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Class Information
Number: 285/123.1
Name: Pipe joints or couplings > Having plural independent paths > For concentric tubes or pipes (e.g., well casing or wellhead type)
Description: Subject matter comprising means mounting an inner tube in spaced relation to an outer tube.










Sub-classes under this class:

Class Number Class Name Patents
285/123.15 Double-walled or duplex joint 112
285/123.2 Having plural parallel suspended inner tubes 54
285/123.3 Having single suspended inner tube 79
285/123.17 Joint fabricated from material to compensate for movement 37


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8701467 Flange fitting with leak sensor port Apr. 22, 2014
8662184 Multi-section tree completion system Mar. 4, 2014
8662185 Active casing hanger hook mechanism Mar. 4, 2014
8631873 Tubing hanger--production tubing suspension arrangement Jan. 21, 2014
8622138 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well Jan. 7, 2014
8590624 Bridging hanger and seal running tool Nov. 26, 2013
8585097 Pipe stalk and method of assembling a pipeline therefrom Nov. 19, 2013
8573306 Apparatus and method for recovering fluids from a well and/or injecting fluids into a well Nov. 5, 2013
8534713 Connecting structure of a double tube Sep. 17, 2013
8505981 Gasket-less vent pipe coupling Aug. 13, 2013
8485262 Modular, stackable wellhead system Jul. 16, 2013
8403057 Wellhead connection Mar. 26, 2013
8316948 Actuation assembly for riser connection dog Nov. 27, 2012
8308200 Quick connect hose-in-hose coupler Nov. 13, 2012
RE43773 Drilling quick connectors Oct. 30, 2012
RE43697 Drilling quick connectors Oct. 2, 2012
8267433 Plug-in coupling for cryogenic lines Sep. 18, 2012
8206149 Demountable burner Jun. 26, 2012
8141218 Method for manufacturing a double walled pipeline Mar. 27, 2012
8074687 Cryogenic transfer hose Dec. 13, 2011
8061739 Thermal insulation device of a screwed junction Nov. 22, 2011
7984928 Safety coupling Jul. 26, 2011
7942452 Flange fitting with leak sensor port May. 17, 2011
7896402 Spacer for coaxially sheathed fuel pipes Mar. 1, 2011
7753413 Vapour-compression type refrigerating machine and double pipe structure and double pipe joint structure preferably used therefor Jul. 13, 2010
7740286 Rotary transmission leadthrough provided with a gas return line Jun. 22, 2010
7694753 Dual rod drill pipe with improved flow path method and apparatus Apr. 13, 2010
7681922 Connection between cooled pipe and uncooled pipe in a double-pipe heat exchanger Mar. 23, 2010
7650936 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use Jan. 26, 2010
7635031 Apparatus and method for installing a sucker rod guide Dec. 22, 2009
7628429 Double containment pressure termination fitting for dissimilar materials Dec. 8, 2009
7614453 Stress distributing wellhead connector Nov. 10, 2009
7584764 Coaxial quick disconnect coupling Sep. 8, 2009
7578528 Configuration for sealing off two fluid-carrying subassemblies Aug. 25, 2009
7543659 Modular connector and method Jun. 9, 2009
7503391 Tieback connector Mar. 17, 2009
7493944 Wellhead isolation tool and method of fracturing a well Feb. 24, 2009
7490861 Couplings Feb. 17, 2009
7475721 Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use Jan. 13, 2009
7427084 Hose-in-hose coupler with longitudinally shiftable sleeve Sep. 23, 2008
7416020 Wellhead isolation tool, wellhead assembly incorporating the same, and method of fracturing a well Aug. 26, 2008
7392840 Method and means to seal the casing-by-casing annulus at the surface for reverse circulation cement jobs Jul. 1, 2008
7350580 Subsea pass thru switching system Apr. 1, 2008
7322407 Wellhead isolation tool and method of fracturing a well Jan. 29, 2008
7225837 Casing spacer with joint restraint Jun. 5, 2007
7226089 Jacketed pipe flange Jun. 5, 2007
7137651 Fluid piping systems and pipe spools suitable for sub sea use Nov. 21, 2006
7100946 Bulkhead assembly for use in pipe-in-pipe systems Sep. 5, 2006
7086668 Coupling assembly Aug. 8, 2006
7062836 Pipe fitting apparatus and methods Jun. 20, 2006

1 2 3 4 5










 
 
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