CA2499832A1 - Ruggedized multi-layer printed circuit board based downhole antenna - Google Patents
Ruggedized multi-layer printed circuit board based downhole antenna Download PDFInfo
- Publication number
- CA2499832A1 CA2499832A1 CA002499832A CA2499832A CA2499832A1 CA 2499832 A1 CA2499832 A1 CA 2499832A1 CA 002499832 A CA002499832 A CA 002499832A CA 2499832 A CA2499832 A CA 2499832A CA 2499832 A1 CA2499832 A1 CA 2499832A1
- Authority
- CA
- Canada
- Prior art keywords
- antenna
- printed circuit
- circuit board
- downhole tool
- transmitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract 23
- 238000005553 drilling Methods 0.000 claims abstract 5
- 238000003384 imaging method Methods 0.000 claims abstract 2
- 230000035945 sensitivity Effects 0.000 claims abstract 2
- 230000005670 electromagnetic radiation Effects 0.000 claims 21
- 238000000034 method Methods 0.000 claims 17
- 230000015572 biosynthetic process Effects 0.000 claims 9
- 239000000463 material Substances 0.000 claims 6
- 239000004020 conductor Substances 0.000 claims 3
- 239000003381 stabilizer Substances 0.000 claims 3
- 239000004952 Polyamide Substances 0.000 claims 2
- 229910010293 ceramic material Inorganic materials 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 2
- 229920002647 polyamide Polymers 0.000 claims 2
- 239000011226 reinforced ceramic Substances 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/30—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with electromagnetic waves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/04—Adaptation for subterranean or subaqueous use
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
Abstract
The specification discloses a printed circuit board based ferrite core antenna. The traces (54,58) of the boards (50,52) form the windings for the antenna, and various layers (62A, 62B, 62C) of the printed circuit board hol d a ferrite core (74) for the windings in place. The specification further discloses use of such printed circuit board based ferrite core antennas in downhole electromagnetic wave resistivity tools such that azimuthally sensitivity resistivity readings may be taken, and borehole imaging can be performed, even in oil-based drilling fluids.
Claims (17)
1. An antenna having a plurality of turns of electrical conduction path around a ferrite core, and wherein the plurality of turns of electrical conduction path comprise traces on printed circuit boards on two sides of the ferrite core.
2. The antenna as defined in claim 1 wherein the printed circuit boards are on opposing sides of the ferrite core.
3. The antenna as defined in claim 2 wherein the printed circuit boards further comprise:
a first printed circuit board having a plurality of traces substantially parallel to and spanning a width of the first printed circuit board; and a second printed circuit board having a plurality of traces forming an angle to and spanning a width of the second printed circuit board that corresponds to the width of the first pointed circuit board.
a first printed circuit board having a plurality of traces substantially parallel to and spanning a width of the first printed circuit board; and a second printed circuit board having a plurality of traces forming an angle to and spanning a width of the second printed circuit board that corresponds to the width of the first pointed circuit board.
4. The antenna as defined in claim 3 wherein each of the first and second printed circuit boards further comprises a length, and wherein the lengths of the printed circuit boards are greater than their widths.
5. The antenna as defined in claim 2 further comprising an intermediate board between the printed circuit boards, the intermediate board having a central opening, and wherein the ferrite core is within the central opening of the intermediate board.
6. The antenna as defined in claim 5 wherein traces on the printed circuit boards are coupled through conduction holes in the intermediate board.
7. The antenna as defined in claim 6 wherein coupling of the traces of the printed circuit boards through the conduction holes further comprises wires extending between the printed circuit boards through the conduction holes.
8. The antenna as defined in claim 5 wherein the printed circuit boards and the intermediate board with the central opening are sealed together forming an inner cavity, and wherein the ferrite core is within the inner cavity.
9. The antenna as defined in claim 1 wherein printed circuit boards further comprise a glass reinforced ceramic material.
10. The antenna as defined in claim 1 wherein the printed circuit boards further comprise a polyamide material.
11. An antenna comprising:
a first circuit board having a length, a width, and a plurality of electrical traces spanning the first circuit board substantially parallel to the width;
a second circuit board having a length, a width, and a plurality of electrical traces spanning the first circuit board at an angle relative to the width, the first and second circuit boards in a stacked configuration;
a first circuit board having a length, a width, and a plurality of electrical traces spanning the first circuit board substantially parallel to the width;
a second circuit board having a length, a width, and a plurality of electrical traces spanning the first circuit board at an angle relative to the width, the first and second circuit boards in a stacked configuration;
12 an intermediate board between the first and second circuit board, the intermediate board having a length, a width, and a central opening;
ferrite material between the first and second circuit boards within the central opening of the intermediate board;
wherein the electrical traces on the first circuit board are electrically coupled to the electrical traces on the second circuit board forming a plurality of turns of electrical conduction path around the ferrite material, the plurality of turns of electrical conduction path and ferrite material, at least in part, forming the antenna.
12. The antenna as defined in claim 11 wherein the first circuit board, second circuit board and intermediate board are sealed such that the central opening of the intermediate board forms the inner cavity.
ferrite material between the first and second circuit boards within the central opening of the intermediate board;
wherein the electrical traces on the first circuit board are electrically coupled to the electrical traces on the second circuit board forming a plurality of turns of electrical conduction path around the ferrite material, the plurality of turns of electrical conduction path and ferrite material, at least in part, forming the antenna.
12. The antenna as defined in claim 11 wherein the first circuit board, second circuit board and intermediate board are sealed such that the central opening of the intermediate board forms the inner cavity.
13. The antenna as defined in claim 11 further comprising:
a plurality of contact holes proximate to an edge of the first circuit board along its length, each of the electrical traces of the first circuit board surrounding at least one of the contact holes;
a plurality of contact holes proximate to an edge of the second circuit board, each of the electrical traces of the second circuit board surrounding at least one of the contact holes;
a plurality of conduction paths extending through the intermediate board aligned with the contact holes in the first and second circuit boards; and electrically conductive material extending through the contact holes in each of the first and second circuit boards, and also extending through the conduction paths of the intermediate board, the electrically conductive material electrically coupled to the traces on the first and second circuit boards and, in combination with the traces, forming the plurality of turns of electrical conduction path around the ferrite material.
a plurality of contact holes proximate to an edge of the first circuit board along its length, each of the electrical traces of the first circuit board surrounding at least one of the contact holes;
a plurality of contact holes proximate to an edge of the second circuit board, each of the electrical traces of the second circuit board surrounding at least one of the contact holes;
a plurality of conduction paths extending through the intermediate board aligned with the contact holes in the first and second circuit boards; and electrically conductive material extending through the contact holes in each of the first and second circuit boards, and also extending through the conduction paths of the intermediate board, the electrically conductive material electrically coupled to the traces on the first and second circuit boards and, in combination with the traces, forming the plurality of turns of electrical conduction path around the ferrite material.
14. The antenna as defined in claim 13 wherein the electrically conductive material extending through the contact holes and conduction paths further comprising a plurality of cores.
15. The antenna as defined in claim 11 wherein printed circuit boards further comprise a glass reinforced ceramic material.
l6. The antenna as defined in claim 11 wherein the printed circuit boards further comprise a polyamide material.
17. A method comprising:
drilling a borehole using a bottomhole assembly comprising an electromagnetic wave resistivity measuring tool; and performing azimuthally sensitive resistivity readings of a formation surrounding the borehole using the electromagnetic wave resistivity tool while drilling.
18. ~The method as defined in claim 17 further comprising:
utilizing a first plurality of directionally sensitive receiving antennas positioned around a circumference of the resistivity measuring tool at a first spacing from a source of electromagnetic radiation; and utilizing a second plurality of directionally sensitive receiving antennas positioned around the circumference of the resistivity tool at a second spacing from the source of the electromagnetic radiation.
19. ~The method as defined in claim 18 wherein the utilizing steps further comprises utilizing a plurality of printed circuit board based ferrite core antennas.
20. ~The method as defined in claim 18 further comprising:
broadcasting electromagnetic radiation into the formation;
receiving in azimuthally sensitive directions portions of the electromagnetic radiation with the first plurality of receiving antennas; and receiving in azimuthally sensitive directions portions of the electromagnetic radiation with the second plurality of receiving antennas.
21. ~The method as defined in claim 20 wherein broadcasting the electromagnetic radiation into the formation further comprises broadcasting an omni-directional electromagnetic radiation pattern into the formation.
22. ~The method as defined in claim 21 wherein broadcasting an omni-directional electromagnetic radiation pattern into the formation further comprises broadcasting the electromagnetic radiation into the formation using a loop antenna substantially circumscribing the body of the resistivity measuring tool.
23. ~The method as defined in claim 20 wherein broadcasting the electromagnetic radiation into the formation further comprises broadcasting electromagnetic radiation from a plurality of transmitting antennas positioned around the circumference of the resistivity measuring tool.
24. ~The method as defined in claim 23 wherein broadcasting electromagnetic radiation from a plurality of transmitting antennas further comprises broadcasting electromagnetic radiation from a plurality of printed circuit board based ferrite core antennas.
25. ~A method comprising imaging a borehole using an electromagnetic radiation based resistivity tool.
26. ~The method as defined in claim 25 wherein the electromagnetic radiation based resistivity tools is part of a bottom hole assembly of a drilling operation.
27. ~The method as defined in claim 25 wherein using an electromagnetic based resistivity tools further comprises:
transmitting an electromagnetic signal from a transmitting antenna on the resistivity tool; and receiving the electromagnetic signal at an azimuthally sensitive receiving antenna on the resistivity tool body, the receiving antenna spaced apart from the transmitting antenna.
28. ~The method as defined in claim 27 wherein transmitting from a transmitting antenna further comprises transmitting the electromagnetic signal from a stabilizer blade coupled to the resistivity tool body.
29. ~The method as defined in claim 28 wherein receiving the electromagnetic signal at receiving antenna further comprises receiving the electromagnetic signal at the receiving antenna on the stabilizer blade.
30. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting an omni-directional electromagnetic signal from the transmitting antenna being a loop antenna.
31. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting an omni-directional electromagnetic signal from the transmitting antenna being a loop antenna.
32. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting the electromagnetic signal from a plurality of azimuthally directional transmitting antennas.
33. ~The method as defined in claim 32 further comprising:
receiving portions of the electromagnetic signal at a first plurality of azimuthally sensitive receiving antennas at a first spaced apart distance from the transmitting antenna; and receiving portions of the electromagnetic signal at a second plurality of azimuthally sensitive receiving antennas at a second spaced apart distance from the transmitting antenna.
34. ~A downhole tool comprising:
a source antenna mechanically coupled to a body of the downhole tool. the source antenna adapted to generate electromagnetic radiation;
a receiving antenna mechanically coupled to body of the downhole tool spaced apart from the source antenna, wherein the receiving antenna receives electromagnetic radiation from a particular azimuthal direction; and wherein the downhole tool is adapted to make electromagnetic radiation based borehole wall images.
35. ~The downhole tool as defined in claim 34 wherein the receiving antenna further comprises a printed circuit board based ferrite core antenna.
36. ~The downhole tool as defined in claim 35 wherein the printed circuit board based ferrite core antenna is covered by a cap with a slot therein to increase directional sensitivity.
37. ~The downhole tool as defined in claim 36 wherein the printed circuit board based ferrite core antenna is mounted approximately six inches from the source antenna.
38. ~The downhole tool as defined in claim 35 wherein the source antenna further comprises a printed circuit board based ferrite core antenna.
39. ~The downhole tool as defined in claim 38 wherein the source antenna further comprises a printed circuit board based ferrite core antenna.
40. ~The downhole tool as defined in claim 39 further comprising a second receiving antenna being a printed circuit board based ferrite core antenna mounted in the stabilizer fin.
41. ~The downhole tool as defined in claim 40 further comprising said second receiving antenna mounted approximately seven inches from the source antenna.
42. ~The downhole tool as defined in claim 35 further comprising a plurality printed circuit board based ferrite core receiving antennas mounted about a circumference of the body of the downhole tool.
43. ~The downhole tool as defined in claim 42 wherein each of the plurality of receiving antennas are mounted approximately six inches from an elevation of the source antenna.
44. ~The downhole tool as defined in claim 43 further comprising a second plurality of receiving antennas mounted about the circumference of the body of the downhole tool.
45. ~The downhole tool as defined in claim 44 wherein each of the plurality of receiving antennas are mounted approximately seven inches from an elevation of the source antenna.
46. ~A downhole tool comprising:
a source antenna mechanically coupled to a tool body, the source antenna generates electromagnetic radiation;
a first plurality of directionally sensitive receiving antennas mechanically coupled to the tool body about a circumference of the downhole tool at a first spaced distance from the source antenna;
a second plurality of directionally sensitive receiving antennas mechanically coupled to the tool body about the circumference of the downhole tool at a second spaced distance from the source antenna; and wherein the downhole tool takes electromagnetic radiation based azimuthally sensitive formation resistivity measurements of a formation surrounding a borehole during a drilling operation.
l6. The antenna as defined in claim 11 wherein the printed circuit boards further comprise a polyamide material.
17. A method comprising:
drilling a borehole using a bottomhole assembly comprising an electromagnetic wave resistivity measuring tool; and performing azimuthally sensitive resistivity readings of a formation surrounding the borehole using the electromagnetic wave resistivity tool while drilling.
18. ~The method as defined in claim 17 further comprising:
utilizing a first plurality of directionally sensitive receiving antennas positioned around a circumference of the resistivity measuring tool at a first spacing from a source of electromagnetic radiation; and utilizing a second plurality of directionally sensitive receiving antennas positioned around the circumference of the resistivity tool at a second spacing from the source of the electromagnetic radiation.
19. ~The method as defined in claim 18 wherein the utilizing steps further comprises utilizing a plurality of printed circuit board based ferrite core antennas.
20. ~The method as defined in claim 18 further comprising:
broadcasting electromagnetic radiation into the formation;
receiving in azimuthally sensitive directions portions of the electromagnetic radiation with the first plurality of receiving antennas; and receiving in azimuthally sensitive directions portions of the electromagnetic radiation with the second plurality of receiving antennas.
21. ~The method as defined in claim 20 wherein broadcasting the electromagnetic radiation into the formation further comprises broadcasting an omni-directional electromagnetic radiation pattern into the formation.
22. ~The method as defined in claim 21 wherein broadcasting an omni-directional electromagnetic radiation pattern into the formation further comprises broadcasting the electromagnetic radiation into the formation using a loop antenna substantially circumscribing the body of the resistivity measuring tool.
23. ~The method as defined in claim 20 wherein broadcasting the electromagnetic radiation into the formation further comprises broadcasting electromagnetic radiation from a plurality of transmitting antennas positioned around the circumference of the resistivity measuring tool.
24. ~The method as defined in claim 23 wherein broadcasting electromagnetic radiation from a plurality of transmitting antennas further comprises broadcasting electromagnetic radiation from a plurality of printed circuit board based ferrite core antennas.
25. ~A method comprising imaging a borehole using an electromagnetic radiation based resistivity tool.
26. ~The method as defined in claim 25 wherein the electromagnetic radiation based resistivity tools is part of a bottom hole assembly of a drilling operation.
27. ~The method as defined in claim 25 wherein using an electromagnetic based resistivity tools further comprises:
transmitting an electromagnetic signal from a transmitting antenna on the resistivity tool; and receiving the electromagnetic signal at an azimuthally sensitive receiving antenna on the resistivity tool body, the receiving antenna spaced apart from the transmitting antenna.
28. ~The method as defined in claim 27 wherein transmitting from a transmitting antenna further comprises transmitting the electromagnetic signal from a stabilizer blade coupled to the resistivity tool body.
29. ~The method as defined in claim 28 wherein receiving the electromagnetic signal at receiving antenna further comprises receiving the electromagnetic signal at the receiving antenna on the stabilizer blade.
30. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting an omni-directional electromagnetic signal from the transmitting antenna being a loop antenna.
31. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting an omni-directional electromagnetic signal from the transmitting antenna being a loop antenna.
32. ~The method as defined in claim 27 wherein transmitting an electromagnetic signal from a transmitting antenna further comprises transmitting the electromagnetic signal from a plurality of azimuthally directional transmitting antennas.
33. ~The method as defined in claim 32 further comprising:
receiving portions of the electromagnetic signal at a first plurality of azimuthally sensitive receiving antennas at a first spaced apart distance from the transmitting antenna; and receiving portions of the electromagnetic signal at a second plurality of azimuthally sensitive receiving antennas at a second spaced apart distance from the transmitting antenna.
34. ~A downhole tool comprising:
a source antenna mechanically coupled to a body of the downhole tool. the source antenna adapted to generate electromagnetic radiation;
a receiving antenna mechanically coupled to body of the downhole tool spaced apart from the source antenna, wherein the receiving antenna receives electromagnetic radiation from a particular azimuthal direction; and wherein the downhole tool is adapted to make electromagnetic radiation based borehole wall images.
35. ~The downhole tool as defined in claim 34 wherein the receiving antenna further comprises a printed circuit board based ferrite core antenna.
36. ~The downhole tool as defined in claim 35 wherein the printed circuit board based ferrite core antenna is covered by a cap with a slot therein to increase directional sensitivity.
37. ~The downhole tool as defined in claim 36 wherein the printed circuit board based ferrite core antenna is mounted approximately six inches from the source antenna.
38. ~The downhole tool as defined in claim 35 wherein the source antenna further comprises a printed circuit board based ferrite core antenna.
39. ~The downhole tool as defined in claim 38 wherein the source antenna further comprises a printed circuit board based ferrite core antenna.
40. ~The downhole tool as defined in claim 39 further comprising a second receiving antenna being a printed circuit board based ferrite core antenna mounted in the stabilizer fin.
41. ~The downhole tool as defined in claim 40 further comprising said second receiving antenna mounted approximately seven inches from the source antenna.
42. ~The downhole tool as defined in claim 35 further comprising a plurality printed circuit board based ferrite core receiving antennas mounted about a circumference of the body of the downhole tool.
43. ~The downhole tool as defined in claim 42 wherein each of the plurality of receiving antennas are mounted approximately six inches from an elevation of the source antenna.
44. ~The downhole tool as defined in claim 43 further comprising a second plurality of receiving antennas mounted about the circumference of the body of the downhole tool.
45. ~The downhole tool as defined in claim 44 wherein each of the plurality of receiving antennas are mounted approximately seven inches from an elevation of the source antenna.
46. ~A downhole tool comprising:
a source antenna mechanically coupled to a tool body, the source antenna generates electromagnetic radiation;
a first plurality of directionally sensitive receiving antennas mechanically coupled to the tool body about a circumference of the downhole tool at a first spaced distance from the source antenna;
a second plurality of directionally sensitive receiving antennas mechanically coupled to the tool body about the circumference of the downhole tool at a second spaced distance from the source antenna; and wherein the downhole tool takes electromagnetic radiation based azimuthally sensitive formation resistivity measurements of a formation surrounding a borehole during a drilling operation.
16 47. ~The downhole tool as defined in claim 46 wherein each of the first and second plurality of receiving antennas further comprises a printed circuit board based ferrite core antenna.
48. ~The downhole tool as defined in claim 46 wherein the first spaced distance of the first plurality is approximately eight to ten inches.
49. ~The downhole tool as defined in claim 48 wherein the second spaced distance of the second plurality is approximately fourteen to eighteen inches.
50. ~The downhole tool as defined in claim 46 wherein the source antenna further comprises a loop antenna which broadcasts omni-directional electromagnetic radiation.
51. ~The downhole tool as defined in claim 46 wherein the source antenna further comprises a plurality of printed circuit board based ferrite core antennas spaced about the circumference of the tool body.
48. ~The downhole tool as defined in claim 46 wherein the first spaced distance of the first plurality is approximately eight to ten inches.
49. ~The downhole tool as defined in claim 48 wherein the second spaced distance of the second plurality is approximately fourteen to eighteen inches.
50. ~The downhole tool as defined in claim 46 wherein the source antenna further comprises a loop antenna which broadcasts omni-directional electromagnetic radiation.
51. ~The downhole tool as defined in claim 46 wherein the source antenna further comprises a plurality of printed circuit board based ferrite core antennas spaced about the circumference of the tool body.
17
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2693270A CA2693270C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/254,184 | 2002-09-25 | ||
| US10/254,184 US7098858B2 (en) | 2002-09-25 | 2002-09-25 | Ruggedized multi-layer printed circuit board based downhole antenna |
| PCT/US2003/029791 WO2004030149A1 (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2693270A Division CA2693270C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2499832A1 true CA2499832A1 (en) | 2004-04-08 |
| CA2499832C CA2499832C (en) | 2010-05-11 |
Family
ID=31993282
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2693270A Expired - Lifetime CA2693270C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
| CA2499832A Expired - Lifetime CA2499832C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
| CA2861674A Expired - Lifetime CA2861674C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2693270A Expired - Lifetime CA2693270C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2861674A Expired - Lifetime CA2861674C (en) | 2002-09-25 | 2003-09-18 | Ruggedized multi-layer printed circuit board based downhole antenna |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US7098858B2 (en) |
| EP (1) | EP1550179B1 (en) |
| AU (1) | AU2003275099C1 (en) |
| BR (1) | BRPI0314581B1 (en) |
| CA (3) | CA2693270C (en) |
| NO (4) | NO336237B1 (en) |
| WO (1) | WO2004030149A1 (en) |
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- 2003-09-18 CA CA2693270A patent/CA2693270C/en not_active Expired - Lifetime
- 2003-09-18 WO PCT/US2003/029791 patent/WO2004030149A1/en active IP Right Grant
- 2003-09-18 AU AU2003275099A patent/AU2003275099C1/en not_active Ceased
- 2003-09-18 EP EP03759370.4A patent/EP1550179B1/en not_active Expired - Lifetime
- 2003-09-18 CA CA2499832A patent/CA2499832C/en not_active Expired - Lifetime
- 2003-09-18 CA CA2861674A patent/CA2861674C/en not_active Expired - Lifetime
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2005
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- 2005-10-04 US US11/243,131 patent/US7839346B2/en active Active
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2014
- 2014-10-30 NO NO20141286A patent/NO342375B1/en not_active IP Right Cessation
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2015
- 2015-02-04 NO NO20150155A patent/NO337511B1/en not_active IP Right Cessation
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- 2017-06-29 NO NO20171070A patent/NO344462B1/en not_active IP Right Cessation
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| NO20171070A1 (en) | 2005-06-22 |
| EP1550179B1 (en) | 2016-08-10 |
| CA2861674A1 (en) | 2004-04-08 |
| BRPI0314581B1 (en) | 2017-05-09 |
| BR0314581A (en) | 2005-08-09 |
| CA2499832C (en) | 2010-05-11 |
| WO2004030149A1 (en) | 2004-04-08 |
| US7098858B2 (en) | 2006-08-29 |
| NO20150155L (en) | 2005-06-22 |
| NO20141286L (en) | 2005-06-22 |
| NO20051150L (en) | 2005-06-22 |
| AU2003275099C1 (en) | 2007-09-27 |
| NO337511B1 (en) | 2016-05-02 |
| US20060022887A1 (en) | 2006-02-02 |
| US7839346B2 (en) | 2010-11-23 |
| CA2693270A1 (en) | 2004-04-08 |
| NO336237B1 (en) | 2015-06-29 |
| US20040056816A1 (en) | 2004-03-25 |
| AU2003275099A1 (en) | 2004-04-19 |
| CA2693270C (en) | 2014-12-02 |
| EP1550179A1 (en) | 2005-07-06 |
| NO344462B1 (en) | 2019-12-23 |
| EP1550179A4 (en) | 2006-10-18 |
| NO20051150D0 (en) | 2005-03-03 |
| NO342375B1 (en) | 2018-05-14 |
| CA2861674C (en) | 2016-05-03 |
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