Hydraulic power unit (HPU)

Company / operator legend practice (API 6A, API 521, API 537) / PIP PIC001 / ISO 1219-1

Drawn as

A dash-dot package with an oil reservoir (open-top tank), a pump with a motor, and an accumulator (a capsule split by a line), with hydraulic supply and return lines leaving.

Meaning

Wellhead HPU supplying hydraulic pressure to the SSVs, SCSSVs and wing valves through the wellhead control panel. Becomes hydraulic-power-unit.

Variants

Accumulators alone (ISO 1219) are a capsule with a horizontal dividing line