| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 05/20/1992 | EP0486449A1 Drill string component |
| 05/19/1992 | CA1301147C Apparatus for controlling the operation of a downhole tool |
| 05/19/1992 | CA1301057C Tubing collar |
| 05/14/1992 | WO1992008036A1 Device to eliminate and prevent deposition of paraffin and hydrates in wells |
| 05/13/1992 | EP0485080A1 Locking tube connection |
| 05/13/1992 | EP0484392A1 Threaded tubular connection |
| 05/13/1992 | CN2104292U Damping mousing unit of sucker rod |
| 05/13/1992 | CN1061069A Oil tool release joint |
| 05/12/1992 | US5111892 Imbalance compensated drill bit with hydrostatic bearing |
| 05/12/1992 | US5111884 Method and apparatus for reworking wells |
| 05/06/1992 | CN2103631U Spray-preventing joint for kellies |
| 05/06/1992 | CN2103630U Trapezoidal kerf sieve tube |
| 05/06/1992 | CN2103629U Drilling rod cleaner |
| 05/05/1992 | US5110644 Composition material tube substantially insensitive to the variations of length under the effect of the internal pressure |
| 05/05/1992 | US5109935 Rotary drill bits |
| 05/05/1992 | US5109923 Wellhead bowl protector |
| 05/05/1992 | US5109921 Controlled weak point for wireline cable |
| 05/05/1992 | CA1299999C Method of cementing a casing in a wellbore |
| 04/30/1992 | WO1992007163A1 Method and device for absorbing vibration in a rotating drill pipe string |
| 04/29/1992 | EP0482892A1 Apparatus for preventing separation of a down-hole motor from a drill string |
| 04/29/1992 | CN2103002U Waterpower anchor |
| 04/28/1992 | US5107941 Kelly saver drive |
| 04/28/1992 | US5107927 Orienting tool for slant/horizontal completions |
| 04/28/1992 | CA1299559C Expandable stabilizer |
| 04/28/1992 | CA1299349C Process and device for screwing a threaded joint in a tube having screwing stops |
| 04/27/1992 | CA2054156A1 Low torque centralizer |
| 04/27/1992 | CA2053683A1 Apparatus for preventing separation of a down-hole motor from a drill string |
| 04/22/1992 | EP0481261A2 Pipe connection, especially for drill pipes |
| 04/22/1992 | CN2102364U Anti-abrasion corrector of oil well pumping rod connection clip |
| 04/21/1992 | US5105890 Apparatus for altering the length of a downhole tool assembly |
| 04/16/1992 | WO1992006322A1 Rotational connectors |
| 04/16/1992 | WO1992006269A1 Release joint |
| 04/15/1992 | EP0479927A1 Drill string component. |
| 04/15/1992 | CN2101744U Stabilizer of hart fased brock type drill |
| 04/15/1992 | CN2101743U High-silicon iron casting anode for deep-well |
| 04/14/1992 | US5104263 Underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 04/14/1992 | US5103900 High pressure adapter for well-heads |
| 04/14/1992 | CA1298715C Shear coupling assembly |
| 04/09/1992 | DE4038424C1 Kelly borehole drilling arrangement - involves telescopically nested pipes connected to drill head |
| 04/09/1992 | DE4032065A1 Boring tool for use in mining - has drive shaft and cutting head positively locked together and forming secure and simple connection |
| 04/09/1992 | DE4032064A1 Drill crown used in mining - has shaft with cone-shaped faceted end and suitably recessed head |
| 04/08/1992 | CN2101101U Aluminium drill rod joint |
| 04/08/1992 | CN2101021U Mud core drivepipe head |
| 04/08/1992 | CN1016205B Drill |
| 04/07/1992 | US5101918 High pressure pipe and device for making a hole in the ground, provided with such high pressure pipe |
| 04/07/1992 | US5101915 Adjustable angle pipe joint |
| 04/07/1992 | US5101906 Horizontal drilling or completion method |
| 04/07/1992 | US5101899 Recovery of petroleum by electro-mechanical vibration |
| 04/07/1992 | US5101896 Pipe wiper and washer system |
| 04/07/1992 | US5101676 Attachment for sucker rod depth adjustment |
| 04/02/1992 | WO1992005533A1 Identifying metal articles |
| 04/01/1992 | CN2100477U Rigid continuous sucker rod |
| 03/31/1992 | US5099934 Rotary drill bits |
| 03/31/1992 | US5099929 Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes |
| 03/25/1992 | EP0476814A1 Method of protecting casing during high pressure well stimulation |
| 03/25/1992 | CN2099833U Integral type electrothermal oil pumping rod column |
| 03/25/1992 | CN2099832U Vertically inserted type hollow oil-pumping rod |
| 03/24/1992 | US5097905 Centralizer for well casing |
| 03/24/1992 | US5097871 Pipe for pipe jacking |
| 03/24/1992 | US5097870 Composite tubular member with multiple cells |
| 03/24/1992 | CA1297782C Gravel packing system for a production radial tube |
| 03/21/1992 | CA2049183A1 Method of protecting casing during high pressure well stimulation |
| 03/17/1992 | US5095993 Anchor apparatus for a tubing and wireline conveyed method and apparatus |
| 03/17/1992 | US5095981 Casing centralizer |
| 03/11/1992 | CN2098548U Locking joint of sucker rod made of glass fibre reinforced plastics |
| 03/11/1992 | CN1015808B Method for well drilling |
| 03/10/1992 | US5094568 Offshore support structure method and apparatus |
| 03/10/1992 | US5094567 Flexible column from composite material |
| 03/10/1992 | US5094103 Steam quality and flow rate measurement |
| 03/10/1992 | CA1296999C Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing |
| 03/10/1992 | CA1296998C Process and equipment for oil well drilling and completing operations in deep water |
| 03/08/1992 | WO1992004525A1 Pipe system with electrical conductors |
| 03/08/1992 | CA2091070A1 Pipe system with electrical conductors |
| 03/05/1992 | DE4126426A1 Reset moment free roller or disc drill head - has motor and drill on common mounting in direct drive contact |
| 03/04/1992 | EP0473369A1 Process of and apparatus for electric pipeline heating |
| 03/04/1992 | CN1015729B Test technology for thermally cyclic parallel-pipe oil extraction |
| 03/03/1992 | US5092635 Buttress thread form |
| 03/03/1992 | US5092423 Downhole seismic array system |
| 03/03/1992 | US5092411 Drilling apparatus |
| 03/03/1992 | US5092403 Packer centralizing device |
| 03/03/1992 | CA1296620C Selectively releasable and reengagable expansion joint for subterranean well tubing strings |
| 02/27/1992 | DE4026509A1 Borehole piston pump drive rod subjected only to tensile loads - is made from high tensile plastic material and only subjected to tensile load |
| 02/26/1992 | EP0280705B1 Process and device for producing drilling holes from an angled position in relation to the drilling axes |
| 02/25/1992 | US5090737 Downhole energizable seal for telescoping joints |
| 02/25/1992 | US5090500 Replaceable wear sleeve for percussion drill |
| 02/19/1992 | EP0471600A1 Method of manufacture of a data transmission cable |
| 02/19/1992 | CN2096636U Anti-break apparatus for sucker rod |
| 02/19/1992 | CN1058824A Low friction subterranean drill bit and related methods |
| 02/18/1992 | US5090039 Inspecting coiled tubing for well operations |
| 02/18/1992 | US5088853 Connector |
| 02/18/1992 | US5088638 Method for making sucker rods |
| 02/13/1992 | DE4027414C1 Tubular rock bore drill stem - has concentric channels for fluids and has spring-loaded control valves |
| 02/13/1992 | DE4025243A1 Drill rod assembly for exploratory and other drilling - has hollow drill rods having continuous outer spirals, clear internal passages, polygonal ends and spring-loaded locking pins |
| 02/12/1992 | EP0470576A1 Apparatus for deploying and energizing submergible motor downhole |
| 02/11/1992 | US5086854 Drill pipes for rotary-vibratory drills |
| 02/11/1992 | US5086844 Hydraulic release oil tool |
| 02/11/1992 | US5086843 Oil tool release joint |
| 02/07/1992 | CA2048497A1 Apparatus for deploying and energizing submergible electric motor downhole |
| 02/05/1992 | EP0469317A2 Method and device for modifying the weight on an earth frill bit |
| 02/05/1992 | EP0469133A1 Device for delivering corrosion or deposition inhibiting agents into a well by means of an auxiliary delivery tube. |