Downhole Sampling Tool and Method for Using Same
First Claim
1. A downhole sampling tool positionable in a wellbore penetrating a subterranean formation, the subterranean formation having a formation fluid therein, the wellbore having a contaminated .fluid therein extending into an invaded zone about the wellbore, comprising:
- a housing;
a shaft extendable from the housing, the shaft positionable in a perforation penetrating the formation beyond the invaded zone about the wellbore;
a flowline extending through the shaft and into the housing, the flowline having an inlet for receiving downhole fluids through the perforation;
a first fluid restrictor positioned at least, in part outside of the perforation, the first fluid restrictor adapted to isolate the perforation from the wellbore fluids
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Accused Products
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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Citations
19 Claims
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1. A downhole sampling tool positionable in a wellbore penetrating a subterranean formation, the subterranean formation having a formation fluid therein, the wellbore having a contaminated .fluid therein extending into an invaded zone about the wellbore, comprising:
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a housing; a shaft extendable from the housing, the shaft positionable in a perforation penetrating the formation beyond the invaded zone about the wellbore; a flowline extending through the shaft and into the housing, the flowline having an inlet for receiving downhole fluids through the perforation; a first fluid restrictor positioned at least, in part outside of the perforation, the first fluid restrictor adapted to isolate the perforation from the wellbore fluids - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of sampling a fluid from a subterranean formation penetrated by a wellbore, the subterranean formation having a formation fluid therein, the wellbore having a contaminated fluid therein extending into an invaded zone about the wellbore, comprising:
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perforating a sidewall of the formation, the perforation penetrating the formation beyond the invaded zone about, the wellbore; inserting a shaft into a perforation in a sidewall of a wellbore, the shaft having a flowline extending through the shaft and into the housing, the flowline having an inlet for receiving downhole fluids through the perforation, positioning a first fluid restrictor at least in part outside of the perforation whereby the perforation is isolated from the wellbore fluids; drawing downhole fluid from the perforation into the downhole tool via the flowline, - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification