| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 05/10/1986 | CN85108010A 钻机 Rig |
| 05/10/1986 | CN85105755A 地下钻机 Underground drilling rig |
| 05/09/1986 | WO1986002695A1 Device for connecting a boring line with a tube or similar item |
| 05/07/1986 | EP0180169A1 Transportable working tool for the underground driving of product pipes |
| 05/06/1986 | US4586571 Method of and arrangement for positioning of a drilling apparatus |
| 04/30/1986 | EP0179286A1 Shield type tunneling machine |
| 04/29/1986 | US4585080 Portable rotary earth drilling apparatus |
| 04/24/1986 | WO1986002403A1 Method and apparatus for combined jet and mechanical drilling |
| 04/15/1986 | US4582147 Directional drilling |
| 04/15/1986 | CA1203309A1 Method and apparatus for controlling the position of a hydraulic boom |
| 04/15/1986 | CA1203228A1 Installation and levelling of subsea templates |
| 04/15/1986 | CA1203227A1 Rock drilling apparatus |
| 04/10/1986 | CN85108188A Drilling and /or lifting machine |
| 04/10/1986 | CN85108187A Pile driver, pile drawer and/or drilling machine |
| 04/10/1986 | CN85107766A Shield type tunneling machine |
| 04/08/1986 | US4580795 Apparatus for installing anchors |
| 04/08/1986 | US4580642 Zero deviation drill bits |
| 04/08/1986 | CA1202955A1 Drill bit for jet assisted rotary drilling |
| 04/01/1986 | CA1202560A1 Solid surface erosion device using a cavitating flow |
| 03/27/1986 | WO1986001846A2 Lining underground ducts |
| 03/25/1986 | US4577703 Apparatus for making boreholes in the lateral walls of narrow underground mine workings |
| 03/25/1986 | US4577701 System of drilling deviated wellbores |
| 03/19/1986 | EP0174603A1 Azimuth-measuring method for inclined boreholes |
| 03/18/1986 | US4576515 Pipe laying apparatus |
| 03/18/1986 | CA1201973A1 Apparatus and method for attaching a template at a subsea production site |
| 03/05/1986 | EP0091463B1 Underwater cutting torch |
| 03/04/1986 | US4574241 Marine surveying apparatus and method for locating pipelines buried under the seabed |
| 03/04/1986 | US4573541 Multi-drain drilling and petroleum production start-up device |
| 03/04/1986 | US4573540 Method for drilling deviated wellbores |
| 02/27/1986 | WO1986001251A1 Portable apparatus for and method of pole reinforcement |
| 02/26/1986 | EP0044871B1 Method of burying wire, tube or cable under ground |
| 02/25/1986 | US4572582 Earth battery using veined material such as coal as first electrode, and placing second electrode in metal to be mined |
| 02/25/1986 | US4572305 Drilling apparatus |
| 02/25/1986 | US4572304 Portable seabed penetration system |
| 02/19/1986 | EP0171554A2 Pile-driver device |
| 02/19/1986 | EP0171521A2 Drilling device for holes having undercuttings at different positions |
| 02/18/1986 | US4571122 Pipe laying apparatus |
| 02/18/1986 | US4570723 Machine for driving holes in the ground |
| 02/18/1986 | US4570717 Anti-twist control system for deviated conductor driving systems |
| 02/12/1986 | EP0171259A1 Method and system of drilling deviated wellbores |
| 02/12/1986 | EP0171038A2 Under reaming pile bore excavating bucket and method of its excavation |
| 02/04/1986 | US4568126 Method and machine for removing blockage and silt from abandoned auger holes |
| 01/29/1986 | EP0169393A1 Device for producing boreholes at an inaccessible cross-section |
| 01/28/1986 | US4566824 System for drilling from a water surface, which is insensitive to the swell |
| 01/28/1986 | CA1199944A1 Working platform for a drilling apparatus |
| 01/22/1986 | EP0168553A1 Method and apparatus for cutting rock |
| 01/16/1986 | WO1986000357A1 Pneumatic reversible percussion device |
| 01/15/1986 | EP0167979A1 Lateral hole boring method and apparatus |
| 01/08/1986 | EP0167090A2 Cutting wheel apparatus for excavating cut-off trenches |
| 01/02/1986 | WO1986000111A1 Controllable downhole directional drilling tool |
| 12/31/1985 | US4561803 Conductor guide system for offshore drilling platform |
| 12/31/1985 | US4561802 Assembly of conductor guides for offshore drilling platform |
| 12/27/1985 | EP0165479A2 Drill pipe |
| 12/24/1985 | US4560013 Apparatus for directional drilling and the like of subterranean wells |
| 12/24/1985 | US4560012 Drill collar structure for use in deviated well bore drilling |
| 12/24/1985 | CA1198411A1 Drilling apparatus |
| 12/20/1985 | CN85100828A Geologic drilling rig mounted on automobile |
| 12/17/1985 | US4558750 Method and apparatus for forming boreholes |
| 12/17/1985 | US4558748 Method and equipment for boring and casing air vent holes and/or delivery holes in medium-steep and steep dip coal deposits and rocks of loose structure |
| 12/17/1985 | US4558744 Subsea caisson and method of installing same |
| 12/17/1985 | US4558742 Method and apparatus for gravel packing horizontal wells |
| 12/17/1985 | CA1198049A1 Subsea wellhead assembly |
| 12/11/1985 | EP0163946A1 Apparatus for optional straight or directional drilling underground formations |
| 12/10/1985 | CA1197835A1 Down-hole drilling apparatus |
| 12/04/1985 | EP0162981A1 Divided-bucket type rotary excavator |
| 12/04/1985 | EP0162878A1 Improvements in pipe laying and replacement. |
| 11/27/1985 | EP0162190A1 Device for optionally drilling under-ground formations, straight or directionally |
| 11/26/1985 | US4555064 Pebble-stone crushing device for use in excavator for laying pipelines underground |
| 11/26/1985 | US4554984 Drill box support mechanism for mining bolter machines |
| 11/26/1985 | US4554982 In an earth formation |
| 11/19/1985 | US4553879 Pipelaying in artic offshore waters |
| 11/19/1985 | US4553612 Earth boring machine |
| 11/19/1985 | US4553595 Method for forming a gravel packed horizontal well |
| 11/19/1985 | US4553443 High frequency vibratory systems for earth boring |
| 11/13/1985 | EP0160678A1 Improved drilling method and apparatus. |
| 11/05/1985 | US4550788 Roof bolt hole groover |
| 11/05/1985 | US4550787 Earth boring machine and working crane |
| 11/05/1985 | CA1196267A1 Method and means for controlling the course of a bore hole |
| 10/30/1985 | EP0159974A2 A feed beam for a rock drill |
| 10/30/1985 | EP0159801A1 Spherical bit |
| 10/30/1985 | EP0159573A1 Process and device for the controlled advancing of under-ground pipes in inaccesible cross-sectional areas |
| 10/29/1985 | US4549615 Single-pass notching and drilling tool and method of drilling a blast role therewith |
| 10/23/1985 | EP0158788A1 Tube driving device with triple rams |
| 10/22/1985 | US4548282 Method for sinking boreholes |
| 10/22/1985 | CA1195516A1 Cable gripping apparatus having forward and rearward movement capabilities |
| 10/22/1985 | CA1195515A1 Cable following apparatus having cable cleaning capabilities and method |
| 10/15/1985 | US4546835 Horizontal earth boring directional guide |
| 10/15/1985 | CA1195128A2 Replacement of mains |
| 10/09/1985 | EP0157395A2 Whirl nozzle as a hydraulic tool |
| 10/08/1985 | US4545443 Means for drilling |
| 10/08/1985 | US4545442 Method and apparatus for forming a heat exchange system in the earth |
| 10/08/1985 | CA1194856A1 Method of installing subsea templates |
| 10/08/1985 | CA1194777A1 Underwater cutting tool |
| 10/02/1985 | EP0155990A2 Pipe laying apparatus |
| 10/01/1985 | US4544176 Tractor mounted hydraulic control mechanism for an earth working tool |
| 10/01/1985 | US4544139 Coated exothermic cutting electrode |
| 10/01/1985 | US4544041 Well casing inserting and well bore drilling method and means |
| 10/01/1985 | CA1194410A1 Subsea caissons |
| 09/25/1985 | EP0155768A2 Contamination removal system and method |
| 09/25/1985 | EP0155598A2 Method for the underground gasification of coal |