Method and system for neutron lifetime logging

Details Method and system for neutron lifetime logging Method and system for neutron lifetime logging

1985-06-03

1987-09-08

Church, Craig E.

Radiant energy

Coded record and readers; invisible radiant energy type

250269, 250268, G01V 510

Patent

active

046926178

ABSTRACT:
A borehole logging tool for neutron lifetime logging of subterranean formations surrounding a borehole includes a pulsed source of fast neutrons and a radiation detector for measuring neutrons returning to the borehole from the irradiated formations surrounding the borehole. The radiation detector system comprises a neutron absorbing and gamma ray radiating material which is moved by an articulating arm into contact with the borehole wall and is azimuthally oriented so that such neutron absorbing and gamma ray radiating material is firmly pressed against the formation. A shielding material minimizes absorption of neutrons from the borehole fluid. A gamma ray detector located in the main body of the logging tool detects gamma rays from the radiating material as a measure of the epithermal or thermal lifetime characteristic of the formation adjacent the borehole.

REFERENCES:
patent: 2996618 (1961-08-01), Goodman et al.
patent: 3240938 (1966-03-01), Hall, Jr.
patent: 3254221 (1966-05-01), Saurenman
patent: 3608373 (1971-09-01), Youmans
patent: 3688117 (1972-08-01), Givens
patent: 3869608 (1975-03-01), Scherbatsky
patent: 4078174 (1978-03-01), Goldman
patent: 4097737 (1978-06-01), Mills, Jr.

Affiliated with

Also associated with

Rating

Method and system for neutron lifetime logging does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for neutron lifetime logging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for neutron lifetime logging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2159845