APPARATUS AND METHOD TO MEASURE FLUID RESISTIVITY
First Claim
1. An apparatus for measuring fluid resistivity, comprising:
- being adapted to be in fluid communication with formation fluids, wherein the flow line includes a first section comprising a first conductive area, a second section comprising a second conductive area, and an insulating section disposed between the first and the second section to prevent direct electrical communication between the first section and the second section, wherein the first conductive area and the second conductive area are configured to contact a fluid contained in the flow line such that, together with a conductive path disposed outside the flow line, a current return loop is formed;
a first toroid and a second toroid surrounding the flow line, wherein the first toroid is configured to induce an electrical current in the fluid in the flow line and the second toroid is configured to measure the electrical current induced in the fluid in the flow line; and
an electronic package to control functions of the first toroid and the second toroid.
1 Assignment
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Accused Products
Abstract
An apparatus for measuring fluid resistivity includes a flow line adapted to be in fluid communication with formation fluids, wherein the flow line includes a first section comprising a first conductive area, a second section comprising a second conductive area, and an insulating section disposed between the first section and the second section to prevent direct electrical communication between the first section and the second section; a first toroid and a second toroid surrounding the flow line around the first section and the second section, respectively, wherein the first toroid is configured to induce an electrical current in a fluid in the flow line and the second toroid is configured to measure the electrical current induced in the fluid in the flow line; and an electronic package to control functions of the first toroid and the second toroid.
31 Citations
16 Claims
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1. An apparatus for measuring fluid resistivity, comprising:
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being adapted to be in fluid communication with formation fluids, wherein the flow line includes a first section comprising a first conductive area, a second section comprising a second conductive area, and an insulating section disposed between the first and the second section to prevent direct electrical communication between the first section and the second section, wherein the first conductive area and the second conductive area are configured to contact a fluid contained in the flow line such that, together with a conductive path disposed outside the flow line, a current return loop is formed;
a first toroid and a second toroid surrounding the flow line, wherein the first toroid is configured to induce an electrical current in the fluid in the flow line and the second toroid is configured to measure the electrical current induced in the fluid in the flow line; and
an electronic package to control functions of the first toroid and the second toroid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for measuring fluid resistivity, comprising:
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a flow line adapted to be in fluid coxmmunication with formation fluids, wherein the flow line is made of an insulating material;
a first toroid and a second toroid surrounding the flow line and spaced apart along the flow line, wherein the first toroid is configured to induce an electrical current in a fluid contained in the flow line and the second toroid is configured to measure the electrical current induced in the fluid;
a metallic housing enclosing the first toroid, the second toroid, and a section of the flow line, wherein the metallic housing is configured to provide a return current path for the electrical current induced in the fluid; and
an electronic package to control functions of the first toroid and the second toroid. - View Dependent Claims (11, 12)
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13. A method for measuring resistivity of a formation fluid in a borehole, comprising:
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flowing the formation fluid through a flow line of a resistivity measurement apparatus, the flow line including a first section comprising a first conductive area, a second section comprising a second conductive area, and an insulating section between the first conductive section and the second conductive section such that the first conductive area and the second conductive area are disposed about and contact the formation fluid flowing in the flow line and are configured such that, together with a conductive path disposed outside the flow line, a current return loop is formed;
inducing an electrical current in the formation fluid in the flow line using a first toroid; and
measuring the electrical current induced in the formation fluid with a second toroid. - View Dependent Claims (14, 15, 16)
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Specification