Formation tester with low flowline volume
AssigneeSchlumberger Technology Corporation
InventorsAnthony R.H. Goodwin, Julian J. Pop, Stephane Briquet, Ricardo Vasques, Alexander Zazovsky
Life of this patent
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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.
Claims21
A downhole tool for use in a borehole formed in a subterranean formation comprising:
- a formation fluid mobilizer configured to mobilize a formation fluid;
- a vessel comprising a piston slidably disposed therein and defining first and second volumes, wherein the first volume is configured to receive at least a portion of the mobilized formation fluid from an inlet port;
- an actuator operatively coupled to the piston, the actuator being fluidly isolated from a fluid flow path extending between the inlet port and the first volume;
- and
- a valve configured to capture the formation fluid in the first volume.
A method for obtaining a sample of formation fluid comprising:
- lowering a downhole tool in a borehole formed in a subterranean formation, the downhole tool comprising:
- a vessel comprising a piston slidably disposed therein and defining first and second volumes;
- an actuator operatively coupled to the piston, the actuator being fluidly isolated from a fluid flow path extending between an inlet port and the first volume;
- and
- a valve configured to capture the formation fluid in the first volume.
- mobilizing a formation fluid in the formation;
- operating the actuator to slide the piston in the vessel;
- receiving in the first volume at least a portion of the mobilized formation fluid from the inlet port;
- and
- actuating the valve to capture the formation fluid in the first volume.
A downhole tool for use in a borehole formed in a subterranean formation comprising:
- an inlet port configured to admit a formation fluid in the downhole tool;
- a vessel configured to receive the formation fluid, the vessel having a valve configured to selectively close an inlet of the vessel;
- a flow-line configured to deliver the formation fluid from the inlet port to the vessel;
- and
- an actuator configured to register an end of the flow-line with the inlet of the vessel.
A method for obtaining a sample of formation fluid comprising:
- lowering a downhole tool in a borehole formed in a subterranean formation, the downhole tool comprising:
- a flow-line extending from an inlet port;
- a first valve disposed on the flow-line and defining first and second volumes;
- a pumping mechanism operatively coupled to the second volume;
- and
- a second valve configured to capture the formation fluid in the first volume.
- mobilizing a formation fluid in the formation;
- flowing formation fluid in the flow-line using the pump;
- receiving in the first volume at least a portion of the mobilized formation fluid from the inlet port;
- and
- actuating the first and second valves to capture the formation fluid in the first volume.
Dependencies are inferred from the claim text.