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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...
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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...
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7490665 |
Variable frequency temperature limited heaters
Certain embodiments provide a heating system configured to heat at least a part of a subsurface formation. The system includes an electrical power supply. A heater section includes one or more...
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7481274 |
Temperature limited heaters with relatively constant current
Certain embodiments provide a system configured to heat a subsurface formation. The system includes an electrical power supply. A heater section includes one or more electrical conductors...
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7431076 |
Temperature limited heaters using modulated DC power
The invention provides a system configured to heat at least a part of a subsurface formation. The system includes: an electrical power supply configured to provide modulated direct current (DC);...
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7398823 |
Selective electromagnetic production tool
A method for resistively heating a subterranean region to lower the viscosity of heavy oil by using production tubing coupled to at least two electrodes modified for three-phase flow and an...
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7165615 |
In situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden
In an embodiment, a system may be used to heat a hydrocarbon containing formation. The system may include a conduit placed within an opening in the formation. A conductor may be placed within the...
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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...
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6912354 |
Concentric electrode DC arc systems and their use in processing waste materials
An electrode assembly comprising concentric tubular electrodes is provided for high temperature processing of materials. The electrode assembly is connected with a power supply that includes...
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6631761 |
Wet electric heating process
A wet electric heating (“WEH”) process involves establishing electrode zones (“e-zones”) around conductors (e.g., wells) for distributing electric current and thereby generating and...
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6260615 |
Method and apparatus for de-icing oilwells
A power cable for an ESP is used also for heating well bores in cold climates. An electrical switch is located within a wellbore at a selected location in the power cable. The electrical switch is...
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5974226 |
Heated power cable
A heated power cable for oil wells providing controllable, variable power output and heater redundancy. Heating elements are electrically and thermally insulated within the same armor in a manner...
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5907662 |
Electrode wells for powerline-frequency electrical heating of soils
An electrode well for use in powerline-frequency heating of soils for decontamination of the soil. Heating of soils enables the removal of volatile organic compounds from soil when utilized in...
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5649786 |
Apparatus for down hole fusing
The present invention is directed to a method for making service connection to polyethylene replacement sewer pipe. Specifically, the method involves the steps of (1) locating the service; (2)...
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5621844 |
Electrical heating of mineral well deposits using downhole impedance transformation networks
A.C. electrical heating system for heating a fluid reservoir (deposit) in the vicinity of a mineral fluid well, usually an oil well, utilizes A.C. electrical power in a range of 25 Hz to 30 KHz....
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5586213 |
Ionic contact media for electrodes and soil in conduction heating
Ionic contact is established and maintained between electrodes and soil in ohmic heating of a subsurface formation for recovery of volatile and semi-volatile materials, such as hazardous waste,...
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5517593 |
Control system for well stimulation apparatus with response time temperature rise used in determining heater control temperature setpoint
A control system for well stimulation equipment including a source of electrical power, a source of injection fluid, a fluid injection system, and a downhole electrical heater, electrically...
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5400430 |
Method for injection well stimulation
A method of stimulating injection wells having a wellbore. The method includes the steps of placing a heater at or near the bottom of the well, adjacent to the area to be treated, energizing the...
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5282263 |
Method of stumulating oil wells by pumped solvent heated in situ to reduce wax obstructions
A method of stimulating production from an oil well by removing solid wax deposits from a production zone an electrical resistance heater comprised of a packed bed of spherical heating elements...
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5182792 |
Process of electric pipeline heating utilizing heating elements inserted in pipelines
A process to clear pipelines carrying fluids viscous and/or rich in organic residues includes the introduction of a heating element inside a pipeline carrying the fluids through a coupling spool...
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5120935 |
Method and apparatus for oil well stimulation utilizing electrically heated solvents
A method and apparatus of stimulating production from an oil well by removing solid wax deposits from a production zone, includes an electrical resistance heater comprised of a packed bed of...
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5070533 |
Robust electrical heating systems for mineral wells
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...
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5060287 |
Heater utilizing copper-nickel alloy core
An electrical resistance heater is provided which utilizes a copper-nickel alloy heating cable. This metallurgy heating cable is significantly less prone to failure due to localized overheating...
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4956535 |
Electrode systems for in situ vitrification
An electrode comprising a molybdenum rod is received within a conductive collar formed of graphite. The molybdenum rod and the graphite collar may be physically joined at the bottom. A pair of such...
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4882470 |
Boring device for opening passages to branch portions of a lined main pipe line
A boring device for a lining material in a branched portion of a lined pipe such as a gas-conduit or a city water pipe line to which the lining material has been applied, which device includes a...
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4793409 |
Method and apparatus for forming an insulated oil well casing
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...
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4790375 |
Mineral well heating systems
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...
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4718774 |
Scale monitoring means and method
The present invention is a system and method for determining the onset of scale in a pipeline carrying a petroleum liquid. A source provides electrical energy to a heating element in a housing...
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4716960 |
Method and system for introducing electric current into a well
An invention for supplying power to a well. In one embodiment power heats a tubing from adjacent the surface to a selected level to prevent the formation of solids. The tubing is heated by passing...
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4687420 |
Sonic pressure wave pump with liquid heating and elevating mechanism
A pump for heating high viscosity oil and elevating it to a ground level from a subterranean level. The pump, which is preferrably of the type which produces and is operated by sonic pressure waves...
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4570715 |
Formation-tailored method and apparatus for uniformly heating long subterranean intervals at high temperature
Long intervals of subterranean earth formations are heated at high temperatures for long times with an electrical heater containing spoolable, steel sheathed, mineral insulated cables which have...
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4378846 |
Enhanced oil recovery apparatus and method
Apparatus for heating hydrocarbons, and the like, in an underground reservoir for the purpose of lowering the viscosity of the substance in the reservoir and facilitating the flow thereof has a...
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4365506 |
Remotely operated downhole test disconnect switching apparatus
A remotely controlled switching apparatus for selectively controlling the connection of a downhole device to a power cable which carries power to a downhole motor includes a thermostatic switch...
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4359627 |
Preheater mounted within a well
A preheater is disclosed which can be inserted and withdrawn from a well tube defining a curved passage, without having its heating element damaged, by utilizing the flexibility of a spirally...
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4193448 |
Apparatus for recovery of petroleum from petroleum impregnated media
A method and apparatus for the recovery of petroleum from petroleum impregnated media. The apparatus includes a microwave generator and a guide for directing microwaves to a microwave dispersing...
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4008761 |
Method for induction heating of underground hydrocarbon deposits using a quasi-toroidal conductor envelope
A method of heating hydrocarbons in situ in an underground hydrocarbon deposit such as bituminous sands or oil shale. A selected part of the deposit is heated by electrical induction coils arranged...
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3824364 |
APPARATUS FOR HEATING A VISCOUS LIQUID
An open ended tubular heating unit is provided which is comprised of a stainless steel tube surrounded by an induction heating coil which is disposed in magnetically coupled relationship with the...
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3522846 |
METHOD AND APPARATUS FOR PRODUCTION AMPLIFICATION BY SPONTANEOUS EMISSION OF RADIATION
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3420301 |
APPARATUS FOR HEATING AND RECOVERING UNDERGROUND OIL
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3387657 |
Downhole ignitor
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3379256 |
Oil well ignition device
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3357505 |
High temperature rock drill
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3342267 |
Turbo-generator heater for oil and gas wells and pipe lines
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3133592 |
Apparatus for the application of electrical energy to subsurface formations
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3130287 |
Apparatus for simultaneously pumping and heating a fluid
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3101116 |
Bottom hole jet heater
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3069736 |
Method and apparatus to sterilize pump water as and when it is pumped
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3069735 |
Method and apparatus for sterilizing water
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3068339 |
Immersible electric heater
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3026940 |
Oil well temperature indicator and control
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