Bottoms-Up Mud Sample

Definition - What does Bottoms-Up Mud Sample mean?

A Bottoms-Up Mud Sample is a sample of mud which is present deep at the bottom of earth’s crust; it has stayed there due to the stable conditions of pressure, temperature and several other conditions. A Bottoms-Up Mud Sample is usually collected after the drillstring is pulled out of the hole or after the arrival of a formation fluid is assumed. The sample of mud is also brought out from wells due to the circulation of the drilling fluid.

Petropedia explains Bottoms-Up Mud Sample

A Bottoms-Up Mud Sample is a sample of mud brought up to the surface from the bottom of earth’s crust after pulling the drillstring or by circulating the drill fluid. The circulation could be started after a stagnant period while drilling. The mud undergoes downhole pressures, contamination and temperatures and is brought out as a Bottoms-Up Mud Sample. This sample is useful for the mud-engineers or mud-lodgers who try to figure out the nature of the mud and its mineral content. Mud-engineers prefer examining a Bottoms-Up Mud Sample rather than examining the full mud volume.

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