CA2152520A1 - Electrical Heating of Mineral Well Deposits Using Downhole Impedance Transformation Networks - Google Patents

Electrical Heating of Mineral Well Deposits Using Downhole Impedance Transformation Networks

Info

Publication number
CA2152520A1
CA2152520A1 CA2152520A CA2152520A CA2152520A1 CA 2152520 A1 CA2152520 A1 CA 2152520A1 CA 2152520 A CA2152520 A CA 2152520A CA 2152520 A CA2152520 A CA 2152520A CA 2152520 A1 CA2152520 A1 CA 2152520A1
Authority
CA
Canada
Prior art keywords
casing
heating
reservoir
primary
electrical
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
Application number
CA2152520A
Other languages
French (fr)
Other versions
CA2152520C (en
Inventor
Jack E. Bridges
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.)
Uentech Corp
Original Assignee
Uentech Corp
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 Uentech Corp filed Critical Uentech Corp
Publication of CA2152520A1 publication Critical patent/CA2152520A1/en
Application granted granted Critical
Publication of CA2152520C publication Critical patent/CA2152520C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
    • E21B36/04—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones using electrical heaters

Abstract

The invention relates to an A.C. electrical heating system for heating a fluid reservoir in the vicinity of a mineral fluid well, utilizing A.C. electrical power in a range of 25 Hz to 30 KHz. The well comprises a borehole extending down through an overburden and through a subterranean fluid (oil) reservoir; the well has a casing that includes an upper electrically conductive casing around the borehole in the overburden, at least one electrically conductive heating electrode located in the reservoir and an electrically insulating casing interposed between the upper casing and the heating electrode. An electrically isolated conductor such as a conductive production tubing extends down through the casing. The heating system comprises an electrical A.C. power source having first and second outputs, a downhole voltage-reducing impedance transformation network having a primary and a secondary, primary connection means connecting the primary of the transformation network to the first and second ouputs of the power source and secondary connection means connecting the secondary of the transformation network to the heating electrode.
CA002152520A 1995-03-01 1995-06-23 Electrical heating of mineral well deposits using downhole impedance transformation networks Expired - Fee Related CA2152520C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US396,620 1995-03-01
US08/396,620 US5621844A (en) 1995-03-01 1995-03-01 Electrical heating of mineral well deposits using downhole impedance transformation networks

Publications (2)

Publication Number Publication Date
CA2152520A1 true CA2152520A1 (en) 1996-09-02
CA2152520C CA2152520C (en) 2000-02-01

Family

ID=23567979

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002152520A Expired - Fee Related CA2152520C (en) 1995-03-01 1995-06-23 Electrical heating of mineral well deposits using downhole impedance transformation networks

Country Status (2)

Country Link
US (1) US5621844A (en)
CA (1) CA2152520C (en)

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Also Published As

Publication number Publication date
US5621844A (en) 1997-04-15
CA2152520C (en) 2000-02-01

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