Wellhead junction box

Vent gas that migrates from downhole cables

Overview

Keep gas from reaching variable speed drives

Small amounts of gas can migrate up downhole cables used to power artificial lift equipment in oilfield applications. The wellhead junction box is used for electrical power surface connections, enabling the gas to be vented and preventing it from reaching variable speed drives (VSDs) or switchboards.

Custom-designed for on-land oilfield applications, the high-voltage wellhead junction box features six louvered vents, two drainholes, and three 5-kV insulator standoffs. Three-phase cables are connected at the three sets of 6 AWG to 350-kcmil [185-mm²] double-barrel lugs.

Features

How it works

Custom-designed for oilfield applications, the high-voltage wellhead junction box features six louvered vents, two drainholes, and three 5-kV insulator standoffs. Three-phase cables are connected at the three sets of 6 AWG to 350-kcmil [185-mm²] double-barrel lugs. This replaces junction boxes that do not have relevant ANSI, UL, and CSA safety certifications

Additional features

One 14 AWG through 2/0 AWG doublebarrel lug inside the enclosure for ground installation
One 4 AWG through 3/0 AWG singlebarrel lug outside the enclosure for ground installation
35-mm rail-mounted provision for anticondensation heater

Tech Specs

Wellhead Junction Box Standard Specifications
Enclosure type	High voltage, 5-kV AC
Ingress protection	CSA Type 3R*
Material	14-gauge [2-mm] cold-rolled steel
Ambient temperature rating	–40 to 70 degC [–40 to 158 degF]
Maximum terminations	Three conductors for three-phase cables
Earthing	Studs on enclosure and gland plates
Dimensions, width × height × depth	520 × 520 × 230 mm [20.5 × 20.5 × 9 in]
Area classification	Class 1, Division 2 outdoor nonhazardous