| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 10/14/1997 | US5676209 Deep water riser assembly |
| 10/14/1997 | CA2163946C Dizzy dognut anchoring system |
| 10/09/1997 | WO1997037103A1 Method and system for monitoring a characteristic of an earth formation in a well |
| 10/08/1997 | EP0799966A2 Drill bit for percussive drilling |
| 10/08/1997 | CN2264248Y Petroleum casing 45 degree angle whirl centering guide |
| 10/07/1997 | US5673765 Downhole drilling subassembly and method for same |
| 10/07/1997 | US5673763 Modulated bias unit for rotary drilling |
| 10/02/1997 | WO1997036063A1 Heated offshore pipeline and method of manufacturing |
| 10/01/1997 | EP0798444A1 Cylindrical telescopic kelly-bar apparatus |
| 10/01/1997 | EP0798443A2 Directional drilling method |
| 10/01/1997 | EP0628127B1 Downhole tool for controlling the drilling course of a borehole |
| 09/30/1997 | US5671818 Rotary drill bits |
| 09/30/1997 | US5671816 Swivel/tilting bit crown for earth-boring drills |
| 09/30/1997 | US5671811 Tube assembly for servicing a well head and having an inner coil tubing injected into an outer coiled tubing |
| 09/30/1997 | CA2054080C Drill pipes for rotary-vibratory drills |
| 09/25/1997 | WO1997035093A1 Method and apparatus using coiled-in-coiled tubing |
| 09/25/1997 | WO1997035092A1 A removable guide member for guiding drill string components in a drill hole |
| 09/25/1997 | CA2249282A1 A removable guide member for guiding drill string components in a drill hole |
| 09/25/1997 | CA2200132A1 Monobore completion/intervention riser system |
| 09/24/1997 | EP0796406A1 Internal coiled tubing connector |
| 09/24/1997 | EP0676001A4 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface. |
| 09/24/1997 | EP0577845B1 Device for positioning member and excavating direction control device for excavator employing said device |
| 09/24/1997 | CN2263195Y Cross key flanged drilling rod joint |
| 09/23/1997 | US5670747 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 09/23/1997 | US5669455 Bi-rotational coupling system |
| 09/23/1997 | US5669443 Shoe for used in the construction of oil and gas wells |
| 09/23/1997 | US5669420 Casing and flexible tubular conduit comprising such a casing and process for producing it |
| 09/23/1997 | CA2045094C Low friction subterranean drill bit and related methods |
| 09/20/1997 | CA2200415A1 A casing and method of installing the casing in a well |
| 09/18/1997 | WO1997034070A1 Device for drilling a bore hole in the ground |
| 09/18/1997 | DE19609899A1 Vorrichtung zur Herstellung eines Erdlochs Apparatus for producing a earthen hole |
| 09/17/1997 | EP0795074A1 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 09/17/1997 | CN1159851A Steel pipe joint having high galling resistance and surface treatment method thereof |
| 09/17/1997 | CN1159848A Centralisers |
| 09/17/1997 | CN1159526A Threaded joint for metal tubes with internal coating |
| 09/16/1997 | US5667027 Drill stabilizer |
| 09/16/1997 | US5667022 Hydraulic impact device with continuously controllable impact rate and impact force |
| 09/16/1997 | US5667009 Rubber boots for electrical connection for down hole well |
| 09/16/1997 | US5667008 Seal electrical conductor arrangement for use with a well bore in hazardous areas |
| 09/16/1997 | CA2113297C Method and apparatus for internally connecting to coiled tubing |
| 09/10/1997 | EP0794315A1 Device for drilling in soil |
| 09/10/1997 | EP0793764A1 Thread coupling for drill string elements for percussive drilling |
| 09/10/1997 | EP0793763A1 Coupling for anchor bars |
| 09/09/1997 | US5664627 Method and apparatus for protecting a steel riser from chemical cutters |
| 09/09/1997 | US5664606 Drill pipe having concave wrenching recesses |
| 09/07/1997 | CA2199192A1 Downhole disconnect tool |
| 09/07/1997 | CA2196933A1 Multipurpose tool |
| 09/04/1997 | WO1997032110A2 Downhole core sampling and testing apparatus |
| 09/04/1997 | WO1997032109A1 Dual pitch connecting joint |
| 09/04/1997 | DE19607988A1 Coupling connecting rotary drilling drive to injector transferring mortar into rock anchor |
| 09/03/1997 | EP0792429A1 High-pressure fiber reinforced composite pipe joint |
| 09/03/1997 | EP0587675B1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 09/02/1997 | US5662341 Metal-to-metal seal assembly for oil and gas well production apparatus |
| 08/28/1997 | WO1997030889A1 System for anchoring ships |
| 08/28/1997 | WO1997030888A1 System for loading ships at sea |
| 08/28/1997 | WO1997030887A1 System for production of hydrocarbons |
| 08/28/1997 | WO1997020130A3 Downhole apparatus and method for expanding a tubing |
| 08/28/1997 | WO1997019248A3 Downhole equipment |
| 08/27/1997 | EP0791124A1 Stabiliser tool |
| 08/26/1997 | US5660241 Pressure compensated weight on bit shock sub for a wellbore drilling tool |
| 08/26/1997 | US5660233 Riser for great water depths |
| 08/26/1997 | US5660211 Galvanic corrosion resistant insulating pipe having excellent film adhesion |
| 08/21/1997 | WO1997030269A1 Motor drive actuator for downhole flow control devices |
| 08/21/1997 | WO1997030261A1 Dual-member pipe joint for a dual member drill string |
| 08/21/1997 | WO1997029944A1 Flexible risers with stabilizing frame |
| 08/20/1997 | EP0536256B1 Radially deformable tube consisting of several releasably connected sections |
| 08/19/1997 | US5657823 Near surface disconnect riser |
| 08/14/1997 | WO1997029270A1 Hydraulically releasable coupling |
| 08/14/1997 | WO1997021901A3 Tubing connector |
| 08/14/1997 | CA2246261A1 Support of a combined feed-out/feed-in device for a coilable tubing |
| 08/14/1997 | CA2245947A1 Hydraulically releasable coupling |
| 08/13/1997 | EP0789131A2 Downhole abrasive slurry delivery apparatus |
| 08/13/1997 | EP0789085A1 Method for mechanical treatment of elongated amagnetic austenitic steel workpieces, especially of drill collars for oil drilling |
| 08/13/1997 | EP0788578A1 2-stage underreamer |
| 08/13/1997 | EP0644979A4 Method and apparatus for inspecting subsurface environments. |
| 08/12/1997 | US5655612 Earth-boring bit with shear cutting gage |
| 08/12/1997 | US5655609 Extension and retraction mechanism for subsurface drilling equipment |
| 08/10/1997 | CA2169217A1 Torque reduction sub |
| 08/06/1997 | EP0787550A1 Drill bit |
| 08/05/1997 | US5653819 Method for cleaning threaded portions of tubular members |
| 07/31/1997 | WO1997027382A1 Completions insertion and retrieval under pressure (cirp) apparatus including the snaplock connector |
| 07/31/1997 | WO1997027380A2 Method for forming a window in a tubular and apparatus for use in said method |
| 07/31/1997 | WO1997027379A1 Drilling tool |
| 07/31/1997 | WO1997027022A1 Friction welded product for rock drilling and method for manufacturing the product |
| 07/31/1997 | CA2242341A1 Method for forming a window in a tubular and apparatus for use in said method |
| 07/31/1997 | CA2195698A1 Tool protective guide with energy absorbing bumper |
| 07/30/1997 | EP0786616A1 Steel pipe joint having high galling resistance and surface treatment method thereof |
| 07/30/1997 | EP0522044B1 Thermal mineral extraction system |
| 07/30/1997 | CN1155639A Threaded joint for tubes |
| 07/29/1997 | US5651737 Drill motor coupling for misaligned rotating shafts |
| 07/24/1997 | WO1997026437A1 Threaded joint |
| 07/24/1997 | WO1997026436A1 Extension and retraction mechanism for subsurface drilling equipment |
| 07/22/1997 | US5649725 Thread joint for tube |
| 07/22/1997 | US5649603 Downhole tools having circumferentially spaced rolling elements |
| 07/17/1997 | WO1997025561A2 Subsea flexible pipe |
| 07/17/1997 | WO1997025518A2 Apparatus for setting a liner in a well casing |
| 07/17/1997 | WO1997025515A1 Release mechanism |
| 07/17/1997 | CA2242307A1 Release mechanism |
| 07/15/1997 | US5647447 Bit retention device for a bit and chuck assembly of a down-the-hole percussive drill |
| 07/09/1997 | EP0782660A1 Centralisers |