| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 08/21/2002 | CN1365418A Method for creating a weld in a wellbore |
| 08/21/2002 | CN1089398C Threaded joint for tubes |
| 08/20/2002 | US6435775 Buoyancy system with buoyancy module seal |
| 08/20/2002 | US6435275 Casing centralizer |
| 08/20/2002 | CA2372835A1 Methods and apparatus for interconnecting well tool assemblies in continuous tubing strings |
| 08/20/2002 | CA2372287A1 Method and apparatus for connecting a main well bore and a lateral branch |
| 08/15/2002 | WO2002063128A1 Marine riser tower |
| 08/15/2002 | WO2002063127A1 Nonstructural buoyancy can |
| 08/15/2002 | WO2002038907A3 Knuckle-swivel for drilling wells |
| 08/15/2002 | WO2002027228A3 Data resource mounted within a threaded pipe coupling |
| 08/15/2002 | US20020108787 Boring apparatus |
| 08/14/2002 | EP1068424B1 Apparatus with coil springs and method for supporting a cable in a tubing |
| 08/14/2002 | CN2505582Y Bidirectional compensating device for oil pipe |
| 08/14/2002 | CN2505581Y Wear-proof device for forced sucker rod |
| 08/14/2002 | CN1089139C Long stroke oil sucker |
| 08/13/2002 | US6431285 Apparatus for drilling an offshore underwater well |
| 08/13/2002 | US6431271 Apparatus comprising bistable structures and methods for their use in oil and gas wells |
| 08/13/2002 | US6431270 Downhole tools with a mobility device |
| 08/13/2002 | US6431269 Electrically controlled release device |
| 08/13/2002 | CA2255288C Apparatus and method for stabilized downhole drilling motor |
| 08/13/2002 | CA2163282C Threaded joint for oil well pipes |
| 08/08/2002 | WO2002060749A2 Buoyancy module with external frame |
| 08/08/2002 | WO2002029196A3 Improved well testing system |
| 08/08/2002 | US20020105334 Drill string enabling information to be transmitted |
| 08/08/2002 | US20020105187 Riser connector |
| 08/08/2002 | US20020104685 Method of and system for controlling directional drilling |
| 08/08/2002 | US20020104651 Systems for heat exchange with earth loops |
| 08/07/2002 | EP1229211A2 Breech lock wireline connector |
| 08/07/2002 | EP1077869A4 Submerged pipeline manifold for offloading mooring buoy and method of installation |
| 08/07/2002 | CN2504381Y Energy saving buffer of sucker rod |
| 08/07/2002 | CN2504380Y Sleeving nipple |
| 08/07/2002 | CN2504379Y Screw drilling tool universal-joint |
| 08/07/2002 | CN2504378Y Three-preventino oil pipe |
| 08/06/2002 | US6429784 Casing mounted sensors, actuators and generators |
| 08/06/2002 | US6427792 Active gauge cutting structure for earth boring drill bits |
| 08/06/2002 | US6427783 Steerable modular drilling assembly |
| 08/06/2002 | US6427782 Noise suppression drilling system |
| 08/01/2002 | WO2002059519A1 Threaded joint for steel pipe with excellent seizure and corrosion resistances |
| 08/01/2002 | WO2002031312A3 Drill string member |
| 08/01/2002 | WO2001009481A9 Anti-rotation device for use with well tools |
| 08/01/2002 | US20020102128 Rod coupling |
| 08/01/2002 | US20020100614 Apparatus for use in drilling oil and gas production wells or water injection wells |
| 08/01/2002 | US20020100586 Full bore automatic gun release module |
| 07/31/2002 | EP1227216A1 Drill string for transmitting information |
| 07/31/2002 | EP1226329A2 Drill string member with bearings |
| 07/31/2002 | EP0898638B1 Washpipe stabilisation |
| 07/31/2002 | EP0786616B1 Steel pipe joint having high galling resistance and surface treatment method thereof |
| 07/31/2002 | CN2503195Y Centering sucker rod |
| 07/30/2002 | US6425443 Pressure compensated disconnect system and method |
| 07/30/2002 | US6425442 Anti-rotation device for use with well tools |
| 07/26/2002 | CA2563145A1 Sand barrier for a level 3 multilateral wellbore junction |
| 07/25/2002 | WO2002057594A1 Well screen cover |
| 07/25/2002 | WO2002057591A1 Coupling sleeve for connection of a threaded rock bolt to an impact rock drilling machine |
| 07/25/2002 | WO2002035128A3 Threaded pipe joint |
| 07/25/2002 | US20020096611 High strength buoyant clamp assembly and method of using same |
| 07/25/2002 | US20020096368 Downhole tool |
| 07/25/2002 | US20020096335 Aluminum riser apparatus, system and method |
| 07/25/2002 | US20020096333 Base-pipe flow control mechanism |
| 07/25/2002 | US20020096322 Down hole tool and method |
| 07/25/2002 | DE10110399C1 Rod used in a drilling device, for producing holes in the ground using a rotating and feed drive, comprises several pipe sections joined together so that they cannot rotate and tensioned by a tension rod arranged inside the pipe sections |
| 07/25/2002 | DE10102308A1 Rotary-percussive rockdrill with flushing bore uses symmetrically placed driver grooves larger than residual web round smooth cylindrical shaft for increased torque and percussion rate. |
| 07/24/2002 | EP1225301A1 Hollow drill pipe for transmitting information |
| 07/24/2002 | EP1224417A1 Composite coiled tubing end connector and pipe-to-pipe connector |
| 07/24/2002 | EP1224376A1 Sleeve for stiffening an output shaft on a mill |
| 07/24/2002 | CN2502003Y Anti-dropping device for pump rod |
| 07/23/2002 | US6422791 Riser to sleeve attachment for flexible keel joint |
| 07/23/2002 | US6422324 Method and device for driving bore-holes, in the sea bed using a counterflush method |
| 07/23/2002 | CA2081908C Oilfield equipment identification apparatus |
| 07/18/2002 | WO2002055838A1 Improved downhole tool |
| 07/18/2002 | WO2002055836A1 Method of drilling and operating a subsea well |
| 07/18/2002 | WO2002055832A2 Conductive medium for openhole logging and logging while drilling |
| 07/18/2002 | WO2002055331A2 Sectional drive system |
| 07/18/2002 | WO2002029207B1 Method and system for tubing a borehole in single diameter |
| 07/18/2002 | US20020093431 Method and apparatus for determining position in a pipe |
| 07/18/2002 | US20020092684 Hydro-lifter rock bit with PDC inserts |
| 07/18/2002 | US20020092656 Wear bushing running and retrieval tools |
| 07/18/2002 | US20020092655 Subsea wellbore drilling system for reducing bottom hole pressure |
| 07/18/2002 | US20020092653 Hydraulically metered travel joint |
| 07/18/2002 | US20020092650 Method and apparatus for stimulation of multiple formation intervals |
| 07/18/2002 | US20020092647 Sucker rod protector |
| 07/17/2002 | EP1222417A1 Threaded tubular joint proof to external pressure |
| 07/17/2002 | EP1222360A1 Tool assembly and monitoring applications using same |
| 07/17/2002 | EP1222359A1 Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools |
| 07/17/2002 | EP1222358A1 A device by a protective cap for pipes |
| 07/17/2002 | EP0760896B1 A well entry tool |
| 07/17/2002 | CN2500792Y Device for centralising oil producing well rod |
| 07/16/2002 | US6419277 Conduit section having threaded section connectors and external conduits attached thereto |
| 07/16/2002 | US6419034 Engineered enhanced inserts for rock drilling bits |
| 07/16/2002 | US6419033 Apparatus and method for simultaneous drilling and casing wellbores |
| 07/16/2002 | US6419018 Controlling temperature; heating |
| 07/16/2002 | CA2745733A1 Technique of forming expandable devices from cells that may be transitioned between a contracted state and an expanded state |
| 07/11/2002 | WO2002053871A1 Centralizer including measurement means |
| 07/11/2002 | WO2002053870A1 Rod linkage |
| 07/11/2002 | WO2002053869A1 Marine riser tower |
| 07/11/2002 | US20020088648 Drilling assembly with a steering device for coiled -tubing operations |
| 07/11/2002 | DE10100541A1 Bohrgestängebrechhilfe Bohrgestängebrechhilfe |
| 07/11/2002 | DE10065533A1 Gestängekupplung Pushrod connector |
| 07/10/2002 | EP1221533A1 Drill pipe breakout device |
| 07/10/2002 | EP1220974A1 Method of drilling a wellbore with disengagable couplers |
| 07/10/2002 | CN2499565Y Heat insulation tube seal bush |