Land Rig Hydraulic Power Unit

Applications

• Land rig drilling

Benefits

• Improved safety
• Low maintenance costs
• Increased operational efficiency
• Remote operation and monitoring
• Flexibility and robustness

Features

• Design based on extensive use of hard piping
• Considerably reduced number of connection points
• Interlocks and warning systems with user-intuitive operator interface
• Maintenance access at defined points
• Oil level switch for protecting hydraulic power unit (HPU) pumps
• Pressure-relief valve on each pump
• Emergency stop button
• Hydraulic soft-start design
• Main electric motors connected to soft starters located on the HPU skid
• High number of filters and circulation pump unit for maintaining good oil quality
• Hydraulic filters equipped with both visual and electric clogging indicators
• Diesel engine and main pumps mounted on vibration dampeners
• Hydraulic circuit for heating the oil in the reservoir
• Remote or local operation
• Built-in self-diagnostic functions

The land rig hydraulic power unit (HPU) delivers steady hydraulic pressure and flow with a design that facilitates streamlined operation and simplified maintenance.

Robust engineering for reliable service

For a long service life in challenging conditions, the HPU is fabricated with field-proven components and materials. It also includes an onboard oil cooling system, which consists of an air oil cooler, local pressure gauges, and a bypass valve to protect the oil cooler from pressure peaks. The HPU can be operated even if the rig power generator, main electric motor, or pump unit should fail.

Simplified display and control

The HPU is engineered with a remote supply pressure readout, integrated inspection hatch, and local reservoir level and temperature readout, making it easy for rig personnel to determine and evaluate critical drilling parameters.

Ruggedized design for rough handling

The HPU is mounted on a skid to accommodate turbulent rig moves. It can be handled by overhead crane, forklift, or oilfield skidding or pulling. The HPU can be transported with hydraulic oil and diesel fuel in the reservoirs.

Scope of supply

• Base frame made with corrosion-protected carbon steel and equipped with mounting brackets (for diesel engine pump unit, electric motor and pump units, air oil cooler, reservoirs, manifolds, and starter cabinet); platforms; two forklift pockets; antispill arrangement with two drain nozzles; two electric earthing bosses; and brackets for external hydraulic and electric connections
• Two hydraulic main pumps and circulation motor mounted via flexible coupling on vertically positioned electric motor
• Diesel engine pump unit for use during rig-up (when the HPU is not connected to a rig power generator)
• Framework-mounted roof with two light fixtures located above important access points and four lifting lugs to enable lifting the entire HPU, even with fluid in both reservoirs
• Stainless steel starter cabinet containing all necessary components for local or remote operation
• Local operator panel that enables start and stop of electrical motor pump units, emergency stop, and indication of various parameter values
• Final documentation
• Recommended spare parts list

Options

• Hazardous area suitability
• First-time oil fill
• Fire and gas system
• Upgrade with a third main pump unit for increased total flow rate or for increased redundancy
• Automatic control system for sequential-pump start and stop
• Automatic control system for distribution of running hours between the pumps