Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Separate means upstream and downstream of blade set
Reexamination Certificate
2011-08-02
2011-08-02
Wiehe, Nathaniel (Department: 3745)
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Separate means upstream and downstream of blade set
C415S211200, C415S903000
Reexamination Certificate
active
07988409
ABSTRACT:
The present invention provides means to extend the flow rate range over which a downhole turbine70will return a power output sufficient to meet the minimum downhole power requirements. In one embodiment, the present invention relates to an arrangement of axial vanes77that are situated such that the rotation of the rotor76generates an increasing drag force, thereby extending the upper limit of the flow rate range. In another embodiment, the present invention relates to an arrangement of restriction assemblies75that can be used to maximize the fluid velocity relative to the fluid flow rate past the stator74to achieve the necessary speed and power to rotate rotor76, thereby extending the lower limit of the flow rate range. In another embodiment, the axial vanes77and restriction assemblies75are used in combination to further extend both the upper and lower limits of the flow rate range of the downhole turbine70.
REFERENCES:
patent: 1348815 (1920-08-01), Lewis
patent: 4725197 (1988-02-01), Russell et al.
patent: 4956823 (1990-09-01), Russell et al.
patent: 5119344 (1992-06-01), Innes
patent: 5189645 (1993-02-01), Innes
patent: 5357483 (1994-10-01), Innes
patent: 6402465 (2002-06-01), Maier
patent: 7101146 (2006-09-01), Coull et al.
patent: 2003/0056985 (2003-03-01), Hahn et al.
patent: 2005/0117453 (2005-06-01), Lehr
patent: 2005/0129501 (2005-06-01), Coull et al.
patent: 2006/0260806 (2006-11-01), Moriarty
Griffin Jeff
Schlumberger Technology Corporation
Welch Jeremy
Wiehe Nathaniel
LandOfFree
Method and apparatus for extending flow range of a downhole... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for extending flow range of a downhole..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for extending flow range of a downhole... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2728286