 DENVER--BUSINESS WIRE--Liberty Oilfield Services Inc. NYSE: LBRT; Liberty announced today that its team has collectively achieved the milestone of 24-hours of continuous plug and perf pumping time for Kaiser-Francis Oil Company in the Permian Basin. By delivering a full 1,440 minutes of pumping time with zero non-productive time, Liberty crews were able to attain the premier goal of Libertys Operation 1440. Operation 1440 was formed at Liberty in early 2021 to improve throughput on locat 