Fluid flow measuring device and method of manufacturing thereof
AssigneeREM Scientific Enterprises, Inc.
InventorRobert Maute
Life of this patent
Estimating the term…
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.
Claims20
An inspection tool for a casing, the casing having an interior wall, the tool comprising:
- a tool body shaped to fit within the casing;
- an arm rotatably coupled to the tool body, the arm having a near end proximate the tool body and a distal end opposite the near end, wherein the distal end of the arm is rotatable azimuthally along and adjacent to the casing interior wall;
- and
- an electromagnetic sensing device mounted on the distal end of the arm, wherein the electromagnetic sensing device is oriented to sense a radial flow of conductive fluid through the casing interior wall, while being relatively insensitive to radial nonconductive fluid flow and to fluid flow in a central region of the casing.
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;
- an arm rotatably coupled to the tool body, the arm having a near end proximate the tool body and a distal end opposite the near end;
- and
- an electromagnetic flowmeter mounted on the distal end of the arm, wherein the electromagnetic flowmeter is rotatable azimuthally along and adjacent to the borehole interior wall, and wherein the electromagnetic flowmeter is oriented to sense a radial flow of conductive fluid through the borehole interior wall, with relatively little sensitivity to radial nonconductive fluid flow and to fluid flow in a central region of the borehole.
A method of measuring radial fluid flow in a casing having an interior wall, the method comprising:
- traversing the casing with a tool body having a rotatable arm with an electromagnetic sensing device attached to a distal end thereof;
- azimuthally rotating the arm as the tool body axially traverses the casing, thereby causing the electromagnetic sensing device to sweep around the casing interior wall;
- and
- detecting a radial flow of conductive fluid through the casing interior wall with the electromagnetic sensing device.
Dependencies are inferred from the claim text.