E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/10 (2006.01) E21B 17/00 (2006.01) E21B 29/00 (2006.01) E21B 29/10 (2006.01) F16C 33/12 (2006.01)
Patent
CA 2317553
A drill pipe (1; 12) has a journal (2; 15) formed thereon. Integrally formed stop collars (10, 11; 16, 17) are provided at each end of the journal (2; 15). The arrangement enables rotatable tools (18) to be fitted directly to a journal (2; 15) to reduce friction between the rotatable tool (18) and the journal (2; 15). The journal (2; 15) may be of a substantially greater length than the length of the rotatable tool (18) to facilitate lubrication and cooling. Alternatively removable stop collars (30; 31) are secured adjacent the ends of a journal (28) formed on the drill pipe (25). Methods of forming the journal surface (2; 15) during manufacture of a drill pipe are disclosed. There are also disclosed methods for reconditioning an existing drill pipe (20) to form a journal (21) thereon.
Ce tube de forage (1; 12) comprend un tourillon (2; 15) formé sur le tube et pourvu à ses deux extrémités de brides de blocage (10, 11; 16, 17). Cet agencement permet de fixer des outils rotatifs (18) directement sur un tourillon (2; 15) afin de réduire le frottement entre l'outil rotatif (18) et le tourillon (2; 15). Le tourillon (2; 15) peut être sensiblement plus long que l'outil rotatif (18) afin de faciliter la lubrification et le refroidissement. Des brides de blocage (30; 31) qui peuvent être alternativement enlevées sont assujetties à proximité des extrémités d'un tourillon (28) formé sur le tube de forage (25). L'invention concerne des procédés de façonnage de la surface du tourillon (2; 15) pendant la fabrication d'un tube de forage, ainsi que des procédés de reconditionnement d'un tube de forage existant (20) afin de former un tourillon (21) sur celui-ci.
Marks & Clerk
Weatherford U.s. L.p.
Weatherford/lamb Inc.
LandOfFree
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