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:
Sep. 21, 1982
Filed:
Sep. 02, 1980
Applicant:
Inventor:
Harold E Peelman, Houston, TX (US);
Assignee:
Halliburton Company, Duncan, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
250270 ;
Abstract
Methods and apparatus are provided for determining the thermal neutron lifetime of earth formations in the vicinity of a well borehole. The borehole environs are irradiated with pulses of fast neutrons. Between neutron pulses capture gamma rays are detected in at least six, non-overlapping, sequential time intervals and count rate signals representative thereof are generated. Comparisons of the six count rate signals are made to determine which ones have been affected by a borehole component. Only those count rate signals not affected by the borehole component are used to determine the thermal neutron lifetime by a least-squares fitting technique.