Downhole sampling tool and method for using same

Details Downhole sampling tool and method for using same Downhole sampling tool and method for using same

2008-01-31

2008-12-30

Dang, Hoang (Department: 3672)

Wells

Processes

Sampling well fluid

C073S152260, C166S100000

Reexamination Certificate

active

07469746

ABSTRACT:
Methods and apparatuses for sampling fluid from a subterranean formation penetrated by a wellbore are provided. The subterranean formation has clean formation fluid therein, and the wellbore has a contaminated fluid therein extending into an invaded zone about the wellbore. A shaft is extended from a housing and positioned in a perforation in a sidewall of the wellbore. At least one flowline extends through the shaft and into the housing. The flowline(s) are adapted to receive downhole fluids through the perforation. At least one fluid restrictor, such as a packer, injection fluid or flow inhibitor, may be used to isolate at least a portion of the perforation whereby contaminated fluid is prevented from entering the isolated portion of the perforation. At least one pump selectively draws fluid into the flowline(s).

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