Atmosphere control for photographic pipeline inspection

Details Atmosphere control for photographic pipeline inspection Atmosphere control for photographic pipeline inspection

1982-01-05

1984-02-28

Griffin, Donald A.

Recorders

Combined with external recorder operating means

Well logging

354 63, G03B 3700, G01D 938

Patent

active

044344279

ABSTRACT:
A device is disclosed which includes a camera pig and a tow pig having an articulated connection therebetween to permit movement through pipe bends. The tow pig includes a syphon device for projecting liquids upwardly and forwardly and also includes a compressor and a desiccant chamber for drying of gas which is injected into a camera space between cups of the camera pig. A flow path is provided through the camera pig which by-passes the camera space, for maintaining a passive environment therein.

REFERENCES:
patent: 2737864 (1956-03-01), Gutterman et al.
patent: 2909975 (1959-10-01), Ulrich
patent: 2932243 (1960-04-01), Woronoff
patent: 2971259 (1961-02-01), Hahnau et al.
patent: 3096698 (1963-07-01), Stoutenburg
patent: 3667359 (1972-06-01), Watts et al.
patent: 3828356 (1974-08-01), Wiers
patent: 4249810 (1981-02-01), O'Connor et al.
patent: 4372658 (1983-02-01), O'Connor et al.
Jan. 1981, Pipeline Industry Camera Pig: New Development for In-service Line Inspection.
Mar. 1981, Pipeline & Gas Journal `Camera Pig` Checks Weldments, Internal Coating Offshore.
May 1981, Quality Pig in a Pipeline.

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