Improved fluid recovery needed
The customer needed to recover more fluid
from cuttings and ensure longer screen life
while handling high flow rates on a jackup rig
offshore Abu Dhabi.
Multiple tests indicated better performance
The MD-2 dual-deck shaker was evaluated
using the following criteria: MOC percent,
handling capacity and solids discharge, and
Optimal shale shaker performance required for offshore drilling
An operator working offshore Abu Dhabi
sought a shaker that would reliably deliver low
MOC values and handle high flow volumes,
yet offer longer screen life. As a result,
M-I SWACO was asked to evaluate and deploy
the optimal technology.
MD-2 shaker selected based on
M-I SWACO deployed the MD-2 shaker.
The shaker is designed to augment the fluid
process capabilities and recover extra fluid yet
utilize a smaller footprint when compared to
Efficient shaker exceeded customer’s demands
A test was run for a length of 2,500 ft with a bit diameter of 12 1/4 in. MOC retort analyses were
performed daily. The total solids discard rate (TSDR) measurement was completed during regular
drilling to determine the maximum capacity of the MD-2 shaker. Full flow during regular drilling
was diverted to the first MD-2 shaker, and the collection trough was placed under the discard
end. Thirty seconds later, the trough was 75% full, and the sample was collected. The TSDR for
the first MD-2 shaker was 1.47 lbm/s [0.67 kg/s].
During drilling operations, two shakers were dressed using API 140 mesh composite screens.
The two shakers processed the entire flow rate of 900 galUS/min while the mud covered less
than 50% of the surface area. Only one screen required changeout during the operations. At full
flow, drilling continued at an ROP of 40–50 ft/h [12–15 m/h], and the two shakers maintained
MOC of between 26% and 40% by volume and 9% to 16% by weight with no overspill or runoff.