Well bottom hole samples

Description:The following subsection describes a method suitable for most downhole production samples and many formation-test samples. Sample chambers containing mixing devices are to be preferred because they facilitate sample homogenization before transfer; where possible, duplicate samples should be taken from each depth sampled. Single phase sampling Downhole samples cool down as they are pulled out of the well. Once at the surface, the sample should immediately be transferred to containers through a flexible steel tube. Because valid transfer is crucial to sample quality, the preferred procedure is to maintain the fluid as a single-phase and transfer it in its entirety. Bottom hole samplers are specially designed devices containing one valve or two valves at their extreme ends.

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