Patent ID: 11891861
Assignee: ENHANCED DRILLING AS
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 7:
8. A method of measuring changes in liquid volume in a well extending from a bottom of a body of water, the method comprising:
providing a riser having a return outlet to be coupled to a return pump, the return pump being adapted to pump fluid from the riser to above a surface of the body of water;
positioning a sealing element in the riser above the return outlet;
providing a bypass around the sealing element;
operating in a closed mode where the sealing element and the bypass are essentially closed to prevent flow therethrough;
switching to an open mode by opening the bypass to allow flow between the riser below the sealing element and the riser above the sealing element;
essentially stopping circulation of liquid in the well;
measuring a level of liquid in the riser over a period of time; and
determining changes in volume of liquid in the well based on the level measurements.