| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 10/11/1977 | US4053022 Device for guiding a drilling string during underwater drilling |
| 10/04/1977 | US4051911 Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner |
| 10/04/1977 | US4051908 Downhole drilling system |
| 09/27/1977 | US4050680 Cutting torch arrangement |
| 09/27/1977 | US4050526 Post driving machine |
| 09/27/1977 | US4050259 Safety shield and temporary roof support |
| 09/20/1977 | US4049067 Cutter mounting extension apparatus |
| 09/20/1977 | US4049065 Drilling apparatus |
| 09/20/1977 | US4049064 Multi function drill drive system |
| 09/13/1977 | US4047582 Portable earth boring machine |
| 09/13/1977 | US4047580 High-velocity jet digging method |
| 09/13/1977 | US4047579 Sea drilling jig |
| 09/13/1977 | US4047578 Portable earth boring machine |
| 09/06/1977 | US4046206 Locking apparatus for earth boring cutter or stabilizer |
| 09/06/1977 | US4046205 Earth auger and method for driving piles and the like by means of said earth auger |
| 09/06/1977 | US4046204 Controlled directional drilling tool |
| 08/30/1977 | US4044473 Tilt detector and system |
| 08/23/1977 | US4043136 System and method for installing production casings |
| 08/16/1977 | US4042048 Drilling technique |
| 08/16/1977 | US4042047 Raise boring head having fluid traversing means |
| 08/16/1977 | US4042046 Directional control mechanism for underground driven pipes and conduits |
| 08/16/1977 | US4042043 Portable earth boring machine |
| 08/09/1977 | US4040495 Drilling apparatus |
| 08/09/1977 | US4040494 Drill director |
| 08/02/1977 | US4039208 Device for locking and unlocking two concentric pipes |
| 08/02/1977 | US4039176 Marine riser spider shock absorber apparatus |
| 08/02/1977 | US4039032 Hose training means |
| 08/02/1977 | US4039025 Apparatus for anchoring an offshore structure |
| 07/26/1977 | US4037671 Drill boom with hydraulic parallel motion means |
| 07/26/1977 | US4037424 Offshore drilling structure |
| 07/19/1977 | US4036508 Self-propelled drilling and workover rig |
| 07/19/1977 | US4036313 Mounting for inboard cutters on a raise drill |
| 07/19/1977 | US4035969 Telescopic columns of machines for making foundations, and the telescopic columns thereby derived |
| 06/28/1977 | US4031971 Jet nozzle drilling assembly |
| 06/28/1977 | US4031969 Method and apparatus for earth boring |
| 06/21/1977 | US4030557 Well drilling apparatus and method |
| 06/21/1977 | US4030310 Monopod drilling platform with directional drilling |
| 06/07/1977 | US4027734 Deviated conductor driving system |
| 06/07/1977 | US4027407 Jet flow alternator |
| 06/07/1977 | US4027399 Positional sensing |
| 05/31/1977 | US4027210 Method and control system to limit shifting movement of a winning tool for a tunneling machine |
| 05/31/1977 | US4026371 Pilot head for laying pipes in the ground |
| 05/31/1977 | US4026356 Method for in situ gasification of a subterranean coal bed |
| 05/31/1977 | US4026116 Mine roof supporting |
| 05/24/1977 | US4025119 Method and apparatus for strip mining |
| 05/24/1977 | US4024721 Method and apparatus for laying pipes in the ground |
| 05/24/1977 | US4024718 Subsea cable apparatus and method of handling same |
| 05/17/1977 | US4023628 Drilling device utilizing sonic resonant torsional rectifier |
| 05/10/1977 | US4022410 Universal coupling |
| 05/10/1977 | US4022284 Automatic alignment system for earth boring rig |
| 05/10/1977 | US4022279 Formation conditioning process and system |
| 05/10/1977 | US4021978 Mast assembly |
| 05/03/1977 | US4020909 Portable earth drilling apparatus |
| 05/03/1977 | US4020641 Method of laying pipes in the ground |
| 04/26/1977 | US4019590 Method of roof drilling |
| 04/12/1977 | US4016944 Pneumatic hammer-auger earth boring apparatus |
| 04/12/1977 | US4016942 Method and apparatus for indicating the position of one well bore with respect to a second well bore |
| 04/12/1977 | US4016687 Angular adjustment for drill rig mast |
| 04/05/1977 | US4015674 Apparatus for unitizing a pair of augers |
| 04/05/1977 | US4015673 Directional drilling system |
| 03/22/1977 | US4013134 Portable earth boring machine with steering head |
| 03/08/1977 | US4011019 Adjustable and disengagable earth raise borer stem |
| 03/01/1977 | US4009909 Upward tunneling |
| 02/22/1977 | US4008922 Method and a machine for advancing an underground face of a geological formation |
| 02/15/1977 | US4007799 Raise drill with replaceable stem |
| 02/15/1977 | US4007797 Device for drilling a hole in the side wall of a bore hole |
| 02/01/1977 | US4005851 Hydraulically operated drilling apparatus |
| 01/25/1977 | US4004737 Continuous high velocity fluid jet system |
| 01/25/1977 | US4004644 Roller cutter |
| 01/25/1977 | US4004642 Tround terra-drill processes and apparatus |
| 01/25/1977 | US4004470 Drilling apparatus for drilling small diameter bore holes deep into the earth |
| 01/18/1977 | US4003602 Method and apparatus for in-cutting and out-cutting during coal mining |
| 01/18/1977 | US4003440 Apparatus and process for drilling underground arcuate paths utilizing directional drill and following liner |
| 01/11/1977 | US4002119 Method for in situ assembly of charge for controlled shooting of wells |
| 01/04/1977 | US4000879 Pushing or pulling apparatus for pipe, rod or the like |
| 01/04/1977 | US4000873 Mounting for rock drills |
| 12/28/1976 | US3999617 Self-supported drilling riser |
| 12/28/1976 | US3999616 Method and apparatus for establishing the drilling line of an overhead boring machine |
| 12/21/1976 | US3998281 Earth boring method employing high powered laser and alternate fluid pulses |
| 12/14/1976 | US3997010 Downhole forward and back scuttling tool |
| 12/14/1976 | US3997008 Drill director |
| 12/14/1976 | US3996758 Method for placement of production casing under obstacle |
| 12/14/1976 | US3996755 Tension leg structure with riser stabilization |
| 12/07/1976 | US3995701 Derrick tilting system |
| 11/23/1976 | US3993271 Drill boom arrangement |
| 11/23/1976 | US3993147 Taper lock removable stem for raise bit |
| 11/23/1976 | US3993127 Apparatus for positioning a working implement in a borehole |
| 11/16/1976 | US3991824 Offshore well drilling, completion and production |
| 11/16/1976 | US3991817 Geothermal energy recovery |
| 11/02/1976 | USRE29021 Underground mining system |
| 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 | US3987857 Side cutting device for earth boring procedures |
| 10/26/1976 | US3987639 Methods and apparatus for installing a drill conductor from an offshore tower |
| 10/26/1976 | US3987638 Subsea structure and method for installing the structure and recovering the structure from the sea floor |
| 10/19/1976 | US3986568 Apparatus for making underground passages |
| 10/12/1976 | US3984991 Anchor and method of setting anchor |
| 10/05/1976 | US3983946 Automatically repositionable rotary platform, and method |
| 10/05/1976 | US3983828 Vertically moored platform installation |
| 09/28/1976 | US3982715 Adjustable tool positioning structure |