| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 11/27/2002 | EP1259702A1 Power generation using batteries with reconfigurable discharge |
| 11/27/2002 | EP1259701A1 Controlled downhole chemical injection |
| 11/27/2002 | EP1259700A1 Tracer injection in a production well |
| 11/27/2002 | EP1259697A1 Rock drill bit and method for its manufacturing |
| 11/27/2002 | EP1259655A1 Elongated element and steel for percussive rock drilling |
| 11/27/2002 | CN2522612Y Series auger stem for oil exploration and geologic prospecting probing rig |
| 11/27/2002 | CN2522611Y Drillable oil-well casing centering guide |
| 11/27/2002 | CN2522610Y Oil well casing special nipple connecting piece |
| 11/27/2002 | CN2522608Y Disposable series drill bit and joint for oil exploration and geologic prospecting probing rig |
| 11/27/2002 | CN1095022C Threaded connection structure of metal tubes |
| 11/27/2002 | CN1095021C Thread joint, inserted unit, unit having internal thread and method for making thread joint |
| 11/26/2002 | US6485834 Flexible deployable preform |
| 11/26/2002 | US6485063 Connection |
| 11/26/2002 | US6484826 Engineered enhanced inserts for rock drilling bits |
| 11/26/2002 | US6484803 Dual diameter centralizer/sub and method |
| 11/26/2002 | US6484801 Flexible joint for well logging instruments |
| 11/26/2002 | CA2284325C Apparatus and method for installing a water well pump |
| 11/26/2002 | CA2216498C Floating cushion sub |
| 11/21/2002 | WO2002092955A2 Earth boring device |
| 11/21/2002 | WO2001094079A1 Rotary percussion device for a drill column |
| 11/21/2002 | US20020170750 Method and device for rotary well drilling |
| 11/21/2002 | US20020170716 Variable OD coiled tubing strings |
| 11/21/2002 | US20020170713 System for forming a window and drilling a sidetrack wellbore |
| 11/21/2002 | US20020170711 Apparatus and methods for conveying instrumentation within a borehole using continuous sucker rod |
| 11/21/2002 | DE10123058A1 Ground drilling via pilot holes, comprises rotating cylindrical head with endface angled one side for steering, and with fluid jet fed via annulus between inner and outer drill-rod once plugged together as pilot tube |
| 11/21/2002 | CA2710362A1 Apparatus and methods for tubular makeup interlock |
| 11/21/2002 | CA2410400A1 Rotary percussion device for a drill column |
| 11/20/2002 | EP0880637B1 Hydraulically releasable coupling |
| 11/20/2002 | EP0781368B1 A device for coil tubing operations |
| 11/20/2002 | CN2521375Y Oil pipe disconnecting lock catch sealing joint |
| 11/20/2002 | CN2521374Y High antitorque sucke rod for screw pump |
| 11/19/2002 | US6481498 Slip connector for use with coiled tubing |
| 11/19/2002 | US6481495 Downhole tool with electrical conductor |
| 11/19/2002 | US6481082 Portable continuous sucker rod manufacturing process |
| 11/19/2002 | CA2117086C Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 11/14/2002 | WO2002090715A1 Shock absorber |
| 11/14/2002 | WO2002090710A2 Packer with lateral feed-through connection |
| 11/14/2002 | US20020168232 Vortex-induced vibration reduction device for fluid immersed cylinders |
| 11/14/2002 | US20020166701 Apparatus and method for directional drilling with coiled tubing |
| 11/14/2002 | US20020166667 Expandable shifting tool |
| 11/13/2002 | CN2520408Y High-strength blowout prevention unloading zero clearance connecting-tripping device |
| 11/13/2002 | CN1379851A Threaded tubular joint proof to external pressure |
| 11/12/2002 | US6480811 Oilfield equipment identification method and apparatus |
| 11/12/2002 | US6479752 Coil springs for cable support |
| 11/12/2002 | US6478344 Threaded connector |
| 11/12/2002 | US6478097 Electrically sequenced tractor |
| 11/09/2002 | CA2384209A1 Expandable shifting tool |
| 11/08/2002 | WO2001086185A1 Method of tightening pipe joint |
| 11/08/2002 | CA2408799A1 Method of tightening pipe joint |
| 11/07/2002 | WO2002088618A1 Process and assembly for identifying and tracking assets |
| 11/07/2002 | WO2002088587A1 Buoyancy control systems for tubes |
| 11/07/2002 | WO2002088523A1 Method and device for drilling a hole and for securing an anchorage in a bore hole |
| 11/07/2002 | WO2002088521A1 Well provided with flexible production tubing |
| 11/07/2002 | WO2002088515A1 Offshore delivery line support |
| 11/07/2002 | WO2002087869A2 Improved composite tubing |
| 11/07/2002 | WO2002087794A1 Equipment for external cleaning of tubes with fluid under pressure |
| 11/07/2002 | US20020163192 Tubular threaded joint capable of being subjected to diametral expansion |
| 11/07/2002 | US20020162690 Downhole drilling apparatus |
| 11/07/2002 | US20020162667 Tubing hanger with lateral feed-through connection |
| 11/07/2002 | US20020162666 Deep well instrumentation |
| 11/07/2002 | US20020162596 Bore-lining tubing |
| 11/07/2002 | CA2445752A1 Well provided with flexible production tubing |
| 11/07/2002 | CA2443787A1 Process and assembly for identifying and tracking assets |
| 11/06/2002 | EP1255022A1 Apparatus and method for installing a monitoring line in a well |
| 11/06/2002 | EP1254299A2 Drill pipe torque-reduction and protection apparatus |
| 11/06/2002 | EP1222360A4 Tool assembly and monitoring applications using same |
| 11/06/2002 | CN1378032A Rotary oil rod clipping centralizer |
| 11/05/2002 | US6474701 Tubing connector |
| 11/05/2002 | US6474425 Asymmetric diamond impregnated drill bit |
| 11/05/2002 | US6474423 Drill bit (A) |
| 10/31/2002 | WO2002086369A1 Threaded coupling with water exclusion seal system |
| 10/31/2002 | WO2002086287A2 Conveying instrumentation within a borehole |
| 10/31/2002 | WO2002085821A2 In situ recovery from a relatively permeable formation containing heavy hydrocarbons |
| 10/31/2002 | US20020158469 Threaded coupling with water exclusion seal system |
| 10/31/2002 | US20020158120 Process and assembly for identifying and tracking assets |
| 10/31/2002 | US20020157868 Well casing installation and removal apparatus and method |
| 10/31/2002 | US20020157867 Apparatus and method for coring and/or drilling |
| 10/31/2002 | US20020157866 Method and apparatus for drilling an offshore underwater well |
| 10/31/2002 | US20020157834 Mudline riser-casing connecting assembly |
| 10/31/2002 | US20020157832 Method and apparatus for reducing paraffin and asphaltene deposits in pumping oil wells |
| 10/31/2002 | US20020157824 Downhole tool |
| 10/31/2002 | US20020157720 Composite spoolable tube |
| 10/31/2002 | CA2445040A1 Threaded coupling with water exclusion seal system |
| 10/30/2002 | EP1252416A1 Choke inductor for wireless communication and control in a well |
| 10/30/2002 | EP1029146A4 A friction reducing tool |
| 10/30/2002 | CN2519011Y Non-threaded joint coupling oil tube for oil well |
| 10/30/2002 | CN1376850A Grip unit of sucker rod |
| 10/30/2002 | CA2373005A1 Mudline riser-casing connecting assembly |
| 10/29/2002 | US6470978 Fluid drilling system with drill string and retro jets |
| 10/29/2002 | US6470977 Steerable underreaming bottom hole assembly and method |
| 10/29/2002 | US6470966 Apparatus for forming wellbore casing |
| 10/29/2002 | US6470558 Method for facing a substrate |
| 10/29/2002 | CA2076409C Rock drilling device |
| 10/28/2002 | WO2002088511A1 Step tube rod, and drilling machine |
| 10/28/2002 | CA2411253A1 Step tube rod, and drilling machine |
| 10/24/2002 | WO2002084163A1 Threaded joint for steel pipe and method for surface treatment of the threaded joint |
| 10/24/2002 | WO2002084162A1 Threaded joint for steel pipe |
| 10/24/2002 | US20020154028 Casing mounted sensors, actuators and generators |
| 10/24/2002 | US20020154027 Casing mounted sensors, actuators and generators |
| 10/23/2002 | EP1251598A1 Wet mateable connector |