1
Jack E Bridges, Joseph O Enk, Homer L Spencer, Vincent R Young: Method and apparatus for forming an insulated oil well casing. ORS Development Corporation, Kinzer Plyer Dorn McEachran & Jambor, December 27, 1988: US04793409 (129 worldwide citation)

A method and apparatus for forming an electrically conductive externally insulated casing for an oil well of the type in which the casing carries electrical current to a primary heating electrode positioned downhole, using multiple prefabricated casing segments; each casing segment is a long steel p ...


2
Jack E Bridges, Thomas J Bajzek, Kenneth E Hofer, Homer L Spencer, Larry G Smith, Vincent R Young: Robust electrical heating systems for mineral wells. Uentech Corporation, Kinzer Plyer Dorn McEachran & Jambor, December 3, 1991: US05070533 (110 worldwide citation)

Electrical heating system for mineral wells, particularly oil wells, in which the reservoir or "pay zone" is heat stimulated or some well components (e.g., the tubing) are heated, or both, by electrical power supplied to a multi-perforate electrode have the operating efficiency enhanced by effective ...


3
Thomas A La Rovere, Homer L Spencer: Resistive down hole heating tool. John Russell Uren, September 13, 2005: US06942032 (91 worldwide citation)

A heating tool used for heating cement and/or a ground formation zone and melting billets in a down hole application for sealing oil and gas wells from gas migration. The heating tool has a billet loader which allows a plurality of billets to be loaded into the top of the tool and which billets then ...


4
Jack E Bridges, Guggilam C Sresty, Vincent R Young, Homer L Spencer: Mineral well heating systems. ORS Development Corporation, Kinzer Plyer Dorn McEachran & Jambor, December 13, 1988: US04790375 (63 worldwide citation)

Heating systems for mineral wells (e.g. oil wells) employ electrical power sources, sometimes operating at relatively high frequencies, that are connected to the well casing and production tubing so as to provide a coaxial line electrical heater projecting down into the well. The heating pattern of ...


5
Homer L Spencer: Oil and gas well alloy squeezing method and apparatus. Homer L Spencer, John Russell Uren, December 7, 2004: US06828531 (13 worldwide citation)

Method and apparatus for melting a material and squeezing the melted material through casing perforations into a fault within the cement or formation of an oil or gas well. A heating tool carries solid material which is melted at depth within the well and adjacent to the casing perforations. The liq ...


6
Homer L Spencer: Method and apparatus for sealing multiple casings for oil and gas wells. Homer L Spencer, December 16, 2003: US06664522 (9 worldwide citation)

Apparatus and method for melting material in any one or a plurality of casings of an oil or gas well and thereby sealing the annulus to prevent gas leakage and the like. The material is positioned within any of the annuluses between the production and surface casing of the well and above the well ce ...


7
Homer L Spencer: Eutectic metal sealing method and apparatus for oil and gas wells. Tesla, John Russell Uren, May 7, 2002: US06384389 (7 worldwide citation)

Apparatus and method for melting metal in the annulus of an oil or gas well and thereby sealing the annulus to prevent shallow gas leakage and the like. Conveniently, eutectic metal is positioned within the annulus between the production and surface casing of the well and above the well cement. An e ...


8
Homer L Spencer: Oil and gas well alloy squeezing method and apparatus. John Russell Uren, November 11, 2008: US07449664 (4 worldwide citation)

Method and apparatus for melting a material and squeezing the melted material through casing perforations into a fault within the cement or formation of an oil or gas well. A heating tool carries solid material which is melted at depth within the well and adjacent to the casing perforations. The liq ...


9
Homer L Spencer: Sealing method and apparatus for oil and gas wells. John Russell Uren, October 23, 2007: US07285762 (1 worldwide citation)

Apparatus and method for melting material in the annulus of an oil or gas well and thereby sealing the annulus to prevent shallow gas leakage and the like. Conveniently, the material is positioned within the annulus between the production and surface casing of the well and above the well cement. A h ...


10
Thomas A La Rovere, Homer L Spencer: Resistive down hole heating tool. Homer L Spencer, John Russell Uren, January 23, 2007: US07165607

A heating tool used for heating cement and/or a ground formation zone and melting billets in a down hole application for sealing oil and gas wells from gas migration. The heating tool has a billet loader which allows a plurality of billets to be loaded into the top of the tool and which billets then ...