JP2020528116A - 共振源を用いたダウンホールセンサシステム - Google Patents
共振源を用いたダウンホールセンサシステム Download PDFInfo
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- JP2020528116A JP2020528116A JP2020502202A JP2020502202A JP2020528116A JP 2020528116 A JP2020528116 A JP 2020528116A JP 2020502202 A JP2020502202 A JP 2020502202A JP 2020502202 A JP2020502202 A JP 2020502202A JP 2020528116 A JP2020528116 A JP 2020528116A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/125—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using earth as an electrical conductor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
Claims (22)
- 井戸用のダウンホールノードであって、
前記井戸のケーシングを囲むセメント内に設置されたノードハウジングと、
前記ノードハウジングから前記ケーシングまで延びる電源電極と、
前記ノードハウジングから前記セメントおよび/または周囲の地質構造まで延びる接地電極を備える、ダウンホールノード。 - 前記ダウンホールノードは、前記電源電極を介して電力を受け取り、前記接地電極を介して接地される同調フィルタを含むノード回路を備える、請求項1に記載のダウンホールノード。
- 前記ダウンホールノードは、前記ケーシングを介して伝送される電力を整流するためのブリッジ回路を含むノード回路を備える、請求項1に記載のダウンホールノード。
- 前記ダウンホールノードは、前記ケーシングを介して伝送される前記電力を調整するための調整電源を含むノード回路を備える、請求項1に記載のダウンホールノード。
- 前記ダウンホールノードは、前記ノードを過電圧から保護するために、前記電源電極と前記接地電極との間に接続されたツェナーダイオードを含むノード回路を備える、請求項1に記載のダウンホールノード。
- 前記ケーシングを覆う絶縁カバーをさらに備える、請求項1に記載のダウンホールノード。
- 前記絶縁カバーがプラスチックの層である、請求項1に記載のダウンホールノード。
- 前記絶縁カバーがペイント層である、請求項7に記載のダウンホールノード。
- 前記電源電極がガラス対金属シールで保護された前記ケーシングに接続されている、請求項1に記載のダウンホールノード。
- 井戸用の井戸遠隔測定システムであって、
前記井戸のケーシングを囲むセメント内に設置された1つ以上のノードと、
前記ケーシング内に定在波を確立することにより、前記ケーシングを介して前記ノードにAC電力を伝送するための電源を備える、井戸遠隔測定システム。 - 前記電源は、前記AC電力の周波数を調整して、前記ノードへの電力伝送を可能にする、請求項10に記載の井戸遠隔測定システム。
- 前記電源は、前記AC電力の周波数を調整して、前記ノードが前記定在波の波腹に位置することを保証する、請求項10に記載の井戸遠隔測定システム。
- 前記電源からの前記AC電力の周波数は、前記ノードからのデータに応じてチューニングされる、請求項10に記載の井戸遠隔測定システム。
- 前記ケーシングを覆う絶縁カバーをさらに備える、請求項10に記載の井戸遠隔測定システム。
- 前記絶縁カバーがプラスチックの層である、請求項14に記載の井戸遠隔測定システム。
- 前記絶縁カバーがペイント層である、請求項14に記載の井戸遠隔測定システム。
- 前記ノードのそれぞれが、
セメント内に設置されたノードハウジングと、
前記ノードハウジングから前記ケーシングまで延びる電源電極と、
前記ノードハウジングから前記セメントおよび/または周囲の地質構造まで延びる接地電極を備える、請求項10に記載の井戸遠隔測定システム。 - 前記ノードは、それぞれが前記電源電極を介して電力を受け取り、前記接地電極を介して接地される同調フィルタを含むノード回路を備える、請求項17に記載の井戸遠隔測定システム。
- 前記ノードは、それぞれが前記ケーシングを介して伝送される電力を整流するためのブリッジ回路を含むノード回路を備える、請求項17に記載の井戸遠隔測定システム。
- 前記ノードは、前記ケーシングを介して伝送される前記電力を調整するための調整電源を含むノード回路を備える、請求項17に記載の井戸遠隔測定システム。
- 前記ケーシングを覆う絶縁カバーをさらに備える、請求項10に記載の井戸遠隔測定システム。
- 前記絶縁カバーは、プラスチックの層またはペイント層である、請求項21に記載の井戸遠隔測定システム。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762535578P | 2017-07-21 | 2017-07-21 | |
US62/535,578 | 2017-07-21 | ||
US15/783,670 US10669817B2 (en) | 2017-07-21 | 2017-10-13 | Downhole sensor system using resonant source |
US15/783,670 | 2017-10-13 | ||
PCT/US2018/042981 WO2019018706A1 (en) | 2017-07-21 | 2018-07-20 | DOWNHOLE SENSOR SYSTEM USING RESONANT SOURCE |
Publications (2)
Publication Number | Publication Date |
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JP2020528116A true JP2020528116A (ja) | 2020-09-17 |
JP7187531B2 JP7187531B2 (ja) | 2022-12-12 |
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Application Number | Title | Priority Date | Filing Date |
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JP2020502202A Active JP7187531B2 (ja) | 2017-07-21 | 2018-07-20 | 共振源を用いたダウンホールセンサシステム |
Country Status (3)
Country | Link |
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US (1) | US10669817B2 (ja) |
JP (1) | JP7187531B2 (ja) |
WO (1) | WO2019018706A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10669817B2 (en) * | 2017-07-21 | 2020-06-02 | The Charles Stark Draper Laboratory, Inc. | Downhole sensor system using resonant source |
GB201713209D0 (en) * | 2017-08-17 | 2017-10-04 | Ziebel As | Well logging assembly |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0422202A (ja) * | 1990-05-17 | 1992-01-27 | Sekiyu Kodan | 送信装置 |
JPH06261008A (ja) * | 1993-03-04 | 1994-09-16 | Sekiyu Kodan | 信号伝送システム |
JPH0841860A (ja) * | 1994-08-01 | 1996-02-13 | Sano Takeshi | 地盤改良工の施工効果判定方法およびそれに用いる装置 |
JPH11224395A (ja) * | 1998-02-04 | 1999-08-17 | Oyo Corp | 地中コントロール通信方法及び装置 |
WO2001065066A1 (en) * | 2000-03-02 | 2001-09-07 | Shell Internationale Research Maatschappij B.V. | Wireless communication using well casing |
US20010033164A1 (en) * | 2000-01-24 | 2001-10-25 | Vinegar Harold J. | Focused through-casing resistivity measurement |
JP2002541721A (ja) * | 1999-04-08 | 2002-12-03 | ハネウエル・インターナショナル・インコーポレーテッド | 地下計器パッケージとのデータ通信を行うための方法および装置 |
WO2003029615A1 (en) * | 2001-10-01 | 2003-04-10 | Services Petroliers Schlumberger | Apparatus for monitoring undergound formations |
JP2012519786A (ja) * | 2009-03-06 | 2012-08-30 | ビーピー・コーポレーション・ノース・アメリカ・インコーポレーテッド | 無線センサーによってバリヤシステムの完全性を監視する装置及び方法 |
US20120256634A1 (en) * | 2011-04-07 | 2012-10-11 | Marian Morys | Electrode system and sensor for an electrically enhanced underground process |
US20140222343A1 (en) * | 2013-02-01 | 2014-08-07 | Halliburton Energy Services, Inc. ("HESI") | Distributed feedback fiber laser strain sensor systems and methods for subsurface em field monitoring |
Family Cites Families (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4511844A (en) | 1982-12-10 | 1985-04-16 | Panhandle Eastern Pipe Line Company | E-Log I field computer |
US5126654A (en) | 1989-02-10 | 1992-06-30 | New York Gas Group | Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipeline |
US5087873A (en) | 1990-04-02 | 1992-02-11 | New York Gas Group | Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipeline |
US5467083A (en) | 1993-08-26 | 1995-11-14 | Electric Power Research Institute | Wireless downhole electromagnetic data transmission system and method |
FR2712626B1 (fr) * | 1993-11-17 | 1996-01-05 | Schlumberger Services Petrol | Procédé et dispositif pour la surveillance et le contrôle de formations terrestres constituant un réservoir de fluides . |
EP0721053A1 (en) * | 1995-01-03 | 1996-07-10 | Shell Internationale Researchmaatschappij B.V. | Downhole electricity transmission system |
US6125935A (en) * | 1996-03-28 | 2000-10-03 | Shell Oil Company | Method for monitoring well cementing operations |
GB2338253B (en) | 1998-06-12 | 2000-08-16 | Schlumberger Ltd | Power and signal transmission using insulated conduit for permanent downhole installations |
US6587037B1 (en) * | 1999-02-08 | 2003-07-01 | Baker Hughes Incorporated | Method for multi-phase data communications and control over an ESP power cable |
US6633236B2 (en) | 2000-01-24 | 2003-10-14 | Shell Oil Company | Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters |
US7170424B2 (en) | 2000-03-02 | 2007-01-30 | Shell Oil Company | Oil well casting electrical power pick-off points |
US6434372B1 (en) | 2001-01-12 | 2002-08-13 | The Regents Of The University Of California | Long-range, full-duplex, modulated-reflector cell phone for voice/data transmission |
US6747569B2 (en) | 2001-02-02 | 2004-06-08 | Dbi Corporation | Downhole telemetry and control system |
EP1662673B1 (en) | 2004-11-26 | 2017-01-25 | Services Pétroliers Schlumberger | Method and apparatus for communicating across casing |
US7504963B2 (en) | 2005-05-21 | 2009-03-17 | Hall David R | System and method for providing electrical power downhole |
GB2433112B (en) * | 2005-12-06 | 2008-07-09 | Schlumberger Holdings | Borehole telemetry system |
AU2007292254B2 (en) | 2006-09-08 | 2013-09-26 | Chevron U.S.A., Inc. | A telemetry apparatus and method for monitoring a borehole |
US20080143552A1 (en) * | 2006-12-13 | 2008-06-19 | Mallison Edgar R | Sensor array for down-hole measurement |
US8106791B2 (en) | 2007-04-13 | 2012-01-31 | Chevron U.S.A. Inc. | System and method for receiving and decoding electromagnetic transmissions within a well |
US9601270B2 (en) | 2008-09-27 | 2017-03-21 | Witricity Corporation | Low AC resistance conductor designs |
US7880484B2 (en) | 2008-11-10 | 2011-02-01 | Saudi Arabian Oil Company | Method and apparatus for estimating the condition of a coating on an underground pipeline |
US9103198B2 (en) | 2010-11-12 | 2015-08-11 | Chevron U.S.A. Inc. | System and method for remote sensing |
US9270342B2 (en) | 2011-12-16 | 2016-02-23 | Qualcomm Incorporated | System and method for low loss wireless power transmission |
WO2014124344A1 (en) | 2013-02-08 | 2014-08-14 | Wilson Kenneth B | An improved power transmission system and method using a conducting tube |
US9958849B2 (en) | 2013-02-20 | 2018-05-01 | Schlumberger Technology Corporation | Cement data telemetry via drill string |
US20190218894A9 (en) * | 2013-03-15 | 2019-07-18 | Fastcap Systems Corporation | Power system for downhole toolstring |
US11417460B2 (en) | 2013-11-08 | 2022-08-16 | Schlumberger Technology Corporation | Slide-on inductive coupler system |
US9556727B2 (en) | 2014-03-25 | 2017-01-31 | Rensselaer Polytechnic Institute | Method and apparatus for acoustic downhole telemetry and power delivery system using transverse or torsional waves |
AU2015253516B2 (en) | 2014-05-01 | 2018-02-01 | Halliburton Energy Services, Inc. | Casing segment having at least one transmission crossover arrangement |
US10465462B2 (en) * | 2014-10-24 | 2019-11-05 | Magnum Oil Tools International, Ltd. | Electrically powered setting tool and perforating gun |
US9970286B2 (en) * | 2015-01-08 | 2018-05-15 | Sensor Developments As | Method and apparatus for permanent measurement of wellbore formation pressure from an in-situ cemented location |
AU2015384819A1 (en) * | 2015-03-03 | 2017-08-24 | Halliburton Energy Services, Inc. | Multi-coil RFID sensor assembly |
WO2016144348A1 (en) | 2015-03-11 | 2016-09-15 | Halliburton Energy Services, Inc. | Antenna for downhole communication using surface waves |
US10526888B2 (en) * | 2016-08-30 | 2020-01-07 | Exxonmobil Upstream Research Company | Downhole multiphase flow sensing methods |
US10669817B2 (en) * | 2017-07-21 | 2020-06-02 | The Charles Stark Draper Laboratory, Inc. | Downhole sensor system using resonant source |
-
2017
- 2017-10-13 US US15/783,670 patent/US10669817B2/en active Active
-
2018
- 2018-07-20 JP JP2020502202A patent/JP7187531B2/ja active Active
- 2018-07-20 WO PCT/US2018/042981 patent/WO2019018706A1/en active Application Filing
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0422202A (ja) * | 1990-05-17 | 1992-01-27 | Sekiyu Kodan | 送信装置 |
JPH06261008A (ja) * | 1993-03-04 | 1994-09-16 | Sekiyu Kodan | 信号伝送システム |
JPH0841860A (ja) * | 1994-08-01 | 1996-02-13 | Sano Takeshi | 地盤改良工の施工効果判定方法およびそれに用いる装置 |
JPH11224395A (ja) * | 1998-02-04 | 1999-08-17 | Oyo Corp | 地中コントロール通信方法及び装置 |
JP2002541721A (ja) * | 1999-04-08 | 2002-12-03 | ハネウエル・インターナショナル・インコーポレーテッド | 地下計器パッケージとのデータ通信を行うための方法および装置 |
US20010033164A1 (en) * | 2000-01-24 | 2001-10-25 | Vinegar Harold J. | Focused through-casing resistivity measurement |
WO2001065066A1 (en) * | 2000-03-02 | 2001-09-07 | Shell Internationale Research Maatschappij B.V. | Wireless communication using well casing |
WO2003029615A1 (en) * | 2001-10-01 | 2003-04-10 | Services Petroliers Schlumberger | Apparatus for monitoring undergound formations |
JP2012519786A (ja) * | 2009-03-06 | 2012-08-30 | ビーピー・コーポレーション・ノース・アメリカ・インコーポレーテッド | 無線センサーによってバリヤシステムの完全性を監視する装置及び方法 |
US20120256634A1 (en) * | 2011-04-07 | 2012-10-11 | Marian Morys | Electrode system and sensor for an electrically enhanced underground process |
US20140222343A1 (en) * | 2013-02-01 | 2014-08-07 | Halliburton Energy Services, Inc. ("HESI") | Distributed feedback fiber laser strain sensor systems and methods for subsurface em field monitoring |
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Publication number | Publication date |
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US10669817B2 (en) | 2020-06-02 |
JP7187531B2 (ja) | 2022-12-12 |
US20190024481A1 (en) | 2019-01-24 |
WO2019018706A1 (en) | 2019-01-24 |
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