| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/31/1993 | EP0241521B1 Seal for threaded pipe connection |
| 03/30/1993 | CA1315272C Drilling apparatus |
| 03/23/1993 | US5195586 Right-hand on and right-hand off retrieving head |
| 03/23/1993 | CA1314863C Universal joint arrangement for downhole tools |
| 03/23/1993 | CA1314808C Ratcheting and threaded well connector |
| 03/18/1993 | WO1993005271A1 Process and device for measuring cable drilled bores |
| 03/18/1993 | WO1992017679A3 Hydraulic release oil tool |
| 03/18/1993 | DE4200580A1 Gesteinsbohrkrone Gesteinsbohrkrone |
| 03/18/1993 | DE4131099A1 Porous components e.g. pipes for dewatering uses |
| 03/17/1993 | EP0532324A1 In-the-hole drill inner tube rod |
| 03/16/1993 | US5193626 Drilling device |
| 03/16/1993 | US5193614 Cable anchor assembly |
| 03/14/1993 | CA2078035A1 In-the-hole drill inner tube rod |
| 03/10/1993 | EP0531038A2 Packer for telescopic riser joint |
| 03/09/1993 | US5191938 Rod guide assembly and method of its installation on a rod shank |
| 03/09/1993 | CA1314240C Cable clamp for coiled tubing |
| 03/04/1993 | WO1993004258A1 A double-acting accelerator for use with hydraulic drilling jars |
| 03/03/1993 | EP0530029A2 Method and apparatus for installing electrical logging cable inside coiled tubing |
| 03/02/1993 | US5191173 Electrical cable in reeled tubing |
| 03/02/1993 | US5191156 Drill string enclosure |
| 03/02/1993 | US5190114 Flow pulsing apparatus for drill string |
| 02/25/1993 | DE4127992A1 Beton-kunststoff-verbundrohr, verfahren zu seiner herstellung und seine verwendung als vortriebsrohr Concrete-plastic composite pipe, process for its production and its use as a power-tube |
| 02/24/1993 | EP0527932A1 Preform device and process for coating and/or lining a cylindrical volume |
| 02/24/1993 | EP0527890A1 Oilfield equipment identification apparatus |
| 02/23/1993 | US5188191 Shock isolation sub for use with downhole explosive actuated tools |
| 02/23/1993 | US5188187 Electrical grounding rod driving bit |
| 02/18/1993 | WO1993004257A2 Drilling pipe |
| 02/18/1993 | WO1993000500A3 Variable depth grooved drill string member |
| 02/18/1993 | WO1992017681A3 Retrievable bridge plug and a running tool therefor |
| 02/18/1993 | CA2093138A1 Drill pipe |
| 02/16/1993 | US5186500 Fiberglass tubular coupling with liner |
| 02/16/1993 | US5186268 Rotary drill bits |
| 02/16/1993 | US5186266 Multi-walled drill string for exploration-sampling drilling systems |
| 02/16/1993 | US5186264 Device for guiding a drilling tool into a well and for exerting thereon a hydraulic force |
| 02/16/1993 | US5186048 To evaluate the fluids produced by pumping from a formation interval well |
| 02/09/1993 | US5184688 Telescopic bar of drill rig |
| 02/09/1993 | US5184686 Method for offshore drilling utilizing a two-riser system |
| 02/09/1993 | US5184682 Device allowing measurements or interventions to be carried out in a well, method using the device and applications of the device |
| 02/09/1993 | US5184681 Telescoping riser joint and improved packer therefor |
| 02/08/1993 | CA2075271A1 Casing cementer with torque-limiting rotating positioning tool |
| 02/03/1993 | EP0525257A1 Gravel pack well completions with auger-screen |
| 01/27/1993 | EP0524206A1 Composite tubular member with multiple cells |
| 01/27/1993 | EP0524183A1 A borehole, as well as a method and an apparatus for forming it. |
| 01/27/1993 | EP0420961B1 Recoverable sleeve assembly for pipe joint |
| 01/26/1993 | US5182792 Process of electric pipeline heating utilizing heating elements inserted in pipelines |
| 01/26/1993 | US5181799 Offshore support structure apparatus |
| 01/26/1993 | US5181730 Sealing system for abutting tube ends in a pipe conduit |
| 01/26/1993 | US5181576 Downhole adjustable stabilizer |
| 01/26/1993 | US5181571 Well casing flotation device and method |
| 01/21/1993 | WO1993001390A1 Device for adjusting the path azimuth of a rotary drilling tool |
| 01/21/1993 | DE4123639A1 Toothed connection for assembling drill rods - comprises two opposing spherical segment bearings connecting a boss, allowing them to swivel about connection swivel centre |
| 01/21/1993 | CA2090676A1 Device for adjusting the path azimuth of a rotary drilling tool |
| 01/20/1993 | EP0523823A1 Use of machine oil for making a corrosion-resistant protactive coat at screw connections for oil-well pipes |
| 01/20/1993 | EP0523301A1 Wellhead casing suspension |
| 01/19/1993 | US5180021 Orientable stabilizer |
| 01/19/1993 | CA2074132A1 Method of producing a corrosion-protective layer on pipe threads |
| 01/19/1993 | CA1312854C Tube auger sections |
| 01/19/1993 | CA1312832C Electrical conductor arrangements for pipe system |
| 01/13/1993 | EP0522553A1 Drill bit having enhanced stability |
| 01/13/1993 | EP0522446A2 Method for controlling the direction of an earth drilling apparatus and device for making bore holes |
| 01/12/1993 | US5178223 Device for making a hole in the ground |
| 01/12/1993 | US5178222 Drill bit having enhanced stability |
| 01/07/1993 | EP0521542A1 Method and device for driving a pile or the like into and out of the ground |
| 01/05/1993 | US5176406 Coupling |
| 01/05/1993 | US5176211 Apparatus and method for recirculating mud when drilling under an obstacle |
| 12/30/1992 | EP0520596A1 Connection element pretreatment process for a gastight sleeve-pipe coupling |
| 12/30/1992 | CN2126308U Sucker rod rolling certralising and releasingproof device |
| 12/29/1992 | US5174765 Electrical connector having electrically conductive elastomer covered by insulating elastomer |
| 12/29/1992 | US5174679 Protector for bore rods and pump rods |
| 12/29/1992 | US5174395 In-the-hole drill inner tube rod |
| 12/29/1992 | US5174391 Tubular element for use in a rotary drilling assembly and method |
| 12/29/1992 | US5174375 For conducting a fluid and running a linear into an underground borehole |
| 12/29/1992 | US5174340 Apparatus for preventing casing damage due to formation compaction |
| 12/27/1992 | CA2072431A1 Procedure for pre-treating the connecting elements of a gas-tight coupler-type tube connection |
| 12/26/1992 | WO1993000500A2 Variable depth grooved drill string member |
| 12/23/1992 | WO1992022727A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 12/23/1992 | CN2125689U Fast dismounting protecting wire |
| 12/23/1992 | CA2111005A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 12/22/1992 | US5172765 Method using spoolable composite tubular member with energy conductors |
| 12/22/1992 | CA1311779C Joints for high-alloy oil-well tubing with resistance to crevice corrosion |
| 12/16/1992 | EP0518371A2 Fluid-actuated wellbore tool system |
| 12/16/1992 | EP0518114A1 Device for releasably connecting a drill pipe to a rotary drive |
| 12/16/1992 | EP0517968A1 Improvements in or relating to the formation of well bores |
| 12/15/1992 | US5171139 Moineau motor with conduits through the stator |
| 12/15/1992 | US5170847 Hydraulic release oil tool |
| 12/15/1992 | US5170815 Coiled tubing gas lift assembly |
| 12/12/1992 | WO1992022728A1 Method for continuing a measuring operation after recovering a measuring instrument stuck in a well |
| 12/12/1992 | CA2089144A1 Process for continuing a measuring operation after recovering a measuring instrument stuck in a well |
| 12/10/1992 | WO1992021850A1 Centraliser |
| 12/10/1992 | WO1992021849A1 Drilling apparatus |
| 12/10/1992 | DE4113847C1 Coupling releasably joining top end of string section with rotary drive pipe hole - uses coupling lever on axis at right angles to radial plane running through lever and rotation axis of drive pipe |
| 12/09/1992 | EP0516998A1 Ductile cast iron driving tube |
| 12/08/1992 | US5169265 Passive fire protection system for marine risers |
| 12/08/1992 | US5169264 Propulsion process of buried pipe |
| 12/08/1992 | US5169256 Hand connect-disconnect coupling for blast furnace tap hole drill rod assembly |
| 12/08/1992 | US5169183 Threaded joint for drill rod elements |
| 12/08/1992 | US5168944 Telescopically extensible drill |
| 12/08/1992 | US5168942 For measuring earth formation while drilling in an earth formation |
| 12/02/1992 | CN2123601U Adjoint heat device of a.c. electric heating sucker rod |
| 12/02/1992 | CN2123600U Complex layer casing pipe device |