GB2276768A - Thermal safety switch for use with electrically actuated wellbore tools - Google Patents

Thermal safety switch for use with electrically actuated wellbore tools

Info

Publication number
GB2276768A
GB2276768A GB9411845A GB9411845A GB2276768A GB 2276768 A GB2276768 A GB 2276768A GB 9411845 A GB9411845 A GB 9411845A GB 9411845 A GB9411845 A GB 9411845A GB 2276768 A GB2276768 A GB 2276768A
Authority
GB
United Kingdom
Prior art keywords
safety switch
electrically actuated
thermal safety
wellbore tools
actuated wellbore
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.)
Withdrawn
Application number
GB9411845A
Other versions
GB9411845D0 (en
Inventor
Richard J Ross
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.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
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 Baker Hughes Inc filed Critical Baker Hughes Inc
Publication of GB9411845D0 publication Critical patent/GB9411845D0/en
Publication of GB2276768A publication Critical patent/GB2276768A/en
Withdrawn legal-status Critical Current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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/116—Gun or shaped-charge perforators
    • E21B43/1185—Ignition systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/045—Arrangements for electric ignition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/323—Thermally-sensitive members making use of shape memory materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/01—Details
    • H01H61/0107—Details making use of shape memory materials
    • H01H2061/0115—Shape memory alloy [SMA] actuator formed by coil spring

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Thermally Actuated Switches (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

An electrical safety switch for use with an electrically actuated wellbore tool, the switch having a first electrically conductive (25) member and a second electrically conductive member (35). At least one biasing member (27), including a thermally responsive biasing member, is arranged to prevent electrical communication between the first and second electrically conductive members until a selected thermal condition is obtained. <IMAGE>
GB9411845A 1992-10-28 1994-06-14 Thermal safety switch for use with electrically actuated wellbore tools Withdrawn GB2276768A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96733292A 1992-10-28 1992-10-28
PCT/US1993/010445 WO1994010422A1 (en) 1992-10-28 1993-10-26 Thermal safety switch for use with electrically actuated wellbore tools

Publications (2)

Publication Number Publication Date
GB9411845D0 GB9411845D0 (en) 1994-08-03
GB2276768A true GB2276768A (en) 1994-10-05

Family

ID=25512644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9411845A Withdrawn GB2276768A (en) 1992-10-28 1994-06-14 Thermal safety switch for use with electrically actuated wellbore tools

Country Status (3)

Country Link
AU (1) AU5456194A (en)
GB (1) GB2276768A (en)
WO (1) WO1994010422A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7487833B2 (en) 2006-05-18 2009-02-10 Schlumberger Technology Corporation Safety apparatus for perforating system
US8056632B2 (en) 2007-12-21 2011-11-15 Schlumberger Technology Corporation Downhole initiator for an explosive end device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327792A (en) * 1965-10-22 1967-06-27 Profitable Resources Inc Jet perforating gun
US3594674A (en) * 1969-08-13 1971-07-20 Robertshaw Controls Co Temperature-responsive control devcies adjustably responsive to various operating temperatures
US3612189A (en) * 1969-10-24 1971-10-12 Exxon Production Research Co Well perforating and treating apparatus
US4041865A (en) * 1975-06-04 1977-08-16 Seth F. Evans Method and apparatus for detonating explosives
GB2114294A (en) * 1982-01-25 1983-08-17 Delta Memory Metal Ltd Temperature transducer
US4457383A (en) * 1982-04-27 1984-07-03 Boop Gene T High temperature selective fire perforating gun and switch therefor
US5070788A (en) * 1990-07-10 1991-12-10 J. V. Carisella Methods and apparatus for disarming and arming explosive detonators
US5159145A (en) * 1991-08-27 1992-10-27 James V. Carisella Methods and apparatus for disarming and arming well bore explosive tools

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3327792A (en) * 1965-10-22 1967-06-27 Profitable Resources Inc Jet perforating gun
US3594674A (en) * 1969-08-13 1971-07-20 Robertshaw Controls Co Temperature-responsive control devcies adjustably responsive to various operating temperatures
US3612189A (en) * 1969-10-24 1971-10-12 Exxon Production Research Co Well perforating and treating apparatus
US4041865A (en) * 1975-06-04 1977-08-16 Seth F. Evans Method and apparatus for detonating explosives
GB2114294A (en) * 1982-01-25 1983-08-17 Delta Memory Metal Ltd Temperature transducer
US4457383A (en) * 1982-04-27 1984-07-03 Boop Gene T High temperature selective fire perforating gun and switch therefor
US5070788A (en) * 1990-07-10 1991-12-10 J. V. Carisella Methods and apparatus for disarming and arming explosive detonators
US5159145A (en) * 1991-08-27 1992-10-27 James V. Carisella Methods and apparatus for disarming and arming well bore explosive tools

Also Published As

Publication number Publication date
GB9411845D0 (en) 1994-08-03
AU5456194A (en) 1994-05-24
WO1994010422A1 (en) 1994-05-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)