Apparatus and method for obtaining formation fluid samples
AssigneeBaker Hughes Incorporated
InventorsDavid A. Hejl, Shawn Olsen
Life of this patent
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Abstract
In one aspect, an apparatus for obtaining a fluid from a formation is disclosed that in one embodiment may include a fluid extraction device having a first probe and a second probe independently extendable form a tool body, a first fluid line and an associated first filter in fluid communication with the first probe for receiving the fluid from the formation and a second fluid line and an associated second filter in fluid communication with the second probe for receiving the fluid from the formation, and a first fixed scraper that cleans the first filter when the first probe is retracted from an extended position and a second fixed scraper that cleans the second filter when the second probe is retracted from an extended position.
Claims21
An apparatus for obtaining a fluid from a formation, comprising:
- a fluid extraction device that includes:
- a first probe and a second probe extendable from a tool body;
- a first fluid line and an associated first filter in fluid communication with the first probe for receiving the fluid from the formation and a second fluid line and an associated second filter in fluid communication with the second probe for receiving the fluid from the formation;
- and
- a first fixed scraper that cleans the first filter when the first probe is retracted from an extended position and a second fixed scraper that cleans the second filter when the second probe is retracted from an extended position.
A method of obtaining a fluid from a formation, comprising:
- providing a tool that includes a first probe and a second probe independently extendable from a tool body, a first fluid line and an associated first filter in fluid communication with the first probe for receiving the fluid from the formation and a second fluid line and an associated second filter in fluid communication with the second probe for receiving the fluid from the formation, and a first fixed scraper that cleans the first filter when the first probe is retracted from an extended position and a second fixed scraper that cleans the second filter when the second probe is retracted from an extended position;
- conveying the tool in a wellbore;
- extending the first probe and the second probe to contact an inside wall of the wellbore;
- extracting fluid from the formation via the second probe and determining when such extracted fluid is substantially free of contamination;
- and
- extracting fluid from the formation via the first probe after determining the extracted fluid is substantially free of contamination and collecting such fluid in a chamber.
Dependencies are inferred from the claim text.