Asymmetrical drill stem for drilling oil wells

Details Asymmetrical drill stem for drilling oil wells Asymmetrical drill stem for drilling oil wells

E - Fixed Constructions

21

B

E21B 17/16 (2006.01)

Patent

CA 2248203

The invention concerns an asymmetrical drill stem, located at the end of an assembly of boring rods for drilling an oil well. The asymmetry is provided by the presence of recesses (24) arranged in the body (20), which recesses are of different sizes, arranged on the external surface of the drill stem and extend for the major part along the drill stem.

L'invention concerne une masse-tige asymétrique, située à l'extrémité d'un train de tige de forage d'un puits pétrolier. L'asymétrie est conférée par la présence d'évidements (24) aménagés dans le corps (20), lesquels évidements sont de tailles différentes, disposés sur la surface externe de la masse-tige et s'étendant en grande partie le long de la masse-tige.

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