CPC E21B 43/267 (2013.01) [E21B 21/08 (2013.01); E21B 43/12 (2013.01); E21B 43/26 (2013.01); E21B 43/2607 (2020.05); G08B 21/182 (2013.01)] | 22 Claims |
1. 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 to a wellhead at the fracturing well site;
sensing a fluid pressure of the fluid when supplied to the wellhead with one or more sensors;
measuring the fluid pressure of the fluid supplied 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 when supplied to the wellhead being greater than a preselected percentage of a selected maximum wellhead pressure:
decreasing incrementally, by a controller in communication with the one or more fracturing pumps and one or more blenders, a discharge rate of the one or more fracturing pumps and a flow rate of the fluid, the decreasing incrementally a discharge rate of the one or more fracturing pumps and a flow rate of the fluid including stopping delivery of the fluid prior to decreasing the discharge rate of the one or more fracturing pumps.
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