E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 17/03 (2006.01)
Patent
CA 2524502
The present invention relates to a drill string for upward drilling and components therefor. The drill string comprises a shank adapter (11,14), a starter rod (25), an extension rod (26) and a drill bit (15). Said components having means (13,22,14A,14B;17) for transferring impact waves and flushing medium. The shank adapter comprises a second shank adapter portion (14) releasably connected to a first shank adapter portion (11).
La présente invention se rapporte à un train de tiges de forage pour forage montant et à des composants associés. Le train de tiges de forage comporte un adaptateur de fût (11, 14), une tringle de démarrage (25), une tringle de prolongement (26) et un trépan (15). Lesdits composants comportent des moyens (13, 22, 14A, 14B; 17) conçus pour transférer des ondes de choc et le liquide de rinçage. L'adaptateur de fût comporte une seconde partie d'adaptateur de fût (14) raccordée libérable à une première partie d'adaptateur de fût (11).
Cosic Vlado
Helin Aimo
Gowling Lafleur Henderson Llp
Sandvik Intellectual Property Ab
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