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:
Apr. 18, 1978
Filed:
Oct. 28, 1976
Applicant:
Inventors:
Ronald E Turcotte, West Redding, CT (US);
Robert H Hunt-Grubbe, Devizes, EN;
Assignee:
Schlumberger Technology Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; G21G / ;
U.S. Cl.
CPC ...
250252 ; 250493 ; 250494 ; 250496 ;
Abstract
A radioactivity logging tool including a gamma ray detector is field calibrated with the help of a sleeve that has a radioactive material distributed therein and is clamped about the tool so as to completely surround the detector. The radioactive material is peferably uranium 238. It can be either distributed uniformly inside the sleeve or take the form of wires which extend along generatrices or circumferences of the sleeve.