High pressure, high temperature standoff for electrical connector in an underground well

Abstract

A standoff 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 wellbore. The power source conductor extends down hole to a connector for connecting the power source conductor to the electrical conductor. The standoff 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 sleeve is placed 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 and evenly distributing the compressive force on the end of the standoff. On the other end of the standoff, a washer sits atop the electrical connector and supports the insulation.