Patent•
Heat generating pipe
30 Mar 1967-
TL;DR: A heat-generating pipe arrangement employs at least one pipe of ferromagnetic metal, an insulated electric conductor line connected to a source of AC supply and inserted within the pipe throughout the entire length thereof and a good heat-conductive material such as water, sea water or the like which exists in the clearance space between the conductor line and the pipe as discussed by the authors.
Abstract: A heat-generating pipe arrangement employs at least one pipe of ferromagnetic metal, an insulated electric conductor line connected to a source of AC supply and inserted within the pipe throughout the entire length thereof and a good heat-conductive material such as water, sea water or the like which exists in the clearance space between the conductor line and the pipe. The pipe is heated by the alternating current flowing through the inner wall portion thereof on account of the skin effect, which is a return current from the conductor line to the source of AC. The heat-conductive material is effective in preventing the temperature rise of insulating-material covering the conductor line and reduces the cost of heat-generating pipe per unit of heat generation.
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Patent•
23 Apr 2004TL;DR: A process may include providing heat from one or more heaters to at least a portion of a subsurface formation as discussed by the authors, which is referred to as pyrolyzing.
Abstract: 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 embodiments, heat from the one or more heat sources may pyrolyze at least some hydrocarbons in a part of a subsurface formation. Hydrocarbons and/or other products may be produced from a subsurface formation. Certain embodiments describe apparatus, methods, and/or processes used in treating a subsurface or hydrocarbon containing formation.
333 citations
Patent•
06 Apr 2012
TL;DR: In this paper, a thermal surgical tool comprising a conductor having a ferromagnetic material attached thereto is provided, which can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.
Abstract: A thermal surgical tool comprising a conductor having a ferromagnetic material attached thereto is provided. The conductor may include a support of sufficiently high Young's modulus to resist bending when the surgical tool is being used to treat tissue. One or more intervening layers may be disposed between the support and the ferromagnetic material. Each of the intervening layers may be selected for a property that facilitates construction of the surgical tool and/or enhances a functionality of the surgical tool. The thermal surgical tool can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.
330 citations
Patent•
14 Mar 2013
TL;DR: In this article, a power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region.
Abstract: A power source delivers oscillating electrical energy to an electrical conductor, such as a wire or catheter, which is coated circumferentially with a ferromagnetic material in a selected region. With high frequency electrical energy, the ferromagnetic material has a quick response in heating and cooling adjustable by the controllable power delivery. The ferromagnetic material can be used for separating tissue, coagulation, tissue destruction or achieving other desired tissue effects in numerous surgical procedures.
319 citations
Patent•
05 Jun 1997
TL;DR: In this paper, a resistively heated thermally cutting and coagulating surgical instrument with bipolar output ports and a bipolar cable is presented, where the temperature is maintained at a value restricted to a temperature below curie temperature.
Abstract: A resistively heated thermally cutting and coagulating surgical instrument which may be employed with a conventional electrosurgical generator having bipolar output ports and a bipolar cable. The instrument utilizes a heating element which is heated to a predetermined upper temperature limit while in still air under a starting condition. Under this condition, heat dissipation by radiation, convection, and conduction through the instrument itself provides a high temperature end form of regulation. Under a subsequent working condition wherein the heated component or element is in contact with the tissue, heat dissipation is by thermal conduction both into the tissue and through the thermally conductive components of the instrument. A preferred heating element is formed with a ferromagnetic material which, when at the upper limit temperature is maintained at a value restricted to a temperature below curie temperature and which does not invoke surface oxidation or scaling within the time interval of heating experienced in the starting condition. However, the temperature is high enough to sustain a temperature effective for cutting and coagulation when in the working condition. A handle is employed which contains impedance matching circuit components. In one embodiment, the heating component of the instrument incorporates an integrally formed probe which is retained at lower temperatures through the use of a current restricting neck.
286 citations
Patent•
24 Apr 2001TL;DR: In this paper, an in situ process for treating a hydrocarbon containing formation is provided, which includes providing heat from one or more heaters to at least a portion of the formation.
Abstract: An in situ process for treating a hydrocarbon containing 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 to transfer from the one or more heaters to a part of the formation such that heat from the one or more heat sources pyrolyzes at least some hydrocarbons within the part. Hydrocarbons may be produced from the formation.
282 citations
References
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Patent•
28 Mar 1966
165 citations
Patent•
07 Nov 1963
47 citations
Patent•
08 Jun 1934
TL;DR: In this article, an improvement in underground high tension electric cables of the type disclosed in Patent No. 2,015,063, dated September 24, 1935, was proposed, which is a division of my copending application Serial No. 720,734, filed April 16, 1934.
Abstract: This invention is directed to an improvement in underground high tension electric cables of the type disclosed in Patent No. 2,015,063, dated September 24, 1935. The present application is a division of my copending application Serial No. 720,734, filed April 16, 1934. In the patent above...
41 citations