Rotating fluid measurement device and method
First Claim
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1. A method of measuring a conductive fluid flow, the method comprising:
- traversing a casing with a tool, the tool comprising a tool body and a quadrilateral arm assembly attached to the tool body, the arm assembly having a sensor pad comprising an electromagnetic sensor, wherein a sensor pad long axis is parallel to a tool body long axis, and wherein the quadrilateral arm assembly has a first rotatable joint adjacent the tool body and forming a first inner acute angle, a second rotatable joint disposed adjacent and the sensor opposite the first joint and forming a second inner acute angle, a third rotatable joint adjacent the tool body and forming a first inner obtuse angle, and a fourth rotatable joint disposed adjacent the sensor pad and opposite the third joint and forming a second inner obtuse angle;
azimuthally rotating the sensor pad along an inner circumference of the casing; and
measuring a speed and direction of radial conductive fluid flow through a wall of the casing with an electromagnetic sensor disposed in the sensor pad.
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Abstract
Fluid flow measurement device and method. In one embodiment, a tool comprises a rotating arm with a sensor pad to measure fluid flow into or out of the casing wall. The arm maintains the sensor pad in close proximity to the casing inner wall. The tool diameter is variable to allow the tool to traverse variable diameter casings and pass obstacles. The sensor pad comprises flow channels to direct the flow of fluid by electromagnetic sensors configured to detect conductive fluid flow.
70 Citations
30 Claims
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1. A method of measuring a conductive fluid flow, the method comprising:
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traversing a casing with a tool, the tool comprising a tool body and a quadrilateral arm assembly attached to the tool body, the arm assembly having a sensor pad comprising an electromagnetic sensor, wherein a sensor pad long axis is parallel to a tool body long axis, and wherein the quadrilateral arm assembly has a first rotatable joint adjacent the tool body and forming a first inner acute angle, a second rotatable joint disposed adjacent and the sensor opposite the first joint and forming a second inner acute angle, a third rotatable joint adjacent the tool body and forming a first inner obtuse angle, and a fourth rotatable joint disposed adjacent the sensor pad and opposite the third joint and forming a second inner obtuse angle; azimuthally rotating the sensor pad along an inner circumference of the casing; and measuring a speed and direction of radial conductive fluid flow through a wall of the casing with an electromagnetic sensor disposed in the sensor pad. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for borehole logging comprising:
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traversing a borehole with a tool having a long axis, the tool comprising a first stationary tool segment, a rotatable tool segment having a first end rotatably coupled to the first stationary tool segment, a sensor pad having a pad long axis parallel to the tool long axis, and an arm assembly coupling the sensor pad to the rotatable tool segment, wherein the arm assembly is pivotably attached to the rotatable tool segment with a pivot axis of the arm assembly that is orthogonal to the long axis of the tool; azimuthally rotating the rotatable tool segment around the long axis of the tool with respect to the first stationary tool segment to move the sensor pad along an inner wall of the borehole; moving the sensor pad radially inward toward or outward from the rotatable tool segment when the arm assembly is pivoted on the pivot axis; and electromagnetically sensing radial conductive fluid flow through the inner wall of the borehole with the sensor pad. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method for borehole logging comprising:
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traversing a borehole with a tool, the tool comprising a tool body having a long axis, a sensor pad having a pad long axis parallel to the tool body long axis, a first arm having a first end pivotably coupled to the tool body and a second end coupled to the sensor pad, and a second arm having a first end pivotably coupled to the tool body and a second end coupled to the sensor pad, wherein pivot axes of the ends of the arms are orthogonal to the long axis of the tool body; azimuthally rotating the tool around the long axis of the tool to move the sensor pad along an inner wall of the borehole; moving the sensor pad radially inward toward or outward from the tool body when the arms are pivoted on their pivot axes, while maintaining a first vertical angle between the first arm and the tool body at a substantially same magnitude and direction as a second vertical angle between the second arm and the tool body; and electromagnetically sensing radial conductive fluid flow through the inner wall of the borehole with the sensor pad. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification