| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 02/14/1989 | US4804051 Method of predicting and controlling the drilling trajectory in directional wells |
| 02/14/1989 | US4804050 Method of underground fluid sampling |
| 02/08/1989 | EP0302269A1 Slant service rig |
| 02/08/1989 | CN1030960A 采掘机 Mining machine |
| 02/02/1989 | DE3724619A1 Boring ram |
| 02/01/1989 | EP0301671A2 Method of magnetizing well tubulars |
| 02/01/1989 | EP0301287A2 Boring ram |
| 02/01/1989 | EP0301116A1 Submergible electrohydraulic drive unit for hammering and servicing devices in under water operation |
| 02/01/1989 | EP0301114A1 Process for driving pile sections under water |
| 02/01/1989 | EP0301113A1 Device for cutting tubular foundation piles under water |
| 02/01/1989 | EP0301060A1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground. |
| 01/31/1989 | US4800966 Devices for drilling branched wells |
| 01/26/1989 | DE3722653A1 Method of constructing a ground-water measuring point and device for carrying out the method |
| 01/25/1989 | EP0300986A1 Rock drilling rig |
| 01/25/1989 | EP0300874A1 Machine for drilling by way of rotation and by alternating rotation |
| 01/25/1989 | EP0300080A1 Device for drilling through cappings |
| 01/24/1989 | US4799556 Drilling boom |
| 01/19/1989 | DE3721448A1 Casing adaptor |
| 01/18/1989 | EP0299624A2 Apparatus and method for installing a conduit within an arcuate bore |
| 01/17/1989 | CA1248937A1 Rock drill with tunnel profile control system |
| 01/17/1989 | CA1248936A1 Device for the remote actuation of an appliance associated with a duct in which an incompressible fluid circulates, particularly a device for actuating a stabilizer of a set of drill rods |
| 01/17/1989 | CA1248870A1 System for installing subsea wellhead protective silo |
| 01/17/1989 | CA1248825A1 Reversible pneumatic underground piercing tool |
| 01/12/1989 | WO1989000236A1 Selectively phased water supply of a cutter head |
| 01/12/1989 | WO1989000235A1 Cutting or roller bit |
| 01/12/1989 | DE3721526A1 Rotary drilling rig for producing cased boreholes |
| 01/11/1989 | EP0298828A1 Apparatus for remotely controlling the relative orientation of two pieces of a pipe string |
| 01/11/1989 | EP0298537A2 Device and method for underreaming a borehole |
| 01/10/1989 | US4797029 Remotely installing a tubular string |
| 01/10/1989 | US4796347 Plastic-pipe pulling tool |
| 01/10/1989 | CA1248443A1 Marine riser fill-up valve |
| 01/05/1989 | DE3815232C1 Pipe-widening apparatus, in particular for disposal lines in refuse landfills |
| 01/03/1989 | CA1247869A1 Device and method for removing irregularities in or enlarging an underground duct |
| 12/29/1988 | WO1988010393A1 Apparatus for working in pipes |
| 12/29/1988 | WO1988010355A1 Device for guiding a drilling tool and/or pipe string |
| 12/28/1988 | EP0296788A2 Electrical conductor arrangements for pipe system |
| 12/28/1988 | CN88103550A Nozzle assembly for fluid jet cutting system |
| 12/28/1988 | CN87103924A Secondary-controlled shock unit |
| 12/21/1988 | EP0295868A1 Nozzle assembly for fluid jet cutting system |
| 12/20/1988 | CA1247000A1 Method and apparatus for producing viscous hydrocarbons utilizing a hot stimulating medium |
| 12/15/1988 | WO1988009864A1 Assembly for and method of coupling adjacent sections of a string of pipes |
| 12/13/1988 | US4790395 Pipe-driving apparatus |
| 12/13/1988 | US4790394 Hydraulic drilling apparatus and method |
| 12/13/1988 | US4790384 Hydraulic well penetration apparatus and method |
| 12/13/1988 | CA1246723A1 Method and apparatus for monitoring ice masses |
| 12/08/1988 | DE3809626A1 Mobile drilling rig |
| 12/08/1988 | DE3730372C1 Method and device for the control of the movement of a drill carriage |
| 12/07/1988 | EP0294088A2 Assembly for and method of coupling adjacent sections of a string of pipes |
| 12/07/1988 | EP0293584A1 Drilling device for high pressure injection method |
| 12/06/1988 | US4789268 Device and method for removing irregularities in or enlarging an underground duct |
| 12/06/1988 | US4789032 Orienting and circulating sub |
| 11/30/1988 | CN88102869A Cutter assembly for rotary boring of earth |
| 11/29/1988 | US4787465 Hydraulic drilling apparatus and method |
| 11/29/1988 | US4787463 Method and apparatus for installment of underground utilities |
| 11/29/1988 | US4787457 Method and apparatus for rotating casing string segment |
| 11/29/1988 | US4787142 Exothermic cutting electrode |
| 11/29/1988 | CA1245622A1 Feed beam for a rock drill |
| 11/29/1988 | CA1245621A1 Apparatus for use in drilling |
| 11/22/1988 | US4785898 Device for making holes in soil |
| 11/22/1988 | US4785892 Pile driver, pile drawer and/or drilling machine |
| 11/22/1988 | US4785885 Method and apparatus for cementing a production conduit within an underground arcuate bore |
| 11/22/1988 | CA1245212A1 Method and system of drilling deviated wellbores |
| 11/17/1988 | EP0291193A1 Method for cementing a production conduit within an underground arcuate bore |
| 11/17/1988 | EP0291011A1 Rerounding apparatus |
| 11/17/1988 | EP0291005A2 Method and apparatus for logging deep wells which are curved or deviate in a horizontal direction |
| 11/17/1988 | EP0290839A2 PCD Enhanced radial bearing |
| 11/15/1988 | US4784230 For drilling an underground pilot bore hole |
| 11/15/1988 | US4784223 Packing pellets injected as slurries |
| 11/15/1988 | CA1244856A1 Robot arm |
| 11/09/1988 | EP0290250A2 Method and apparatus for deepwater drilling |
| 11/09/1988 | EP0289988A1 Rotating tool for undercutting in a drill hole |
| 11/09/1988 | CN88102408A Improved hydraulia well penetration apparatus and method |
| 11/03/1988 | WO1988008480A1 Process for installing an underground pipe and the installation concerned |
| 11/02/1988 | EP0288527A1 Earth boring apparatus |
| 11/01/1988 | CA1244000A1 Guided earth boring tool |
| 11/01/1988 | CA1243911A1 Reversible air-operated percussive action machine for driving holes in the ground |
| 10/26/1988 | CN88102073A Whipstock packer assembly |
| 10/25/1988 | CA1243663A1 Adjustable bent sub |
| 10/19/1988 | EP0287183A2 Tubular element for use in a rotary drilling assembly |
| 10/19/1988 | EP0287155A2 Assembly for directional drilling of boreholes |
| 10/13/1988 | DE3709932A1 Cutting shoe for pressure drilling installations for the trenchless laying of pipelines or the like |
| 10/12/1988 | EP0286500A1 Apparatus for controlled directional drilling, and process for controlling the apparatus |
| 10/11/1988 | US4776769 System for removing material with a high velocity jet of working fluid |
| 10/11/1988 | US4776638 Using probes; spraying air, steam, electrolytes, catalysts; electric arcs |
| 10/06/1988 | DE3809768A1 Method and apparatus for extraction underground |
| 10/05/1988 | EP0285505A1 Process and device for controlling the path of a drill bit at a drill string |
| 10/05/1988 | EP0284759A1 Hammer |
| 10/04/1988 | US4775017 Drilling using downhole drilling tools |
| 10/04/1988 | US4775016 Downhole pressure fluctuating feedback system |
| 10/04/1988 | US4775015 Sliding-weight operated hole boring tool |
| 09/27/1988 | US4773491 Drill head assembly |
| 09/27/1988 | US4773488 Development well drilling |
| 09/27/1988 | CA1242490A1 Coated exothermic cutting electrode |
| 09/15/1988 | DE3728269C1 Overburden drilling device |
| 09/15/1988 | DE3706755A1 Drilling head of a horizontal driving machine for controlled line-tunnel construction in the non-man-sized diameter range |
| 09/13/1988 | US4770563 Device for connecting lines associated with an offshore drilling equipment |
| 09/13/1988 | US4770259 Drill tool |
| 09/13/1988 | US4770258 Well deviation control tool |
| 09/13/1988 | US4770256 For consolidating lining of walls of a bore hole to prevent a cave-in |
| 09/13/1988 | US4770255 Arrangement for underwater drilling of foundations |