E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/20 (2006.01)
Patent
CA 2529588
A drilling tool that has a flexible shaft so as to be able to make short radius curves while still being able to transmit torque and axial loads. The drilling tool includes a drill shaft for transmitting axial load, comprising a series of coaxial ring members connected together such that adjacent ring members are flexible in an axial plane relative to each other; each ring member being connected to an adjacent ring member by connecting member arranged to transmit torque therebetween; and axial supports extend between adjacent ring members so as to transmit axial loads therebetween.
L'invention concerne un outil de forage pourvu d'une tige flexible de manière à pourvoir se courber selon un faible rayon tout en pouvant transmettre des charges de torsion et des charges axiales. Cet outil de forage comprend une tige de forage permettant de transmettre une charge axiale, comprenant une série d'éléments annulaires coaxiaux reliés ensemble de manière que les éléments annulaires adjacents soient flexibles dans un plan axial les uns par rapport aux autres ; chaque élément annulaire étant relié à un élément annulaire adjacent par connexion avec un élément conçu pour transmettre une torsion entre eux ; et des supports axiaux qui s'étendent entre les éléments annulaires adjacents de manière à transmettre des charges axiales entre eux.
Orban Jacques
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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