GN designed balanced elliptical motion shale shaker is the most advanced type in the world, before we use Italy Oli vibration motor( short type), like the picture below. 
Now we had new design for the BEM shaker-use long vibration motor. See the picture left.
The Long Motor BEM shale shaker works well for high Viscosity oil based drilling mud.
Specification of GN Long Motor Shale Shaker
Shaker Screen Area:2.2㎡ with 3 Panel Screen.
Wedged type screen for fast removing
G force up to 7.5 which is adjustable
Handling capacity is up to 528 GPM,this 3 Shale Shaker is on a same skid for fast removement.