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Patent Searching and Data


Title:
SPINDLE DRIVE SYSTEM AND METHOD OF MACHINING A MEMBER USING SUCH A SYSTEM
Document Type and Number:
WIPO Patent Application WO/2010/049724
Kind Code:
A3
Abstract:
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 pre-stress 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.

Inventors:
WILMOT WESSLEY (GB)
Application Number:
GB2009/051436
Publication Date:
June 24, 2010
Filing Date:
October 26, 2009
Export Citation:
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Assignee:
NAT OILWELL VARCO LP (US)
WILMOT WESSLEY (GB)
International Classes:
B23C3/32; B23Q5/10; B23Q15/10; B24B5/40; E21B4/02
Domestic Patent References:
WO2008129237A12008-10-30
Foreign References:
US5184927A1993-02-09
EP0172307A21986-02-26
DE9209821U11993-11-11
US3464313A1969-09-02
US4567450A1986-01-28
US7249918B12007-07-31
JPH1148139A1999-02-23
EP0451131A21991-10-09
Other References:
DATABASE WPI Week 197745, Derwent World Patents Index; AN 1977-K1097Y, XP002575922
Attorney, Agent or Firm:
LUNT, Mark (Harrison Goddard Foote, Fountain PrecinctBalm Green, Sheffield South Yorkshire S1 2JA, GB)
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