E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/043 (2006.01) E21B 17/042 (2006.01)
Patent
CA 2219893
The present invention relates to a threaded coupling between a female extension member (12) and a male extension member (32) in a drill string for percussive drilling. The female extension member (12) is provided with an internal thread (18) and the male extension member (32) is provided with an external thread (34). The internal and external threads respectively are designed for engagement with each other. The present invention relates to a coupling sleeve (32) that can be safely secured in one (12) of the extension drilling tubes/rods.
La présente invention concerne un manchon fileté permettant de raccorder une rallonge femelle (12) et une rallonge mâle (32) dans un train de sonde destiné au forage à percussion. On dispose sur la rallonge femelle (12) d'un filetage interne (18) et sur la rallonge mâle (32) d'un filetage externe (34). Les filetages interne et externe sont conçus respectivement pour assurer une prise mutuelle. Cette invention concerne également un manchon de couplage (32) que l'on peut fixer en toute sécurité dans l'une (12) des tiges ou tubes de rallonge de forage.
Gowling Lafleur Henderson Llp
Sandvik Ab
LandOfFree
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