Methods and apparatus for negating mineral scale buildup in...

Details Methods and apparatus for negating mineral scale buildup in... Methods and apparatus for negating mineral scale buildup in...

2011-03-01

2011-03-01

Neuder, William P (Department: 3672)

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

C166S386000, C166S332800

Reexamination Certificate

active

07896082

ABSTRACT:
Methods and devices for negating scale buildups on interior surfaces of a sliding sleeve valve housing above the flow tube. In some aspects, a wiper member provides additional clearance between the flow tube and housing to compensate for scale buildup. In other aspects, the interior surface of the valve housing is provided with a sleeve that is disposed between the interior surface of the valve housing and the general flowbore passing through the valve housing to protect the interior surface against scale buildup.

REFERENCES:
patent: 6273187 (2001-08-01), Voisin et al.
patent: 7347269 (2008-03-01), Layton
patent: 7543651 (2009-06-01), Smith et al.
patent: 2007/0251696 (2007-11-01), Parks
patent: 2010/0108320 (2010-05-01), Larnach

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