Meinseth
Stein Eric Meinseth, Stavanger NO
Patent application number | Description | Published |
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20130220622 | ACTUATOR FOR DUAL DRILL STRING VALVE AND DRILL STRING VALVE CONFIGURATIONS THEREFOR - A dual drill string actuator includes a piston disposed in a housing. The housing is configured to sealingly couple at its longitudinal ends to an end of a nested dual drill string segment. An upper internal conduit is mounted in the housing proximate one longitudinal end thereof. A lower internal conduit is mounted in the housing proximate the other longitudinal end thereof. The piston is slidably, sealingly engaged between the upper and lower inner conduits and together define an internal fluid flow passage therethrough. The upper inner conduit, the piston and the lower inner conduit also define an external flow passage between respective exterior surfaces thereof and an interior of the housing such that application of fluid pressure to the external flow passage causes movement of the piston. | 08-29-2013 |
Stein Erik Meinseth, No NO
Patent application number | Description | Published |
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20120112115 | Sealing Arrangement For A Down Hole Valve - The present invention regards a sealing arrangement for a valve, comprising a valve element ( | 05-10-2012 |
Stein Erik Meinseth, Stavanger NO
Patent application number | Description | Published |
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20130220623 | ACTUATOR FOR DUAL DRILL STRING VALVE AND ROTARY DRILL STRING VALVE CONFIGURATION THEREFOR - A dual drill string valve includes an actuator including a piston disposed in a housing. The housing is configured to couple at its ends to an end of a nested dual drill string segment. An upper internal conduit is mounted in the housing proximate one longitudinal end thereof. A lower internal conduit is mounted in the housing proximate the other longitudinal end thereof. The piston is slidably, sealingly engaged between the upper and lower inner conduits and defines a fluid flow passage therethrough. The upper inner conduit, the piston and the lower inner conduit define another flow passage between respective exterior surfaces thereof and an interior of the housing such that application of fluid pressure to the external flow passage causes movement of the piston away from the upper inner conduit. A rotary valve is coupled to the actuator whereby longitudinal movement thereof rotates the rotary valve. | 08-29-2013 |