Communications: electrical – Wellbore telemetering or control – Selective control of subsurface equipment
Reexamination Certificate
2006-12-05
2006-12-05
Hofsass, Jeffery (Department: 2612)
Communications: electrical
Wellbore telemetering or control
Selective control of subsurface equipment
C166S053000, C166S336000, C166S250150
Reexamination Certificate
active
07145471
ABSTRACT:
A sequential hydraulic well control system provides actuator selection and operation utilizing pressure applied to hydraulic lines in a sequence. In a disclosed embodiment, an actuation control device of a well control system includes multiple pistons, at least one of which is included in a latch for selectively permitting and preventing displacement of another of the pistons. When one of the pistons displaces in response to pressure applied sequentially to hydraulic inputs of the control device, an associated actuator is placed in fluid communication with the inputs.
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Office Action for Norwegian Patent Appl. No. 20023960 dated Aug. 22, 2005.
Pending U.S. Appl. No. 09/503,276, filed, Feb. 14, 2000.
Purkis Daniel G.
Reid Michael A.
Hofsass Jeffery
Jenkins Kimberly
Smith Martin R.
Smith IP Services P.C.
WellDynamics Inc.
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