February 27 2015

With reliable performance and good price, GN Solids Control Decanter Centrifuge is becoming more and more popular in worldwide market. The advantage is also very obvious when compared with USA/Europe brand centrifuge. Recently, our after sales team just came back from GSF-135 America Transocean Offshore Rig and take back valuable jobsite data. The customer uses our VFD decanter centrifuge to cut down mud weight.

There are two sets decanter centrifuge on the offshore rig. One centrifuge is from Baker Hughes Drilling Fluids Environmental Services, the other one is from our buyer, which is local professional solids control & drilling cuttings treatment service provider. Sometimes, the offshore rig uses this two sets centrifuge alternatively ;one is in use and the other one as backup. Sometimes, they use the two centrifuge together to work more fast.

GN Solids Control centrifuge working on Transocean rig

When we do after sales service, we are faced with some challenges.
1) Because of the squeezed space on offshore rig, the feeding pump is much lower than the centrifuge, with at least over 10 to 15meters height difference.
2) The feeding pipe from screw pump to VFD centrifuge is extremely tortuous, some parts are steel pipe and some parts are rubber ones.
3) There is some deposit heavy mud in the tortuous feeding pipe between feeding pump to centrifuge, which made the feeding almost block.

All above points require very big pressure & big feeding rate to push away or push up the heavy mud and make the feeding smoothly. However, because of the jobsite layout, the bypass of centrifuge is not used at that time and the centrifuge trip off because of the overloading. We have to stop and study the jobsite and decide to install a long hose from bypass back to shale shaker and feeding centrifuge with big capacity & bypass fully opened. After that, the centrifuge & feeding pump is working well now.

GN Centrifuge working on offshore rig

Centrifuge operation is relatively complex compared with other solids control equipment, like shale shaker, desander, desilter, mud cleaner. Variable speed decanter centrifuge with Positive pressurized control panel require professional engineer with many years centrifuge operation experience & jobsite layout experience. For the new companies which just start their own solids control service business, welcome you to contact GN Solids Control and get more professional centrifuge operation knowledge & precautions.