Riser Cleaning and Preservation
NP Industrial Services have many years experience in maintaining and preserving Riser String Joints for rig operators both in the UK and overseas.
We have developed a system which can provide benefits to our clients financially by ensuring their Riser joints not in use are preserved to industry approved standard while held in storage.
It has become obvious that after the riser has been stored on the deck of the rig, on land or in a service yard for an extended period of time, the carbon steel lines to include the main tube start to corrode. There have been several incidents where the rigs have suffered extended downtime due to the internal corrosion of these lines. No one should assume that because the riser is coming from shore base, a service yard, new build facility or has been stored on the rig for an extended period of time, that the riser is ready to run. When it is known that section of riser has not been used for long periods of time, (no matter what the reason) the information should trigger an inspection of the internal areas of the carbon steel lines to insure they are ready for use. If they are found to be corroded, our procedure once followed, will have the riser ready for use whether it be run the next day or up to 24 months after.
Please contact our office to discuss how we can assist you with maintaining these valuable assets while not in use.