Choke and kill system
AssigneeKinetic Pressure Control Ltd.
InventorsSteven Anthony Angstmann, Bobby James Gallagher
Life of this patent
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Abstract
A choke and kill system, and a method of adapting a low pressure drilling rig for use in a high pressure application are described. The system has a low pressure stack and a high pressure blowout preventer stack fluidly connected to the low pressure stack. A choke is fluidly connected to a low pressure choke line of the low pressure stack and is connected to a high pressure choke line of the high pressure blowout preventer stack. The choke is adapted to reduce the pressure from the high pressure choke line to the low pressure choke line.
Claims34
A choke and kill system for a deep water drilling rig, the choke and kill system comprising:
- a low pressure stack of the deep water drilling rig, the low pressure stack comprising pipe rams;
- a high pressure blowout preventer stack of the deep water drilling rig fluidly connected to the low pressure stack, the high pressure blowout preventer stack connected to a wellhead, the high pressure blowout preventer stack comprising components rated to a higher pressure than components of the low pressure stack;
- a choke fluidly connected to a low pressure choke line of the low pressure stack, the low pressure choke line connected to the low pressure stack below the pipe rams, the choke fluidly connected to a high pressure choke line of the high pressure blowout preventer stack, the high pressure choke line connected below the high pressure blowout preventer stack and above the wellhead, the high pressure choke line rated to a higher pressure than the low pressure choke line, the choke adapted to reduce the pressure from the high pressure choke line to the low pressure choke line.
A method for adapting a low pressure drilling rig for use in a high pressure application, the method comprising:
- connecting a high pressure blowout preventer stack to a low pressure stack of the low pressure drilling rig, the high pressure blowout preventer stack connected to a wellhead and rated to a higher pressure than the low pressure stack;
- fluidly connecting a choke to a low pressure choke line of the low pressure stack;
- and
- fluidly connecting the choke to a high pressure choke line of the high pressure blowout preventer stack, the high pressure choke line connected below the high pressure blowout preventer stack and above a wellhead, the high pressure choke line rated to a higher pressure than the low pressure choke line, wherein the choke is adapted to reduce the pressure from the high pressure choke line to the low pressure choke line.
Dependencies are inferred from the claim text.