Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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04/14/1987 | US4657436 Device and method for removing irregularities in or enlarging an underground duct |
04/14/1987 | CA1220416A1 Multi-drain drilling and petroleum production start- up device |
04/14/1987 | CA1220385A1 Vessel mooring system |
04/09/1987 | WO1987002091A1 A method and a device for deep hole drilling |
04/09/1987 | DE3534662A1 Guided driving head of an apparatus for penetrating the soil |
04/08/1987 | CN85107194A Drilling method by means of diving hole hammer driven by supercharging machine |
04/07/1987 | US4655299 Drilling assembly |
04/01/1987 | EP0216100A2 Boring ram with a piston-actuated percussion cutter |
04/01/1987 | EP0215998A2 A pile driver, pile drawer and/or drilling machine |
03/31/1987 | US4653810 Pre-bolting system for underground mines |
03/31/1987 | US4653598 Drainhole drilling assembly with oriented elliptic drill collar |
03/31/1987 | US4653594 Vibration generating apparatus |
03/26/1987 | DE3625577A1 Small drilling device |
03/24/1987 | US4651834 Melting, heaters |
03/24/1987 | CA1219577A1 Rotating boring tool with percussion device |
03/17/1987 | US4650374 Apparatus for driving pipes through the ground |
03/17/1987 | US4650011 Method and apparatus for drilling a hole in an ice formations and pumping water out from such hole |
03/17/1987 | CA1219253A1 In-the-hole drill |
03/10/1987 | US4649349 Device for automatically compensating the magnetism of drill string members |
03/10/1987 | US4648746 Pipe laying and replacement |
03/10/1987 | US4648469 Alleviating vortex shedding stress problems |
03/10/1987 | US4648454 Robot |
03/05/1987 | DE3628328A1 Apparatus for making narrow cuts or trenches |
03/04/1987 | EP0212316A1 Drill string for deflection drilling, method of using such a string and deflecting device used in this string |
03/04/1987 | EP0211926A1 Drilling pipe for making a drill string |
03/04/1987 | EP0211925A1 Drilling pipe for making a drill string |
03/03/1987 | US4646856 Downhole motor assembly |
03/03/1987 | US4646855 Method for raising and lowering a drill string in a wellbore during drilling operations |
03/03/1987 | US4646836 Tertiary recovery method using inverted deviated holes |
02/25/1987 | EP0211725A1 Device for positioning a tool in a drain pipe of a drilled well |
02/24/1987 | US4646277 Control for guiding a boring tool |
02/24/1987 | US4645084 Robot arm |
02/17/1987 | US4643264 Method for reducing drilling torque in the drilling of a deviated wellbore |
02/17/1987 | CA1218052A1 Method for improving cuttings transport in deviated wells |
02/12/1987 | DE3631424A1 Method of disposing of harmful substances with simultaneous energy generation |
02/11/1987 | CN86200087U Slant-proof apparatus for level hole drilling |
02/10/1987 | US4641717 Connector housing |
02/10/1987 | US4641716 Method and equipment for rock drilling |
02/10/1987 | CA1217759A Drilling equipment |
02/10/1987 | CA1217758A System to control the vertical movement of a drillstring |
02/04/1987 | EP0210735A2 Improvements in or relating to drilling apparatus |
02/03/1987 | US4640552 Method and apparatus for splitting ice masses |
02/03/1987 | US4640369 Slide bar mining bolting machine |
02/03/1987 | US4640362 Well penetration apparatus and method |
02/03/1987 | US4640353 Electrode well and method of completion |
02/03/1987 | CA1217474A1 Angle drilling apparatus |
02/03/1987 | CA1217473A1 Method of and arrangement for positioning of a drilling apparatus |
02/03/1987 | CA1217472A1 Method and apparatus for controlling azimuthal drift of a drill bit |
01/31/1987 | CN85102785A Underearth propeller |
01/28/1987 | EP0209686A2 Process and device for pretreating an old underground pipeline for replacement by a new one |
01/27/1987 | US4639868 Control method for drilling apparatus which makes use of a final drilling pattern transformed from primary and secondary patterns |
01/27/1987 | US4638873 Direction and angle maintenance tool and method for adjusting and maintaining the angle of deviation of a directionally drilled borehole |
01/27/1987 | US4638871 Earth drill rig |
01/27/1987 | CA1217182A1 Surface controlled bent sub for directional drilling of petroleum wells |
01/21/1987 | EP0209318A2 Control of drilling courses in the drilling of bore holes |
01/21/1987 | EP0209217A2 Apparatus and method for forming an enlarged underground arcuate bore and installing a conduit therein |
01/20/1987 | US4637756 Apparatus for removing and replacing pipe beneath an earthfill |
01/20/1987 | US4637480 Azimuth measuring method for non-vertical drilling |
01/20/1987 | US4637479 Methods and apparatus for controlled directional drilling of boreholes |
01/20/1987 | US4637475 In-the-hole drill |
01/14/1987 | EP0208038A2 Energy dissipating receptacle for fluid jet cutting systems |
01/13/1987 | US4635738 Drill bit |
01/13/1987 | US4635736 Drill steering apparatus |
01/07/1987 | EP0207925A2 Gallery driving machine |
01/07/1987 | EP0207576A1 Apparatus for determining the positioning and measuring the depth, on which a construction or object is positioned in the ground |
01/07/1987 | CN86104189A Vessel for dicrease the energy of high speed jeted flow liquid |
01/06/1987 | US4634313 Pipe laying and replacement |
01/06/1987 | US4633953 Method for offshore production of hydrocarbons concurrently with the installation of a structure therefor |
01/06/1987 | CA1216276A1 Apparatus and method for extracting horizontal underground pipe |
12/30/1986 | US4632194 Self-propelled saverdrill |
12/30/1986 | US4632191 Steering system for percussion boring tools |
12/30/1986 | EP0206855A1 Method and device for detecting a fluid flow |
12/30/1986 | CA1215965A1 Slip assembly for subsea template |
12/23/1986 | US4630967 Arrangement for underground advance driving of pipe trains composed of individual pipe lengths |
12/23/1986 | US4630689 Pump drive |
12/23/1986 | US4630681 Multi-well hydrocarbon development system |
12/23/1986 | CA1215551A1 Assembly of conductor guides for offshore drilling platform |
12/17/1986 | EP0201398A1 Composition for oriented drilling |
12/16/1986 | US4629012 Drainhole drilling assembly |
12/16/1986 | US4629010 Process and device for sinking wells |
12/16/1986 | US4629008 Reversible percussive action machine |
12/10/1986 | EP0204474A1 Methods and apparatus for controlled directional drilling of boreholes |
12/10/1986 | EP0204187A1 Improved erosive-jet diver tool |
12/09/1986 | US4627502 Liquid-filled collar for tool string |
12/09/1986 | US4627499 Mobile drilling machine |
12/09/1986 | CA1215115A1 Device for automatically compensating the magnetism of drill rods |
12/03/1986 | EP0203907A1 Drill wagon for drilling excavation and rockbolt holes |
12/03/1986 | CN86102188A Trench excavator |
12/02/1986 | US4626134 Apparatus and method for extracting horizontal underground pipe |
12/02/1986 | US4625815 Drilling equipment, especially for use in underground mining |
12/02/1986 | CA1214768A1 Hydraulic piston-effect method and apparatus for forming a bore hole |
11/26/1986 | EP0202310A1 A method for establishing a connection from the sea bed to a tunnel positioned below |
11/25/1986 | US4624605 Shield tunneling apparatus |
11/25/1986 | US4624328 In-shaft drilling apparatus for recovery of gas from subterranean formations |
11/25/1986 | US4624327 Method for combined jet and mechanical drilling |
11/25/1986 | US4624326 Process and apparatus for cutting rock |
11/25/1986 | US4624318 Method and means for storing a marine riser |
11/20/1986 | WO1986006784A1 Well tool for use with down-hole drilling apparatus |
11/20/1986 | EP0202013A2 Steering and control system for percussion boring tools |
11/19/1986 | CN85103611A Sleeve-type drilling-direction changer |