Case Studies

A dive into some of our latest case studies.

MintMech Iron Roughneck

Bespoke Equipment Supply

Iron Roughnecks

We were approached for the design, build and commission of two bespoke iron roughnecks to promote operational safety and efficiency onboard two offshore vessels.

Specialist handling equipment, we designed remotely-operated iron roughnecks to safely connect and disconnect segments of pipe on geotechnical offshore drilling rigs. Improving safety, efficiency and productivity on board two offshore vessels, they were designed to remove the need for manual handling on offshore drilling rigs – alleviating the human operation of chains or tongs and limiting the need for personnel on operating decks.

Engineered in accordance with DNV and built to exacting specifications, our specialist iron roughnecks were custom-made to enhance the functionality of existing designs and reduce costs. Meeting exacting project and vessel-specific requirements, they accommodate the unique structural differences and height constraints of each derrick, and also come with simple-to-use control systems with visual indicators for smooth, remote operation.

Key features:

  • Can torque against the power swivel (bit breaker)
  • Full safety interlocking without a PLC
  • Compact design to suit single and twin mast geotech rigs
  • Pedestal mounted controls and custom driller cabin control
  • Calibrated adjustable torque setting
  • Adjustable cylinders to clamp drill sections and cylinders to control vertical position


Orsted Artificial Nesting Structure | Red7Marine | MintMech


Artificial Nesting Structures

We supported the installation of the UK’s first ever nearshore artificial nesting structures for the offshore wind industry. Installed along the East Coast of England in the North Sea, these three nesting structures were erected to support vulnerable seabird species, the black-legged kittiwake, as part of an ecological compensation scheme for the Hornsea 3 offshore wind farm.

The first of their kind in the UK, the structures play an important role in supporting and researching vulnerable seabird species, whilst simultaneously supporting the generation of clean, wind-powered electricity through the Hornsea 3 offshore wind farm. The wind farm, when completed, will be the largest of its kind in the world.

Supporting Red7Marine, we designed the bespoke piling gate used on the 65 tonne 8m x 6m high artificial avian nesting structures, including:

  • Pile gate vessel interface design
  • Pile & transition piece rollover frame design & supply
  • Sea fastening design & supply
  • Transfer ladder design & vessel interface design
  • Grout seal design
Kiel Canal, Rendsburg | Red7Marine | MintMech


Temporary Works Grillage

As part of our international turnkey packages, we were involved in the onsite installation of a temporary works grillage in Rendsburg, Germany, to support pile installation works. Working with Combifloat Systems B.V. and Red7Marine, this collaboration involved the design and commission of temporary works to support the construction of a new road bridge across the Kiel Canal.

Fusing maritime history and complex human engineering, the 1,500m long by 42m high bridge carries the A7 motorway east of Rendsburg in Schleswig-Holstein. Working alongside Combifloat Systems B.V. and Red7Marine, our engineers developed the structural design of a grillage platform to maximise the capacity of a C7 cantilevered pontoon. This was to support the operation of a 100t tracked crane and a 30t VRM2000 casing oscillator, enabling the successful drilling and installation of piling work.

Delivering specialist turnkey packages, we provided:

  • Vessel structure and system analysis
  • C7 bull rail design
  • Removable cantilever fabrication design
  • Additional structure required to withstand loads generated by VRM2000 <230t
  • Structure to accommodate torque reaction of VRM2000 on deck
  • Structure to allow +/- 250mm positioning tolerance
  • Structure to ensure HS8100 track levels and maximum track pressure requirements are accommodated
  • Safe access design
Portland Harbour Pile Gate Installation | Red7Marine | MintMech

Portland Harbour

Pile Gates

Supporting Red7Marine, we designed two bespoke pile gates and JUB interfacing cantilevers for the construction of a new deep-water berth, operational in April 2023, at Portland Harbour. Reshaping the harbour, the development provides a new berth with a deeper and extended berthing pocket and approach channel to allow larger vessels to use the port.

Red7Marine required a multi-function pile gate design to aid the installation of a 400m king and sheet pile combi-wall structure. Two bespoke piling gates incorporating a number of novel features were designed by our engineers to minimise crane lifts and maximise safety and productivity to install multiple piles within tolerance. This included:

  • A twin-level structure to restrain the pile at two separate levels
  • A means of mechanically adjusting the top of king pile plan position and adjusting about the vertical z-axis of the pile gate
  • A common design gate to mechanically and structurally interface with JUBs
  • Separate cantilever shelf supports
  • A dummy pile stub to mimic the reference pile
  • The capacity to install three further king piles without moving either the gate or the JUB location
  • A means within the gate assembly to relatively orientate clutches
  • The capacity to allow a hydraulic hammer to pass clearly down through the gate
  • Operator interface controls
  • Manufacturing and fabrication support
  • Transport and logistics support


Image Credits: Red7Marine