PG completes mud shaker tests

PG Flow Solutions (PG) rapidly mobilises and completes a comprehensive, reality-close, land-based mud shaker test programme for Statoil and Kvaerner at PG’s Sande site.

Statoil awarded Kvaerner the contract for a complete upgrade of the Njord A platform, which has served the Njord field on the Norwegian continental shelf since 1997. The contract includes a complete upgrade of platform hull and topside, thereby enabling Njord to produce oil and gas in decades to come.

As part of the topside upgrade, Statoil will require new mud shakers for future drilling operations from the platform. As subcontractor to main EPC contractor Kvaerner, PG Flow Solutions was last autumn chosen to compare the performance of two types of mud shakers with regards to critically important elements such as noise, vibrations and access/screen changing.

“The challenge was that noise data from field operations was not comparable for the respective shaker makes. Plus that comparable noise data was only available from dry run factory acceptance tests at the respective manufacturer’s workshops. Hence, Statoil and Kvaerner urgently needed to conduct an independent noise and vibration test, which we were asked to do,” says Kim-Ove Nyhuus Guttersrud, service engineer at PG Flow Solutions and manager of the tests.

A-week-and-a-half after receiving the purchase order from Kvaerner, PG Flow Solutions had created a dedicated, close-to-real-life test loop for the mud shakers at its facility at Sande in Vestfold, Norway.

The company’s PG MACS drill cutting system was set up to circulate mud from a tank placed at the bottom of a test pit at its test facility. The tank was set up with PG’s own hydraulic power pack, Submix agitators, monitoring system and local control cabinet. The shaker test frame was then placed on top of the test pit.

“Both shakers were subject to noise and vibration testing while running dry and when circulating mud of variable volume over the shaker screens. Specific mud was provided by Statoil’s partners to ensure reality being reflected to the greatest extent.

It is the first time that Statoil and Kvaerner had conducted a land-based test of such products,” adds Nyhuus Guttersrud.

Following two weeks of intensive testing, PG Flow Solutions provided a unique infrastructure for input to the summary and conclusion report, which included a recommendation of which of the shaker models will give the lowest noise level when installing four of them on the Njord A platform.

“In the run-up to and during the test period, PG clearly demonstrated our ability to turn around quickly and set up a large scale test in a very brief amount of time. The same type of test rig is also available to other oil companies and rig operators that wish to test mud shaker equipment,” concludes Nyhuus Guttersrud.

The next project will be to run similar tests for drill cuttings and abandonment fluids for major customers early in 2018, proving that PG’s team are able to solve challenging tasks together with the most demanding clients in the market place.