Vorrichtung zur Probenentnahme von Flüssigkeiten aus Bohrungen.

摘要

A well fluid sampling apparatus for sampling fluids from a formation reservoir in a well, comprises a body portion (132,183,196,332) defining a large sampling chamber (194) therein and at least one sampler module (214) disposed in the sampling chamber. The sampler module is adapted for separately entrapping a volume of fluid as the sampling chamber fills. A sliding sampler valve (360) is moved to open a sampler port (434) allowing formation fluid to enter the sampling chamber (194). The sampler module has a metering piston (278) therein which automatically closes the module after a predetermined volume of fluid has entered a sampler module chamber (272) defined in the sampler module. The metering can be accomplished by a chamber (272) filled with a viscous liquid which must be discharged through a small orifice (304) as the piston moves in response to fluid pressure in the sampling chamber. The viscous fluid is discharged into an air chamber (314). Testing gauges may be positioned adjacent each of the sampler modules to measure and record fluid pressure and temperature as desired.