ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,951, issued on Dec. 30, was assigned to Equinor Energy AS (Stavanger, Norway).

"Method and system for monitoring influx and loss events in a wellbore" was invented by Espen Hauge (Trondheim, Norway), John-Morten Godhavn (Trondheim, Norway) and Steinar Elgsaeter (Trondheim, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of monitoring for influx and/or loss events in a wellbore are disclosed. One method comprises: receiving a measurement relating to fluid entering or leaving the wellbore, wherein the measurement is selected from flow out rate and active volume; and comparing the measurement with an expected value for the measurement to ...