Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – By fluid pressure differential in conduit
Patent
1997-10-01
2000-09-12
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
By fluid pressure differential in conduit
B65H 5900
Patent
active
061165786
ABSTRACT:
The present invention describes a method and apparatus for inserting a cable, in a duct, tube, or other hollow, elongated structure which can be sealed at the point of insertion of the cable to create a pressure housing. The invention comprises positioning a tube in the well, positioning a source of cable adjacent the well, and inserting the cable through a pressure housing into the tubing by means of polymer foam mixture under pressure. A mechanical force may be employed on the fiber optic to overcome any resistance created by the lubrication fitting at the pressure housing. The foam is in the form of a concentrate, which, when mixed with a liquid source and air, expands significantly when injected into the capillary. Due to such expansion, the foam adheres to the surface of the cable, creating a viscous drag against the cable in the direction of pressure flow.
REFERENCES:
patent: 5156376 (1992-10-01), Spicer
patent: 5456450 (1995-10-01), Reeve et al.
patent: 5503370 (1996-04-01), Newman et al.
patent: 5732934 (1998-03-01), Sano et al.
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