Apparatus and method for obtaining formation fluid samples utilizing a sample clean-up device
AssigneeBaker Hughes Incorporated
InventorsWade Bullock, James T. Cernosek
Life of this patent
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Abstract
In one aspect, a method of obtaining a fluid from a formation is disclosed that in one embodiment may include: pumping fluid received by a first probe from the formation into the wellbore; pumping fluid received by a second probe from the formation into the wellbore; determining when the fluid received by one of the first and second probes is clean; and pumping the fluid received by the first probe into a sample chamber while collecting the formation fluid received by the second probe from the formation into a storage chamber having an internal pressure less than the pressure of the formation.
Claims11
A method of obtaining a sample of a fluid from a formation surrounding a wellbore, comprising:
- pumping formation fluid received by an inner probe from the formation into a sample chamber;
- collecting formation fluid received by an outer probe from the formation into a fluid collection chamber having an internal pressure less than the pressure of the formation;
- and
- controlling the internal pressure of the fluid collection chamber to draw the formation fluid into the fluid collection chamber by flowing a fluid under pressure from the fluid collection chamber into a force application device via a flow control device.
An apparatus for obtaining fluid from a formation, comprising:
- an inner probe and an outer probe;
- a pump configured to extract formation fluid from the formation via the inner probe;
- a fluid collection chamber of a sample clean-up unit configured to receive formation fluid from the outer probe due to a pressure differential between the formation and the fluid collection chamber;
- and
- a flow control device configured to control the pressure differential to receive the formation fluid into the fluid collection chamber by flowing a fluid under pressure from the fluid collection chamber to a force application device of the sample clean-up unit.
Dependencies are inferred from the claim text.