The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 2015
Filed:
Nov. 30, 2012
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventor:
William Leo Koederitz, Cedar Park, TX (US);
Assignee:
NATIONAL OILWELL, VARCO, L.P., Houston, TX (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/00 (2006.01); E21B 47/00 (2012.01); G01V 3/38 (2006.01); E21B 21/08 (2006.01);
U.S. Cl.
CPC ...
G01V 3/38 (2013.01); E21B 47/00 (2013.01); E21B 44/00 (2013.01); E21B 21/08 (2013.01);
Abstract
A method of monitoring a well for unwanted formation fluid influx is disclosed. Measurements of well outflow are acquired during a period in which drilling operations are performed for the well. Occurrences of stagnant flow events during the period are determined. An outflow signature is generated from the well outflow measurements for each stagnant flow event. The outflow signatures are displayed sequentially in time of occurrence. Each outflow signature is analyzed for an anomaly.