Case Study Mirage machines

VESSEL NOZZLE WELD PROFILES

willhartshorn Case Studies, Linear Milling Leave a Comment

REQUIREMENT: Large 5m diameter vessels with heavy schedule 120mm plate thickness pipe required holes and weld preparations to be made for the nozzles. Normally, a weld prep would be flame cut and then hand ground to the required angle or profile. SOLUTION: Mirage developed a system to mechanically cut the weld profile on the vessel. For the weld prep, the …

Case Study Mirage machines

TURBINE CASING REFURBISHMENT

willhartshorn Case Studies, Line Boring, Linear Milling Leave a Comment

Above: The boring machine used for machining the steam sealing faces assembled in one half of the turbine casing. Above: Mounting a Gantry Mill onto the casing -to enable split lines to be machined. REQUIREMENT 1: Develop a product to machine the steam seal faces on turbine casings. SOLUTION: Mirage developed a product to enabled the steam sealing faces of …

Case Study Mirage machines

TIDAL FIN REMOVAL

willhartshorn Case Studies, Linear Milling, Tidal Fin, Tidal Fin Removal (Wave Power) Leave a Comment

REQUIREMENTS: – Structural plates required removal from tidal turbine monopoles. – Diving time severely restricted to 20 minutes due to tidal direction change and ‘Neap Tide’. SOLUTION: – Plates (1.8m x 150mm x 30mm) removed using a slitting saw. Remaining material removed using face milling. – Quick release tooling used to allow fast project completion. OUTCOME: All machining operations were …

Case Study Mirage machines

SUBSEA WINDOW MACHINING

willhartshorn Case Studies, Linear Milling, Subsea Leave a Comment

REQUIREMENTS: A 26-1/2” conductor required a 1.3 x 0.45m window machining with 50mm radii 9m from the sea bed for a mud dump vent clamp to be fitted. Cold cutting was specified due to the 26-1/2” conductor housing 13-3/8” casing and a power line that could not be damaged during cutting. SOLUTION: Mirage Gantry (GM2000) and Milling Rail (MR1500) were …

Case Study Mirage machines

SEAM WELD AND DOUBLER PLATE REMOVAL

willhartshorn Case Studies, Linear Milling Leave a Comment

REQUIREMENTS: – Remove a seam weld from 30” pipeline over 3m length. – Remove anode doubler plates for relocation at 90m water depth. LOCATION: North Sea SOLUTION: – Cold cutting to prevent cutting into the parent pipeline. – Use of Mirage gantry MR1000SS with pipe chain clamping system, fixed feed, and depth stops. – Workshop trials carried out on a …

Case Study Mirage machines

HYDRO PLANT: STAY VANE MACHINING

willhartshorn Case Studies, Linear Milling Leave a Comment

The 3 axis milling machine in use. REQUIREMENTS The customer wanted to improve the water flow within a Francis Turbine, which required the machining of stay vane surfaces. SOLUTION: Use a Mirage 3 axis milling machine with various sized milling rails. OUTCOME: Improved the flow of water, which resulted in a 3% increase in efficiency. A Francis Turbine

Case Study Mirage machines

PLATFORM LEG CRACK TERMINATION

willhartshorn Case Studies, Linear Milling, Platform Leg Crack Termination Leave a Comment

Workshop trail. REQUIREMENTS: Cracking discovered in the main caisson around a vent exhaust duct on the platform leg. The requirement was to machine an elliptical hole into a 5m diameter platform leg. LOCATION: Siri Platform, Denmark SOLUTION: – Use the Mirage 3 axis gantry milling machine. – Workshop trials carried out in advance OUTCOME: All machining operations were completed first …

Case Study Mirage machines

WELD SEAM REMOVAL

willhartshorn Case Studies, Linear Milling Leave a Comment

REQUIREMENTS Removal of a longitudinal weld seam to allow fitting of a ‘Morgrip’ connector. LOCATION Apache North Sea, Forties Delta. SOLUTION: – Use of the Mirage MR1500SS milling rail – Workshop trials carried out in advance. OUTCOME: Successful machining allowed fitting of the ‘Morgrip’ mechanical connector. Workshop trail. / Subsea cutting operation.

Case Study Mirage machines

I-BEAM END FACE MILLING

willhartshorn Case Studies, I-Beam End Face Milling, Linear Milling Leave a Comment

The milling head and the end face of the I-beam REQUIREMENTS: Cementation Skanska, an internationally recognised specialist piling and ground engineering subcontractor, needed an efficient solution to machine the end face of 10 metre length I-beams used on a construction project. Outsourcing the machining of these large items would be time consuming and expensive, so the company decided to procure …