| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/09/1997 | CN1153863A Adapter for oil well tubings |
| 07/02/1997 | EP0781368A1 A device for coil tubing operations |
| 07/01/1997 | US5642782 Downhole clutch assembly |
| 07/01/1997 | US5642780 For providing a fluid-tight seal |
| 06/26/1997 | WO1997022780A1 Catenary riser system |
| 06/25/1997 | EP0780617A1 Screw connection for internally coated metal pipes |
| 06/25/1997 | EP0780543A2 Pressure compensated weight on bit shock sub for a wellbore drilling tool |
| 06/24/1997 | US5642051 Method and apparatus for surveying and monitoring a reservoir penetrated by a well including fixing electrodes hydraulically isolated within a well |
| 06/24/1997 | US5641018 Apparatus and method for cementing wells |
| 06/24/1997 | CA2067306C Rod guide assembly and method of its installation on a rod shank |
| 06/19/1997 | WO1997021901A2 Tubing connector |
| 06/19/1997 | WO1997021900A1 Fluid drilling system |
| 06/18/1997 | EP0778915A1 Drill rod |
| 06/18/1997 | EP0778914A1 Drill casing installation equipment with external friction reducing means |
| 06/18/1997 | CN2256466Y Upside down Couplings |
| 06/18/1997 | CN2256465Y Hydraulic, pneumatic core stick for assembling oil well pump bushing |
| 06/17/1997 | USRE35533 Double lobe tubular connector clamp |
| 06/17/1997 | US5639187 Marine steel catenary riser system |
| 06/17/1997 | US5638904 Within wells |
| 06/12/1997 | WO1997021117A1 Composite material structures having reduced signal attenuation |
| 06/12/1997 | WO1997021017A1 Riser system |
| 06/11/1997 | CN2256032Y Automatic screwing down sealing case for polish rod |
| 06/10/1997 | US5636691 Abrasive slurry delivery apparatus and methods of using same |
| 06/05/1997 | WO1997020130A2 Downhole apparatus and method for expanding a tubing |
| 06/04/1997 | EP0777034A1 Stiffening element for a flexible pipeline in a marine environment |
| 06/04/1997 | EP0777018A1 A method of producing a concrete encasing in the ground, an apparatus for producing a concrete encasing within a hole in the ground, and a concrete encasing provided within a hole in the ground |
| 06/04/1997 | EP0689636B1 Clamshell grab for drilling cylindrical holes |
| 06/03/1997 | US5634671 Riser connector |
| 06/03/1997 | CA2119810C Emergency downhole disconnect tool |
| 05/29/1997 | WO1997019248A2 Downhole equipment |
| 05/28/1997 | EP0775802A2 Method and apparatus for directional drilling |
| 05/28/1997 | CN2254950Y Assembling type centrolising device |
| 05/28/1997 | CN2254949Y Casing joint for big pump |
| 05/27/1997 | US5632335 Well tubing and pump rod protector |
| 05/22/1997 | WO1997018381A1 Side pocket mandrel |
| 05/22/1997 | WO1997018380A1 Riser that is to be detached near the water surface |
| 05/22/1997 | WO1997012115A3 Composite coiled tubing end connector |
| 05/22/1997 | CA2233020A1 Side pocket mandrel |
| 05/21/1997 | EP0774612A1 Thermal and/or acoustic insulation system for a pipe |
| 05/21/1997 | EP0774565A2 Downhole arrangement for acquiring well information |
| 05/20/1997 | US5631563 Resistivity antenna shield, wear band and stabilizer assembly for measuring-while-drilling tool |
| 05/20/1997 | US5631413 Fluid holdup tool and flow meter for deviated wells |
| 05/20/1997 | US5630477 Downcrowdable telescopic augering apparatus |
| 05/14/1997 | CN1149902A Double walled insulated tubing and method for installing same |
| 05/13/1997 | US5628366 Protective arrangements for downhole tools |
| 05/07/1997 | EP0771934A2 Coupling for percussion rods |
| 05/07/1997 | EP0771400A1 Drill pipe with improved connectors |
| 05/07/1997 | EP0771388A1 Thread coupling |
| 05/06/1997 | US5626190 Apparatus for protecting electrical connection from moisture in a hazardous area adjacent a wellhead barrier for an underground well |
| 05/02/1997 | EP0631645A4 Down reaming apparatus. |
| 05/01/1997 | CA2188717A1 Method and apparatus for downhole fluid blast cleaning of oil well casing |
| 05/01/1997 | CA2188716A1 Downhole oil well tool running and pulling with hydraulic release using deformable ball valving member |
| 04/30/1997 | CN2253389Y Drawing drill fr use in desert |
| 04/30/1997 | CN1148659A Method for production of coal petrography boring bar by using waste track steel |
| 04/29/1997 | US5624209 Land reclamation method and equipment involving the introduction and mixing of a fluid and substances dispersed in air |
| 04/23/1997 | EP0769606A1 Exploration device for a subterranean formation traversed by a horizontal well comprising a plurality of sensors |
| 04/23/1997 | EP0682738B1 Drilling apparatus |
| 04/23/1997 | EP0629259B1 A method and a device for sealing between a casing and a drill hole in rock drilling operations |
| 04/23/1997 | CN2252878Y Bit guider |
| 04/23/1997 | CN1148131A Equipment for evenly placing drilling rod into well |
| 04/22/1997 | US5622231 Cutting head |
| 04/22/1997 | US5622211 Preperforated coiled tubing |
| 04/22/1997 | CA2123293C Movable joint bent sub |
| 04/17/1997 | WO1997013952A1 Well tubing and pump rod protector |
| 04/17/1997 | WO1997013951A1 Drill pipe/casing protector assembly |
| 04/16/1997 | CN2252234Y Sucker rod straightening cleaning plant |
| 04/16/1997 | CN1147781A Method for facing a substrate |
| 04/09/1997 | EP0767335A1 Threaded joint for tubes |
| 04/05/1997 | CA2159886A1 Drill stabilizer |
| 04/03/1997 | WO1997012166A1 Composite spoolable tube |
| 04/03/1997 | WO1997012121A1 Subsurface pneumatic hammer |
| 04/03/1997 | WO1997012116A1 Coiled tubing friction reducer |
| 04/03/1997 | WO1997012115A2 Composite coiled tubing end connector |
| 04/03/1997 | CA2687548A1 Composite spoolable tube |
| 04/02/1997 | EP0765427A1 Hinged drilling tool |
| 04/02/1997 | EP0621919B1 Down-the-hole rock drill |
| 04/02/1997 | CN2251037Y Tri-cone rotary drilling rod |
| 04/01/1997 | US5615977 For coupling an offshore platform to a subsea location on a seabed |
| 04/01/1997 | US5615976 Double walled pipe, jacking method and pipe end structure of leading pipe |
| 04/01/1997 | US5615740 Casting assembly for use in drilling lateral boreholes |
| 03/27/1997 | WO1997011303A1 Locking joint |
| 03/27/1997 | WO1997011253A1 Single bore riser system |
| 03/27/1997 | CA2229805A1 Locking joint |
| 03/26/1997 | CN2250417Y High-pressure fishing crashing casing plug |
| 03/26/1997 | CN2250416Y Anti-slip hollow sucker rod |
| 03/26/1997 | CN1145976A Chuck for rock drill |
| 03/25/1997 | US5613561 Apparatus for sealing instruments in a downhole tool |
| 03/25/1997 | US5613559 Decentralizing centralizing locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 03/25/1997 | US5613556 Rod guide and method of an apparatus for installing it on the shank of a rod |
| 03/19/1997 | EP0624225B1 Multi-arm stabilizer for a drilling or boring device |
| 03/18/1997 | CA2129614C Coiled tubing concentric gas lift assembly |
| 03/16/1997 | CA2185048A1 Elevated electrical connector assembly |
| 03/13/1997 | WO1997009509A1 Shoe for use in the construction of oil and gas wells |
| 03/12/1997 | EP0760898A1 Double walled insulated tubing and method of installing same |
| 03/12/1997 | EP0760896A1 A well entry tool |
| 03/11/1997 | US5609457 Pipe alignment apparatus for use on wellhead derrick |
| 03/11/1997 | US5609204 Isolation system and gravel pack assembly |
| 03/06/1997 | WO1997008425A1 Self-centering system for a tool travelling through a tubular member |
| 03/06/1997 | WO1997008424A1 Downhole tool system |
| 03/06/1997 | WO1997008423A1 Friction-reducing drill pipe component |