Hydraulic Power Unit (HPU)

The Hydraulic Power Unit (HPU) is a single skid mounted unit that supplies pressurized hydraulic fluid to various control system components for the safe and reliable operation of the BOP. The HPU is a demand based system (if running in auto mode) that will automatically provide and maintain the required system operating volume and pressure of five-thousand (5,000) psi.

The HPU is designed in compliance with the provisions of API 16D that provide for a combined system to supply a sufficient quantity of hydraulic fluid to charge the entire accumulator system from the pre-charged pressure to the maximum rated operating pressure within fifteen (15) minutes.

The main frame is fully seam welded for maximum durability and strength and comes equipped with four lift points (swivel rings) for safe handling. A stainless steel, sloped bottom drip pan with valved drains and flush mounted fiberglass grating are also provided to ensure a safe and uncluttered walkway.

In addition, the HPU is supplied with all required suction strainers, block-and-bleed valves, downstream check valves, relief valves, and pulsation dampeners to operate the unit. All main skid structural components are coated with a three part marine epoxy paint system for added harsh environment protection.


Hydraulic Power Unit Functions

  • Supplies pressurized hydraulic fluid to various control system components for the safe and reliable operation of the BOP
  • When in auto mode, monitors and charges the BOP Subsea Accumulators
  • Communicates with the control system and provides feedbacks on behalf of the optional Reservoir Mixing Unit (RMU)


Hydraulic Power Unit Options

  • Custom designs available to suit your specific needs
  • DNV and ABS certification available


Hydraulic Power Unit Features

  • Self contained, fully seam welded skid with accessible component design makes installation and maintenance fast and easy
  • Operates in manual or fully automatic modes for effortless control and operation
  • Manufactured, in-house, at our Houston, Texas Facility with the highest quality contemporary stainless steel valves and piping that resist corrosion and provide robust performance
  • Our systems meet and/or exceed API 16D requirements. ABS and DNV Certification is available, upon request
  • 7 days-a-week replacement parts customer support for “Rig-Down” situations


Technical Specifications

Overall Dimensions (typical): (L) 232 in x (W) 84 in x (H) 93.5 in (shackles removed)
Weight (Dry): 19,500 lbs.
Weight (with fluid): 20,000 lbs.
Temperature Range: -10oF to +140oF
Required Main Service Voltage: 3x 460 VAC, 3 Phase, 30 Amp
Required Fluid Service: Up to 75 gpm
Required Water Service: 90 psi @ 5 scfm
Max Throughput: 75 gpm @ 4,800 to 5,000 psi



Major System Components
(Vary per Customer Requirements and Options)

  • 3x 100hp AC Motors
  • Recirculation Pump
  • 3x 25 gpm pumps
  • Flow Control Valves
  • Motor starter panels
  • Fluid Level Sensors
  • Interface control panel
  • UV Filter Kit (optional)


We can schedule a meeting, presentation, facility tour or lunch-and-learn to show you what our BOP Control Systems and surface equipment can do for you, your customers, and your drilling rig.

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