MENCK’s MHU 750T and 800S Pile Driving Systems

MENCK Hydraulic Underwater Hammer MHU –S and –T series have played an essential role in the development and progression of offshore oil & gas explorations and developments from the early beginning.

MHU’s double acting hydraulic technology combined with the modular yet compact design delivers energy transfer efficiency of up to and above 95%, making the all MHU series of hammers the lightest and yet most powerful system for every pile configuration required.

Outer Diameter (OD): 1.1 m (42-in.) - 5.2 m (205-in.)

The MHU 800S hammers are directly adaptable to pile sizes ranging from 1.1 m OD (42-in.) to 5.2m OD (205-in.). In line with its integral design considerations, these hammers can be utilized for above water and shallow subsea operations in up to 300 m water depth. Once paired with MENCK’s deepwater girdle-type powerpack, the MENCK Hydraulic Deepwater Power Pack (MHP DWS), these hammers can support installation efforts in water depths down to 3,000 m (10,000-ft) effectively and efficiently. Notably, the integral part of the technology – the MHU hammer - is one and the same for every system and size.

Key features & Benefits

  •   Suits free-riding or leader-guided operations
  •   Meets specification to be operated off drilling vessels through moonpool
  •   Fits into tight spaces
  •   Plug-and-play setup using quick-connect couplings on hydraulic, hose and umbilical connections
  •   Highest net rnergy vs. system weight ratio in its class making it the lightest system on the market
  •   >95% net energy rransfer, infinitely adjustable between to the precise energy output required
  •   Can be mobilized globally and deployed to 3,000 m water depth
  •   Flexible adaptation concept for quick-reconfiguration of system to different pile diameters
  •   Single-lift deployment for operations
  •   Closed-loop hydraulic system, configurable using biodegradable oil
  •   Numerous safety systems to meet highest HSE standards and improve system lifetime
  •   Powered by MENCK's MHP power pack(s) of variable size
  •   Controlled through MENCK’s one-fits-all-hammers MHC 21 control system
  •   Supported by MENCK’s MWI combi winch Unit for ease of deployment and recovery
  •   Run by MENCK’s service technicians

Operational Data & Standard Configuration

  MHU 750T MHU 800S
Minimum Nominal Energy Output (10%)[kJ] 75 75
Nominal Maximum Energy Output | Surface & shallow water [kJ] 820 820
Nominal Maximum Energy Output | Deepwater @ 1,000 m WD [kJ] 750 750
Oil Flow Rate @ Max. Energy [ l/min ] 1600 1600
Ram Weight [ton] 45.4 45.4
Weight of Hammer incl. Ram [ton] 79.6 79.6


Anvil/Pile Sleeve Configuration
Range defines the Minimum and Maximum Pile Diameter
    42" - 84" 48" - 96"
  Length overall [m] 17.1 17.6
Total Weight, above water config. In air [ton] 114.6 120.9
Total Weight, above water config. submersed [ton] --- ---
Total Weight, submerged config. In air [ton] 139.0 139.9
Total Weight, submerged config. submersed [ton] 112 111
Total Weight deepwater config. In air [ton] --- 155.5
Total Weight deepwater config. submersed [ton] --- 106.4



For above water and shallow water operations

  • • MENCK’s Hydraulic Power Pack MHP 1600, any larger size or multiple smaller coupled together
  • • 2.0-in. ID Hydraulic Lines (3x HP, 3x LP), optional on MENCK’s designated Combi Winch unit MWI
  • • MENCK’s Hammer Control System MHC 21
  • • Suitable Stock of Spare Parts & MENCK’s Workshop Container


For deepwater operations

  • • MENCK’s Underwater Deepwater Power Pack MHP DWS 64”
  • • MENCK’s Deepwater Umbilical Winch Unit MWI DWS, with suitable length umbilical
  • • MENCK’s Deepwater Air Compressor unit MOC Air
  • • MENCK’s Hammer System Control Unit MHC 21 DWS
  • • MENCK’s Deepwater Power Container MOC DWS, with integrated control & monitoring cabin
  • • Suitable Stock of Spare Parts for all MENCK System Components & MENCK DWS Workshop Container


Supplementing Services

  • • Project Management and Engineering Services fully supplementing and integrating into Client's Project Team
  • • Highly-qualified and fully trained Offshore Service Technician team, fully supplementing and integrated into Client’s Offshore Team
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