| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 12/04/1979 | US4176986 Subsea riser and flotation means therefor |
| 12/04/1979 | US4176894 Internal electrical interconnect coupler |
| 12/04/1979 | US4176714 Shock absorber for oil well pumping unit |
| 12/04/1979 | CA1067397A1 Method and means for lining deep shafts |
| 11/27/1979 | US4175757 Sealant system for roof drilling apparatus |
| 11/27/1979 | US4175619 Well collar or shoe and cementing/drilling process |
| 11/27/1979 | CA1067065A1 Soft formation drill bit |
| 11/14/1979 | EP0005384A1 Down-hole air hammer comprising a drill bit |
| 11/13/1979 | US4173988 Pneumatically actuated thread protector for pipes |
| 11/13/1979 | US4173804 Floating installation connected to a stationary underwater installation through at least one flexible pipe |
| 11/06/1979 | US4173360 Flexible sealing joint |
| 11/06/1979 | US4173130 Drilling shock sub |
| 10/30/1979 | CA1065300A1 Drill string shock absorber |
| 10/23/1979 | US4171674 Fairing for pipes |
| 10/23/1979 | US4171560 Method of assembling a wear sleeve on a drill pipe assembly |
| 10/23/1979 | CA1065030A1 Cable protector |
| 10/16/1979 | US4171187 Air injection sub |
| 10/16/1979 | US4171031 Well logging instrument guide apparatus |
| 10/16/1979 | US4171025 Hydraulic shock absorbing method |
| 10/16/1979 | CA1064471A1 Underreaming tool with overriding extended arm retainer |
| 10/16/1979 | CA1064469A1 Bit packer for dual tube drilling |
| 10/02/1979 | US4169505 Kick-over apparatus |
| 10/02/1979 | US4169503 Apparatus for generating a shock wave in a well hole |
| 09/25/1979 | US4168752 Flexible conduit for effecting lateral channelling in coal or oil shale beds |
| 09/25/1979 | CA1063094A1 Extension rods used in percussive drilling |
| 09/25/1979 | CA1063093A1 Drill crown coupling |
| 09/25/1979 | CA1063017A1 Riser set-aside system |
| 09/11/1979 | CA1062240A1 Spring adjustment system for drill string tool |
| 09/11/1979 | CA1062154A1 Centering devices for cleaning tools and the like |
| 09/11/1979 | CA1062147A1 Wireline latching apparatus and method of use |
| 09/04/1979 | CA1061772A1 Method and means for effecting lateral channelling in coal or oil shale beds |
| 08/28/1979 | US4165891 Breech block connector |
| 08/28/1979 | US4165626 Wash water supplying drive head and scraper and cutter assembly |
| 08/28/1979 | CA1061323A1 Rock-drilling bit for percussion hammers |
| 08/21/1979 | US4164978 Oil extraction method |
| 08/21/1979 | CA1060880A1 Shock absorbing rotary drive coupling |
| 08/21/1979 | CA1060782A1 Well centralizer and method of making |
| 08/14/1979 | US4164257 Internal protection of well casing |
| 08/07/1979 | US4163478 Self aligning impact rock drilling tool |
| 08/07/1979 | CA1059841A1 Fairing for pipes |
| 07/31/1979 | US4162705 Center section for oil well perforation testing device |
| 07/31/1979 | US4162619 Drill string shock sub |
| 07/31/1979 | CA1059614A1 Ultrasonic inspection apparatus for well operations |
| 07/31/1979 | CA1059613A1 Ultrasonic inspection apparatus for vertical members |
| 07/31/1979 | CA1059551A1 Dovetail connection for pin and box joints |
| 07/24/1979 | CA1058833A1 Well line strap connection |
| 07/17/1979 | US4161332 Dovetail connection for pin and box joints |
| 07/17/1979 | CA1058607A1 Detachable drill bit for impact drilling |
| 07/10/1979 | US4160622 Portable water sampling apparatus |
| 07/03/1979 | US4160063 Method for preventing the adherence of oil to surfaces |
| 06/26/1979 | CA1057277A2 Replaceable drive stem for a raise drill |
| 06/19/1979 | CA1056807A1 Wellbore telemetry system |
| 06/19/1979 | CA1056722A1 Marine riser system and method for installing the same |
| 06/12/1979 | CA1056364A1 Hydraulic shock absorber |
| 06/12/1979 | CA1056225A1 Drilling system for deep water offshore locations |
| 05/29/1979 | US4156374 Pre-formed wear pads for drill stabilizers |
| 05/29/1979 | CA1055476A1 Drill pipe protector |
| 05/22/1979 | US4155673 Floating structure |
| 05/15/1979 | US4154466 Pipe section and coupling |
| 05/15/1979 | US4154310 Method and equipment for drilling wells |
| 05/15/1979 | US4154302 Cable feed-through method and apparatus for well head constructions |
| 05/08/1979 | US4153283 Casing joint |
| 05/08/1979 | US4153120 Change in length of drill string while instrument remains therein |
| 05/08/1979 | US4153119 Directional drilling apparatus |
| 05/08/1979 | US4153112 Flex joint |
| 05/08/1979 | CA1054139A1 Electrical kelly cock assembly |
| 05/01/1979 | US4151889 Rock-drilling bit for percussion hammers |
| 05/01/1979 | US4151865 Flexible tube particularly for drillings, and a process for manufacturing said tube |
| 05/01/1979 | CA1053577A1 Knockdown centralizer |
| 04/24/1979 | CA1053220A1 Composite extender rod for out-of-the-hole hammer drilling |
| 04/17/1979 | US4149391 Flexible drill pipe |
| 04/03/1979 | US4147454 Method of and apparatus for construction of pipes for marine use, as for ocean mining and the like |
| 04/03/1979 | CA1051863A1 Drill string shock absorbing apparatus |
| 03/27/1979 | US4146060 Drill pipe wear belt assembly |
| 03/20/1979 | US4145034 Heat shield for a drill string shock absorbing apparatus |
| 03/13/1979 | US4143722 Downhole flexible drive system |
| 03/13/1979 | US4143713 Self-centering basket |
| 03/13/1979 | CA1050418A1 Oil well tool with packing means |
| 03/06/1979 | US4142820 Pivotal connecting device for pivotally connecting an off-shore articulated column structure to a sea bottom |
| 03/06/1979 | US4142596 Drive link permitting feed and rotation of drills of various sizes |
| 03/06/1979 | US4142593 Raise drill inner yoke bridge |
| 03/06/1979 | US4142584 Termination means for a plurality of riser pipes at a floating platform |
| 02/27/1979 | US4141386 Blast joint |
| 02/27/1979 | US4141225 Articulated, flexible shaft assembly with axially lockable universal joint |
| 02/20/1979 | US4139994 Vibration isolator |
| 02/20/1979 | CA1048996A1 Raise drilling bit with detachable stem |
| 02/13/1979 | US4139334 Cable string for downhole pumps |
| 02/13/1979 | US4139024 Thermal insulation structure |
| 02/06/1979 | US4138148 Split-ring riser latch |
| 02/06/1979 | US4137762 Wireline apparatus for use in earth boreholes |
| 01/30/1979 | US4136996 Directional drilling marine structure |
| 01/23/1979 | US4135577 Tool centralizer guide having a J-groove release |
| 01/09/1979 | US4133516 Shock absorber for well drilling pipe |
| 01/09/1979 | US4133397 Drilling with multiple in-hole motors |
| 01/09/1979 | US4133395 Earth boring assembly with drag pipe |
| 01/09/1979 | US4133095 Treating, including induction heating of well pipe connections |
| 12/26/1978 | US4131167 Releasable drill string stabilizer |
| 12/26/1978 | US4131165 Hammer drill |
| 12/26/1978 | US4131005 Tubular member straightening, descaling and hydraulic testing apparatus |
| 12/26/1978 | US4130995 VMP riser horizontal bearing |