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

Claim 10:
11. A method of detecting and mitigating well screen out at a fracturing well site, the method comprising:
operating one or more fracturing pumps to pump fluid and proppant to a wellhead at the fracturing well site; and
controlling a discharge rate of the one or more fracturing pumps by a controller, the controller is:
calculating a fluid pressure increase rate of the fluid pressure;
comparing the fluid pressure increase rate of the fluid pressure to a preselected increase rate; and
decreasing incrementally the discharge rate of the one or more fracturing pumps and a flow rate of the fluid when the fluid pressure increase rate is greater than the preselected increase rate and the fluid pressure is within a preselected percentage of a selected maximum wellhead pressure of the wellhead until the fluid pressure of the fluid supplied to the wellhead is stabilized, the decreasing incrementally a discharge rate of the one or more fracturing pumps and a flow rate of the fluid including stopping delivery of proppant to one or more blenders prior to decreasing the discharge rate of the one or more fracturing pumps.