System and method for obtaining an effective bulk modulus of a managed pressure drilling system
AssigneeEquinor Energy AS
InventorsHenrik Manum, Åsmund Hjulstad
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Abstract
A method of obtaining an effective bulk modulus of a managed pressure drilling system is disclosed. The method includes generating a pressure wave in the managed pressure drilling system; measuring a time interval for the pressure wave to travel over a distance in the managed pressure drilling system; and calculating the effective bulk modulus of the managed pressure drilling system using the time interval and the distance.
Claims21
A method of obtaining an effective bulk modulus of a managed pressure drilling system, the method comprising:
- generating a pressure wave in the managed pressure drilling system;
- measuring a time interval for the pressure wave to travel over a distance in the managed pressure drilling system;
- and
- calculating the effective bulk modulus of the managed pressure drilling system using the time interval and the distance.
A method of obtaining an effective bulk modulus of a managed pressure drilling system with a first drilling fluid, the method comprising:
- obtaining a first effective bulk modulus;
- measuring a material bulk modulus of the first drilling fluid in the managed pressure drilling system;
- calculating a portion of the first effective bulk modulus not originating from the material bulk modulus of the first drilling fluid;
- changing the first drilling fluid in the managed pressure drilling system, wherein a material bulk modulus of a second drilling fluid is known or measured;
- and
- calculating a second effective bulk modulus of the managed pressure drilling system using the portion of the first effective bulk modulus not originating from the material bulk modulus of the first drilling fluid and the material bulk modulus of the second drilling fluid.
A managed pressure drilling system comprising:
- one or more sensors configured to measure a time interval for a pressure wave to travel over a distance in the managed pressure drilling system;
- and
- a processor configured to obtain an effective bulk modulus of the managed pressure drilling system using the time interval and the distance.
Dependencies are inferred from the claim text.