.~.~ Retaining fluid or taking separate fluid sample
DEFINITION
Classification: 175/59
(under subclass 58) Processes comprising the step of (1) maintaining the natural fluid content of the earth sample or (2) taking a discrete sample of the fluid occurring in the borehole or its surrounding earth formations.
(1) Note. Processes including the step of taking a single sample comprising a solid and liquid, as for example a sample of drill cuttings and drilling fluid, are not included in this subclass unless there is some additional step of
maintaining the natural fluid content of the solid earth portion of the sample.
SEE OR SEARCH THIS CLASS, SUBCLASS:
232+, for apparatus in which a subsurface sample is delivered to the surface at the same pressure existing at the bottom of the borehole.
SEE OR SEARCH CLASS
166, Wells, 264, for processes of sampling well fluids, per se.
