Formation sampling apparatus

Details Formation sampling apparatus Formation sampling apparatus

E - Fixed Constructions

21

B

166/5

E21B 49/02 (2006.01) E21B 49/10 (2006.01)

Patent

CA 1227418

ABSTRACT An apparatus and method for taking fluid samples from earth formations surrounding a borehole while minimizing the erosion of the formations which occurs during such sample-taking, in which a specialized tool is brought into communication with the desired formation and the fluid pressure which exists within the formation prior to taking a sample is used to restrict the flow of fluids into the tool. This restriction is however opposed with a pre-determined biasing force in combination with the dynamic fluid pressure during the sample-taking process. These opposing forces control the rate of flow of formation fluids into the tool in a manner diminishing the erosion which occurs.

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