Engineering for Subsea Projects

• Subsea Pipeline



Walmsleys designed and built the world's first Cable Application Machine to manufacture electrically trace heated pipe-in-pipe for Subsea applications. This machine applies multiple Fibre Optic and Trace Heating Cable around the inner pipe, before it is inserted into the outer pipe. This specially designed machine has been installed in the UK, and will be used initially to make products used in the North Sea.

ETH-PIP aims to enhance production operability of subsea pipelines that are liable to become blocked by the formation of hydrates or wax. Successful application of this technology will reduce capital and operating costs for fields with challenging flow assurance conditions. This innovative pipeline technology, is designed for both shallow and deepwater environments.




• Subsea Cable



Walmsleys designed and built a Cable Winding Machine for the manufacture of subsea umbilical cables. These umbilical cable making machines are capable of winding multiple electrical, optical and data cables together with steel tubes and thermoplastic hose for air, gas etc into one large umbilical cable. Umbilicals form the critical link between a subsea production arrangement and a remote facility providing control, power, communications and chemical services. Applications include production control, chemical injection, subsea pumping and processing, gas lift and underground gas storage among others.
Example of umbilical Umbilical functions may include:

• Steel tube and/or thermoplastic hose fluid conduits to provide hydraulic control and chemical injection service
• Low voltage electrical power and communications provided via signal cables, fibre optic cables and power conductors
• Medium voltage electrical power conductors Chemical injection lines for use in corrosion inhibition and prevention of wax and scale build-up
• Large bore centre tubes for bulk chemical injection or gas lift functions