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| Number | Title | Issue Date |
| 7686344 | Current insulation system for fluid systems An electrical insulation system for a linear element forming part of a fluid system subjected to risks of possible external electrical discharges, such as an aircraft fuel system, using an insulating insert (12) between two parts (14, 16) of said linea... | 03/30/2010 |
| 7344161 | Connection of internally lined pipelines An insert for use in connecting two lengths of pipe, each having a plastic liner. The insert consists of an inner tubular member of plastics material for connection at either end to the plastic liners of two pipe lengths, an insulating sleeve surrounding a central p... | 03/18/2008 |
| 7326015 | Electrically insulated wedge thread connection An electrically-insulative threaded connection includes a pin member having a pin thread and a box member having a box thread. An insulating composite layer is disposed between the pin thread and the box thread. The insulating composite layer includes an insulating ... | 02/05/2008 |
| 7267375 | Duct coupler apparatus An apparatus for joining ends of a pair of ducts together in end-to-end relationship has a collar with a first end portion and a second end portion, a first coupler element translatably secured to an exterior of the collar for moving the first end portion between fi... | 09/11/2007 |
| 7252160 | Electromagnetic gap sub assembly A compact, robust, wear resistant, and high performance electrically insulating gap sub for use with borehole EM Telemetry is disclosed. In one embodiment, the gap sub may include an externally threaded mandrel separated from an internally threaded housing by a diel... | 08/07/2007 |
| 7219727 | Wear resistant tubular connection A wear resistant casing connection including a wear resistant portion on its exterior surface is taught. A casing connection having a controlled bend angle is also taught. ... | 05/22/2007 |
| 7207603 | Insulated tubular assembly A tubular assembly 10 is disclosed for passing fluids within a hydrocarbon recovery well. The tubular assembly 10 has an insulated connection 12 between insulated tubing segments 14, 16. Tubing segments 14, 16 are connected via a t... | 04/24/2007 |
| 7156425 | Quick connect and quick disconnect plumbing apparatus A plumbing apparatus for connecting a tankless hot water heater to a cold water supply line and a hot water outlet line includes a union and a tee that are interconnected to one another. A first connector at one end of the union is provided for connecting the union ... | 01/02/2007 |
| 7125053 | Pre-expanded connector for expandable downhole tubulars A method and apparatus for providing an expandable threaded connection between segments of expandable tubulars. Threaded connections are machined into pre-expanded ends of tubulars. Once the threaded connections are machined into the pre-expanded ends, two joints of... | 10/24/2006 |
| 7066495 | Exhaust bellows for dynamic torsion control in an exhaust system A flexible bellows tube connecting pipes in a system such as a vehicle exhaust system. Various embodiments are disclosed, with each including two conduit sections having mating corrugations that overlap to provide a seal while allowing the two sections to rotate in ... | 06/27/2006 |
| 7032930 | Electrical isolation connector subassembly for use in directional drilling An electrical isolation connector subassembly for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations, the connector comprising an electrically insulative sleeve being sandwiched between two electrically i... | 04/25/2006 |
| 7025360 | Metal seal with corrosion resistant alloy overlay A composite metal sealing ring and method are provided for sealing between tubular members. First and second tubular members have first and second conical inner sealing surfaces. A metal sealing ring has corrosion-resistant inlays defining opposing conical outer sea... | 04/11/2006 |
| 7022165 | Tubular hydrogen permeable metal foil membrane and method of fabrication A tubular hydrogen permeable metal membrane and fabrication process comprises obtaining a metal alloy foil having two surfaces, coating the surfaces with a metal or metal alloy catalytic layer to produce a hydrogen permeable metal membrane, sizing the membrane into ... | 04/04/2006 |
| 7007982 | Tube fitting A tube fitting capable of absorbing vibration and shock resulting from a high pressure fluid passing through the tube fitting while it is used includes a connection head, a connection nipple, and an intermediate connection member. The connection head and the connect... | 03/07/2006 |
| 6929265 | Moisture seal for an F-Type connector The invention provides a method for moisture sealing the interface between a nut on the leading end of a male F-Type connector and the threaded tubular shaft of the female F connector. The male connector is attached to a coaxial cable and the female is mounted to an... | 08/16/2005 |
| 6572152 | Subassembly electrical isolation connector for drill rod In a subassembly electrical isolation connector for interconnecting sections of a tubular drill rod, the subassembly having an electrically insulated connector for and between spaced-apart connector sections to transmit drilling forces therethrough, the u... | 06/03/2003 |
| 6443499 | Apparatus for pre-conditioned air hoses and a method of assembling pre-conditioned air hoses The present invention provides an apparatus for pre-conditioned air (PCA) hoses and an assembly for a plurality of PCA hoses. The present invention further provides a method of assembling a plurality of PCA hoses. A hose in the assembly has an outer vinyl... | 09/03/2002 |
| 6349976 | Pipe in pipe assembly A pipe in pipe assembly. A coupling is used to join the ends of the inner pipe. The inner pipe is centralized within the inner pipe to provide axial resistance but minimum restraint transverse to the axis of the assembly. This provides sufficient flexibil... | 02/26/2002 |
| 6299214 | Isolation device and fluid connection An annular isolator is provided having a metal tube which acts as a spring while defining a flow path and a resilient member located between two loading plates. The resilient member supports the weight of one of the members being coupled and the tube acts... | 10/09/2001 |
| 6158532 | Subassembly electrical isolation connector for drill rod A subassembly electrical isolation connector for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations electrically isolates the inner connection of the drill rods. The connector comprises a housi... | 12/12/2000 |
| 6098727 | Electrically insulating gap subassembly for downhole electromagnetic transmission An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insul... | 08/08/2000 |
| 6070911 | Clamp-type pipe joint A clamp-type isolating pipe joint is disclosed, which can connect pipes by providing insulation between them, is easy to assemble and disassemble, has high reliability and allows easy replacement of parts and is inexpensive to manufacture and install. The... | 06/06/2000 |
| 6050353 | Subassembly electrical isolation connector for drill rod A subassembly electrical isolation connector for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations electrically isolates the inner connection of the drill rods. The connector comprises a housi... | 04/18/2000 |
| 5749605 | Electrically insulative threaded connection An insulative threaded connection is provided for metal tubulars to be placed in wells or for other metal pipe. The connection contains a coating of plastic having a selected thickness which is applied to the surface of the threads of a tubular to be mate... | 05/12/1998 |
| 5664809 | Connectors A connector assembly principally for aviation fuel lines and pipes in which a connector body is conductive whilst a mounting flange is non-conductive. The body and flange are secured together during a moulding stage. The body generally has earthing lugs e... | 09/09/1997 |
| 5645285 | Electrically insulating locking insert for a seal, corresponding seal, and method of manufacturing such inserts A locking insert 4 for joining the male and female ends of spheroidal-graphite cast-iron pipes conveying fluids under pressure has a generally planar shape, and includes at least two metal parts 4A, 4B fixed to each other by an electrically insulating jun... | 07/08/1997 |
| 5333913 | Galvanic isolation device Galvanic isolation between two fluid-conducting members made of dissimilar materials is provided by a coupling pipe that separates the two members (e.g. a pipe and a valve). The coupling pipe includes a tubular section and two flange sections, which mate ... | 08/02/1994 |
| 5232315 | End adapter for railcar pneumatic outlet An adapter (10) is useful to prevent formation of a static electrical change on an outlet valve (V) during discharge of lading from a railcar on which the valve is installed. A unitary member (12) has an inlet end (14) formed for attachment to the outlet ... | 08/03/1993 |
| 5200015 | Joining process for vacuum heat insulating elements A process for joining variously shaped vacuum heat insulating elements having edges adapted to be butted against each other or to overlap each other. A bellows is tightly connected with each vacuum heat insulating element in the area of its edges, the fre... | 04/06/1993 |
| 4776600 | Dielectric pipe flange gasket This invention discloses a dielectric pipe flange gasket having the dual functions of providing a leak proof seal for the pipe flange joint and an electrically insulating barrier between flanges, which dielectric pipe flange gasket comprises a planar annu... | 10/11/1988 |
| 4674773 | Insulating coupling for drill collars and method of manufacture thereof An insulating coupling for drill collars and a method of manufacture thereof are presented wherein the coupling consists of an electrically insulating ceramic coating applied in thickness from 0.002 to 0.006 inch to the threads of the coupling by a detona... | 06/23/1987 |
| 4668303 | Method of preventing stress corrosion in a bellows expansion joint A novel bellows expansion joint design and method of preventing stress corrosion cracking incorporates an internal cylindrical weir or sleeve which defines an inner flushing chamber adjacent the expansion bellows wherein connections are provided on the ex... | 05/26/1987 |
| 4635967 | Internal seal for insulated steam injection casing assembly An insulated casing assembly for use in injecting steam into wells or transmitting steam from the generating source to the wellhead is disclosed. A plurality of interconnected casings are used, each casing have outer and inner tubular sections and an annu... | 01/13/1987 |
| 4624484 | Shrink-fit connector for electrical well subsurface heating processes There is described an insulating connector for the wellhead of an electrode well used for heating a subsurface formation by electrical power dissipation in the formation. The insulating connector has two iron base metal fittings (for example, steel flange... | 11/25/1986 |
| 4621838 | Insert for insulated steam injection tubing An insert for insulating the area of the coupling two doublewalled tubing segments of an insulated steam injection tubing string. The insert is mounted to overlie both of a pair of adjacent tubing segment end portions radially inwardly thereof. In accorda... | 11/11/1986 |
| 4613166 | Connecting concentric tube systems Two tube systems, each comprised of two or more concentrically arranged metal tubes, are positively and electrically conductive interconnected through a coupler sleeve system composed of a corresponding number of concentrically arranged coupler sleeves of... | 09/23/1986 |
| 4560188 | Thermally insulated pipe for the construction of underwater pipelines The present invention relates to a thermally insulated pipe for the construction of underwater pipelines, characterized by being formed from prefabricated pipe portions welded together, each portion being constituted by two concentric tubes of different d... | 12/24/1985 |
| 4384222 | Flexible, electrically insulating pipe connection Flexible, electrically insulating pipe connections are required for electrical machines with liquid-cooled rotor winding between the water distribution chambers, which are rigidly connected to the body of the rotor, and the water distribution headers in t... | 05/17/1983 |
| 4192477 | Pipe-wall stud connector A mounting insulator for securing a pipe, conduit, or tube through a metal wall stud or other thin planar surface to reduce the noise of water hammer and dialectic interaction between the pipe and the wall stud, the device including an off-center pipe rec... | 03/11/1980 |
| 4124040 | Insulated pipe anchor assembly An underground high temperature conduit is intermittently anchored against axial displacement in concrete blocks by means of radially extending metallic anchor plates. The central conduit includes an adjacent insulation layer and a non-continuous reinforc... | 11/07/1978 |