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