Natural gamma ray logging sub method and apparatus

Details Natural gamma ray logging sub method and apparatus Natural gamma ray logging sub method and apparatus

2007-05-15

2007-05-15

Porta, David (Department: 2884)

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

C250S269300

Reexamination Certificate

active

11524994

ABSTRACT:
A natural gamma tag marking materials for sub or permanent markers used in gamma logging operations, such natural gamma materials having a gamma count of between 200 and 1000 counts per second. The instant invention further discloses a typical Sub, for insertion in a drilling operation, utilizing natural gamma element compounds which are considered to be non-hazardous and effective as tag markers when used in wire-line logging operations.

REFERENCES:
patent: 2320643 (1943-06-01), Neufeld
patent: 2549109 (1951-04-01), McPhee
patent: 3835317 (1974-09-01), Vann
patent: 3962412 (1976-06-01), Wolfangel
patent: 4436996 (1984-03-01), Arnald et al.
patent: 5285065 (1994-02-01), Daigle et al.

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