Drill strings, essentially for oil and gas well drilling,...

Details Drill strings, essentially for oil and gas well drilling,... Drill strings, essentially for oil and gas well drilling,...

E - Fixed Constructions

21

B

255/24

E21B 17/00 (2006.01) F16L 37/12 (2006.01)

Patent

CA 1243665

PRECIS DE LA DIVULGATION: Tige de forage destinée à creuser des puits dans le sol notamment pour l'industrie du pétrole et du gaz naturel. La tige comporte sur sa périphérie une surface de révolution dont la génératrice comprend une succession de profils contigus concaves arrondis de forme sensiblement torique, l'extrémité supérieure des profils concaves arrondis se prolongeant par une surface sensiblement conique aplatie et l'extrémité inférieure des profils concaves arrandis se prolongeant par une surface sensiblement conique. La surface de révolution est destinée à servir d'appui aux faces internes de forme complémentaires des mâchoires auto-serrantes qui assurent le maintien de la colonne de tige de forage.

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