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:
Jan. 15, 1985
Filed:
Aug. 23, 1982
Applicant:
Inventors:
John D Jeter, Iowa Park, TX (US);
Henry More, Carmichael, CA (US);
Assignee:
Exploration Logging, Inc., Sacramento, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ; E21B / ; E21B / ;
U.S. Cl.
CPC ...
324347 ; 73152 ; 175 40 ; 175321 ; 324356 ; 324369 ;
Abstract
A replaceable insulating sleeve is disposed around the lower end of a drill string used in drilling a well. The sleeve is restrained from rotating relative to the drill string, but can be released and quickly slipped off the drill string in the field to permit rapid replacement if damaged, or if alternate equipment is required. The sleeve carries sensing means for measuring a characteristic of formations penetrated by the well.