Matches 251 - 300 out of 385 < 1 2 3 4 5 6 7 8 >


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8224163 Variable frequency temperature limited heaters  
A heater system may include an alternating current supply and an electrical conductor. Alternating current may be applied to one or more electrical conductors at a frequency between about 100 Hz...
106
8238730 High voltage temperature limited heaters  
A heater system may include an alternating current supply and an electrical conductor. An alternating current may be applied to one or more electrical conductors at a voltage above about 200...
106
7073578 Staged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation  
A method for treating a hydrocarbon containing formation is described. The method for treating a hydrocarbon containing formation may include heating a first volume of the formation using a first...
106
7640980 Thermal processes for subsurface formations  
A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some...
106
7219734 Inhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation  
A method for treating a hydrocarbon containing formation is described. The method may include providing heat from one or more heaters to at least a portion of the formation. At least one heater...
106
8224164 Insulated conductor temperature limited heaters  
A heater may include an electrical conductor. Applying alternating current to the electrical conductor may resistively heat the electrical conductor. The electrical conductor may include an...
106
7121342 Thermal processes for subsurface formations  
A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some...
106
7942203 Thermal processes for subsurface formations  
A process may include providing heat from one or more heaters to at least a portion of a subsurface formation. Heat may transfer from one or more heaters to a part of a formation. In some...
106
7121341 Conductor-in-conduit temperature limited heaters  
A heater may include an electrical conductor. Applying alternating current to the electrical conductor may generate resistively heat the electrical conductor. The electrical conductor may include...
106
7040400 In situ thermal processing of a relatively impermeable formation using an open wellbore  
A method for treating a relatively low permeability formation containing heavy hydrocarbons in situ may include providing heat from one or more heat sources to a portion of the formation. The heat...
106
7562706 Systems and methods for producing hydrocarbons from tar sands formations  
A system for treating a tar sands formation is disclosed. A plurality of heaters are located in the formation. The heaters include at least partially horizontal heating sections at least partially...
105
6969123 Upgrading and mining of coal  
A method for treating a coal formation to alter properties of coal in the formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the...
104
US20120048544 Wellbore Mechanical Integrity For In Situ Pyrolysis  
A method of completing a wellbore in a subsurface formation is provided herein. The method principally has application to subsurface formations comprising organic-rich rock that is to be heated in...
102
US20130112403 Multiple Electrical Connections To Optimize Heating For In Situ Pyrolysis  
A method for heating a subsurface formation using electrical resistance heating is provided. The method includes placing a first electrically conductive proppant into a fracture within an interval...
102
US20120048545 Olefin Reduction For In Situ Pyrolysis Oil Generation  
Methods for improving the quality of hydrocarbon fluids produced by in situ pyrolysis or mobilization of organic-rich rock, such as oil shale, coal, or heavy oil, are provided. The methods involve...
102
7128153 Treatment of a hydrocarbon containing formation after heating  
A method for treating a hydrocarbon containing formation is provided. In one embodiment, heat from one or more heaters may be provided to at least a portion of the formation. Heat may be allowed...
101
8606091 Subsurface heaters with low sulfidation rates  
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...
101
7631689 Sulfur barrier for use with in situ processes for treating formations  
Methods for forming a barrier around at least a portion of a treatment area in a subsurface formation are described herein. Sulfur may be introduced into one or more wellbores located inside a...
101
7597147 Temperature limited heaters using phase transformation of ferromagnetic material  
Systems, methods, and heaters for treating a subsurface formation are described herein. Systems and methods for making heaters are described herein. At least one heater includes a ferromagnetic...
101
7673786 Welding shield for coupling heaters  
Systems for coupling end portions of two elongated heater portions and methods of using such systems to treat a subsurface formation are described herein. A system may include a holding system...
101
8192682 High strength alloys  
High strength metal alloys are described herein. At least one composition of a metal alloy includes chromium, nickel, copper, manganese, silicon, niobium, tungsten and iron. System, methods, and...
101
7793722 Non-ferromagnetic overburden casing  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one system for electrically insulating an overburden portion of a heater wellbore is described. The...
101
7785427 High strength alloys  
High strength metal alloys are described herein. At least one composition of a metal alloy includes chromium, nickel, copper, manganese, silicon, niobium, tungsten and iron. System, methods, and...
101
7610962 Sour gas injection for use with in situ heat treatment  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method for providing acidic gas to a subsurface formation is described herein. The method may...
101
7866385 Power systems utilizing the heat of produced formation fluid  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method includes treating a hydrocarbon containing formation. The method may include providing...
101
7683296 Adjusting alloy compositions for selected properties in temperature limited heaters  
Heaters for treating a subsurface formation are described herein. Such heaters can be obtained by using the systems and methods described herein. The heater includes a heater section including...
101
7533719 Wellhead with non-ferromagnetic materials  
Wellheads for coupling to a heater located in a wellbore in a subsurface formation are described herein. At least one wellhead may include a heater located in a wellbore in a subsurface formation;...
101
8151880 Methods of making transportation fuel  
A method for producing alkylated hydrocarbons is disclosed. Formation fluid is produced from a subsurface in situ heat treatment process. The formation fluid is separated to produce a liquid...
101
8083813 Methods of producing transportation fuel  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method for producing transportation fuel is described herein. The method for producing...
101
7559367 Temperature limited heater with a conduit substantially electrically isolated from the formation  
A system for heating a hydrocarbon containing formation is described. A conduit may be located in an opening in the formation. The conduit includes ferromagnetic material. An electrical conductor...
101
7635023 Time sequenced heating of multiple layers in a hydrocarbon containing formation  
A method for treating a hydrocarbon containing formation may include providing heat to a first hydrocarbon layer in the formation from a first heater located in an opening in the formation. The...
101
7912358 Alternate energy source usage for in situ heat treatment processes  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one system for providing power to one or more subsurface heaters is described herein. The system...
101
7604052 Compositions produced using an in situ heat treatment process  
Systems, methods, and heaters for treating a subsurface formation are described herein. At least one method for producing hydrocarbons from a subsurface formation includes providing heat to the...
98
7066254 In situ thermal processing of a tar sands formation  
An in situ process for treating a tar sands formation is provided. The process may include providing heat from one or more heaters to at least a portion of the formation. The heat may be allowed...
96
8662175 Varying properties of in situ heat treatment of a tar sands formation based on assessed viscosities  
A method for treating a tar sands formation includes providing heat to at least part of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. The heat is...
96
8172335 Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations  
A system for treating a subsurface hydrocarbon containing formation includes one or more shafts. A first substantially horizontal or inclined tunnel extends from one or more of the shafts. A...
96
7540324 Heating hydrocarbon containing formations in a checkerboard pattern staged process  
Method for treating a hydrocarbon containing formation are described herein. Methods may include providing heat to two or more first sections of the formation with one or more first heaters in two...
96
8240774 Solution mining and in situ treatment of nahcolite beds  
A method for treating a nahcolite containing subsurface formation includes solution mining a first nahcolite bed above a hydrocarbon containing layer using a plurality of first solution mining...
96
8177305 Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations  
A system for treating a subsurface hydrocarbon containing formation includes one or more shafts. At least two substantially horizontal or inclined tunnels extend from one or more of the shafts. A...
96
8555971 Treating tar sands formations with dolomite  
A method for treating a karsted formation containing heavy hydrocarbons and dolomite includes providing heat to at least part of one or more karsted layers in the formation from one or more...
96
8276661 Heating subsurface formations by oxidizing fuel on a fuel carrier  
A method of heating a portion of a subsurface formation includes drawing fuel on a fuel carrier through an opening formed in the formation. Oxidant is supplied to the fuel at one or more locations...
96
7730945 Using geothermal energy to heat a portion of a formation for an in situ heat treatment process  
Methods of using geothermal energy to treat subsurface formations are described herein. Methods for using geothermal energy to treat a subsurface treatment area containing or proximate to...
96
7677314 Method of condensing vaporized water in situ to treat tar sands formations  
Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the...
96
7841401 Gas injection to inhibit migration during an in situ heat treatment process  
Methods of treating a subsurface formation are described herein. Methods for treating a subsurface treatment area in a formation may include introducing a fluid into the formation from a plurality...
96
7866386 In situ oxidation of subsurface formations  
Methods and systems for treating a hydrocarbon containing formation described herein include providing heat to a first portion of the formation from a plurality of heaters in the first portion,...
96
9181780 Controlling and assessing pressure conditions during treatment of tar sands formations  
A method for treating a tar sands formation includes providing heat to at least part of a hydrocarbon layer in the tar sands formation from a plurality of heaters located in the formation. Heat is...
96
8146669 Multi-step heater deployment in a subsurface formation  
A method for installing a horizontal or inclined subsurface heater includes placing a heating section of a heater in a horizontal or inclined section of a wellbore with an installation tool. The...
96
8752904 Heated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations  
A system for treating a subsurface hydrocarbon containing formation includes one or more shafts. A first substantially horizontal or inclined tunnel extends from one or more of the shafts. A...
96
8146661 Cryogenic treatment of gas  
Systems and methods of treating a gas stream are described. A method of treating a gas stream includes cryogenically separating a first gas stream to form a second gas stream and a third stream....
96
7730946 Treating tar sands formations with dolomite  
Methods for treating a tar sands formation are described herein. The tar sands formation may include dolomite and hydrocarbons. Methods may include providing heat at less than the decomposition...
96


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