Drill pipe with helical ridge for highly angulated wellbore

Details Drill pipe with helical ridge for highly angulated wellbore Drill pipe with helical ridge for highly angulated wellbore

E - Fixed Constructions

21

B

255/24

E21B 17/00 (2006.01) E21B 7/04 (2006.01) E21B 17/22 (2006.01)

Patent

CA 2037449

DRILL PIPE WITH HELICAL RIDGE FOR HIGHLY ANGULATED WELLBORE Abstract The drilling of highly angulated wellbores (with a rotary rig having a drill string terminated with a bit wherein drilling fluid is employed) is improved by employing in the highly angulated drill string a length of drill pipe which has a helical ridge disposed thereabout such that the flight of the helical ridge is wound so as to rise from the bit with the rotation of the drill string and the height of the helical ridge above the length of the surface of the drill pipe is 1 to 15 percent of the diameter of the drill pipe.

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