公开(公告)号：US11781418B2

公开(公告)日：2023-10-10

申请号：US16951835

申请日：2020-11-18

Applicant: CONOCOPHILLIPS COMPANY

Inventor： Bjoernar Hoeie ,  Tore Morten Hiim

IPC: E21B47/007 ,  E21B47/117 ,  E21B21/08

CPC classification number: E21B47/007 ,  E21B21/08 ,  E21B47/117

Abstract: The invention relates to the monitoring of pressure in production tubing (3) and/or annuli (7, 9) of an oil or gas well. Patterns of pressure in tubing and/or annuli may be indicative of a fault or a condition which requires attention. Patterns may also be recognized that, e.g. based in rates of change, may indicate that a fault may be going to occur in the future. Pressure differences between tubing and annuli or between different annuli may be monitored in the same way.