System and method of protecting optical elements from down-hole

Details System and method of protecting optical elements from down-hole System and method of protecting optical elements from down-hole

1994-11-22

1995-08-08

Lobo, Ian J.

Acoustics

Geophysical or subsurface exploration

Well logging

348 85, G01V 140

Patent

active

054400813

ABSTRACT:
A surfactant composition is used to repel down-hole fluids such as crude oil and water to prevent remote viewing cameras from being obscured by such fluids, for extended periods of time. An effective amount of a down-hole fluid repelling surfactant, preferably in the form of a liquid solution, is applied to an exterior surface of an optical element of the viewing instrument, dried, and polished to prevent down-hole fluids from adhering to the surface of the optical element. A preferred liquid surfactant solution contains as an active ingredient an amount of tricresyl phosphate effective to repel down-hole fluids such as oil and water.

REFERENCES:
patent: 4171578 (1979-10-01), Meador
patent: 4532545 (1985-07-01), Hanson
patent: 5123492 (1992-06-01), Lizanec, Jr.
patent: 5140319 (1992-08-01), Riordan

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