| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 10/18/1994 | US5355950 Centraliser |
| 10/18/1994 | CA2020975C Two-way plugs for wells |
| 10/13/1994 | WO1994023176A1 Wireline wet connect |
| 10/13/1994 | WO1994023174A1 High angle and horizontal wellbore centralizer and method of use |
| 10/13/1994 | DE4333114C1 Drilling apparatus with telescopic kelly bar |
| 10/12/1994 | CN2179455Y 插接式钻杆接头 Plug-in drill pipe joints |
| 10/11/1994 | US5353884 Positioning device for a member and drilling system employing said positioning device |
| 10/05/1994 | CN2178781Y Ratational flow self-swash waterpower oscillating casing shoes |
| 10/05/1994 | CN2178780Y Anti-drop apparatus for sucker rod |
| 10/05/1994 | CN1026144C Method of installing well conductors |
| 10/04/1994 | US5352406 Containing specified amounts of carbon, chromium, nickel, molybdenum, tungsten, copper, nitrogen, manganese, phosphorus, sulfur, silicon |
| 10/04/1994 | US5351752 For extracting oil and the like from an underground source |
| 10/01/1994 | CA2120108A1 Internally sealable perforable nipple for downhole well applications |
| 09/29/1994 | WO1994021888A1 Annular chamber seal |
| 09/29/1994 | WO1994021884A1 Clamshell grab for drilling cylindrical holes |
| 09/28/1994 | CN2178276Y Centralising device for drilling pipe column |
| 09/27/1994 | US5350028 Device for adjusting the path of a rotary drilling tool |
| 09/27/1994 | US5350024 Drill pipe |
| 09/27/1994 | CA2117044A1 Electrical submersible pump discharge head |
| 09/21/1994 | EP0615572A1 Downhole adjustable stabilizer and method |
| 09/21/1994 | CN2177796Y Sleeve jointing centralising device |
| 09/21/1994 | CN2177795Y Socket cable type three-phase AC electrothermic sucker rod |
| 09/21/1994 | CN2177794Y Hollow sucker rod |
| 09/20/1994 | US5348668 Coating and bonding composition |
| 09/20/1994 | US5348492 Bracket and connector for a cable inserted into a pipe for enabling a measurement in the cable |
| 09/20/1994 | US5348351 Coupling apparatus |
| 09/20/1994 | US5348350 Pipe coupling |
| 09/20/1994 | US5348097 Device for carrying out measuring and servicing operations in a well bore, comprising tubing having a rod centered therein, process for assembling the device and use of the device in an oil well |
| 09/20/1994 | US5348096 Anisotropic composite tubular emplacement |
| 09/20/1994 | US5348092 Gravel pack assembly with tubing seal |
| 09/20/1994 | US5348091 Self-adjusting centralizer |
| 09/20/1994 | US5348088 Coiled tubing external connector with packing element |
| 09/20/1994 | US5348084 Device for carrying out measuring and servicing operations in a well bore and use in an oil well |
| 09/15/1994 | WO1994020730A1 Double wall pipe for propulsion technique and construction of pipe end of leading pipe |
| 09/15/1994 | WO1994020727A1 Guide assembly and method |
| 09/15/1994 | WO1994020726A1 Dual body drillpipe for use in so-called counterflush drilling methods |
| 09/14/1994 | EP0614731A1 Tool and toolchuck for handtools |
| 09/14/1994 | EP0614506A1 Downhole stabiliser |
| 09/14/1994 | CN2177086Y Thread self adjustable oil suck rod drill collar |
| 09/13/1994 | US5346026 Rolling cone bit with shear cutting gage |
| 09/13/1994 | US5346016 Apparatus and method for centralizing pipe in a wellbore |
| 09/13/1994 | CA1331984C Accelerator for fishing jar with hydrostatic assist |
| 09/07/1994 | EP0614034A1 Hose having means for the visual early detection of a malfunction and its end flanges |
| 09/07/1994 | CA2116936A1 Tool bit and tool bit chuck for hand tools |
| 09/06/1994 | US5343967 Apparatus for optional straight or directional drilling underground formations |
| 09/06/1994 | US5343965 Apparatus and methods for horizontal completion of a water well |
| 09/06/1994 | US5343953 Through-tubing recirculating tool assembly for well completions |
| 09/06/1994 | US5343949 Isolation washpipe for earth well completions and method for use in gravel packing a well |
| 09/06/1994 | US5343942 Submersible pump line protector |
| 09/04/1994 | CA2116811A1 Flexible pipe comprising means for the early visual detection of defects, and end attachments |
| 08/31/1994 | EP0612913A1 Connector assembly for coiled tubing |
| 08/31/1994 | EP0612370A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 08/31/1994 | CN2175824Y Rigid swiral centralising device |
| 08/31/1994 | CN2175823Y Friction-type dog catch for feeding rod |
| 08/30/1994 | US5341888 Drilling tool intended to widen a well |
| 08/25/1994 | CA2116301A1 Flow control assembly for coiled tubing |
| 08/24/1994 | EP0611875A1 Forward thrust pipeline and corresponding forward thrust pipe |
| 08/24/1994 | CN2175302Y Device for centralising drilling bar |
| 08/24/1994 | CN2175301Y Pressure difference type kelly bar joint with spraying proof function |
| 08/23/1994 | US5339914 Adjustable drilling mechanism |
| 08/23/1994 | US5339910 Drilling torsional friction reducer |
| 08/23/1994 | US5339896 Field installable rod guide and method |
| 08/23/1994 | CA1331539C Torque position makeup of tubular connections |
| 08/17/1994 | CN2174559Y Casing head |
| 08/16/1994 | US5337843 Hole opener for the top hole section of oil/gas wells |
| 08/16/1994 | US5337842 Drill steel |
| 08/16/1994 | US5337829 Hydraulic release tool |
| 08/16/1994 | US5337823 Preform, apparatus, and methods for casing and/or lining a cylindrical volume |
| 08/10/1994 | CN2173860Y Drill rod |
| 08/09/1994 | US5335727 Fluid loss control system for gravel pack assembly |
| 08/09/1994 | US5335723 Combination scratcher-centralizer for wellbore casings |
| 08/02/1994 | US5334801 Pipe system with electrical conductors |
| 08/02/1994 | US5334268 Method of producing high strength sucker rod coupling |
| 08/02/1994 | US5333911 Connector |
| 07/26/1994 | US5332049 Composite drill pipe |
| 07/26/1994 | CA2032830C Coupling |
| 07/26/1994 | CA1330935C Drill string equipment with a lateral light sleeve using a cable safety anchoring member on a support and method thereof |
| 07/21/1994 | DE4243353A1 Propulsion tube connection for underground shield drive |
| 07/19/1994 | US5330294 Riser for a great water depth |
| 07/19/1994 | US5330293 Floating production and storage facility |
| 07/19/1994 | US5330239 Pipe coupling |
| 07/19/1994 | US5330016 Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling |
| 07/19/1994 | US5330001 Lead in guide assembly |
| 07/14/1994 | CA2113292A1 Submersible pump line protector |
| 07/12/1994 | US5327974 Method and apparatus for removing debris from a wellbore |
| 07/07/1994 | WO1994015061A1 Apparatus and method of perforating wellbores |
| 07/07/1994 | WO1994015058A1 Drill bit having chip breaker polycrystalline diamond compact and hard metal insert at gauge surface |
| 07/06/1994 | EP0605071A1 Tubing with threaded tubes and a connection sleeve |
| 07/06/1994 | EP0604526A1 Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 07/06/1994 | EP0390932B1 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 07/05/1994 | USH1329 Drill collar connections |
| 07/05/1994 | US5325932 Stabilizer for a rock boring apparatus |
| 07/05/1994 | US5325923 Well completions with expandable casing portions |
| 07/05/1994 | US5325714 Steerable motor system with integrated formation evaluation logging capacity |
| 06/29/1994 | EP0604362A1 Drill unit with tubular head and connector |
| 06/29/1994 | CA2112424A1 Pipeline with threaded pipes and a sleeve connecting the same |
| 06/28/1994 | US5324145 Tool bit and chuck for use in percussion drilling and chiseling |
| 06/28/1994 | US5323860 Apparatus for connecting a diverter assembly to a blowout preventer stack |
| 06/28/1994 | US5323853 For use in a well conduit |
| 06/28/1994 | US5323852 Torque limiter for auger gravel pack assembly |