Visual investigation method

Details Visual investigation method Visual investigation method

1979-03-08

1980-12-09

Corbin, John K.

Optics: measuring and testing

Inspection of flaws or impurities

Bore inspection

73151, 250256, G01N 2101

Patent

active

042381584

ABSTRACT:
The in situ visual inspection of down-hole equipment in drilling and exploration wells is effected by forming an optically clear region at the desired level and by using suitable video apparatus within the region so formed. This is achieved by introducing an optically clear liquid which is substantially immiscible with, and which has a density similar to that of the opaque liquid such as mud or crude oil which is present in the well. The density of the optically clear liquid can be controlled by blending two or more compatible components, e.g. as a liquid mixture or as a solution of a solid in a liquid.

REFERENCES:
patent: 2677996 (1954-05-01), Laval, Jr.
patent: 2953979 (1960-09-01), Rosene et al.
patent: 2982191 (1961-05-01), Laval, Jr.
patent: 3113455 (1963-10-01), Sloan et al.
patent: 3596582 (1971-08-01), Sayer

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