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Title: Subsurface heaters with low sulfidation rates

Abstract

A system for heating a hydrocarbon containing formation includes a heater having an elongated ferromagnetic metal heater section. The heater is located in an opening in a formation. The heater section is configured to heat the hydrocarbon containing formation. The exposed ferromagnetic metal has a sulfidation rate that goes down with increasing temperature of the heater, when the heater is in a selected temperature range.

Inventors:
;
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1109469
Patent Number(s):
8606091
Application Number:
11/584,801
Assignee:
Shell Oil Company (Houston, TX)
Patent Classifications (CPCs):
C - CHEMISTRY C10 - PETROLEUM, GAS OR COKE INDUSTRIES C10G - CRACKING HYDROCARBON OILS
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
DOE Contract Number:  
ACO5-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

John, Randy Carl, and Vinegar, Harold J. Subsurface heaters with low sulfidation rates. United States: N. p., 2013. Web.
John, Randy Carl, & Vinegar, Harold J. Subsurface heaters with low sulfidation rates. United States.
John, Randy Carl, and Vinegar, Harold J. Tue . "Subsurface heaters with low sulfidation rates". United States. https://www.osti.gov/servlets/purl/1109469.
@article{osti_1109469,
title = {Subsurface heaters with low sulfidation rates},
author = {John, Randy Carl and Vinegar, Harold J},
abstractNote = {A system for heating a hydrocarbon containing formation includes a heater having an elongated ferromagnetic metal heater section. The heater is located in an opening in a formation. The heater section is configured to heat the hydrocarbon containing formation. The exposed ferromagnetic metal has a sulfidation rate that goes down with increasing temperature of the heater, when the heater is in a selected temperature range.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 10 00:00:00 EST 2013},
month = {Tue Dec 10 00:00:00 EST 2013}
}

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Multi-crosswell profile 3D imaging and method
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In situ thermal processing of a coal formation with a selected ratio of heat sources to production wells
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In situ thermal processing of an oil shale formation having permeable and impermeable sections
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In situ thermal processing of a hydrocarbon containing formation using conductor in conduit heat sources
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In situ shale-oil recovery process
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NMR logging of natural gas in reservoirs
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Process for in situ retorting of oil shale
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In situ thermal processing of coal formation with a selected hydrogen content and/or selected H/C ratio
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Reduced resistance skin effect heat generating system
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patent-application, May 2007


Wire and cable
patent, January 1991


Method and apparatus for pumping wells
patent, May 1993


Methods of cracking a crude product to produce additional crude products
patent-application, June 2007


In situ thermal processing of a hydrocarbon containing formation using distributed combustor heat sources
patent-application, March 2002


Insulated conductor temperature limited heater for subsurface heating coupled in a three-phase wye configuration
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In situ thermal processing of a hydrocarbon containing formation with a selected hydrogen content
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Production of a blending agent using an in situ thermal process in a relatively permeable formation
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Condensing vaporized water in situ to treat tar sands formations
patent-application, October 2008


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Optimum oil-well casing heating
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patent, December 1981


System for recovering viscous petroleum from thick tar sand
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Evaluation of downhole electric impedance heating systems for paraffin control in oil wells
journal, January 1992


Monitoring oil shale retorts by off-gas alkenealkane ratios
journal, June 1980


In situ thermal processing of a relatively impermeable formation in a reducing environment
patent-application, May 2003


Method of stimulating oil wells
patent, September 1993


Generating electricity from coal in situ
patent, February 1981


Low temperature barrier wellbores formed using water flushing
patent-application, May 2007


Ranging Methods for Developing Wellbores in Subsurface Formations
patent-application, August 2009


In situ thermal processing of a coal formation with carbon dioxide sequestration
patent, July 2004


Heat sources with conductive material for in situ thermal processing of an oil shale formation
patent, August 2005


Forming wellbores using acoustic methods
patent-application, July 2004


In situ thermal waste disposal system
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Insulated conductor temperature limited heaters
patent-application, July 2004


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patent-application, April 2002


High Temperature Methods for Forming Oxidizer Fuel
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patent, December 2000


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Sulfur barrier for use with in situ processes for treating formations
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In Situ thermal processing of a hydrocarbon containing formation to produce sulfur containing formation fluids
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In Situ Heat Treatment of a Tar Sands Formation After Drive Process Treatment
patent-application, April 2009


Process for the manufacture of gasoline
patent, February 1979


Titanium-containing molecular sieves
patent, February 1985


In situ thermal processing of a coal formation to produce hydrocarbons having a selected carbon number range
patent, May 2004


Wellbore profiling system
patent, February 2000


Method of analyzing fluid saturation using computerized axial tomography
patent, May 1987


Wellbore Manufacturing Processes for In Situ Heat Treatment Processis
patent-application, April 2009


Hydrocarbon recovery systems and methods
patent, November 1999


Shale oil recovery
patent, May 1981


Variable frequency temperature limited heaters
patent-application, December 2005


Conduit pulling apparatus and method for use in horizontal drilling
patent-application, August 2002


Method of producing methanol synthesis gas
patent, February 1991


Contained recovery of oily waste
patent, July 1989


Process for improving the effectiveness of process catalyst
patent, July 1997


Oil recovery process
patent, February 1995


Method and apparatus for determining distribution of fluids
patent, June 1987


Methods of producing alkylated hydrocarbons from an in situ heat treatment process liquid
patent-application, June 2007


Temperature limited heaters for heating subsurface formations or wellbores
patent-application, July 2004


In situ thermal processing and solution mining of an oil shale formation
patent, February 2006


Stationary system for the active and/or passive monitoring of an underground deposit
patent, November 1994


In situ retorting of oil shale
patent, April 1976


Method and apparatus for forming an electrical connection
patent, December 1996


In situ thermal processing of a coal formation to increase a permeability/porosity of the formation
patent, March 2005


Flameless combustor
patent, February 2000


Upgrading shale oil by a combination process
patent, August 1986


Sensor transport system for combination flash butt welder
patent, July 1998


Conversion of synthesis gas to hydrocarbon mixtures
patent, June 1978


Double barrier system for an in situ conversion process
patent, May 2009


Heating System for Crude Oil Transporting Metallic Tubes
patent-application, March 2002


Thermal processing of an oil shale formation to increase permeability of the formation
patent, May 2006


In situ thermal processing of an oil shale formation using a controlled heating rate
patent, May 2006


In situ thermal processing of a relatively permeable formation in a reducing environment
patent, May 2006


In situ thermal processing of a hydrocarbon containing formation using a controlled heating rate
patent, June 2004


Production of oil from low permeability formations by sequential steam fracturing
patent, February 1992


Tar sands extraction process
patent, November 1999


Situ thermal processing of a hydrocarbon containing formation to control product composition
patent, June 2004


Octane and total yield improvement in catalytic cracking
patent, January 1983


Monitoring of downhole parameters and tools utilizing fiber optics
patent, July 2003


Temperature limited heaters with relatively constant current
patent, January 2009


In situ recovery from a hydrocarbon containing formation
patent-application, April 2009


In situ thermal processing of a hydrocarbon containing formation by controlling a pressure of the formation
patent, June 2004


Production of synthesis gas from a hydrocarbon containing formation
patent, May 2004


In situ thermal processing of a coal formation and tuning production
patent, May 2004


In situ retorting of oil shale with pulsed water purge
patent, January 1987


Method for production of hydrocarbons from organic-rich rock
patent-application, December 2001


A Possible Mechanism of Alkene/Alkane Production
book, September 1981


Indirect thermal stimulation of production wells
patent, June 1981


In situ thermal processing of a coal formation using repeating triangular patterns of heat sources
patent, June 2004


Acoustic thermometer
patent, April 1997


In situ thermal processing of a coal formation to form a substantially uniform, relatively high permeable formation
patent, June 2004


In situ recovery from a hydrocarbon containing formation
patent, December 2008


Radiant plate heater for treatment of contaminated surfaces
patent, September 1996


Wireless reservoir production control
patent-application, February 2003


Conversion of synthesis gas to diesel fuel and gasoline
patent, August 1986


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patent, May 1989


In situ thermal processing of a hydrocarbon containing formation using exposed metal heat sources
patent, September 2004


Heat injection process
patent, October 1993


Plasma cutter for auxiliary power output of a power source
patent, November 2001


Application of a Microretort to Problems in Shade Pyrolysis
journal, July 1970


Method for enhanced recovery of viscous oil deposits
patent, October 1998


Subsurface electrical heaters using nitride insulation
patent-application, December 2006


Self-regulating porous heater device
patent, December 1988


Well treating process for installing a cable bundle containing strands of changing diameter
patent, April 1986


Heating rate variant elongated electrical resistance heater
patent, November 1987


In situ thermal recovery from a relatively permeable formation with controlled production rate
patent, June 2006


Slotted autoregulating heater
patent, January 1988


In situ thermal processing of an oil shale formation using horizontal heat sources
patent, October 2005


Temperature limited heater utilizing non-ferromagnetic conductor
patent-application, September 2008


Conductor-in-conduit heat sources for in situ thermal processing of an oil shale formation
patent, February 2006


Heater well method and apparatus
patent, May 2000


Method and system for introducing electric current into a well
patent, January 1988


NMR logging of natural gas reservoirs
patent, March 1996


Methanol from coal and natural gas
patent, October 1983


Oil recovery method
patent, February 1984


In situ thermal processing and remediation of an oil shale formation
patent, February 2006


Downhole combination tool
patent, November 1991


In situ thermal processing of a hydrocarbon containing formation in a reducing environment
patent, February 2006


Sheet heater
patent, March 1988


In Situ Heat Treatment from Multiple Layers of a Tar Sands Formation
patent-application, March 2009


Fiber optic temperature sensing
patent, November 1983


Upgrading shale oil by a combination process
patent, November 1986


Hydrogen gas-extraction module and method of fabrication
patent, November 2000


In situ thermal processing of an oil shale formation using a pattern of heat sources
patent, June 2007


Horizontal well gravity drainage combustion process for oil recovery
patent, October 1995


Producing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation
patent, September 2006


Crystalline zeolite ZSM-23 and synthesis thereof
patent, February 1978


Sour gas injection for use with in situ heat treatment
patent-application, July 2008


Coal gasification method
patent, January 1981


Multi-Step Heater Deployment in a Subsurface Formation
patent-application, August 2009


Method and apparatus for heating a wellbore
patent, April 2003


Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale
patent, August 1993


Expandable tubing for a well bore hole and method of expanding
patent, March 2002


Petroleum well having downhole sensors, communication and power
patent, January 2004


Electrical heater
patent, February 2000


Thermal recovery of hydrocarbons from tar sands
patent, November 1976


In situ thermal processing of a hydrocarbon containing formation in a hydrogen-rich environment
patent, April 2004


Process for the conversion of dimethyl ether
patent, March 1981


Electric cable having braidless polymeric ground plane providing fault detection
patent, September 2001


Mini-well temperature profiling process
patent, October 1986


Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
patent, October 2005


Method for analysis of failure of material employing imaging
patent, December 1989


Process for recovery of hydrocarbons and rejection of sand
patent, May 1994


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patent-application, August 2009


Modified in situ retorting of oil shale
patent, August 1983


Recovery of liquid hydrocarbons from oil shale by electromagnetic heating in situ
patent, December 1984


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patent-application, June 2007


Oil recovery process
patent, March 1994


Method for determining preselected properties of a crude oil
patent, April 1994


Process for the preparation of a Fischer-Tropsch catalyst and preparation of hydrocarbons from syngas
patent, February 1985


Method for producing natural gas from a coal seam
patent, July 1988


Process for converting gas to liquids
patent, January 2001


Induction Heaters Used to Heat Subsurface Formations
patent-application, August 2009


Recovery of products from oil shale
patent, May 2006


In situ thermal processing of a hydrocarbon containing formation with a selected atomic oxygen to carbon ratio
patent, April 2004


In situ thermal processing of a hydrocarbon containing formation using a movable heating element
patent, June 2005


Autoregulating heater
patent, June 1988


Controllable gas-lift well and valve
patent, April 2004


Combination of epithermal and inelastic neutron scattering methods to locate coal and oil shale zones
patent, March 1976


In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations
patent, February 1981


Heat injection process
patent, July 1995


In situ thermal processing of a hydrocarbon containing formation using a relatively slow heating rate
patent, July 2004


Downhole Burner System and Methods for Heating Subsurface Formations
patent-application, April 2009


Steam generator for a PEM fuel cell power plant
patent-application, August 2003


Heavy oil recovering
patent, June 1984


In situ thermal processing of a coal formation to produce hydrocarbon fluids and synthesis gas
patent, July 2004


Reduction of shale oil pour point
patent, March 1984


Heater utilizing copper-nickel alloy core
patent, October 1991


Crystalline metallophosphate compositions
patent, January 1982


Extraction of hydrocarbons in situ from underground hydrocarbon deposits
patent, February 1977


Heat exchanger antifoulant
patent, November 1985


In situ thermal processing of a hydrocarbon containing formation to produce oxygen containing formation fluids
patent, November 2005


In situ radio frequency selective heating system
patent, July 1984


Producing thin seams of coal in situ
patent, March 1977


In situ thermal recovery from a relatively permeable formation using gas to increase mobility
patent, November 2005


Horizontal well system
patent, July 2002


Downhole process control method utilizing seismic communication
patent, June 2003


Operating Laboratory Oil Shale Retorts In An In-Situ Mode
conference, April 2013


Production of alkyl aromatic hydrocarbons
patent, April 1976


Process for recovering products from tar sand
patent, October 1983


Method and system for reducing NO.sub.x and fuel emissions in a furnace
patent, June 1998


In Situ Oxidation of Subsurface Formations
patent-application, August 2009


Apparatus for focused electrode induced polarization logging
patent, April 1986


In situ recovery from a kerogen and liquid hydrocarbon containing formation
patent, March 2006


Thermal recovery method for viscous oil
patent, July 1986


Temperature limited heaters with relatively constant current
patent-application, January 2006


Recovery of oil by in situ hydrogenation
patent, July 1986


Varying heating in dawsonite zones in hydrocarbon containing formations
patent, July 2009


Solution mining systems and methods for treating hydrocarbon containing formations
patent, July 2009


In situ thermal recovery from a relatively permeable formation
patent, January 2006


Inhibiting effects of sloughing in wellbores
patent-application, December 2005


Thermal mineral extraction system
patent, February 1994


Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking
patent, January 2000


Methods for Forming Wellbores in Heated Formations
patent-application, August 2009


Petroleum production method
patent, October 1980


System for temperature profile measurement in large furnances and kilns and method therefor
patent, August 1988


Thermal processing of a hydrocarbon containing formation to increase a permeability of the formation
patent, October 2005


Oil well heater cable
patent, July 1998


Start-up of temperature limited heaters using direct current (DC)
patent-application, December 2005


Self-regulating porous heating device
patent, December 1991


Controlled downhole chemical injection
patent, January 2006


Conversion of coal to electricity
patent, October 1985


Molten Salt as a Heat Transfer Fluid for Heating a Subsurface Formation
patent-application, April 2009


In situ retorting of oil shale
patent, October 1982


Method of imaging the atomic number of a sample
patent, February 1986


Production from Multiple Zones of a Tar Sands Formation
patent-application, April 2009


Process for recovering methane and/or sequestering fluids
patent, July 2002


Heating system for rathole oil well
patent, April 1989


Heat treatment with an autoregulating heater
patent, November 1986


In situ recovery from a hydrocarbon containing formation using one or more simulations
patent-application, October 2003


Two string drilling system using coil tubing
patent, February 2005


Thermal recovery of hydrocarbon from tar sands
patent, February 1977


Apparatus and process for the recovery of oil
patent, April 1984


Heavy oil recovery process
patent, November 1987


In situ thermal processing of a coal formation to produce a selected gas mixture
patent-application, March 2002


In situ recovery of oil from oil shale
patent, April 1984


Corrugated spiral membrane module
patent, October 1995


Heat injection process and apparatus
patent, April 1995


Alternate energy source usage for in situ heat treatment processes
patent-application, July 2008


Method for drilling a borehole from one cased borehole to another cased borehole
patent, July 1996


In Situ thermal processing of a coal formation to produce a condensate
patent, August 2003


In situ production of synthesis gas from a hydrocarbon containing formation through a heat source wellbore
patent, April 2004


In situ thermal processing of a hydrocarbon containing formation to produce nitrogen containing formation fluids
patent, April 2004


Methods for isolating a water table and for soil remediation
patent, July 1995


Slurry hydroprocessing for heavy oil upgrading using supported slurry catalysts
patent-application, August 2002


Pro-ecological mining system
patent-application, July 2003


Removable heat sources for in situ thermal processing of an oil shale formation
patent-application, August 2003


In situ thermal processing of a coal formation using heat sources positioned within open wellbores
patent, June 2004


In situ thermal processing of an oil shale formation using a pattern of heat sources
patent, January 2006


In situ thermal processing of a coal formation using a movable heating element
patent, August 2006


EMAT probe and technique for weld inspection
patent, June 1998


In situ recovery from a hydrocarbon containing formation using barriers
patent, July 2006


In situ thermal processing of an oil reservoir formation
patent, July 2006


Power sources for downhole electrical heating
patent, March 1992


Temperature limited heaters with high power factors
patent-application, December 2005


Medium-load power-generating plant with integrated coal gasification plant
patent, September 1986


Heating of solid earthen material, measuring moisture and resistivity
patent, August 1996


In situ thermal processing of a hydrocarbon containing formation to produce hydrocarbon fluids and synthesis gas
patent, October 2004


Gas and oil production
patent, October 2004


Retorting and Combustion Processes in Surface Oil-Shale Retorts
journal, November 1981


In situ thermal processing of a hydrocarbon containing formation with carbon dioxide sequestration
patent, March 2005


In situ thermal processing of a coal formation with heat sources located at an edge of a coal layer
patent, August 2006


In situ thermal processing of a relatively permeable formation while controlling pressure
patent, August 2006


Method of recovery of natural gases from underground coal formations
patent, July 1994


Oil recovery optimization using a well having both horizontal and vertical sections
patent, August 1994


The Characteristics of a Low Temperature In Situ Shale Oil
conference, April 2013


In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations
patent, February 1980


In situ thermal processing of an oil shale formation using a pattern of heat sources
patent-application, September 2006


Upgrading and mining of coal
patent, November 2005


In-situ gasification of tar sands utilizing a combustible gas
patent, March 1986


Logging while drilling borehole imaging and dipmeter device
patent, May 1999


Process for in situ coal gasification
patent, April 1980


Substoichiometric combustion of low heating value gases
patent, January 1983


System and process for secondary hydrocarbon recovery
patent, October 2002


System for transmitting ultrasonic energy through core samples
patent, April 1983


Creating and maintaining a gas cap in tar sands formations
patent-application, January 2009


Situ coal combustion heat recovery method
patent, May 1978


In situ thermal processing of a heavy oil diatomite formation
patent, September 2006


Self-regulating heater employing reactive components
patent, July 1989


Some Effects of Pressure on Oil-Shale Retorting
journal, September 1969


System and method for subterranean access
patent-application, February 2004


Method for producing low permeability reservoirs using steam
patent, May 1995


Method for recovering contaminants from soil utilizing electrical heating
patent, August 1997


Oil stabilization
patent, October 1991


Method of monitoring a heater for faults
patent, October 1987


Insulated and/or concentric coiled tubing
patent, January 2000


Process for hydrotreating metal-contaminated hydrocarbonaceous feedstock
patent, April 1998


Triaxial temperature limited heater
patent, May 2008


Direct Production of Low Pour Point High Gravity Shale Oil
journal, March 1967


Hydrogenation catalyst and process
patent, February 1995


Gas fired radiant tube heater
patent, January 1992


In-situ tuned microwave oil extraction process
patent, January 1992


In situ thermal processing of a hydrocarbon containing formation and ammonia production
patent, May 2004


Electrode well and method of completion
patent, February 1987


In-situ steam drive oil recovery process
patent, February 1987


Method for determining capillary pressure and relative permeability by imaging
patent, January 1990


Process for manufacturing improved process oils using extraction of hydrotreated distillates
patent, August 2000


In situ thermal processing of a coal formation leaving one or more selected unprocessed areas
patent, March 2004


In situ thermal processing of a coal formation using a controlled heating rate
patent, June 2004


NMR imaging of materials for transport properties
patent, January 1988


Apparatus for analysis of failure of material
patent, August 1989


Method and apparatus for providing multiple autoregulated temperatures
patent, June 1999


Forming openings in a hydrocarbon containing formation using magnetic tracking
patent, January 2006


Heat injection process
patent, May 1995


In situ thermal processing of a tar sands formation
patent, June 2006


Oil recovery by enhanced imbitition in low permeability reservoirs
patent, May 1995


In situ recovery from lean and rich zones in a hydrocarbon containing formation
patent, June 2006


In situ thermal processing of a coal formation using a relatively slow heating rate
patent, March 2004


Temperature Measuring Device
patent, July 1971


Temperature limited heaters using phase transformation of ferromagnetic material
patent-application, February 2008


In situ production of synthesis gas from a coal formation, the synthesis gas having a selected H2 to CO ratio
patent, April 2005


Fiber optic linked flame sensor
patent, October 1998


Use of downhole high pressure gas in a gas-lift well and associated methods
patent, December 2006


In situ thermal processing of an oil shale formation to produce a desired product
patent, April 2005


In situ thermal processing of a hydrocarbon containing formation and upgrading of produced fluids prior to further treatment
patent-application, October 2003


In Situ Recovery from Residually Heated Sections in a Hydrocarbon Containing Formation
patent-application, April 2009


Substoichiometric combustion of low heating value gases
patent, May 1983


In situ soil decontamination method and apparatus
patent, April 1991


Process for producing methanol
patent, July 1981


Thermal processes for subsurface formations
patent-application, June 2007


Process for recovering products from oil shale
patent, April 1982


NMR logging of natural gas reservoirs
patent, July 2000


In situ thermal processing of a relatively impermeable formation to increase permeability of the formation
patent, August 2004


Method for in situ coal gasification operations
patent, December 1981


Robust electrical heating systems for mineral wells
patent, December 1991


Crystalline Zeolite ZSM-5 and Method of Preparing the Same
patent, November 1972


Hydrocarbon stratum retorting means and method
patent, June 1986


Conduction heating of hydrocarbonaceous formations
patent, October 1985


Metal oversheathed electrical resistance heater
patent, December 1986


In situ thermal processing of a coal formation by controlling a pressure of the formation
patent, April 2004


In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
patent, June 2005


Heating Systems for Heating Subsurface Formations
patent-application, April 2009


Varying Properties of In Situ Heat Treatment of a Tar Sands Formation Based on Assessed Viscosities
patent-application, April 2009


Flameless combustor
patent, January 1999


Temperature limited heaters using modulated DC power
patent-application, December 2005


Drilling Subsurface Wellbores with Cutting Structures
patent-application, March 2009


Multiple-site underground magnetic heating of hydrocarbons
patent, August 1982


In situ thermal processing of a coal formation using a distributed combustor
patent, April 2004


In situ thermal processing of a coal formation with a selected oxygen content and/or selected O/C ratio
patent, April 2004


Continuous Subsurface Heater Temperature Measurement
patent-application, July 2009


Method of completing an uncased section of a borehole
patent, November 1994


In situ thermal processing of hydrocarbons within a relatively permeable formation
patent, April 2004


Systems and methods for hydrocarbon recovery
patent, January 2001


Switch controlled, zone-type heating cable and method
patent, April 1996


In situ thermal processing of a hydrocarbon containing formation leaving one or more selected unprocessed areas
patent, April 2004


Live well heater cable
patent, July 2003


Method of underground fuel gasification
patent, April 1984


Solution Mining and In Situ Treatment of Nahcolite Beds
patent-application, August 2009


Method and system to locate leaks in subsurface containment structures using tracer gases
patent, March 2000


In situ conversion process utilizing a closed loop heating system
patent, August 2009


Method and apparatus for treatment of subsurface formations
patent, October 1984


Low temperature monitoring system for subsurface barriers
patent, August 2009


Extraction from underground coal deposits
patent, August 1977


Inhibiting reflux in a heated well of an in situ conversion system
patent-application, December 2005


Wire and cable
patent, May 1993


Treatment of gas from an in situ conversion process
patent-application, May 2007


Three magnet casing collar locator
patent, February 1989


Treatment of underground beds
patent, April 1984


Method for monitoring a heater
patent, November 1988


Hydrotreating process using sulfur activated non-calcined catalyst
patent, September 2001


Installation and use of removable heaters in a hydrocarbon containing formation
patent, January 2007


Oil well casting electrical power pick-off points
patent, January 2007


In situ thermal processing of a hydrocarbon containing formation producing a mixture with oxygenated hydrocarbons
patent-application, June 2002


Surface heating blanket for soil remediation
patent, July 1993


Electrical Heating With Horizontal Wells, The Heat Transfer Problem
conference, April 2013


The Thermal and Structural Properties of a Hanna Basin Coal
journal, June 1984


In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
patent, October 2006


Temperature limited heaters with thermally conductive fluid used to heat subsurface formations
patent-application, December 2005


High power self-regulating heater
patent, March 1989


High resolution tomographic imaging method
patent, January 1987


In situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation
patent, April 2006


In situ thermal processing of an oil shale formation in a reducing environment
patent, July 2005


Systems and methods for producing hydrocarbons from tar sands formations
patent-application, June 2007


Remediation method
patent, December 1999


In situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range
patent, July 2005


Method for production of hydrocarbons from organic-rich rock
patent, July 2005


Gas injection to inhibit migration during an in situ heat treatment process
patent-application, September 2008


Heating Subsurface Formations by Oxidizing Fuel on a Fuel Carrier
patent-application, August 2009


In situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore
patent, November 2005


Low temperature barriers with heat interceptor wells for in situ processes
patent-application, March 2007


Method for initiating an in-situ recovery process by the introduction of oxygen
patent, August 1977


An Analog Computer for Studying Heat Transfer During a Thermal Recovery Process
journal, December 1955


In situ thermal processing of an oil shale formation with a selected property
patent, February 2006


In situ thermal processing of a hydrocarbon containing formation with a selected hydrogen to carbon ratio
patent, February 2006