunn
patent: 3146611 (1964-09-01), Fox
patent: 3306378 (1967-02-01), Williams, Jr.
patent: 3382938 (1968-05-01), Williams, Jr.
patent: 3391749 (1968-07-01), Arnold
patent: 3642079 (1972-02-01), Van Note
Pressure-differential Sticking of Drill Pipe and How It Can be Avoided or Relieved, by Helmick and Longley, Shell Oil Co.

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