| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 09/21/1976 | US3981485 Helicopter transportable drilling rig |
| 09/21/1976 | US3981368 Coupling means in a drilling machine |
| 09/21/1976 | US3981357 Marine riser |
| 09/14/1976 | US3980145 Method and apparatus for inserting tubular structural members in a soil formation |
| 09/14/1976 | US3980144 Rock drill feed mechanism |
| 09/14/1976 | US3980142 Drilling boom |
| 09/07/1976 | US3978932 Apparatus and method for obtaining undisturbed soil core samples |
| 08/31/1976 | US3977636 Turntable |
| 08/31/1976 | US3977478 Method for laser drilling subterranean earth formations |
| 08/24/1976 | US3976148 Method and apparatus for determining onboard a heaving vessel the flow rate of drilling fluid flowing out of a wellhole and into a telescoping marine riser connecting between the wellhouse and the vessel |
| 08/24/1976 | US3975831 Directing instrument |
| 08/17/1976 | US3974886 Directional drilling tool |
| 08/10/1976 | US3973747 Method of and arrangement for controlling the speed of the movements of hydraulic booms |
| 08/10/1976 | US3973635 Method and apparatus for offshore drilling operations |
| 08/03/1976 | US3972375 Auger drive with auxiliary powertrain boxes |
| 07/27/1976 | US3971449 Procedure for controlling a rock drill and rock drill for carrying out the procedure |
| 07/27/1976 | US3971217 Reciprocatable devices |
| 07/20/1976 | US3970157 Ram-borer apparatus |
| 07/13/1976 | US3968847 Wellpoint jetting head |
| 07/13/1976 | US3968813 Flow shut off valve |
| 07/06/1976 | US3967689 Reaming apparatus |
| 07/06/1976 | US3967686 Device for guiding a drill tool |
| 06/29/1976 | US3966169 Rod and pipe pusher, puller device |
| 06/29/1976 | US3965996 Means and method of drilling wells |
| 06/29/1976 | US3965995 Machine for boring a large diameter blind hole |
| 06/29/1976 | US3965981 Pre-packed well points |
| 06/22/1976 | US3964265 Method and apparatus for mining and supporting the mine roof |
| 06/15/1976 | USRE28860 Curved offshore well conductors |
| 06/08/1976 | US3961674 Directional drilling system |
| 06/08/1976 | US3961673 Drilling apparatus |
| 05/25/1976 | US3958649 Methods and mechanisms for drilling transversely in a well |
| 05/25/1976 | US3958648 Drilling equipment |
| 05/25/1976 | US3958641 Self-decentralized hydra-jet tool |
| 05/25/1976 | US3958640 Method of drilling an oil well to recover casings |
| 05/25/1976 | US3958639 Method of drilling an oil well to recover casings |
| 05/11/1976 | US3955632 Pipe laying apparatus |
| 05/11/1976 | US3955631 Soil sampler |
| 05/11/1976 | US3955621 Riser assembly |
| 04/27/1976 | US3952858 Collector and loading apparatus for auger spoil |
| 04/27/1976 | US3952832 Pulsed high pressure liquid propellant combustion powered seismic sources |
| 04/27/1976 | US3952818 Grooving bucket |
| 04/27/1976 | US3952816 Drilling system and method of pulling it up |
| 04/27/1976 | US3952813 Percussive device for driving holes in soil |
| 04/06/1976 | US3948329 Apparatus for effecting ground penetration of a ground engaging member |
| 04/06/1976 | US3948058 Device for soil sampling under water |
| 03/23/1976 | US3945608 Anchoring means for earth tunneling devices |
| 03/23/1976 | US3945444 Split bit casing drill |
| 03/23/1976 | US3945443 Steerable rock boring head for earth boring machines |
| 03/09/1976 | US3942593 Drill rig apparatus |
| 02/24/1976 | US3939926 Portable earth boring machine |
| 02/17/1976 | US3938600 Hydraulic mining nozzle-air lift device |
| 02/17/1976 | US3938598 Belling apparatus |
| 02/17/1976 | US3938597 Portable earth boring machine |
| 02/17/1976 | US3938344 Earth auger and method for driving piles and the like by means of said earth auger |
| 02/03/1976 | US3935910 Method and apparatus for moulding protective tubing simultaneously with bore hole drilling |
| 02/03/1976 | US3935642 Directional drilling of bore holes |
| 01/27/1976 | US3934945 Drill rod stabilization means |
| 01/27/1976 | US3934660 Flexpower deep well drill |
| 01/27/1976 | US3934659 Apparatus for drilling holes in earth surface |
| 01/27/1976 | US3934658 Modular underwater well platform system |
| 01/27/1976 | US3934528 Means and methods for anchoring an offshore tension leg platform |
| 01/20/1976 | US3933059 Deep drilling machine demountable for helicopter transport |
| 01/06/1976 | US3930545 Tiltable coupling |
| 01/06/1976 | US3930538 Wellpoint with adjustable valve |