Methods and devices for filling tanks with no backflow from the borehole exit
AssigneeBaker Hughes Incorporated
InventorsAtes C. Dumlupinar, Quming Zhou
Life of this patent
Estimating the term…
Abstract
A method for sampling fluid from a subsurface formation includes retrieving fluids from the formation using a plurality of pumps. The method also includes the steps of controlling a flow of the retrieved fluids using at least a first valve and a second valve and estimating an operating parameter of at least one pump of the plurality of pumps. The method further includes the step of controlling the first valve and the second valve using the estimated operating parameter to initiate a fluid sampling event.
Claims10
A method of sampling fluid from a subsurface formation, comprising:
- retrieving fluids from the formation using a plurality of pumps;
- controlling a flow of the retrieved fluids using at least a first valve and a second valve;
- estimating an operating parameter of at least one pump of the plurality of pumps;
- wherein the operating parameter relates to one of:
- (i) a stroke of the piston, (ii) a position of the piston, and (iii) a time to complete a stroke of the piston;
- controlling the first valve and the second valve using the estimated operating parameter to initiate a fluid sampling event;
- communicating with a fluid container via the first valve;
- communicating with a borehole via the second valve.
An apparatus for sampling fluid from a subsurface formation, comprising:
- a plurality of pumps configured to retrieve fluids from the formation;
- at least a first valve and a second valve configured to control a flow of the retrieved fluids;
- a controller configured to control the first valve and the second valve using an estimated operating parameter of at least one pump of the plurality of pumps to initiate a fluid sampling event;
- wherein the operating parameter relates to one of:
- (i) a stroke of the piston, (ii) a position of the piston, and (iii) a time to complete a stroke of the piston;
- a fluid container in fluid communication with the first valve;
- and
- wherein the second valve is configured to control fluid communication with a borehole.
Dependencies are inferred from the claim text.