AUTOMATED FORMATION FLUID CLEAN-UP TO SAMPLING SWITCHOVER
First Claim
1. A downhole apparatus comprising:
- a carrier conveyable in a well borehole;
a fluid control device that urges a fluid into a port, the fluid containing a contaminant;
a first test device in communication with the fluid, the first test device generating a first signal indicative of a first fluid characteristic;
a second test device in communication with the fluid, the second test device generating a second signal indicative of a second fluid characteristic; and
a processing device that receives the first signal and the second signal, the processing device processing the first signal and the second signal to estimate a level of contamination in the fluid, the processing device generating a control signal when the estimated level of contamination meets a predetermined value.
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Accused Products
Abstract
Apparatus and method for downhole formation fluid sampling include conveying a carrier into a well borehole that traverses a subterranean formation of interest, the carrier having a port and placing the port in fluid communication with the subterranean formation of interest. The method includes urging a fluid into the port using a fluid control device, the fluid containing a formation fluid and a contaminant, generating a first signal indicative of a first fluid characteristic of the fluid using a first test device in communication with the fluid, and generating a second signal indicative of a second fluid characteristic of the fluid using a second test device in communication with the fluid. The first signal and the second signal are processed using a processing device to estimate a level of contamination in the fluid, and a control signal is generated when the estimated level of contamination meets a predetermined value, the control signal actuating the fluid control device to direct fluid having a level of contamination at about or below the predetermined value to a fluid sampling chamber carried by the carrier.
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Citations
27 Claims
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1. A downhole apparatus comprising:
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a carrier conveyable in a well borehole; a fluid control device that urges a fluid into a port, the fluid containing a contaminant; a first test device in communication with the fluid, the first test device generating a first signal indicative of a first fluid characteristic; a second test device in communication with the fluid, the second test device generating a second signal indicative of a second fluid characteristic; and a processing device that receives the first signal and the second signal, the processing device processing the first signal and the second signal to estimate a level of contamination in the fluid, the processing device generating a control signal when the estimated level of contamination meets a predetermined value.
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12. A method for estimating fluid contamination downhole comprising:
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conveying a carrier in a well borehole; urging a fluid into a port using a fluid control device, the fluid containing a contaminant; generating a first signal indicative of a first fluid characteristic using a first test device in communication with the fluid; generating a second signal indicative of a second fluid characteristic using a second test device in communication with the fluid; processing the first signal and the second signal using a processing device to estimate a level of contamination in the fluid; and generating a control signal when the estimated level of contamination meets a predetermined value.
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22. A downhole apparatus comprising:
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a carrier conveyable in a well borehole; a fluid control device that urges a fluid into a port, the fluid containing a contaminant; a test device in communication with the fluid, the test device generating a signal indicative of a fluid characteristic; a processing device that receives the signal, the processing device processing the signal to estimate a level of contamination in the fluid, the processing device generating a control signal when the estimated level of contamination meets a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 24, 25)
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23. A method for estimating fluid contamination downhole comprising:
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conveying a carrier in a well borehole; urging a fluid into a port using a fluid control device, the fluid containing a contaminant; generating a signal indicative of a fluid characteristic using a test device in communication with the fluid; processing the signal using a processing device to estimate a level of contamination in the fluid; and generating a control signal when the estimated level of contamination meets a predetermined value. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 26, 27)
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Specification