Formation tester with low flowline volume and method of use thereof
First Claim
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1. A downhole tool for use in a borehole comprising:
- a sampling port for receiving formation fluid from a formation about a borehole;
a flow line in fluid communication with the sampling port for transporting the formation fluid within the downhole tool;
a sample storage vessel in fluid communication with the sampling port, the sample storage vessel having a self-sealing valve;
a ram in contact with the sample storage vessel to move the sample storage vessel into a sampling position in contact with the flow line to open the self-sealing valve and establishing fluid communication with an interior of the sample storage vessel, and further wherein retracting the ram moves the sample storage vessel into a storage position that is not in fluid communication with the flow line, and further wherein the self-sealing valve automatically closes upon moving to the storage position.
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Abstract
A downhole tool for use in a well may comprise a vessel having a piston or a valve disposed therein and defining first and second volumes wherein the first volume is configured to receive formation fluid from an inlet port, and an actuator configured to extract formation fluid, the actuator being fluidly isolated from a fluid flow path extending between the inlet port and the first volume. The downhole tool may also comprise a flow-line configured to deliver formation fluid to the vessel, and an actuator configured to register an end of the flow-line with the inlet of the vessel.
43 Citations
21 Claims
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1. A downhole tool for use in a borehole comprising:
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a sampling port for receiving formation fluid from a formation about a borehole; a flow line in fluid communication with the sampling port for transporting the formation fluid within the downhole tool; a sample storage vessel in fluid communication with the sampling port, the sample storage vessel having a self-sealing valve; a ram in contact with the sample storage vessel to move the sample storage vessel into a sampling position in contact with the flow line to open the self-sealing valve and establishing fluid communication with an interior of the sample storage vessel, and further wherein retracting the ram moves the sample storage vessel into a storage position that is not in fluid communication with the flow line, and further wherein the self-sealing valve automatically closes upon moving to the storage position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for sampling a formation fluid in a borehole comprising:
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lowering a downhole tool in the borehole formation in a subterranean formation, the downhole tool having a revolving chambered cylinder storing a plurality of sample storage vessels therein, and the downhole tool having a piston within each of the plurality of sample storage vessels and movable within each sample storage vessel; sampling formation fluid about the borehole; drawing the formation fluid into the downhole tool through a flow line within the downhole tool and into a first one of the sample storage vessels rotating the revolving chambered cylinder to draw formation fluid into a second one of the sample storage vessels; and providing a ram in contact with one of the sample storage vessels to move the one of the sample storage vessels into a sampleing position in contact with the flow line and further wherein retracting the ram moves the one of the sample storage vessels into a storage position that is not in fluid communication with the flow line. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A downhole tool for use in a borehole comprising:
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a sampling port for receiving formation fluid from a formation about a borehole; a plurality of sample storage vessels rotatable within the downhole tool; and a ram for moving a first sample storage vessel from a storage position to a sampling position, the sampling port being in fluid communication with the first sample storage vessel at the sampling position; and further wherein retracting the ram moves the first sample storage vessel into the storage position that is not in fluid communication with the flow line. - View Dependent Claims (19, 20, 21)
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Specification