Fluid erosion protection washer for rotating shaft in MWD tool

Details Fluid erosion protection washer for rotating shaft in MWD tool Fluid erosion protection washer for rotating shaft in MWD tool

2009-02-26

2010-11-23

Fox, John (Department: 3753)

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

C277S411000

Reexamination Certificate

active

07839719

ABSTRACT:
A shaft protection washer to protect a rotating shaft in a “measurement while drilling” (MWD) tool. Use of the shaft protection washer renders the rotating shaft less susceptible to erosion from the drilling fluid flowing between the rotating component and the stationary component.

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Office Action mailed Mar. 25, 2008, for U.S. Appl. No. 11/442,344.
Final Office Action mailed Oct. 2, 2008, for U.S. Appl. No. 11/442,344.

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