B - Operations – Transporting – 23 – C
Patent
B - Operations, Transporting
23
C
B23C 3/32 (2006.01) B23Q 5/10 (2006.01) B23Q 15/10 (2006.01) B24B 5/40 (2006.01) E21B 4/02 (2006.01)
Patent
CA 2741782
Machining systems (10, 20, 30, 40, 50, 60, 70, 90; figs 1-9) and methods of their use for material treatment or removal within a member (T) are disclosed. Each system has a spindle (12) powered by a motor (17, 17' '; figs 1-3 & 9) or motors (17a & 17b; figs 4-7) positionable within the member (T) during operation. To provide increased resistance to torsional cutting forces a preferred embodiment (90; fig. 9) includes two concentric pipe members (95, 94), one of which (94) is rotated by an actuating mechanism (110A, HOB or HOC,- figs 1OA, 1OB and 10C) to prestress the other (95). Another preferred embodiment (fig. 9) includes a steady support (9' ', 18; figs 9 or A9) to support the system (90) in the member (T). A control system (42, 43a, 43b; fig. 4) including a sensor (43a, 43b) and control mechanism (42) can maintain the spindle (12) at the required speed. The machining system may be used for machining helical grooves (84; fig. 8), in a tube or pipe (T) in order to manufacture a stator (80; fig. 8) for a down-hole motor.
Linvention concerne des systèmes et des procédés pour traiter un matériau à lintérieur dun élément ou pour le retirer de lélément. Selon certains aspects, ces systèmes comprennent un arbre alimenté par un ou plusieurs moteurs pouvant être positionnés dans lélément pendant le fonctionnement de larbre. Selon des aspects particuliers, ces systèmes et ces procédés permettent de former un stator destiné à un moteur de fond de trou.
Blake Cassels & Graydon Llp
National Oilwell Varco L.p.
LandOfFree
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