Patent ID: 11939854
Assignee: BJ ENERGY SOLUTIONS, LLC
Field: Civil engineering (Other fields)
Classification: CPC E  G | IPC E  G

Claim 5:
6. A method of detecting and mitigating well screen out at a fracturing well site, the method comprising:
operating one or more pumps to pump fluid and proppant to a wellhead at the fracturing well site;
sensing a fluid pressure of the fluid supplied to the wellhead with one or more sensors;
measuring a fluid pressure of the fluid supplied to the wellhead by the one or more sensors at a location of one or more of:
(a) adjacent an output of the one or more fracturing pumps, or
(b) at the wellhead, the one or more sensors each configured to measure a fluid pressure of the fluid provided to the wellhead;
and

in response to:
(i) a fluid pressure increase rate of the fluid supplied to the wellhead being greater than a preselected increase rate, and
(ii) the fluid pressure of the fluid supplied to the wellhead being greater than a preselected percentage of a selected maximum wellhead pressure:
decreasing incrementally, by a controller, a discharge rate of the one or more fracturing pumps and a flow rate of the fluid until the fluid pressure is stabilized.