Wells – With electrical means
Patent
1996-02-16
1997-07-01
Dang, Hoang C.
Wells
With electrical means
439278, 439587, H01R 400
Patent
active
056427808
ABSTRACT:
A stand off for providing a fluid-tight seal for an electrical connection in a well between an electrical conductor extending from down hole of the well and a power source conductor extending from an above-ground power source is enclosed by and extends through and further into the well bore. The power source conductor extends down hole to a connector for connecting the power source conductor to the electrical conductor. The stand off includes a rigid tube adapted to extend through a wellhead barrier of the well and terminate at a lower end. A rubber boot surrounds the rigid tube. An electrical insulative tubular body has a hole forming a first inner surface surrounding the power source cable between the lower end of the rigid tube and the connector, the rubber boot surrounding the tubular body. A tubular extension is integrally formed at one end of the tubular body and has a second, larger hole coaxial with the first hole and forming a second inner surface. An internal surface is formed between the first and second inner surfaces, the lip surrounding a portion of the rigid tube adjacent the lower end and the internal shoulder engages the lower end of the rigid tube for preventing the rubber boot from extruding between the tubular body and the rigid tube when pressurized.
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Mark W. Earley et al., The National Electrical Code Handbook, Fifth Edition, pp. 686-689.
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