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:
Nov. 29, 2016
Filed:
Sep. 27, 2013
Applicant:
Managed Pressure Operations Pte. Ltd., Singapore, SG;
Inventors:
Christian Leuchtenberg, Singapore, SG;
Pat Savage, Diamond Valley, AU;
Assignee:
MANAGED PRESSURE OPERATIONS PTE. LTD., Singapore, SG;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/12 (2006.01); E21B 21/08 (2006.01); E21B 21/00 (2006.01);
U.S. Cl.
CPC ...
E21B 21/001 (2013.01); E21B 21/08 (2013.01);
Abstract
A method of drilling a subterranean wellbore using a drill string including the steps of estimating or determining a reduced static density of a drilling fluid based on the equivalent circulating density of the drilling fluid in a section of the wellbore, providing a drilling fluid having substantially that reduced static density, introducing the drilling fluid having said reduced static density into the wellbore, and removing the drilling fluid from the wellbore via a return line.