Force balanced dual valve systems for steering tool and methods of using the same
AssigneeBaker Hughes Oilfield Operations LLC
InventorsBastian SAUTHOFF, Thomas WETTMARSHAUSEN
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AssigneeBaker Hughes Oilfield Operations LLC
InventorsBastian SAUTHOFF, Thomas WETTMARSHAUSEN
Estimating the term…
A force balanced valve apparatus for downhole steering tools that includes a valve actuator (214), first and second valve bodies (218, 220), an inverse travel linkage (230), and a flow twisting section (208) for pressure balancing. The flow twisting section reorients fluid flow paths by approximately 180°from an uphole valve section (207) of the apparatus to a downhole steering pressure generation section (210). Hydraulic forces are balanced across the valve apparatus are balanced by force balancing pistons (222, 224) responsive to pressures in the steering pressure generation section. The force balanced valve apparatus may generate steering pressure differentials for directional drilling and mud pulse telemetry by modulating fluid flow.
A system to generate a differential pressure in a fluid passageway in a housing, the system comprising:
A method of generating a differential pressure in a fluid passageway in a housing, the method comprising:
Dependencies are inferred from the claim text.