Wells – Processes – With indicating – testing – measuring or locating
Patent
1976-02-06
1977-02-08
Novosad, Stephen J.
Wells
Processes
With indicating, testing, measuring or locating
166169, 175309, E21B 4700
Patent
active
040067777
ABSTRACT:
A carrier and contained well instrument which are light enough to float in the fluid in a well are forced downwardly in the well to a predetermined test zone by downward movement of the fluid. After performance of a testing operation by the instrument, the buoyant carrier and instrument are permitted to float upwardly within the fluid to the surface of the earth for retrieval.
REFERENCES:
patent: 1812943 (1931-07-01), Granger
patent: 2190901 (1940-02-01), Wilcox et al.
patent: 2776564 (1957-01-01), Montgomery et al.
patent: 2927641 (1960-03-01), Buck
patent: 2970547 (1961-02-01), McMurry
Green William P.
Novosad Stephen J.
Suchfield George A.
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