Wellbore valve having linear magnetically geared valve actuator

Details Wellbore valve having linear magnetically geared valve actuator Wellbore valve having linear magnetically geared valve actuator

2007-06-14

2009-02-10

Thompson, Kenneth (Department: 3672)

Wells

With electrical means

Valve

C166S066500, C166S332100, C166S332800, C251S065000

Reexamination Certificate

active

07487829

ABSTRACT:
A wellbore valve includes a valve operator arranged to move axially along an interior of the wellbore, the valve operator arranged to operate a valve. A valve actuator is disposed proximate the valve operator. The valve actuator is arranged to move from one longitudinal position to another. A linear magnetic gear is coupled at an input element thereof to the valve actuator. The gear is coupled at an output element thereof to the valve operator such that motion of the valve actuator is transferred to the valve operator.

REFERENCES:
patent: 2536813 (1951-01-01), Jones et al.
patent: 2746395 (1956-05-01), Carpenter
patent: 6713944 (2004-03-01), Omata et al.
patent: 2003/0155131 (2003-08-01), Vick, Jr.
patent: 2008/0157014 (2008-07-01), Vick, Jr. et al.
patent: 436214 (1991-07-01), None
Atallah, K. et al., “A high-performance linear magnetic gear”, Journal of Applied Physics 97, 10N516 (2005).
Rizk, J. et al, “Analysis and design of magnetic torque couplers and gears” (publisher and date unknown).

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