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:
Jun. 21, 2005
Filed:
Mar. 21, 2003
Stefan Eric Edward Calvert, Clifton, GB;
Charles Alexander Pereira, Loughborough, GB;
James Roger Samworth, Ashby da la Zouch, GB;
Stefan Eric Edward Calvert, Clifton, GB;
Charles Alexander Pereira, Loughborough, GB;
James Roger Samworth, Ashby da la Zouch, GB;
Reeves Wireline Technologies Limited, Leicestershire, GB;
Abstract
A gas detection method includes carrying out respective neutron and density logs, using neutron and density detectors, along a length of well. The density log is corrected for the dimensions and properties of the well casing. The corrected density log is then combined with the neutron log to compensate for regions of artificially high density outside the casing. The compensated density log is continuously calibrated against the neutron log. The dynamically calibrated density and neutron logs are inspected for crossovers that signify the presence of gas in a formation.