| Patents for F16L 15 - Screw-threaded joints; Forms of screw-threads for such joints (5,444) |
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| 03/21/1989 | US4813714 Petroleum equipment tubular connection |
| 03/21/1989 | CA1251490A1 Tubular connection |
| 02/07/1989 | US4802695 Pipe screwed connection |
| 02/01/1989 | CN2031867U Multifunction low-pressure gate valve, stop valve |
| 01/24/1989 | US4799844 Elliptical thread design |
| 01/18/1989 | EP0299112A1 A force concentrating unitary fitting |
| 01/18/1989 | EP0165996B1 Tubular connection |
| 01/11/1989 | CN1030285A Sleeveless tubes for hydrocarbon pumping pipes |
| 01/10/1989 | US4796928 Threaded connection for pipes and method of fabricating same |
| 01/10/1989 | US4796923 Joints for tubular members |
| 01/10/1989 | US4796668 Device for protecting threadings and butt-type joint bearing surfaces of metallic tubes |
| 01/03/1989 | US4795200 Lengthened tubular pin member nose for improving sealing integrity and bearing forces |
| 12/27/1988 | US4793754 Process for locking two screwed elements and elements for carrying out this process |
| 12/20/1988 | US4791816 Device for determining when a threaded tube joint with screw limiting stop is properly made up |
| 12/06/1988 | CA1246118A1 Pipe joint |
| 11/30/1988 | EP0292998A1 Pipe with threaded ends |
| 11/29/1988 | CA1245689A1 Pipe connector |
| 11/23/1988 | EP0292464A1 Threaded connector for a drill pipe |
| 11/22/1988 | US4786090 Peaked-top resilient seal ring and connection therewith |
| 11/01/1988 | CA1244063A1 Pipe connection |
| 10/25/1988 | US4779454 Crankshaft angle sensing system |
| 10/19/1988 | EP0286715A1 Screwed connection |
| 10/06/1988 | WO1988007619A1 Driveable threaded tubular connection |
| 09/28/1988 | EP0203074A4 Oilwell tubing connection. |
| 09/28/1988 | EP0151574B1 Improved tubular connection |
| 09/27/1988 | US4773149 Method of making ceramic tube for high temperature use |
| 09/27/1988 | CA1242474A1 Tubular connection with cylindrical and tapered stepped threads |
| 09/13/1988 | US4770448 Pipe coupling |
| 09/13/1988 | US4770444 Joint for oil-or gas-field pipe |
| 09/07/1988 | EP0190264B1 Well pipe joint |
| 08/24/1988 | EP0152406B1 Pipe joint |
| 08/23/1988 | CA1241038A1 Tubular joint with trapped mid-joint metal-to-metal seal having unequal tapers |
| 08/10/1988 | EP0277475A2 Gas-tight connection for a casing or tubing |
| 08/09/1988 | US4762344 Well casing connection |
| 07/20/1988 | EP0274719A2 Thread-forming method and tubular body provided with a thread |
| 07/20/1988 | EP0131622B1 Tubular coupling with improved metal to metal seal |
| 07/19/1988 | US4758025 Use of electroless metal coating to prevent galling of threaded tubular joints |
| 07/19/1988 | US4757593 Method of locking a connector |
| 07/13/1988 | CN87202069U Needle valve bolt |
| 07/05/1988 | CA1238772A1 Machining of joints on tubing, essentially for use by the petrolum industry, having at least one threaded portion on a frusto-conical surface with an abutment limiting screwed assembly, and device for their production |
| 06/29/1988 | EP0273016A2 Threaded coupling for well casings |
| 06/28/1988 | US4753460 Tubular connection having two thread sets with multiple interengaging characteristics |
| 06/21/1988 | CA1238352A1 Oil well pipe joint |
| 06/15/1988 | EP0270652A1 Pipe coupling connection sealing apparatus |
| 06/15/1988 | EP0149612B1 Tubular connection with cylindrical and tapered stepped threads |
| 06/14/1988 | US4750761 Oilwell tubular connection |
| 06/14/1988 | CA1237907A1 Rod coupling for oil well sucker rods and the like |
| 06/08/1988 | EP0269726A1 Externally threaded quick connect coupling |
| 06/08/1988 | CN87204619U Pipe connection and its sealing device |
| 05/19/1988 | DE3739039A1 Zweiweganschlussteil mit unabhaengigen regelventilen fuer wasserhahn Zweiweganschlussteil with independent control valves for water closet |
| 05/17/1988 | CA1236865A1 Latching connector |
| 05/10/1988 | CA1236502A1 Tubular connection having a chevron wedge thread |
| 05/10/1988 | CA1236501A1 Hostile environment tubular joint seal and method for installation |
| 05/03/1988 | US4741561 Remotely monitored seal in a connection joint |
| 04/28/1988 | DE3734347A1 Bohrstange Drill rod |
| 04/27/1988 | EP0264446A1 Joint for oil well pipes and method of manufacturing same |
| 04/20/1988 | CN86106732A Threaded connection joint of a steel tube with sealing unit at the threaded portion |
| 04/12/1988 | US4736967 Tubular pin configuration to prevent galling while ensuring sealing |
| 04/05/1988 | US4735444 Pipe coupling for well casing |
| 04/05/1988 | US4735441 Non-loosening luer nut |
| 03/23/1988 | CN87206080U Adjustable movable joint consisted of three members |
| 03/22/1988 | US4732416 Pipe connectors |
| 03/15/1988 | US4730857 Cylindrical threaded connection with uniform interference |
| 03/08/1988 | CA1233855A1 Pipe connectors |
| 03/01/1988 | US4728129 Hydril-type connector |
| 03/01/1988 | US4728127 Pipe joint |
| 02/24/1988 | CN87205802U Reflex elbow bend for warm air bag |
| 01/27/1988 | EP0254552A1 Improvements in or relating to joints for tubular members |
| 01/05/1988 | US4717183 Conical thread configuration for rapid make-up connection |
| 12/23/1987 | CN87104182A Externally threaded quick connect coupling having integral fluid pressure assisted seal and method of using same |
| 12/17/1987 | WO1987007699A1 Pipe coupling connection sealing apparatus |
| 12/17/1987 | WO1987007698A1 Externally threaded quick connect coupling having integral fluid pressure assisted seal and method of using same |
| 12/16/1987 | EP0248979A1 Coupling component |
| 12/15/1987 | US4712815 Metal-to-metal wedge thread coupling connector |
| 12/15/1987 | CA1230359A1 Pipe joint |
| 12/15/1987 | CA1230358A1 Threaded connection integrally provided with an anti-unthreading lock |
| 12/08/1987 | US4711474 Pipe joint seal rings |
| 12/08/1987 | US4711471 Non-clocking connector with locking anti-rotation tabs |
| 12/01/1987 | CA1229862A1 Tubular joint with trapped mid-joint metal to metal seal |
| 12/01/1987 | CA1229720A1 Self-aligning connector assembly |
| 11/25/1987 | EP0246387A1 Threaded coupling for earth-boring members |
| 11/24/1987 | US4708038 Method for machining and improved modified threaded collar |
| 11/19/1987 | DE3712260A1 Fitting aus einem gusswerkstoff Fitting of a cast material- |
| 11/17/1987 | US4707001 Liner connection |
| 11/17/1987 | US4706997 For A.P.I. standard round or buttress thread tubing or casing |
| 11/10/1987 | US4705307 Tubular goods joint |
| 11/05/1987 | WO1987006673A1 Joint for oil well pipes and method of manufacturing same |
| 11/04/1987 | EP0244194A2 Anti-rotation tubular connection for flowlines or the like |
| 11/03/1987 | US4703959 Threaded pipe connection with compressible seal ring |
| 11/03/1987 | US4703954 Threaded pipe connection having wedge threads |
| 10/28/1987 | EP0242796A1 Screw thread connection for pipe installations |
| 10/21/1987 | EP0241521A1 Seal for threaded pipe connection. |
| 10/20/1987 | US4700576 Process and device for executing the screwing of a threaded joint for tubes, equipped with a stop |
| 09/30/1987 | EP0239338A2 End connectors for filament wound tubes |
| 09/30/1987 | EP0131621B1 Tubular joint with trapped mid-joint metal to metal seal |
| 09/29/1987 | US4696498 Tubular connection |
| 09/15/1987 | US4693498 Anti-rotation tubular connection for flowlines or the like |
| 09/15/1987 | US4692988 Under tightening torques, dry and liquid lubricants |
| 09/01/1987 | US4690436 Pipe coupling |
| 08/26/1987 | EP0233802A1 Composite threaded fitting for steel pipe |