Formation evaluation system and method
First Claim
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1. A downhole tool, comprising:
- a probe comprising;
a first inlet having an elongated front cross-sectional shape; and
a second inlet surrounding the first inlet;
a first flow line in fluid communication with the first inlet;
a second flow line in fluid communication with the second inlet;
at least one pump configured to draw fluid from a subterranean formation through the first and second inlets into the first and second flow lines, respectively;
an optical fluid analyzer proximate the first flow line for measuring optical density of fluid in the first flow line; and
a sample chamber selectively connectable to the first inlet through at least the first flow line;
wherein;
the first flow line comprises a first portion and a second portion;
the second flow line comprises a first portion and a second portion;
the downhole tool further comprises a crossover selectively positionable in first and second positions;
the first crossover position fluidly connects the first portion of the first flow line to the second portion of the first flow line and the first portion of the second flow line to the second portion of the second flow line; and
the second crossover position fluidly connects the first portion of the first flow line to the second portion of the second flow line and the first portion of the second flow line to the second portion of the first flow line.
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Abstract
A downhole tool comprising a probe, wherein the probe comprises: a first inlet having an elongated cross-sectional shape, and a second inlet surrounding the first inlet. The downhole tool further comprises at least one pump configured to draw fluid from a subterranean formation through the first and second inlets.
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Citations
29 Claims
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1. A downhole tool, comprising:
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a probe comprising; a first inlet having an elongated front cross-sectional shape; and a second inlet surrounding the first inlet; a first flow line in fluid communication with the first inlet; a second flow line in fluid communication with the second inlet; at least one pump configured to draw fluid from a subterranean formation through the first and second inlets into the first and second flow lines, respectively; an optical fluid analyzer proximate the first flow line for measuring optical density of fluid in the first flow line; and a sample chamber selectively connectable to the first inlet through at least the first flow line; wherein; the first flow line comprises a first portion and a second portion; the second flow line comprises a first portion and a second portion; the downhole tool further comprises a crossover selectively positionable in first and second positions; the first crossover position fluidly connects the first portion of the first flow line to the second portion of the first flow line and the first portion of the second flow line to the second portion of the second flow line; and the second crossover position fluidly connects the first portion of the first flow line to the second portion of the second flow line and the first portion of the second flow line to the second portion of the first flow line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of sampling fluid from a subterranean formation, comprising:
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positioning a downhole tool in a wellbore adjacent the subterranean formation, the downhole tool comprising; a probe comprising; a first inlet having an elongated front cross-sectional shape; and a second inlet surrounding the first inlet; a first flow line in fluid communication with the first inlet; a second flow line in fluid communication with the second inlet; at least one pump configured to draw fluid from the subterranean formation through the first and second inlets into the first and second flow lines, respectively; an optical fluid analyzer proximate the first flow line for measuring optical density of fluid in the first flow line; and a sample chamber selectively connectable to the first inlet through at least the first flow line; positioning the probe in fluid communication with the subterranean formation; operating the at least one pump to draw fluid from the subterranean formation through the first and second inlets into the first and second flow lines, respectively, including past the optical fluid analyzer; monitoring a parameter of formation fluid drawn through the first inlet using the optical fluid analyzer; and capturing a sample in the sample chamber; wherein; the first flow line comprises a first portion and a second portion; the second flow line comprises a first portion and a second portion; the downhole tool further comprises a crossover selectively positionable in first and second positions; the first crossover position fluidly connects the first portion of the first flow line to the second portion of the first flow line and the first portion of the second flow line to the second portion of the second flow line; the second crossover position fluidly connects the first portion of the first flow line to the second portion of the second flow line and the first portion of the second flow line to the second portion of the first flow line; and the method further comprises moving the crossover from one of the first and second positions to the other of the first and second positions. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification