GB2343002A - Method and apparatus for signal bandpass sampling in measurement-while -drilling applications - Google Patents
Method and apparatus for signal bandpass sampling in measurement-while -drilling applicationsInfo
- Publication number
- GB2343002A GB2343002A GB0000117A GB0000117A GB2343002A GB 2343002 A GB2343002 A GB 2343002A GB 0000117 A GB0000117 A GB 0000117A GB 0000117 A GB0000117 A GB 0000117A GB 2343002 A GB2343002 A GB 2343002A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wellbore
- receiver
- electromagnetic
- transmitter
- housing
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A logging apparatus is provided for use in a wellbore for measuring an attribute of at least one of the wellbore and a surrounding formation, when coupled to a wellbore tubular expended in the wellbore. The logging apparatus includes a housing, at least one transmitter and at least one receiver. The transmitter is carried by the housing and is individually and selectively operable for producing electromagnetic interrogating signal at selected interrogation frequency for passage to the wellbore and surrounding formation. The receiver is carried by the housing in a selected position relative to the transmitter, and is tuned to receive electromagnetic signals at the interrogation frequency to the exclusion of other frequencies. A portion of at least one of the wellbore and surrounding formation has an attribute value which can be derived from at least one of amplitude attenuation of electromagnetic interrogating signal as determined from measurements of the electromagnetic interrogating signals taken through the receiver, and phase shift of electromagnetic interrogating signal as determined from measurements of electromagnetic signal taken through the receiver. The apparatus further includes means for sampling signals from the receiver or receivers at a sampling frequency which is less than the interrogation frequency. A controller member is provided for selectively energizing the transmitters and for selectively obtaining measurements of the electromagnetic interrogating signal with the receivers, and determining an accurate measure of the attribute value.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1997/011665 WO1999001785A1 (en) | 1997-07-02 | 1997-07-02 | Method and apparatus for signal bandpass sampling in measurement-while-drilling applications |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0000117D0 GB0000117D0 (en) | 2000-02-23 |
GB2343002A true GB2343002A (en) | 2000-04-26 |
GB2343002B GB2343002B (en) | 2002-01-09 |
Family
ID=22261208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0000117A Expired - Lifetime GB2343002B (en) | 1997-07-02 | 1997-07-02 | Method and apparatus for signal bandpass sampling in measurement-while -drilling applications |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3593197A (en) |
GB (1) | GB2343002B (en) |
WO (1) | WO1999001785A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7818840B2 (en) | 2007-11-09 | 2010-10-26 | Integrated Medical Systems, Inc. | Foldable, portable trauma treatment and monitoring patient platform |
US8033281B2 (en) | 2007-11-09 | 2011-10-11 | Todd Douglas Kneale | Modular transportable life support device |
ITRM20100479A1 (en) * | 2010-09-15 | 2012-03-16 | Istituto Naz Di Geofisica E Vulcanologia | PERMITTENCE METER AND ELECTRIC RESISTIVITY FOR NON-INVASIVE INVESTIGATIONS ON MATERIALS |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314573A2 (en) * | 1987-10-30 | 1989-05-03 | Schlumberger Limited | Well logging apparatus and method |
WO1991003114A1 (en) * | 1989-08-16 | 1991-03-07 | Titan Linkabit Corporation | Conversion of analog signal into i and q digital signals with enhanced image rejection |
-
1997
- 1997-07-02 GB GB0000117A patent/GB2343002B/en not_active Expired - Lifetime
- 1997-07-02 AU AU35931/97A patent/AU3593197A/en not_active Abandoned
- 1997-07-02 WO PCT/US1997/011665 patent/WO1999001785A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0314573A2 (en) * | 1987-10-30 | 1989-05-03 | Schlumberger Limited | Well logging apparatus and method |
WO1991003114A1 (en) * | 1989-08-16 | 1991-03-07 | Titan Linkabit Corporation | Conversion of analog signal into i and q digital signals with enhanced image rejection |
Non-Patent Citations (2)
Title |
---|
"A SIMPLE METHOD FOR SAMPLING IN-PHASE AND QUADRATURE COMPONENTS" RADER CM, IEEE TRANSACTIONS * |
ON AEROSPACE AND ELECTRONIC SYSTEMS, vol. AES-20 no.6 NOVEMBER 1984, PAGES 821-824 * |
Also Published As
Publication number | Publication date |
---|---|
GB0000117D0 (en) | 2000-02-23 |
WO1999001785A1 (en) | 1999-01-14 |
AU3593197A (en) | 1999-01-25 |
GB2343002B (en) | 2002-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20170701 |