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. 24, 1986
Filed:
Feb. 24, 1983
Eric C Hopkinson, Houston, TX (US);
Donald W Oliver, Houston, TX (US);
Dresser Industries, Inc., Dallas, TX (US);
Abstract
In a neutron induced gamma ray well logging instrument, a neutron generator is pulsed at a preselected clock frequency. Each neutron burst produces inelastic scattering gamma rays and capture gamma rays. Inelastic scattering gamma rays are detected using a bismuth germanate scintillator during a first time interval coinciding with the neutron source being on. Capture gamma rays are detected by bismuth germanate scintillator during a second interval subsequent to the termination of each neutron burst. The detected pulses are converted into electrical pulses by a photomultiplier. The electrical pulses are coupled into processing circuitry. The use of address decoders, subtractors and ratio circuits enables measurements of the characteristic full-energy photopeaks of selected elements within the formations.