IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0947402
(2010-11-16)
|
등록번호 |
US-8230732
(2012-07-31)
|
발명자
/ 주소 |
|
출원인 / 주소 |
- REM Scientific Enterprises, Inc.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
30 |
초록
▼
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 meas
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.
대표청구항
▼
1. A method of measuring radial fluid flow in a casing having an interior wall, the method comprising: inserting a tool body into the casing, wherein the tool body comprises an arm with an electromagnetic sensing device attached to a distal end thereof, and wherein an electrical line is coupled to t
1. A method of measuring radial fluid flow in a casing having an interior wall, the method comprising: inserting a tool body into the casing, wherein the tool body comprises an arm with an electromagnetic sensing device attached to a distal end thereof, and wherein an electrical line is coupled to the tool body;transmitting electrical power to the tool body via the electrical line;axially traversing the casing with the tool body;azimuthally rotating the arm to sweep the electromagnetic sensing device around the casing interior wall;sensing for a radial flow of conductive fluid through the casing interior wall with the electromagnetic sensing device; andreceiving and recording information regarding the radial flow of conductive fluid, from the electromagnetic sensing device via the electrical line. 2. The method of claim 1, wherein the electromagnetic sensing device comprises a pair of electrodes, and wherein the sensing for the radial flow of conductive fluid comprises: generating a magnetic field perpendicular to an imaginary line between the pair of electrodes, and perpendicular to the radial flow of conductive fluid; andmeasuring a voltage difference between the pair of electrodes. 3. The method of claim 2, wherein the voltage difference is proportional to a velocity of the radial flow of the conductive fluid proximate the pair of electrodes. 4. The method of claim 1, wherein the azimuthally rotating the arm further comprises maintaining the electromagnetic sensing device in contact with the casing interior wall. 5. The method of claim 1, wherein the sensing for the radial flow of conductive fluid comprises measuring with the electromagnetic sensing device within a distance of 0.75″ from the casing interior wall. 6. The method of claim 1, wherein the inserting the tool body into the casing further comprises: compressing the distal end of the arm toward a center axis of the tool body;inserting the tool body into a tubing disposed within the casing; andexpanding the distal end of the arm away from the center axis of the tool body as the tool body exits the tubing. 7. The method of claim 1, wherein the sensing for the radial flow of conductive fluid further comprises sensing as the tool body traverses the casing away from an insertion point. 8. The method of claim 1, wherein the sensing for the radial flow of conductive fluid further comprises sensing as the tool body traverses the casing toward an insertion point. 9. A method of measuring radial fluid flow in a casing having an interior wall, the method comprising: inserting a logging tool into the casing, wherein an electrical line is coupled to the logging tool;transmitting electrical power to the logging tool via the electrical line;traversing the casing with the logging tool;generating a magnetic field perpendicular to a sensor disposed on the logging tool, and perpendicular to a radial flow of conductive fluid through the casing wall, wherein the sensor is disposed perpendicular to the radial flow of conductive fluid;positioning the sensor adjacent to the casing interior wall;directly sensing the radial flow of conductive fluid through the casing wall with the sensor;receiving information representative of the radial flow of conductive fluid, from the sensor via the electrical line; andrecording the information representative of the radial flow of conductive fluid. 10. The method of claim 9, wherein the generating the magnetic field comprises generating an alternating magnetic field. 11. The method of claim 9, further comprising generating a logging graph of a casing position versus an amount of the radial flow of conductive fluid, from the information received from the sensor. 12. The method of claim 11, wherein the position comprises a depth in the casing. 13. The method of claim 11, wherein the position further comprises an azimuthal orientation in the casing. 14. The method of claim 9, wherein the sensor comprises a pair of electrodes, and wherein the generating the magnetic field further comprises generating the magnetic field perpendicular to an imaginary line between the electrodes. 15. The method of claim 9, wherein the sensing the radial flow of conductive fluid further comprises sensing as the logging tool traverses the casing away from an insertion point. 16. The method of claim 9, further comprising removing the logging tool from the casing after traversing the casing. 17. A method of measuring radial fluid flow in a casing having an interior wall, the method comprising: inserting a detection tool having a sensor into the casing, the sensor having a pair of electrodes;traversing the casing with the detection tool;positioning the sensor adjacent to the casing interior wall;generating an electromagnetic field having an orientation such that the electromagnetic field, a radial flow of conductive fluid through the casing wall, and an imaginary line interconnecting the pair of electrodes are all orthogonal to each other;directly detecting the radial flow of conductive fluid through the casing wall with the sensor; andrecording data related to the radial flow of conductive fluid detected by the sensor. 18. The method of claim 17, wherein the detection tool is coupled to an electrical line, and wherein the method further comprises: providing electrical power to the detection tool via the electrical line; andtransferring the data related to the radial flow of conductive fluid from the sensor to a remote recording device via the electrical line. 19. The method of claim 17, further comprising recording a casing positional information of the detection tool in the casing. 20. The method of claim 19, further comprising graphically plotting the casing positional information versus an amount of the radial flow of conductive fluid, from the data transferred from the sensor. 21. The method of claim 19, wherein the casing positional information comprises a depth in the casing. 22. The method of claim 19, wherein the casing positional information comprises an azimuthal orientation in the casing. 23. The method of claim 17, wherein the data related to the radial flow of conductive fluid comprises a signal representative of a voltage level proportional to a radial flow rate of the conductive fluid. 24. The method of claim 17, wherein the generating the electromagnetic field comprises generating an alternating electromagnetic field. 25. The method of claim 17, wherein the sensor is coupled to a body of the detection tool by an arm, and wherein the method further comprises rotating the arm to sweep the sensor around the interior wall of the casing. 26. The method of claim 25, further comprising exerting pressure radially outward on the casing wall with the arm.
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