Downhole uses of piezoelectric motors
First Claim
Patent Images
1. A formation fluid testing drawdown pump comprising:
- a piston;
a cylinder formed to receive said piston therein; and
a motive device operatively coupled to said piston, wherein said motive device is comprised of material responsive to electrical stimuli.
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Abstract
A sampling system used in collecting samples of connate fluid from within hydrocarbon bearing formations. The sampling system comprises a sonde disposed within a wellbore formed proximate to the formation of interest. The sonde includes a sample probe insertable into the formation and a drawdown pump in fluid communication with the sample probe. The drawdown pump is motivated by an associated electrically responsive material, where the electrically responsive material can be comprised of a piezoelectric material, a electroactive polymer, or some other electrically responsive material.
56 Citations
22 Claims
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1. A formation fluid testing drawdown pump comprising:
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a piston;
a cylinder formed to receive said piston therein; and
a motive device operatively coupled to said piston, wherein said motive device is comprised of material responsive to electrical stimuli. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of sampling connate fluid from within a subterranean formation comprising:
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inserting a drawdown pump within a wellbore adjacent the subterranean formation;
providing a fluid communicative path between said drawdown pump and the subterranean formation; and
operating said drawdown pump with a motive device, wherein said motive device is operatively coupled to said drawdown pump and comprises material responsive to electrical stimuli. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification