| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/08/1977 | US4010642 Borehole pressure measurement |
| 03/01/1977 | US4009909 Upward tunneling |
| 03/01/1977 | US4009893 Tubing or casing joint |
| 03/01/1977 | US4009760 Apparatus for roof drilling |
| 02/22/1977 | US4008972 Tubing connector |
| 02/08/1977 | US4006787 Drilling tool with drill and receiving element |
| 02/08/1977 | US4006530 Apparatus for measuring the diameter of a well bore |
| 01/25/1977 | US4004832 Thread form for pipe joints |
| 01/25/1977 | US4004643 Mechanical drilling jar |
| 01/25/1977 | US4004531 Drilling system for deep water offshore locations |
| 01/25/1977 | US4004326 Cable protector |
| 01/18/1977 | US4003669 Anti-corrosive insert for sucker rod couplings |
| 01/18/1977 | US4003442 Detachable drill bit for impact drilling |
| 01/11/1977 | US4002359 Tool joint for drill pipes |
| 01/11/1977 | US4002214 Drilling tool, especially for hammer drills |
| 01/04/1977 | US4001774 Method of transmitting signals from a drill bit to the surface |
| 01/04/1977 | US4000549 Stabilizer |
| 12/28/1976 | US3999811 Drill pipe protector |
| 12/28/1976 | US3999618 Hammer stabilizer |
| 12/28/1976 | US3999617 Self-supported drilling riser |
| 12/21/1976 | US3998479 Dual conduit drill stem member and connection |
| 12/21/1976 | US3998443 Multidirectional shock absorbing device |
| 12/21/1976 | US3998280 Wave motion compensating and drill string drive apparatus |
| 12/14/1976 | US3997009 Well drilling apparatus |
| 12/14/1976 | US3996755 Tension leg structure with riser stabilization |
| 12/07/1976 | US3995479 Apparatus for protecting downhole instruments from torsional and lateral movements |
| 11/30/1976 | US3994552 Submersible pipe electrical cable assembly |
| 11/30/1976 | US3994516 Telescoping pipe coupling with improved pressure seal connection threads |
| 11/23/1976 | US3993368 Tool joint wear protectors |
| 11/23/1976 | US3993130 Method and apparatus for controlling the injection profile of a borehole |
| 11/23/1976 | US3992889 Flotation means for subsea well riser |
| 11/16/1976 | US3991850 Noise-attenuating positioners for acoustic well-logging tools |
| 11/02/1976 | US3989554 Composite hardfacing of air hardening steel and particles of tungsten carbide |
| 11/02/1976 | US3989330 Electrical kelly cock assembly |
| 11/02/1976 | US3989284 Tubular connection |
| 10/26/1976 | US3987856 Kelly crowd for vertical drill rig |
| 10/26/1976 | US3987639 Methods and apparatus for installing a drill conductor from an offshore tower |
| 10/19/1976 | US3986583 Force transmitting coupling |
| 10/19/1976 | US3986570 Rock bit with quick change connection |
| 10/12/1976 | US3984990 Support means for a well riser or the like |
| 09/28/1976 | US3982594 Eccentric stabilizer |
| 09/21/1976 | US3981368 Coupling means in a drilling machine |
| 09/21/1976 | US3981359 Centralizer element for well screen |
| 09/21/1976 | US3981357 Marine riser |
| 09/14/1976 | US3980369 Submersible pump interconnection assembly |
| 09/07/1976 | US3978933 Bit-adjacent stabilizer and steel |
| 09/07/1976 | US3978924 Hidden bow spring for calipers and centralizers |
| 09/07/1976 | US3978804 Riser spacers for vertically moored platforms |
| 08/31/1976 | US3977468 Well bore caliper and centralizer apparatus having articulated linkage |
| 08/24/1976 | US3976347 Electrical connector and method |
| 08/17/1976 | US3974876 Downhole fluid flow regulator |
| 08/17/1976 | US3974875 Underwater well completion method and apparatus |
| 08/10/1976 | US3973468 Multi-stage extendible and contractible shaft with shock absorption |
| 07/27/1976 | US3971450 Well drilling tool |
| 07/27/1976 | US3971447 Drill rod for percussion drilling |
| 07/27/1976 | US3971442 Method of cleaning tubular members on a rig floor |
| 07/06/1976 | US3968043 Method of preparation of material for lubrication of external surface of drilling pipe |
| 07/06/1976 | US3967909 Latching and latch releasing mechanism for auger string couplings |
| 06/29/1976 | US3966341 Drill steel |
| 06/29/1976 | US3966236 Releasable coupling |
| 06/15/1976 | US3963228 Drill string shock absorber |
| 06/15/1976 | US3963075 Centralizer for elastomer coated blast joint |
| 06/08/1976 | US3961815 Leak-tight ball-and-socket connecting device transmitting torques and stresses between two pipes |
| 06/08/1976 | US3961674 Directional drilling system |
| 05/25/1976 | US3958649 Methods and mechanisms for drilling transversely in a well |
| 05/25/1976 | US3958642 Quick latching drill pipe blowout preventer and method of use thereof |
| 05/18/1976 | US3958049 Method of inspecting and treating sucker rod |
| 05/18/1976 | US3957663 Gear box oil, petroleum paraffins, distillation residues |
| 05/18/1976 | US3957291 Ball joint assembly with internal passages |
| 05/18/1976 | US3957125 Multi-stage double-acting extendible and contractible shaft drive for drilling device |
| 05/18/1976 | US3957118 Cable system for use in a pipe string and method for installing and using the same |
| 05/18/1976 | US3957112 Offshore apparatus for carrying out operations in an offshore well |
| 05/11/1976 | US3955622 Dual drill string orienting apparatus and method |
| 05/11/1976 | US3955621 Riser assembly |
| 04/27/1976 | US3952526 Flexible supportive joint for sub-sea riser flotation means |
| 04/13/1976 | US3949818 Hydraulic drilling rig and power swivel |
| 04/06/1976 | US3949150 Drilling string shock-absorbing tool |
| 04/06/1976 | US3948575 Drill pipe and drill collar containing molded casing protector and method of protecting casing therewith |
| 04/06/1976 | US3948545 Mechanically operated breech block |
| 03/30/1976 | US3947009 Drill shock absorber |
| 03/30/1976 | US3947008 Drill string shock absorber |
| 03/30/1976 | US3946569 Method and means for installing a post |
| 03/23/1976 | US3945700 Connector with fluid-resistant sleeve assembly |
| 03/23/1976 | US3945446 Stabilizer for drill strings |
| 03/16/1976 | US3943618 Method of assembly of a dual-walled pipe |
| 03/09/1976 | US3942838 Bit coupling means |
| 03/09/1976 | US3942824 Well tool protector |
| 03/02/1976 | US3940832 Strapping for fastening production tubing to electrical cable |
| 02/24/1976 | US3939670 Rotatable drill string having a torsionally elastic shaft driving connection with rock bit |
| 02/17/1976 | US3938853 Shrink-fit sleeve apparatus for drill strings |
| 02/03/1976 | US3936733 Apparatus for supporting an inspection device for tubular members and accommodating lateral shifting of the tubular members as they are run into or pulled from a well bore |
| 02/03/1976 | US3935632 Method of preparing an insulated negative buoyancy flow line |
| 01/27/1976 | US3934945 Drill rod stabilization means |
| 01/27/1976 | US3934660 Flexpower deep well drill |
| 01/20/1976 | US3933395 Stabilizer |
| 01/20/1976 | US3933210 Drill head assembly |
| 01/20/1976 | US3933203 Centralizer for production string including support means for control lines |
| 01/20/1976 | US3933108 Buoyant riser system |
| 01/20/1976 | US3933012 Torque absorber for submergible pumps |
| 01/06/1976 | US3930754 Portable water sampling apparatus |