| Patents for E21B 19 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (17,198) |
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| 12/28/1976 | US3999610 Pipe snubbing method and apparatus |
| 12/28/1976 | US3999260 Rotary power slip assembly |
| 12/21/1976 | US3998428 Well pipe extractor and installer |
| 12/21/1976 | US3998280 Wave motion compensating and drill string drive apparatus |
| 12/14/1976 | US3996737 Method of manufacturing elevator links and a cast elevator link blank for use in the method |
| 12/07/1976 | US3995829 Tube driving apparatus |
| 12/07/1976 | US3995355 Laying of flexible pipe |
| 11/30/1976 | US3994350 Rotary drilling rig |
| 11/16/1976 | US3991978 Submersible pump boom |
| 11/16/1976 | US3991887 Method and apparatus for moving drill pipe and casing |
| 11/16/1976 | US3991837 Buoyant counterbalancing for drill string |
| 11/09/1976 | US3990522 Rotary percussion drill |
| 11/02/1976 | USRE29020 Drilling apparatus |
| 10/26/1976 | US3988004 Drive jaws for a pipe and rod pusher device |
| 10/26/1976 | US3988003 Pipe guide means for a rod and pipe pusher |
| 10/26/1976 | US3987910 Apparatus for racking drill pipes on floater type platforms |
| 10/26/1976 | US3987856 Kelly crowd for vertical drill rig |
| 10/19/1976 | US3986619 Pipe handling apparatus for oil well drilling derrick |
| 10/19/1976 | US3986618 Pipe rack with pivoted fingers and screw conveyors |
| 10/19/1976 | US3986583 Force transmitting coupling |
| 10/19/1976 | US3986569 Drill string element handling apparatus |
| 10/19/1976 | US3986564 Well rig |
| 10/12/1976 | US3985189 Drill rod handling device |
| 10/12/1976 | US3984990 Support means for a well riser or the like |
| 10/05/1976 | US3984007 Pipe handling apparatus for pipe laying barges |
| 10/05/1976 | US3983949 Auger section positioning means |
| 09/21/1976 | US3981369 Riser pipe stacking system |
| 09/14/1976 | US3980144 Rock drill feed mechanism |
| 09/14/1976 | US3980143 Holding wrench for drill strings |
| 09/14/1976 | US3979944 Hydraulic drill, in particular a rock drill |
| 09/07/1976 | US3978994 Pipe rack with pivoted fingers |
| 09/07/1976 | US3978993 Vertically adjustable pipe racking apparatus |
| 09/07/1976 | US3978768 Transfer feed system |
| 08/31/1976 | US3977480 Arrangement for exchanging drill bits |
| 08/24/1976 | US3976207 Casing stabbing apparatus |
| 08/24/1976 | US3976149 Rock drill equipment having a mechanized drill bit exchange |
| 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 | US3976147 Auger |
| 08/24/1976 | US3976134 Mandrel locking sleeve |
| 08/24/1976 | US3976132 Tubing spreader mechanism |
| 08/24/1976 | US3975831 Directing instrument |
| 08/10/1976 | US3973634 Device for feeding a reel along a track |
| 08/03/1976 | US3972375 Auger drive with auxiliary powertrain boxes |
| 07/27/1976 | US3971442 Method of cleaning tubular members on a rig floor |
| 07/13/1976 | US3968813 Flow shut off valve |
| 07/06/1976 | US3967909 Latching and latch releasing mechanism for auger string couplings |
| 07/06/1976 | US3967686 Device for guiding a drill tool |
| 06/29/1976 | US3966169 Rod and pipe pusher, puller device |
| 06/29/1976 | US3966054 Shock absorber for tubular storage or drill stands on a drilling ship |
| 06/29/1976 | US3966053 Drilling apparatus |
| 06/29/1976 | US3966019 Lubricating system of pressure fluid operated rock drill machines |
| 06/29/1976 | US3965997 Method and apparatus for guiding and sealing a drill string |
| 06/29/1976 | US3965994 Magazine for storing drill string elements |
| 06/29/1976 | US3965981 Pre-packed well points |
| 06/29/1976 | US3965685 Method for lowering ground water |
| 06/29/1976 | US3965628 Drill mast support assembly |
| 06/22/1976 | US3964552 Drive connector with load compensator |
| 06/15/1976 | US3962943 Safety apparatus for a cable feed system |
| 06/08/1976 | US3961673 Drilling apparatus |
| 06/08/1976 | US3961399 Power slip unit |
| 06/01/1976 | US3960360 Internally pressurized load supporting mast |
| 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 | US3957113 Pipe disconnecting apparatus |
| 05/11/1976 | US3955798 Guiding and positioning device for the block and hook of a derrick on a ship |
| 05/11/1976 | US3955632 Pipe laying apparatus |
| 05/04/1976 | US3953982 Method and apparatus for laying and connecting flow lines to submerged structures |
| 04/20/1976 | US3951470 Drill steel idler guide |
| 04/20/1976 | US3951216 Diamond drill supporting apparatus |
| 04/13/1976 | US3949883 Hydraulically operated heavy lift system for vertically moving a string of pipe |
| 04/13/1976 | US3949818 Hydraulic drilling rig and power swivel |
| 04/06/1976 | US3948486 New device for applying a determined force to an element connected to an installation subjected to alternating movements |
| 04/06/1976 | US3948145 Fluid control mechanism |
| 03/30/1976 | US3946819 Well tool and method of use therefor |
| 03/30/1976 | US3946559 Heave compensating devices for marine use |
| 03/23/1976 | US3945608 Anchoring means for earth tunneling devices |
| 03/23/1976 | US3945446 Stabilizer for drill strings |
| 03/23/1976 | US3945442 Hydraulic rock drill with stroke responsive advance |
| 03/16/1976 | US3944300 Resilient guide bushing mounting for blast hole drills or the like |
| 03/16/1976 | US3943868 Heave compensation apparatus for a marine mining vessel |
| 03/09/1976 | US3942742 Cable guide means for a cable drum |
| 03/09/1976 | US3942592 Drill stem make-up and break-out system for earth drilling machines |
| 03/02/1976 | US3941146 Apparatus for storing a flexible elongated member, such as a flexible drill column |
| 02/24/1976 | US3940112 Crown block |
| 02/24/1976 | US3940111 Apparatus for applying a determined force to an element connected to an installation subjected to alternating movements |
| 02/24/1976 | US3939991 Parking brake for subsea mining lift system |
| 02/24/1976 | US3939990 Automatic roughneck |
| 02/17/1976 | US3938853 Shrink-fit sleeve apparatus for drill strings |
| 02/17/1976 | US3938427 Percussion hammer |
| 02/17/1976 | US3938381 Sensitive deep-well-drilling hook load measuring system |
| 02/10/1976 | US3937515 Head for pipe rackers |
| 02/10/1976 | US3937514 Guide head for pipe rackers |
| 02/10/1976 | US3937334 Pipe handling device |
| 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 | US3936034 Balanced hoist apparatus |
| 01/27/1976 | US3934660 Flexpower deep well drill |
| 01/20/1976 | US3933208 Centralizer control |
| 01/13/1976 | US3931735 Methods and apparatus for measuring the rate of penetration in well drilling from floating platforms |