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Scientific American ; Jan. 2 edition, 1909
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| Number | Title | Issue Date |
| 7311151 | Substantially neutrally buoyant and positively buoyant electrically heated flowlines for production of subsea hydrocarbons A flowline is described for producing hydrocarbons from a subsea well that is comprised of a substantially neutrally buoyant tubular composite umbilical. The flowline may possess electrical heating apparatus within the tubular walls of the tubular composite umbilica... | 12/25/2007 |
| 7260320 | Electric heat tracing Heat tracing of an elongate, thermally-insulated substrate is effected by means of one or more elongate, constant wattage electric heaters mounted in thermal contact therewith beneath the thermal insulation. A metal conduit is mounted on the substrate and extends aw... | 08/21/2007 |
| 7239781 | Composite fiber radial compression members in an umbilical The present inventions relate generally to umbilicals comprising at least one inner tube and at least one composite fiber element to provide greater resistance to radial compressive forces. Such umbilicals may be used in subsea hydrocarbon production applications. | 07/03/2007 |
| 7227108 | Dispenser assemblies and systems including a heat storage unit A heat storage unit (2) includes a body having a passage (12) formed therein through which a flowable product passes. A heatable element (10) is incorporated within the body of the heat storage unit (2) in thermal communication with the p... | 06/05/2007 |
| 7208707 | Dispenser assemblies and systems including a heat storage unit A heat storage unit (2) includes a body having a passage (12) formed therein through which a flowable product passes. A heatable element (10) is incorporated within the body of the heat storage unit (2) in thermal communication with the p... | 04/24/2007 |
| 7203419 | Heated conduit A conduit comprising a pipe, an electrical heater extending along the length of the pipe, and a thermally insulating jacket extending around the pipe and heater. The pipe comprises a plastic inner tube. The plastic inner tube is received within a deformable metal tu... | 04/10/2007 |
| 7128156 | Wellbore rig with heat transfer loop apparatus A rig, the rig useful in well operations, the rig having rig structure above the earth, and heat transfer loop apparatus connected to the rig for supplying heat transfer fluid for use on the rig, either from a loop or loops with portion(s) in water or portion(s) in ... | 10/31/2006 |
| 7069640 | Method of making an inductor coil unit including steps of pouring resin between frames, and said coil unit A method of manufacturing a coil unit includes the first step of disposing a coil between a first frame and a second frame, the second step of pouring liquid resin into between the first frame and the second frame with the coil disposed therebetween, and the third s... | 07/04/2006 |
| 6939082 | Subea pipeline blockage remediation method The method of taking a remotely operated vehicle to the ocean floor to land on and move along a subsea pipeline above or below the seafloor and repeatedly circulate seawater which has been heated electrically, mechanically, or chemically across the outer surface of ... | 09/06/2005 |
| 6937030 | Testing electrical integrity of electrically heated subsea pipelines Method is provided for testing electrically heated subsea pipelines that are “electrical-ready,” that is, equipped for applying electrical power when it is needed for heating the pipeline at any time during the life of the pipeline. Time domain reflectometer app... | 08/30/2005 |
| 6707012 | Power supply for electrically heated subsea pipeline A power supply system for electrically heated pipelines is provided. A variable frequency drive supplies power to the pipeline from an external source of electrical power. An isolation transformer and a contactor or isolating switch may be used between the variable ... | 03/16/2004 |
| 6617556 | Method and apparatus for heating a submarine pipeline A novel system for inductively heating a fluid conduit using an electrical cable located proximate the fluid conduit. Electricity is conducted to the cable in either a powering mode, in which a powered system is electrically coupled to the cable and subst... | 09/09/2003 |
| 6556780 | Heated flowline umbilical The present invention relates to an offshore installation including an oil/gas flowline umbilical installed between a platform--or a shore installation--and a sea bed based template and including an insulated electrical cable conductor connected in series... | 04/29/2003 |
| 6441343 | Heating system for structures Low voltage, high current electrical energy is supplied in a closed conductive loop. Preferably, the current is induced into the loop by a transformer. The loop has, at least in part, one, or a series of, conductive elements of a structure to be warmed. T... | 08/27/2002 |
| 6371693 | Making subsea pipelines ready for electrical heating Apparatus and method are provided for connecting electrical power for heating subsea pipelines after the pipeline is deployed. Electrical connections may be made subsea using wet-mateable connectors. The electrical power may be supplied from a boat or may... | 04/16/2002 |
| 6310334 | Surface current heating apparatus having spaced-apart hollow heat generating members with conductor extending therethrough A surface current heating apparatus including a plurality of hollow heat generating members each of which is made of a ferromagnetic material and has a through-hole and which are spaced apart from each other so as to provide an array of the hollow heat ge... | 10/30/2001 |
| 6292627 | Electrical heating of pipelines with pipe-in-pipe and mid-line connector Apparatus and method for electrically heating a segment of a subsea pipeline are provided. Electrical power may be supplied about midpoint between the ends of concentric pipes. The annulus between the pipes electrically isolates the pipes, but at the ends... | 09/18/2001 |
| 6049657 | Marine pipeline heated with alternating current A marine pipeline comprising (a) pipe, (b) a coating that electrically insulates the pipe from sea water, and (c) an alternating current heating circuit comprising the pipe in series with ambient sea water, wherein the heat generated by alternating curren... | 04/11/2000 |
| 5390961 | Dual wall thermally insulated conduit including skin effect heat tracing pipes A dual wall thermally insulated conduit which is heat traced using skin effect pipes. A plurality of equally spaced skin effect pipes run longitudinally with the conduit and are located adjacent and external to the carrier or process pipe in the annular c... | 02/21/1995 |
| 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 which is intercalated in the fluid-carrying pipeline. Simult... | 01/26/1993 |
| 5126037 | Geopreater heating method and apparatus A separate heat source, such an a skin effect heater, is added to a subterranean heat exchanger and oxygen combustion device for upgrading viscous crude oil feeds. An insulated wire is integrated with combustion oxygen supply piping to form the skin effec... | 06/30/1992 |
| 5073625 | Self-regulating porous heating device A self-regulating porous heater regulates the temperature of fluid passing through it. This device includes at least one layer of a porous material which has a magnetic permeability inversely related to temperature over a given range. Due to conductor ski... | 12/17/1991 |
| 4704515 | Method for supplying electrical power to proximity-effect heat-tracing circuits A method for reducing voltages required by in-place proximity-effect circuits includes providing uninsulated conductors which extend from a main transformer station to remote feed-node locations for connection to insulated conductors within a heat-tracing... | 11/03/1987 |
| 4650971 | Energization indicator and method for heat trace cable and the like An optical indicator apparatus includes an optical output device for producing a light output in response to an electrical input thereto, a hollow housing for supporting the optical output device relative to another device to permit viewing of light outpu... | 03/17/1987 |
| 4645906 | Reduced resistance skin effect heat generating system A skin effect heat generating pipe for use with a low frequency alternating current source includes a ferromagnetic pipe (e.g., steel) having thickness substantially greater than the penetration depth of the current of the frequency of the power source. A... | 02/24/1987 |
| 4617449 | Heating device for utilizing the skin effect of alternating current An improved power cable for a heating system that utilizes the skin effect of alternating current, and a method and apparatus for joining lengths of the improved cable. In one embodiment, the cable includes a stranded copper conductor (20) surrounded by a... | 10/14/1986 |
| 4578564 | Series-connected, skin-current heating pipe including current trouble detector A series-connected, skin-current heating pipe circuit includes a first ferromagnetic pipe; a first insulated wire extending along and inside the first pipe; a first AC source connected to one end of each of the first pipe and first wire; and an impedance ... | 03/25/1986 |
| 4571487 | Methods and apparatus for supplying electrical power for proximity effect heat-tracing A proximity effect heat-tracing system in which proximity effect heat-tracing circuits are fed in either direction from a plurality of feed points connected to a single main transformer to increase the length of pipeline supplied by a single main transfor... | 02/18/1986 |
| 4564747 | Methods and apparatus for detecting abnormalities in proximity effect heat-tracing circuits Methods and apparatus for detecting abnormalities in proximity effect pipeline tracing circuits by coupling conductive elements carrying proximity effect circuit currents and having opposite polarities. These conductive elements are coupled to an addition... | 01/14/1986 |
| 4532375 | Heating device for utilizing the skin effect of alternating current An improved power cable for a heating system that utilizes the skin effect of alternating current, and a method and apparatus for joining lengths of the improved cable. In one embodiment, the cable includes a stranded copper conductor (20) surrounded by a... | 07/30/1985 |
| 4472621 | Separable junction for electrical skin-effect pipeline heating system A separable junction for an electric pipeline system of the type including a tracer for skin-effect heating, which tracer comprises an insulated conductor within an electrically conductive conduit, incorporates flanges at the ends of the pipe section to b... | 09/18/1984 |
| 4456186 | Electrically heated reactor for high temperature and pressure chemical reactions An electrically heated reactor for high temperature and pressure chemical reactions includes a reactor vessel having an inlet opening for introduction of raw material onto the reactor and an outlet opening for removal of heated material from the reactor. ... | 06/26/1984 |
| 4436565 | Method of making a heating device for utilizing the skin effect of alternating current An improved power cable for a heating system that utilizes the skin effect of alternating current, and a method and apparatus for joining lengths of the improved cable. Lengths of the improved cable are joined by first removing predetermined portions of t... | 03/13/1984 |
| 4408117 | Impedance heating system with skin effect particularly for railroad tank cars An impedance skin effect heating system for tanks or vessels containing a liquid includes a heating unit having a rigid outer pipe conductor mounted through an opening in the tank and extending therein, to be immersed in the liquid and a rigid central con... | 10/04/1983 |
| 4386650 | Temperature control system A temperature control system is disclosed which supplies a fluid which acts as a temperature effecting agent for the system. The fluid is conveyed through the system with a temperature control means regulating the temperature of the fluid and a fluid cont... | 06/07/1983 |
| 4366356 | Compact induced current heat-generating pipe A compact induced heat-generating pipe useful for shorter bodies to be heated, such as small scale pipelines, the heat-generating pipe consisting of at least one set of two or three ferromagnetic pipes and an insulated wire passing therethrough and connec... | 12/28/1982 |
| 4345142 | Directly heatable semiconductor tubular bodies Directly heatable tubular semiconductor bodies are produced by pyrolytically depositing a continuous layer of silicon or silicon carbide from a thermally decomposable silicon compound onto a heated graphite mandrel, non-destructively removing the so-depos... | 08/17/1982 |
| 4334142 | Skin effect pipe heating system utilizing convective and conductive heat transfer Faster and more efficient heat transmission between an electrical skin effect current heat generating unit and the surface of a pipe to be heated is achieved by utilizing convective as well as conductive transfer of heat therebetween. The unit includes an... | 06/08/1982 |
| 4308636 | Method and apparatus for heating a fluid Method and apparatus for heating a fluid, such as water, for any of several purposes, such as for use with carpet cleaning apparatus; and charcterized by supplying electrical current periodically to the primary of a conductive coil, thereby building and c... | 01/05/1982 |
| 4303826 | Shielded skin-effect current heated pipeline A pipeline to be laid over a very long distance e.g. 100 km, and heated by skin-effect-current, and used underground or on the seabed by employing an electric source frequency lower than commercial ones, is provided. The pipeline consists of a fluid-trans... | 12/01/1981 |
