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1. (WO2017035658) METHOD AND SYSTEM FOR DETECTING AT LEAST ONE OF AN INFLUX EVENT AND A LOSS EVENT DURING WELL DRILLING

Pub. No.:    WO/2017/035658    International Application No.:    PCT/CA2016/051040
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Sep 02 01:59:59 CEST 2016
IPC: E21B 21/08
E21B 44/00
E21B 47/10
Applicants: PASON SYSTEMS CORP.
Inventors: TORRIONE, Peter
MORTON, Kenneth
UNRAU, Sean
Title: METHOD AND SYSTEM FOR DETECTING AT LEAST ONE OF AN INFLUX EVENT AND A LOSS EVENT DURING WELL DRILLING
Abstract:
Methods, systems, and techniques for detecting at least one of an influx event and a loss event during well drilling involve using one or both of errors between 1) estimated and measured pit volume, and 2) estimated and measured flow out, to identify or determine whether the influx or loss event is occurring, or to sound some other type of related alert. These determinations may be performed in a computationally efficient manner, such as by using one or both of a time and depth sensitive regression.