| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/14/1999 | EP0928361A1 Safety joint |
| 07/14/1999 | EP0928360A1 Drill shank for a drill drive |
| 07/14/1999 | EP0928359A1 Marine riser and method of use |
| 07/14/1999 | EP0928353A1 A method in piling tubular bases, a combined drilling and piling rig, as well as use of the drill hammer of said rig |
| 07/14/1999 | CN2328784Y Connector for hollow sucker rod |
| 07/14/1999 | CN1222948A Heated offshore pipeline and method of manufacturing |
| 07/13/1999 | US5921591 Pipe connecting assembly and method for joining two lengths of pipe by a press-fit connection |
| 07/13/1999 | US5921332 For drilling a hole |
| 07/13/1999 | US5921316 Automatic drill pipe cleaning system and method of use |
| 07/13/1999 | US5921285 Composite spoolable tube |
| 07/13/1999 | CA2151179C Well rod centralizer/centralizer stop interface with wear reducing surface |
| 07/09/1999 | CA2258379A1 Apparatus and methods for deploying tools in multilateral wells |
| 07/08/1999 | WO1999034092A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 07/08/1999 | WO1999034090A1 Off-line mud circulation during lithosphere drilling |
| 07/08/1999 | WO1999034087A1 Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore |
| 07/08/1999 | WO1999023345A3 Mill for use in a wellbore and method of milling |
| 07/08/1999 | CA2318500A1 Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore |
| 07/07/1999 | EP0927294A1 Coupling piece for use at simultaneous earth and/or rock drilling with an upper rotary percussion device and a lower percussion device |
| 07/07/1999 | EP0927085A1 In situ deep remediation injection system & method |
| 07/06/1999 | US5920032 Continuous power/signal conductor and cover for downhole use |
| 07/06/1999 | US5919578 Friction welded product and method for manufacturing thereof |
| 07/06/1999 | US5918677 Method of and apparatus for installing the casing in a well |
| 07/06/1999 | US5918675 Apparatus for creating two wells in a single conductor |
| 07/06/1999 | US5918674 Casing and method of installing the casing in a well |
| 06/30/1999 | EP0926310A1 Apparatus and method for injecting treatment fluids into an underground formation |
| 06/30/1999 | CN2326724Y Oil-well casing-pipe righting and spiral-flow generating apparatus |
| 06/23/1999 | CN2325582Y Universal coupling having slidably-interengaging teeth |
| 06/23/1999 | CN2325506Y Sucker rod stabilizer to prevent it from being eccentrically worn |
| 06/23/1999 | CN1220717A Device for limiting bending radius of flexible duct |
| 06/23/1999 | CN1220716A Threaded joint for tubes |
| 06/22/1999 | US5913337 Spoolable composite tubular member with energy conductors |
| 06/22/1999 | CA2064429C Sealing device for expansion joints cut in dams |
| 06/17/1999 | WO1999029997A1 Apparatus for drilling lateral drainholes from a wellbore |
| 06/17/1999 | DE19813902C1 Method of monitoring a telescopic bore rod |
| 06/17/1999 | CA2256102A1 Downhole tool actuator |
| 06/16/1999 | EP0922153A1 A drill pipe |
| 06/16/1999 | CN1219638A Lower drilling rig combination and its drilling method |
| 06/15/1999 | US5911283 For coupling a drive to an output |
| 06/15/1999 | CA2133430C Sub-assembly for dust suppression in rock drilling |
| 06/15/1999 | CA2107210C Retrievable bridge plug and a running tool therefor |
| 06/15/1999 | CA2076066C Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly |
| 06/10/1999 | WO1999028665A1 Pipe joint |
| 06/10/1999 | WO1999028587A1 Drilling system including eccentric adjustable diameter blade stabilizer |
| 06/10/1999 | WO1999006193A3 Rotary drill arrangement |
| 06/10/1999 | DE19748580C1 Combination geotechnical depth probe with detachable probe head |
| 06/09/1999 | EP0920569A1 Centralizer |
| 06/09/1999 | EP0788578B1 2-stage underreamer |
| 06/09/1999 | EP0712499A4 Improved slick line system with real-time surface display |
| 06/09/1999 | EP0666960B1 Flexible riser system |
| 06/09/1999 | CN2323133Y Semi-threaded remote-adjusted drilling tool centralizer |
| 06/09/1999 | CN2323132Y Track type remote-adjusted drilling tool centralizer |
| 06/09/1999 | CN2323131Y Braid type casing centralizer |
| 06/09/1999 | CN2323130Y Lantern type casing centralizer |
| 06/09/1999 | CN2323129Y Spin pumping rod wear resisting coupling |
| 06/09/1999 | CN2323128Y Borehole combined drilling tool for superhigh pressure jet drilling |
| 06/08/1999 | CA2180047C Internal pressure sleeve for use with easily drillable exit ports |
| 06/03/1999 | WO1999027228A1 Tool cooling system |
| 06/03/1999 | WO1999027223A2 Method and apparatus for injecting coil tubing down pipelines |
| 06/03/1999 | WO1999006194A3 Rotary spade drill arrangement |
| 06/02/1999 | EP0919694A2 Method and apparatus for perforating a well |
| 06/02/1999 | EP0811111B1 Downhole tool |
| 06/02/1999 | EP0742867B1 Drilling bit assembly and apparatus |
| 06/02/1999 | CN2321937Y Drilling rod for drilling rig |
| 06/02/1999 | CN1218532A Removable guide member for guiding drill string components in drill hole |
| 06/01/1999 | US5908212 Oilfield tubular threaded connection |
| 06/01/1999 | US5908072 Non-metallic centralizer for casing |
| 06/01/1999 | US5908049 Spoolable composite tubular member with energy conductors |
| 05/27/1999 | WO1999025949A2 Improvements in or relating to downhole tools |
| 05/25/1999 | US5906399 Threaded joint for metal tubes with internal coating |
| 05/25/1999 | US5906242 Method of suspending and ESP within a wellbore |
| 05/25/1999 | CA2134273C Spoolable coiled tubing completion system |
| 05/20/1999 | WO1999024690A1 A friction reducing tool |
| 05/20/1999 | WO1999024688A2 Adjustable stabilizer for directional drilling |
| 05/19/1999 | EP0916883A1 Screw joint for oil well pipe |
| 05/19/1999 | CN2319563Y Soft rock drill rod |
| 05/18/1999 | US5904445 Umbilical line stand-off assembly for marine riser assembly |
| 05/18/1999 | US5904444 Propelling apparatus for underground propelling construction work |
| 05/18/1999 | US5904213 For connection to a drill string and drilling boreholes in subsurfaces |
| 05/14/1999 | WO1999023355A1 Coiled tubing sensor system for delivery of distributed multiplexed sensors |
| 05/14/1999 | WO1999023346A1 Anti-whirl drilling improvement |
| 05/14/1999 | WO1999023345A2 Mill for use in a wellbore and method of milling |
| 05/12/1999 | DE19748987A1 Rotary-percussive stone drill for breakthrough work |
| 05/12/1999 | CN2318389Y Casing joint |
| 05/12/1999 | CN2318388Y Integral seat sealed type two-stage casing-joint |
| 05/11/1999 | US5901798 For a pipe string movable within the bore of a well |
| 05/06/1999 | EP0912289A1 Friction welded drill rod and method for manufacturing the rod |
| 05/05/1999 | CN2317306Y Sucker rod centering guide |
| 05/05/1999 | CN1215789A Well system |
| 05/04/1999 | US5899507 Fitting for coupling two lengths of pipe |
| 05/04/1999 | US5899283 Drill bit for horizontal directional drilling of rock formations |
| 05/04/1999 | US5899282 Deep-drilling apparatus with hydrostatic coupling |
| 04/29/1999 | WO1999020871A1 Flexible sinker bar assemblies |
| 04/29/1999 | WO1999008034A9 Tubular connection |
| 04/28/1999 | EP0911483A2 Well system including composite pipes and a downhole propulsion system |
| 04/28/1999 | EP0911482A2 Stress relief joints for risers |
| 04/28/1999 | EP0910723A1 Device for limiting the bending radius of a flexible duct |
| 04/27/1999 | US5896925 Tool protection guide |
| 04/27/1999 | CA2125535C High strength austenitic stainless steel having excellent galling resistance |
| 04/22/1999 | WO1999019653A1 Composite spoolable tube with sensor |
| 04/22/1999 | WO1999019598A1 Coupling for force-transmitting device |