| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/21/1993 | CN2138692Y Block type fixed locking device on rod pump |
| 07/21/1993 | CN2138691Y Invertable ball hinged anti-slip device for oil sucker rod |
| 07/21/1993 | CN2138690Y Multifunction complete well tube |
| 07/20/1993 | US5228518 Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 07/20/1993 | US5228517 Method and apparatus for collecting percolating fluids and apparatus for the installation thereof |
| 07/20/1993 | CA1320455C Composite material tubing with little sensitivity to elongation variation under the effect of internal pressure |
| 07/14/1993 | CN2138186Y Sucker rod protector |
| 07/14/1993 | CN1074267A Rock drill bit and method of making same |
| 07/13/1993 | US5226491 Solenoid operated blanking block valve |
| 07/06/1993 | US5224898 Cushion connector |
| 07/06/1993 | US5224559 Hardfaced drilling tool joints |
| 07/06/1993 | US5224558 Down hole drilling tool control mechanism |
| 07/06/1993 | US5224556 Downhole activated process and apparatus for deep perforation of the formation in a wellbore |
| 06/30/1993 | CN2137287Y T-joint-type sealing unit for smooth rod |
| 06/30/1993 | CN2137286Y Rolling-pin-type clamping unit for oil pumping plunger |
| 06/30/1993 | CN1021468C Flexible hydraulic drilling tool |
| 06/29/1993 | US5222565 Drill section of a drilling tool |
| 06/23/1993 | EP0548008A1 Tool for impact drilling and chiseling and tool chuck therefor |
| 06/23/1993 | CN2136873Y Sucker rod joint |
| 06/22/1993 | US5221214 Electrical connector for submersible pump tandem motors |
| 06/22/1993 | US5220961 Assembly comprising an extension tube and a sleeving conduit inside this tube |
| 06/22/1993 | CA1319361C Drill pipes and casings utilizing multi-conduit tubulars |
| 06/16/1993 | EP0546892A1 Method and device for electrically interconnecting apparatuses such as wellbore probes |
| 06/16/1993 | EP0546805A1 Apparatus for communicating electrical signals in a well |
| 06/16/1993 | EP0546050A1 Pipe system with electrical conductors |
| 06/15/1993 | US5219298 Assembly for forming an electric connection through a pipe formed of several elements |
| 06/15/1993 | US5219247 Method of forming consolidating earth columns by injection, the relevant plant with double chamber pneumatic hammer boring drill and the resulting column |
| 06/15/1993 | US5219027 For use in a well bore |
| 06/11/1993 | CA2085028A1 Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein |
| 06/10/1993 | WO1993011335A1 Downhole adjustable stabilizer and method |
| 06/10/1993 | WO1993011334A1 Downhole stabiliser |
| 06/10/1993 | CA2124442A1 Downhole adjustable stabilizer and method |
| 06/10/1993 | CA2123700A1 Downhole stabiliser |
| 06/09/1993 | EP0545838A1 Composite tube for the oil industry and method for producing such a tube |
| 06/09/1993 | EP0544835A1 Variable depth grooved drill string member. |
| 06/09/1993 | CN2135642Y Changeable rod sealing device |
| 06/08/1993 | US5217077 Resettable packer |
| 06/08/1993 | US5217071 Production tube with integrated hydraulic line |
| 06/08/1993 | CA1318910C Rotary drill bit |
| 06/06/1993 | CA2057113A1 Adjustable down hole tool activating mechanism |
| 06/01/1993 | USH1192 Low-torque centralizer |
| 05/27/1993 | WO1993010326A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 05/27/1993 | CA2123889A1 A steerable drilling assembly for mounting on the end of a drill string to drill a borehole in an underground formation |
| 05/27/1993 | CA2081707A1 Triazine reinforcement and curing of hydrogenated acrylonitrile butadiene rubber |
| 05/26/1993 | CN2134481Y Anti-bend device for rod-line of oil well |
| 05/26/1993 | CN1072472A Oil extration machine |
| 05/25/1993 | US5213379 Fiber reinforcement of pipes |
| 05/25/1993 | US5213170 Footing auger |
| 05/25/1993 | US5213169 Exploration-sampling drilling system |
| 05/25/1993 | US5212885 High gas sealibility makeup for API buttress connections |
| 05/19/1993 | EP0542727A1 Swivel tool for well head |
| 05/19/1993 | EP0542584A1 Flexible tubing containing a centred line for transfer of energy or information and method of manufacturing such tubing |
| 05/19/1993 | EP0541942A1 Drill tube |
| 05/19/1993 | CN2133664Y Whole cable type heating sucker rod |
| 05/19/1993 | CN2133663Y Frequency-changer device for heating sucker rod |
| 05/19/1993 | CA2083184A1 Well tubing and tubing collar thereof |
| 05/18/1993 | US5211714 Wireline supported perforating gun enabling oriented perforations |
| 05/18/1993 | US5211229 Washpipe support clamp |
| 05/18/1993 | US5211226 Metal-to-metal seal for oil well tubing string |
| 05/18/1993 | US5211225 Submersible pump adapter |
| 05/18/1993 | CA1317930C Heavy wall drill pipe and method of manufacture of heavy wall drill pipe |
| 05/13/1993 | WO1993009375A1 High torque tool joint |
| 05/11/1993 | US5209311 Drill string component |
| 05/11/1993 | US5209136 For use in a borehole |
| 05/11/1993 | CA1317604C Device for evacuating excavated material for making deep tranches |
| 05/10/1993 | CA2081681A1 Boring tube |
| 05/05/1993 | CN2131972Y Bearing-type correcting unit for oil pipeline |
| 05/05/1993 | CN2131971Y Steel plastic protective ring |
| 05/05/1993 | CN2131970Y Integrated casinghead and tubinghead |
| 05/05/1993 | CN2131969Y Floating ball self-loading liquid floating hoop |
| 05/04/1993 | US5207283 Reversible bit bearing |
| 05/04/1993 | US5207274 Apparatus and method of anchoring and releasing from a packer |
| 05/04/1993 | US5207273 Method and apparatus for pumping wells |
| 05/04/1993 | US5207272 Electrically actuated well packer |
| 05/04/1993 | CA1317281C Thread coupling |
| 04/28/1993 | CN2130914Y Energy releasing joint with lizard tail shape |
| 04/27/1993 | US5205789 Flexible drilling motor coupling |
| 04/27/1993 | US5205365 Pressure assisted running of tubulars |
| 04/27/1993 | US5205364 Process and drilling equipment for sinking a well in underground rock formations |
| 04/27/1993 | CA1316964C Tubular coupling with improved metal to metal seal |
| 04/21/1993 | CN1071223A Disc drill bit |
| 04/20/1993 | CA1316301C Elliptical thread design |
| 04/15/1993 | WO1993007358A1 Circulation equipment |
| 04/15/1993 | DE4136059C1 Retrievable jacking tube with variable dia. - has profiled stiffening rings for elastically deformable tube jacket |
| 04/13/1993 | US5202680 System for drill string tallying, tracking and service factor measurement |
| 04/13/1993 | US5201814 Breakaway coupling device |
| 04/13/1993 | US5201375 Downhole drilling tool system |
| 04/13/1993 | CA1316168C Drill string element |
| 04/07/1993 | CN2129333Y Joint for combining bottom drilling |
| 04/06/1993 | US5199515 Dry pneumatic system for hard rock shaft drilling |
| 04/06/1993 | US5199510 Raise boring head and stem assembly method |
| 04/06/1993 | US5199495 Split wear bushing for a drilling rig |
| 04/01/1993 | WO1993006404A1 Optimized tubular connection |
| 04/01/1993 | WO1993006336A1 Downhole activated system for perforating a wellbore |
| 04/01/1993 | WO1993006333A1 Downhole activated process and apparatus for centralizing pipe in a wellbore |
| 04/01/1993 | WO1993006332A1 Rock-drilling bit |
| 04/01/1993 | WO1993004257A3 Drilling pipe |
| 03/31/1993 | EP0534919A1 Rock drilling device |
| 03/31/1993 | EP0534037A1 Disc drill bit |
| 03/31/1993 | EP0533758A1 Drill steering apparatus |