Conductive fluid logging sensor and method
AssigneeREM Scientific Enterprises, Inc.
InventorRobert E. Maute
Life of this patent
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Abstract
In a borehole logging tool, the flow of conductive fluid into or out of a wellbore at the wellbore wall is detected and measured with a sensor loop proximate the borehole inner wall. The sensor loop includes a series of contiguous sensors that act as electromagnetic flowmeters and provide fluid measurements covering the entire circumference of the sensor loop. The sensor loop includes an elastic element that forces the sensor loop outward to maintain pressure along the sensor loop circumference against the interior borehole wall. The sensor loop is designed to lie at a non-perpendicular angle to the wellbore axis, and mechanical arms press the top and bottom of the loop against the borehole inner wall.
Claims33
A logging tool for a borehole, the borehole having an interior wall, the tool comprising:
- a tool body adapted to be inserted into the borehole;
- and
- an electromagnetic radial sensing device coupled to the tool body, the radial sensing device adapted to detect radial flow of conductive fluid entering or leaving the borehole interior wall, the radial sensing device being adapted to detect the conductive fluid flow adjacent the borehole interior wall.
A method of measuring radial fluid flow in a borehole having an interior wall, the method comprising:
- traversing the borehole with a tool body having an electromagnetic sensor loop attached thereto;
- and measuring a radial flow velocity of conductive fluid entering or leaving the borehole interior wall, wherein the measuring is performed adjacent the borehole interior wall.
A method of measuring radial fluid flow in a borehole having an interior wall, the method comprising:
- traversing the borehole with a tool body having an electromagnetic sensor loop attached thereto;
- and detecting a radial flow of conductive fluid entering or leaving the borehole interior wall, wherein the detecting is performed adjacent the borehole interior wall.
Dependencies are inferred from the claim text.