| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/29/2000 | CN2371333Y Autocontrolled valve joint for drilling well |
| 03/29/2000 | CN2371330Y General polish rod sealer |
| 03/29/2000 | CN2371329Y Stepped hole type eccentric injection well down-hole flow |
| 03/29/2000 | CN1249015A Downhole clutch with flow ports |
| 03/28/2000 | US6042303 Riser system for sub sea wells and method of operation |
| 03/28/2000 | US6042153 Threaded connection for internally clad pipe |
| 03/28/2000 | US6041874 Tubular actuator component for use in a drill string |
| 03/28/2000 | US6041855 High torque pressure sleeve for easily drillable casing exit ports |
| 03/28/2000 | US6041487 Method for producing sealing surfaces on a tubular member |
| 03/22/2000 | CN2370151Y Composite thin wall repairing oil well casing device |
| 03/22/2000 | CN2370150Y Liner of composite thin wall repairing oil well casing |
| 03/22/2000 | CN1050646C Chuck for rock drill |
| 03/21/2000 | US6039130 Square drill collar featuring offset mass and cutter |
| 03/21/2000 | US6039118 Wellbore tool movement control and method of controlling a wellbore tool |
| 03/16/2000 | WO2000014375A1 Device for application of dope on male threads |
| 03/15/2000 | EP0793764B1 Thread coupling for drill string elements for percussive drilling |
| 03/14/2000 | US6036451 Shaft assemblies for lineshaft turbine pump |
| 03/14/2000 | US6035953 Down hole hammer assembly |
| 03/14/2000 | US6035938 Wellhead system and method for use in drilling a subsea well |
| 03/09/2000 | WO2000012824A1 Composite tubular and methods |
| 03/09/2000 | DE19849611C1 Production of ground bores and-or destruction of old pipe conduits underground |
| 03/09/2000 | DE19840312C1 Pressure transmission joint for drain water pipe has elastic inner layer with intermediate layers and outer layers between facing pipe ends |
| 03/08/2000 | EP0983419A2 Marine riser |
| 03/08/2000 | EP0778914A4 Drill casing installation equipment with external friction reducing means |
| 03/08/2000 | EP0742968A4 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 03/08/2000 | CN2367761Y Anti-drop single spinner for sucker rod |
| 03/08/2000 | CN1050177C Oil well pipe and method for manufacturing thereof |
| 03/07/2000 | US6033152 Pile forming apparatus |
| 03/07/2000 | US6032748 Non-rotatable stabilizer and torque reducer |
| 03/07/2000 | US6032735 Gravel pack apparatus |
| 03/07/2000 | US6032733 Cable head |
| 03/02/2000 | WO2000011312A1 Grouting pipe equipment and method of grouting using the same for an underground water well |
| 03/02/2000 | WO2000011303A1 Apparatus for directional drilling |
| 03/02/2000 | WO1999067501A3 High pressure hydraulic line connector |
| 03/01/2000 | EP0982468A1 Method for wrapping a cable around a pipe construction and pipe construction assembly |
| 03/01/2000 | EP0981678A1 Arrangement in a drilling apparatus |
| 02/29/2000 | US6030145 Articulated underwater cable riser system |
| 02/29/2000 | US6030004 High torque threaded tool joint for drill pipe and other drill stem components |
| 02/29/2000 | US6029755 Conductive medium for openhole logging and logging while drilling |
| 02/24/2000 | WO2000009852A1 Bottom-supported guidance device for alignment of multiple wellbores in a single conductor |
| 02/24/2000 | WO2000009817A1 Marine riser having variable buoyancy |
| 02/22/2000 | US6027286 Offshore spar production system and method for creating a controlled tilt of the caisson axis |
| 02/22/2000 | US6027145 Joint for steel pipe having high galling resistance and surface treatment method thereof |
| 02/22/2000 | US6026916 Rotary drill arrangement |
| 02/22/2000 | US6026915 Early evaluation system with drilling capability |
| 02/22/2000 | US6026911 Downhole tools using artificial intelligence based control |
| 02/22/2000 | US6026900 Multiple liner method for borehole access |
| 02/22/2000 | US6026897 Communication conduit in a well tool |
| 02/17/2000 | WO2000008370A1 Multi-start wedge thread for tubular connection |
| 02/17/2000 | WO2000008367A2 Pipe connection |
| 02/17/2000 | WO2000008262A1 Enhanced steel catenary riser system |
| 02/16/2000 | EP0979923A1 Installation for the exploitation of an offshore oil deposit and method for mounting a riser |
| 02/16/2000 | EP0979922A2 Tube rod |
| 02/16/2000 | EP0979920A2 Drill apparatus with twin impact system |
| 02/16/2000 | EP0979369A1 Threaded connection for enhanced fatigue resistance |
| 02/16/2000 | EP0979343A1 Apparatus for controlling the motion of a string of tubulars in a wellbore |
| 02/16/2000 | EP0979342A1 Buoyancy device and method for using same |
| 02/16/2000 | CN1244633A Spiral tube system combined with submersible pump system |
| 02/16/2000 | CN1244623A Drilling rig capable of resisting very high pressure |
| 02/15/2000 | USRE36566 Spoolable coiled tubing mandrel and gas lift valves |
| 02/15/2000 | US6024168 Wellborne mills & methods |
| 02/15/2000 | CA2173523C Extended wear rod guide and method |
| 02/12/2000 | CA2268400A1 "twin-impact" double-blow drilling apparatus |
| 02/10/2000 | WO2000006936A1 Threaded and coupled connection for improved fatigue resistance |
| 02/10/2000 | WO2000006867A1 Drill pipe protection rings |
| 02/10/2000 | DE19901497C1 Driving method for underground pipe line has the butting pipe sections fitted with jointing sleeves to provide flexibility for the line and with a final jointing process to link then pipe sections |
| 02/09/2000 | EP0978677A2 High-pressure fiber reinforced composite pipe joint |
| 02/09/2000 | CN2363043Y Screw drill |
| 02/08/2000 | US6023027 Cable guard having a hinge rod and for protecting cables extending along a tubing string |
| 02/08/2000 | US6021858 Drill bit having trapezium-shaped blades |
| 02/08/2000 | US6021856 Bit retention system |
| 02/08/2000 | US6021855 Method, drilling tool and rock drill bit for transferring impact energy from a top hammer unit |
| 02/03/2000 | WO2000005612A1 Optical fiber cable for use in harsh environments |
| 02/03/2000 | WO2000005506A2 Annular fluid manipulation in lined tubular systems |
| 02/03/2000 | WO2000005485A1 Method and apparatus for conveying fluids, particularly useful with respect to oil wells |
| 02/03/2000 | WO2000005482A1 Tool string shock absorber |
| 02/03/2000 | WO2000005129A1 Riser arrangement for offshore vessel and method for installation |
| 02/03/2000 | WO1999066169A3 Device related to risers |
| 02/03/2000 | WO1999058809A3 Coupling with shape-memory material, disconnecting tool with a piston and coupling with valves |
| 02/03/2000 | DE19836088C1 Rohrverbindung Pipe connection |
| 02/03/2000 | CA2338730A1 Method and apparatus for conveying fluids, particularly useful with respect to oil wells |
| 02/02/2000 | EP0754105B1 Method for facing a substrate |
| 02/02/2000 | CN2361823Y Roller coupling of pumping rod for pumping motor-pumped well |
| 02/01/2000 | US6019549 Vortex shedding strake wraps for submerged pilings and pipes |
| 02/01/2000 | US6019182 Collar mounted downhole tool |
| 01/30/2000 | CA2278987A1 Tube rod |
| 01/27/2000 | WO2000004269A2 Subsea wellbore drilling system for reducing bottom hole pressure |
| 01/27/2000 | WO2000003600A2 Improved tubing handling for subsea oilfield tubing operations |
| 01/26/2000 | EP0974730A2 Rotary dag bit |
| 01/26/2000 | CN2360597Y Oil well thermal insulating anti-corrosion appts |
| 01/26/2000 | CN2360590Y Bearing centering disk root box |
| 01/26/2000 | CN2360583Y Flexible coupling of well power drilling tool |
| 01/26/2000 | CN2360582Y Drive shaft of well power drilling tool |
| 01/25/2000 | USRE36525 Spoolable flexible hydraulically set, straight pull release well packer |
| 01/25/2000 | US6017198 Submersible well pumping system |
| 01/25/2000 | US6017168 Fluid assist bearing for telescopic joint of a RISER system |
| 01/25/2000 | US6016866 Rod guide with wear gauge |
| 01/25/2000 | US6016845 Composite spoolable tube |
| 01/20/2000 | WO2000003116A1 Downhole tension swivel sub |
| 01/20/2000 | WO2000003115A1 Boring device |