GB9908575D0 - Downhole electronics protection apparatus - Google Patents

Downhole electronics protection apparatus

Info

Publication number
GB9908575D0
GB9908575D0 GBGB9908575.5A GB9908575A GB9908575D0 GB 9908575 D0 GB9908575 D0 GB 9908575D0 GB 9908575 A GB9908575 A GB 9908575A GB 9908575 D0 GB9908575 D0 GB 9908575D0
Authority
GB
United Kingdom
Prior art keywords
protection apparatus
downhole electronics
electronics protection
downhole
protection
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.)
Ceased
Application number
GBGB9908575.5A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Expro North Sea Ltd
Original Assignee
Expro North Sea Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Expro North Sea Ltd filed Critical Expro North Sea Ltd
Priority to GBGB9908575.5A priority Critical patent/GB9908575D0/en
Publication of GB9908575D0 publication Critical patent/GB9908575D0/en
Priority to AU41287/00A priority patent/AU4128700A/en
Priority to PCT/GB2000/001377 priority patent/WO2000064024A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
GBGB9908575.5A 1999-04-16 1999-04-16 Downhole electronics protection apparatus Ceased GB9908575D0 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GBGB9908575.5A GB9908575D0 (en) 1999-04-16 1999-04-16 Downhole electronics protection apparatus
AU41287/00A AU4128700A (en) 1999-04-16 2000-04-17 Downhole electronics protection apparatus
PCT/GB2000/001377 WO2000064024A1 (en) 1999-04-16 2000-04-17 Downhole electronics protection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9908575.5A GB9908575D0 (en) 1999-04-16 1999-04-16 Downhole electronics protection apparatus

Publications (1)

Publication Number Publication Date
GB9908575D0 true GB9908575D0 (en) 1999-06-09

Family

ID=10851550

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9908575.5A Ceased GB9908575D0 (en) 1999-04-16 1999-04-16 Downhole electronics protection apparatus

Country Status (3)

Country Link
AU (1) AU4128700A (en)
GB (1) GB9908575D0 (en)
WO (1) WO2000064024A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1314239A2 (en) 2000-08-31 2003-05-28 Baker Hughes Incorporated Filter-switched drive operating mode control
US6667461B1 (en) * 2002-06-19 2003-12-23 Tyco Electronics Corporation Multiple load protection and control device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3459256B2 (en) * 1993-08-23 2003-10-20 レイケム・コーポレイション Use of Positive Thermistor in Wire Harness
US5960883A (en) * 1995-02-09 1999-10-05 Baker Hughes Incorporated Power management system for downhole control system in a well and method of using same

Also Published As

Publication number Publication date
WO2000064024A1 (en) 2000-10-26
AU4128700A (en) 2000-11-02

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)