Offshore HPU Installation EHA installed and plumbed two hydraulic power units on an offshore oil rig Four EHA repair technicians spent most of their 2015 summer down in Houston working on offshore oil rig as shown. IFP South sold two power units to the company. The first included two 50hp motors and a single 40hp motors while the second unit was equipped with a a 20hp diesel backup power unit. There was also a control console designed and built into it. EHA ran all the plumbing from the power unit to the control console and then to over 90 cylinders that were on the rig, most of which were Enerpac 10,000 psi lifting cylinders.