Fluid resistivity measurement tool
AssigneeSchlumberger Technology Corporation
InventorsAlbert Hoefel, Kent D. Harms, Michael J. Stucker
Life of this patent
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Abstract
A downhole tool configured for conveyance within a borehole extending into a subterranean formation, wherein the downhole tool comprises a sensor assembly comprising a housing, a cap coupled to an end of the housing, a flow-line tube disposed within the housing and configured to receive fluid from the formation, a first winding disposed within the housing and configured to induce an electrical current in the fluid, and a second winding disposed within the housing and configured to detect the electrical current induced in the fluid by the first winding.
Claims18
An apparatus, comprising:
- a downhole tool configured for conveyance within a borehole extending into a subterranean formation, wherein the downhole tool comprises a sensor assembly comprising:
- a housing;
- a cap removably coupled to an end of the housing;
- a flow-line tube disposed within the housing and configured to receive fluid from the formation or borehole;
- a first winding disposed within the housing and configured to induce an electrical current in the fluid;
- and
- a second winding disposed within the housing and configured to detect the electrical current induced in the fluid by the first winding;
- a first chassis comprising a first flow-line extending therethrough;
- and
- a second chassis coupled to the first chassis and comprising a second flow-line
- extending therethrough, wherein the housing is disposed between the first and second chassis, and wherein the flow-line tube fluidly couples the first and second flow-lines.
A method, comprising:
- conveying a downhole tool within a borehole extending into a subterranean formation, wherein the downhole tool comprises a sensor assembly comprising:
- a housing;
- a cap removably coupled to an end of the housing;
- a flow-line tube disposed within the housing;
- a first winding disposed within the housing adjacent the flow-line tube;
- and
- a second winding disposed within the housing adjacent the flow-line tube;
- drawing fluid from the formation or borehole into the downhole tool and through the flow-line tube;
- inducing an electrical current in the fluid within the flow-line tube;
- detecting the electrical current induced in the fluid by the first winding;
- and
- detecting an electrical leakage from the flow-line tube with a detector electrically coupled to the flow-line tube.
Dependencies are inferred from the claim text.