Patent ID: 11898437
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A method, comprising:
creating a chamber within an annulus between a wellbore casing and a drillpipe, wherein an upper boundary of the chamber comprises a seal and a lower boundary of the chamber comprises a liquid surface;
determining a volume of the chamber at a first time, wherein determining the volume of the chamber comprises:
measuring, using a pressure gauge, a first pressure within the chamber,
changing an amount of a gas in the chamber using a gas pump,
measuring, using the pressure gauge, a second pressure within the chamber,
determining a first volume of gas within the chamber based on the first and second pressure measurements and the change in the amount of gas, and

determining a first fluid level based on the first volume of the chamber.