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:
Dec. 11, 2007
Filed:
May. 05, 2006
Applicant:
Mark W. Hutchinson, Marlow, Bucks SL7 1NX, GB;
Inventor:
Mark W. Hutchinson, Marlow, Bucks SL7 1NX, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 47/04 (2006.01); E21B 47/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for determining a depth of a wellbore includes determining change in a suspended weight of a drill string from a first time to a second time. A change in axial position of the upper portion of the drill string is then determined between the first time and the second time. An expected amount of drill string compression related to the change in suspended weight for movement of a lower portion of the drill string between the first time and the second time is corrected. A position of the lower portion of the drill string is calculated from the change in axial position and the corrected amount of drill string compression.