| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 12/24/1985 | US4560014 Thrust bearing assembly for a downhole drill motor |
| 12/17/1985 | US4558751 Apparatus for transporting equipment through a conduit |
| 12/17/1985 | US4558750 Method and apparatus for forming boreholes |
| 12/17/1985 | US4558749 Anti-jamming core barrels |
| 12/10/1985 | US4557338 Tool, particularly a boring tool |
| 12/10/1985 | CA1197835A1 Down-hole drilling apparatus |
| 12/04/1985 | EP0162878A1 Improvements in pipe laying and replacement. |
| 12/03/1985 | US4556398 Hinge joint for a screw planetary hydraulic drill |
| 11/27/1985 | EP0162190A1 Device for optionally drilling under-ground formations, straight or directionally |
| 11/26/1985 | US4554983 Oscillating friction ring assembly for applying axial thrust to a shaft |
| 11/26/1985 | US4554982 In an earth formation |
| 11/21/1985 | WO1985005145A1 Improvement to hole bottom hammers for ground drilling |
| 11/19/1985 | US4553611 Pressure drop regulator for downhole turbine |
| 11/12/1985 | CA1196626A1 Direct drive for deep-well drilling |
| 11/05/1985 | US4550788 Roof bolt hole groover |
| 11/05/1985 | CA1196267A1 Method and means for controlling the course of a bore hole |
| 10/22/1985 | US4548283 Rotating shaft seal and bearing lubricating apparatus |
| 10/22/1985 | CA1195516A1 Cable gripping apparatus having forward and rearward movement capabilities |
| 10/15/1985 | US4546836 Downhole motor fluid flow restrictor |
| 10/08/1985 | US4545241 For use with fluid-driven in-hole turbines |
| 10/02/1985 | EP0156609A1 Hammer for use in a bore hole and apparatus for use therewith |
| 10/02/1985 | EP0155990A2 Pipe laying apparatus |
| 10/01/1985 | US4544041 Well casing inserting and well bore drilling method and means |
| 09/26/1985 | WO1985004212A1 Hammer for use in a bore hole and apparatus for use therewith |
| 09/25/1985 | EP0155540A1 Apparatus working like an excavator for pushing pipes under the soil |
| 09/18/1985 | EP0154778A1 Percussion drill |
| 09/12/1985 | WO1985003963A1 Reversible pneumatic impacting device for forming wells in the soil |
| 09/03/1985 | US4538522 Cable gripping apparatus having forward and rearward movement capabilities |
| 08/27/1985 | US4537265 Self propelled reversible boring ram |
| 08/13/1985 | US4534427 Abrasive containing fluid jet drilling apparatus and process |
| 08/13/1985 | US4534422 Fluid operated hammer |
| 08/01/1985 | WO1985003326A1 Downhole motor and bearing assembly |
| 07/30/1985 | US4531593 Substantially self-powered fluid turbines |
| 07/24/1985 | EP0149528A1 Device for replacing mains |
| 07/24/1985 | EP0149290A2 Intermittently rotating drilling tool |
| 07/23/1985 | US4530408 Porting system for pneumatic impact hammer |
| 07/23/1985 | US4530407 Fluid operated hammer |
| 07/16/1985 | US4529046 Device for producing boreholes in coal or the like |
| 07/09/1985 | US4527641 Percussion tool |
| 07/09/1985 | US4527637 Cycloidal drill bit |
| 07/03/1985 | EP0146918A1 Tunnel boring system for driving tunnels by means of pipe pushing |
| 07/02/1985 | US4526242 Drilling device |
| 06/25/1985 | US4525178 With precemented carbide; wear resistance; impact strength |
| 06/11/1985 | US4522234 Multiple conduit drill pipe |
| 06/04/1985 | US4520886 Rotary drilling tool with percussion device |
| 06/04/1985 | CA1188292A1 Percussion hammer drill with upper end cocking spring |
| 06/04/1985 | CA1188291A1 Fluid operated hammer |
| 05/23/1985 | WO1985002215A1 Improvements in pipe laying and replacement |
| 05/21/1985 | US4518051 Percussion actuated core sampler |
| 05/21/1985 | US4518050 Rotating double barrel core sampler |
| 05/21/1985 | US4518049 Bottom hole motor for driving rock-breaking tool |
| 05/07/1985 | US4515225 Mud energized electrical generating method and means |
| 05/07/1985 | CA1186592A1 Hydraulic reciprocating device |
| 04/23/1985 | US4512422 Apparatus for drilling oil and gas wells and a torque arrestor associated therewith |
| 04/23/1985 | US4512417 For a downhole drill |
| 04/23/1985 | CA1185895A1 Quick release downhole motor coupling |
| 04/16/1985 | US4511193 Thrust and radial bearing assembly |
| 04/09/1985 | US4509606 Axial return hammer |
| 03/27/1985 | EP0030970B1 Apparatus and method for drilling into the sidewall of a drill hole |
| 02/26/1985 | US4501521 Locking fastener assembly |
| 02/26/1985 | US4501454 In a drifting tool |
| 02/19/1985 | CA1182652A1 Cable following apparatus utilizing a releasable cable gripping mechanism |
| 01/29/1985 | CA1181739A1 Thrust generator for boring tools |
| 01/15/1985 | US4493381 Turbodrill with a reduced drilling fluid pressure on a floating piston |
| 01/09/1985 | EP0130494A1 Method of protecting a mechanical system with limited movement in an aggressive environment |
| 01/08/1985 | US4492276 Down-hole drilling motor and method for directional drilling of boreholes |
| 01/02/1985 | EP0129861A1 Oscillating thrust-bearing device |
| 01/01/1985 | US4491022 Cone-shaped coring for determining the in situ state of stress in rock masses |
| 12/18/1984 | CA1179668A1 Rotating shaft seal and bearing lubricating apparatus |
| 12/11/1984 | US4487274 Rock drills |
| 12/04/1984 | US4485880 Direct drive for deep-well drilling |
| 12/04/1984 | US4485879 Downhole motor and method for directional drilling of boreholes |
| 12/04/1984 | CA1178943A1 Down-the-hole percussion hammer |
| 12/04/1984 | CA1178861A1 Drill hammer with variable air consumption |
| 11/27/1984 | US4484753 Rotary shaft seal |
| 11/27/1984 | CA1178704A1 Separable drill hole transmitting device |
| 11/22/1984 | WO1984004554A1 Device for digging wells in the soil |
| 11/20/1984 | US4483394 Hydraulic power unit for measurement while drilling apparatus |
| 11/13/1984 | CA1177819A1 Articulated coupling |
| 11/06/1984 | US4480525 Control device for forward and backward travel of automatic _pneumatic percussion boring devices |
| 11/06/1984 | CA1177513A1 Generator for producing electric power |
| 11/06/1984 | CA1177477A1 Direct drive bit for deep well drilling tools |
| 10/23/1984 | US4478296 Drill bit having multiple drill rod impact members |
| 10/16/1984 | US4476944 Method of providing a fluid seal in downhole drilling apparatus |
| 10/16/1984 | CA1176155A1 Valve means |
| 10/09/1984 | US4475605 Turbodrill |
| 10/02/1984 | US4474252 Method and apparatus for drilling generally horizontal bores |
| 10/02/1984 | CA1175413A1 Mud by-pass regulator apparatus for measurement while drilling system |
| 09/11/1984 | US4470464 For installation in a well bore |
| 09/11/1984 | CA1174230A1 Turbodrill |
| 08/28/1984 | US4468762 Telemetry equipment in modules |
| 08/21/1984 | US4466487 Method and apparatus for preventing vertical movement of subsea downhole tool string |
| 08/14/1984 | US4465147 Method and means for controlling the course of a bore hole |
| 08/07/1984 | US4463814 Down-hole drilling apparatus |
| 08/01/1984 | EP0114584A2 Chain cutter excavator |
| 08/01/1984 | EP0022865B1 Hydraulically-driven downhole drill |
| 07/31/1984 | US4462472 Marine bearing for a downhole drilling apparatus |
| 07/31/1984 | US4462469 Fluid motor and telemetry system |
| 07/31/1984 | US4462468 Ram head for self-driven pneumatic ram drills |
| 06/19/1984 | CA1169415A1 Fluid actuated motor |