Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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01/13/1998 | US5706897 Drilling, production, test, and oil storage caisson |
01/13/1998 | US5706892 Downhole tools for production well control |
01/08/1998 | WO1998000626A1 Method for expanding a steel tubing and well with such a tubing |
01/07/1998 | EP0816628A1 Casing centraliser |
01/07/1998 | EP0816627A2 Underground drilling method |
01/07/1998 | EP0815377A1 Threaded pipe connection |
01/07/1998 | EP0815342A1 Improved casing shoe |
01/07/1998 | EP0815341A1 Dual bore riser |
01/07/1998 | EP0815340A1 Rock drilling tool, drill bit and a method of transferring percussive energy |
01/07/1998 | EP0527890B1 Oilfield equipment identification apparatus |
01/07/1998 | CN2272046Y Quick-connecting joint of large diameter drilling rod |
01/07/1998 | CN1169765A A drilling method and bit assembly to realise method |
01/06/1998 | US5704393 Coiled tubing apparatus |
01/02/1998 | DE19626223A1 Kelly string with latching assemblies |
12/31/1997 | WO1997049520A1 Friction welded drill rod and method for manufacturing the rod |
12/31/1997 | CN2271609Y Hinged joint of petroleum boxing |
12/31/1997 | CA2257488A1 Friction welded drill rod and method for manufacturing the rod |
12/30/1997 | US5702205 Steel catenary riser system for marine platform |
12/30/1997 | CA2134154C Coiled tubing with signal transmitting passageway |
12/24/1997 | WO1997048876A1 Rolling cone bit having gage and nestled gage cutter elements having enhancements in materials and geometry to optimize borehole corner cutting duty |
12/24/1997 | WO1997048875A1 Down-the-hole hammer |
12/24/1997 | WO1997048516A1 Friction welded drill rod and method for manufacturing the rod |
12/24/1997 | CA2254760A1 Friction welded drill rod and method for manufacturing the rod |
12/23/1997 | US5700376 Method and apparatus for magnetically treating flowing liquids |
12/23/1997 | US5700161 Two-piece lead seal pothead connector |
12/23/1997 | US5699996 Method for placing cable within coiled tubing |
12/23/1997 | US5699867 Bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill |
12/23/1997 | US5699866 Sectional drive system |
12/23/1997 | CA2061695C Rod guide remover |
12/18/1997 | WO1997047848A1 Drilling apparatus |
12/17/1997 | EP0812976A2 Underground apparatus for directional drilling without earth removal |
12/17/1997 | CN2270804Y Adjustable underground elbow connection device |
12/16/1997 | US5697768 Downhole swivel |
12/16/1997 | US5697461 Rotary drill bit having a non-rotating gauge section |
12/16/1997 | US5697460 Drill pipe for directional drilling |
12/16/1997 | US5697447 Flexible risers with stabilizing frame |
12/11/1997 | WO1997046785A1 Indexing percussive drilling bit |
12/11/1997 | CA2257210A1 Indexing percussive drilling bit |
12/10/1997 | EP0811746A2 A device for suspending flexible and semi-flexible pipes on structures at sea |
12/10/1997 | EP0811111A1 Downhole tool |
12/10/1997 | EP0811109A1 Metal coiled tubing with signal transmitting passageway |
12/10/1997 | EP0811107A1 Position detection devices |
12/10/1997 | CN1167517A Coupling for anchor bars |
12/09/1997 | US5695018 Earth-boring bit with negative offset and inverted gage cutting elements |
12/09/1997 | US5695009 Downhole oil well tool running and pulling with hydraulic release using deformable ball valving member |
12/09/1997 | US5695008 Preform or matrix tubular structure for casing a well |
12/08/1997 | CA2178544A1 Non-metallic oil well tubing system |
12/05/1997 | CA2206916A1 Fluid pressure deactivated thru-tubing centralizer |
12/04/1997 | WO1997045620A1 Stabiliser for borehole drilling apparatus |
12/04/1997 | CA2253503A1 Stabiliser for borehole drilling apparatus |
12/02/1997 | US5692563 Tubing friction reducer |
12/02/1997 | US5692562 Well rod, centralizer and centralizer stop interfaces with wear reducing surface |
11/27/1997 | WO1997044564A1 Drilling apparatus |
11/26/1997 | EP0808987A2 Hydraulic downhole hammer |
11/26/1997 | EP0708872A4 Method and apparatus for controlling the head of a drilling or core-drilling device |
11/26/1997 | CN1165924A Guided drilling system with shock absorber |
11/25/1997 | US5689871 Couplings for standard A.P.I. tubings and casings and methods of assembling the same |
11/24/1997 | CA2206017A1 Downhole drill bit drive motor assembly with an integral bilateral signal and power conduction path |
11/20/1997 | WO1997043517A1 Washpipe stabilisation |
11/20/1997 | WO1997043516A1 Slip joint |
11/20/1997 | WO1997043515A1 Drill bit retainer for a down hole hammer assembly |
11/20/1997 | WO1997043514A1 Sectional drive system |
11/20/1997 | DE19619957A1 Pipes for drinking water treatment, drainage wells, irrigation or water=wheels comprising quartz sand and poly:urethane binder |
11/20/1997 | CA2254346A1 Sectional drive system |
11/20/1997 | CA2253753A1 Washpipe stabilisation |
11/19/1997 | CN2268124Y Sucker-rod joint clamping head |
11/19/1997 | CN2268123Y Lang pump-cylinder sucker rod oil-producing sucker-rod sealing device |
11/18/1997 | US5687999 Threaded joint for tubes |
11/11/1997 | US5685574 Snap latch seal locator for sealingly latching tubing to a packer in a wellbore |
11/11/1997 | US5685381 Drill rod and drill bit with rocking connection |
11/11/1997 | US5685370 Dual-bore, antirotating pump assembly |
11/06/1997 | WO1997041377A1 Tubing connector |
11/06/1997 | WO1997041330A2 Multi-lateral wellbore system and method for forming same |
11/06/1997 | WO1997032110A3 Downhole core sampling and testing apparatus |
11/06/1997 | CA2499225A1 Multi-lateral wellbore systems and methods for forming same |
11/05/1997 | EP0805257A2 Guided drilling system with shock absorber |
11/04/1997 | US5683205 In floating systems |
11/04/1997 | US5682956 Dual member pipe joint for a dual member drill string |
11/04/1997 | US5682952 Extendable casing circulator and method |
11/04/1997 | CA2131859C Rotary piston well tool |
10/30/1997 | DE19616751A1 Counterboring drill |
10/29/1997 | EP0803637A2 Pipe connector device with pin and box members having corresponding frusto-conical surfaces |
10/28/1997 | US5681059 Pipe connector |
10/23/1997 | WO1997039506A1 Underground well electrical cable transition, seal and method |
10/23/1997 | WO1997039219A1 Apparatus and method for downhole drilling communications |
10/23/1997 | WO1997039218A1 Downhole electrode for well guidance system |
10/23/1997 | WO1997025561A3 Subsea flexible pipe |
10/23/1997 | CA2252400A1 Apparatus and method for downhole drilling communications |
10/22/1997 | EP0802302A1 Riser that is to be detached near the water surface |
10/21/1997 | US5680049 Apparatus for measuring formation resistivity through a conductive casing having a coaxial tubing inserted therein |
10/21/1997 | US5679894 Apparatus and method for drilling boreholes |
10/21/1997 | US5678644 Bi-center and bit method for enhancing stability |
10/21/1997 | US5678630 Directional drilling apparatus |
10/21/1997 | US5678608 Anti-seizure protection for joints, particularly suitable for the petroleum sector |
10/16/1997 | WO1997038206A1 Reaming tool for rock drilling and a device therefor |
10/15/1997 | EP0800614A1 Downhole electricity transmission system |
10/15/1997 | EP0800609A1 A drilling method and bit assembly to realize the method |
10/14/1997 | US5676501 Drill bit tube |
10/14/1997 | US5676327 Device for storing and for handling a rod made of composite |
10/14/1997 | US5676212 Downhole electrode for well guidance system |