Pulse height analyzer for spectroscopy thermal multigate decay well logging system

Patent · Tue Oct 08 00:00:00 EDT 1991

OSTI ID:5605758

Bridges, J R

This paper describes improvement in a downhole logging tool in a sonde for making measurements of nuclear events occasioned by logging formations adjacent the well borehole wherein the nuclear events have variable frequency and amplitude and such nuclear events are measured by a measuring means which forms a measured signal, data conversion. It comprises: an input circuit for receiving the measured signal which represents the nuclear events, the input circuit including; amplifier means connected to the measured signal for forming an amplified output signal; base line restoring circuit means connected to the amplifier means for obtaining a regulated baseline value above which amplification by the amplifier means occurs; an A/D converter having an analog input connected to the amplifier means for receiving the amplified signal therefrom.

• Assignee: Halliburton Logging Services, Inc., Houston, TX (United States)
• Patent Number(s): US 5055675; A
• Application Number: PPN: US 7-535614
• OSTI ID: 5605758
• Resource Relation: Patent File Date: 8 Jun 1990
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
07 ISOTOPES AND RADIATION SOURCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
BOREHOLES
GAMMA SPECTRA
WELL LOGGING
NUCLEAR REACTION ANALYZERS
ANALOG-TO-DIGITAL CONVERTERS
DATA PROCESSING
NEUTRON SPECTRA
PULSE AMPLIFIERS
WELL LOGGING EQUIPMENT
AMPLIFIERS
CAVITIES
ELECTRONIC EQUIPMENT
EQUIPMENT
MEASURING INSTRUMENTS
PROCESSING
SPECTRA
020200* - Petroleum- Reserves
Geology
& Exploration
070204 - Radiation Sources- Industrial Uses
Radiometric
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
440400 - Well Logging Instrumentation