| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 09/13/1988 | CA1241974A1 Shield type tunneling machine |
| 09/07/1988 | EP0280705A1 Process and device for producing drilling holes from an angled position in relation to the drilling axes. |
| 09/06/1988 | US4768709 Process and apparatus for generating particulate containing fluid jets |
| 09/06/1988 | US4768599 Drill bit for undercutting a blind bore |
| 08/30/1988 | US4767236 Sewer renovation by expanding a liner within the sewer and placing a new pipe within the expanded liner |
| 08/25/1988 | WO1988006209A1 Device for opening gas sources in refuse tips, and for exploring and cleansing materials for recycling and contaminated ground |
| 08/23/1988 | US4765415 For increasing the drilling rate and drilling kife of a drill bit |
| 08/23/1988 | US4765404 Whipstock packer assembly |
| 08/23/1988 | US4765173 Well penetration apparatus |
| 08/16/1988 | US4764036 PCD enhanced radial bearing |
| 08/16/1988 | US4763954 Excavator and conveyor of an underground pipeline jacking apparatus |
| 08/16/1988 | US4763735 Mobile machine for making holes in putting greens |
| 08/16/1988 | US4763734 Earth drilling method and apparatus using multiple hydraulic forces |
| 08/11/1988 | WO1988005711A1 Method and device for thermoabrasive surface processing |
| 08/11/1988 | DE3703134A1 Underground pipe-driving method and construction set for carrying out this method |
| 08/10/1988 | EP0277840A2 Modular near-surface completion system |
| 08/10/1988 | EP0277433A1 Device for upholding the rectilinearity of a borehole |
| 08/09/1988 | US4762186 Medium curvature directional drilling method |
| 08/09/1988 | US4762180 Modular near-surface completion system |
| 08/09/1988 | CA1240310A1 Apparatus and method for driving casing and conductor pipe |
| 08/09/1988 | CA1240309A1 Method for drilling deviated wellbores |
| 08/04/1988 | DE3701851A1 Device on an apparatus working underground for driving pipelines |
| 08/02/1988 | US4761039 Cutting head for removing material with a high velocity jet of working liquid |
| 08/02/1988 | US4760890 Cutter assembly for rotary boring of earth |
| 07/28/1988 | WO1988005491A1 Fusion-drilling process |
| 07/26/1988 | US4759413 Method and apparatus for setting an underwater drilling system |
| 07/21/1988 | DE3700587A1 Process for atomising and atomiser of a high-pressure liquid jet emerging from a nozzle |
| 07/20/1988 | CN86108916A Well penetration apparatus and method |
| 07/13/1988 | EP0273974A1 Device for making holes in ground |
| 07/13/1988 | CN87107394A Well completion process using polymer gel |
| 07/12/1988 | US4756644 Rerounding apparatus |
| 07/12/1988 | CA1239027A1 Apparatus for installing anchors |
| 07/07/1988 | DE3642694A1 Drilling rig |
| 07/05/1988 | US4754929 Nozzle assembly for fluid jet cutting system |
| 07/05/1988 | US4754821 For use in an adjustable stabilizer |
| 07/05/1988 | US4754819 Method for improving cuttings transport during the rotary drilling of a wellbore |
| 07/05/1988 | US4754817 Subsea well template for directional drilling |
| 07/05/1988 | US4754526 System including a multi-stepped nozzle assembly for back-boring an inground passageway |
| 07/05/1988 | CA1238894A1 Ice drilling system |
| 07/05/1988 | CA1238893A1 Method and device for earth boring |
| 06/30/1988 | WO1988004718A1 Well completion process using a polymer gel |
| 06/29/1988 | EP0272905A2 Nozzle assembly for enlarging an inground passageway |
| 06/28/1988 | US4753485 Recovering minerals from a subsurface earth formation |
| 06/28/1988 | US4753300 Hydraulic top drive for wells |
| 06/23/1988 | DE3737024A1 Drilling device, in particular for core holes |
| 06/22/1988 | EP0271933A1 Method for raising any object lying on the bottom of the sea, a river or basin, and apparatus used thereby |
| 06/22/1988 | EP0271631A1 Ramming and drilling apparatus |
| 06/21/1988 | US4751971 Automatic augering device and method |
| 06/16/1988 | DE3641982A1 Process for producing cavities in refuse dumps |
| 06/14/1988 | US4750770 Device for connecting a drill column to a pipe or the like |
| 06/14/1988 | US4750571 Screen placement method and apparatus |
| 06/14/1988 | US4750561 Gravel packing system for a production radial tube |
| 06/08/1988 | EP0270458A1 Ground drilling device working along a substantially horizontal axis |
| 06/08/1988 | EP0269653A1 Apparatus for correcting irregularities in or enlarging an underground duct. |
| 06/08/1988 | EP0269638A1 A method and a device for deep hole drilling. |
| 06/07/1988 | US4749050 Through the ground |
| 06/01/1988 | DE3641938A1 Shaft-boring appliance |
| 05/31/1988 | US4747303 Method determining formation dip |
| 05/25/1988 | CN87204495U Simple well drilling rig |
| 05/24/1988 | US4746245 Offshore drilling and/or production system |
| 05/24/1988 | US4745982 Adjustable bent sub |
| 05/24/1988 | CA1237118A1 Mains bursting tool |
| 05/17/1988 | US4744698 Method and apparatus for installing marine silos |
| 05/17/1988 | US4744420 For exacuating solids |
| 05/17/1988 | CA1236826A1 Drilling boom |
| 05/17/1988 | CA1236825A1 Method and apparatus for selectively straight or directional drilling in subsurface rock formations |
| 05/11/1988 | EP0266386A1 Improvements in drilling using downhole drilling tools. |
| 05/10/1988 | US4742876 Submarine drilling device |
| 05/10/1988 | US4742871 Device for positioning a tool within a wellbore flow string |
| 05/05/1988 | WO1988003245A1 Method and device for replacing damaged pipes buried in the ground |
| 05/05/1988 | WO1988003222A1 Apparatus for controlling the operation of a downhole tool |
| 05/05/1988 | WO1988003221A1 Earth boring apparatus |
| 05/04/1988 | EP0187736B1 A drilling machine to be coupled to an excavator |
| 05/03/1988 | US4741405 Focused shock spark discharge drill using multiple electrodes |
| 04/27/1988 | EP0265344A1 Method for producting a pile in the ground, drilling machine and device for carrying out such a method |
| 04/27/1988 | EP0198896B1 Device for connecting a boring line with a tube or similar item |
| 04/27/1988 | EP0185739A4 Controllable downhole directional drilling tool. |
| 04/27/1988 | EP0160678B1 Improved drilling method and apparatus |
| 04/26/1988 | US4740107 Method and apparatus for protecting a shallow-water well |
| 04/26/1988 | US4739843 Apparatus for lateral drilling in oil and gas wells |
| 04/26/1988 | US4739842 Apparatus for optional straight or directional drilling underground formations |
| 04/26/1988 | US4739841 Methods and apparatus for controlled directional drilling of boreholes |
| 04/26/1988 | US4739840 Method and apparatus for protecting a shallow water well |
| 04/26/1988 | CA1235686A1 Apparatus for optional straight or directional drilling underground formations |
| 04/19/1988 | US4738812 Method of forming an electrode structure |
| 04/19/1988 | US4738565 Method of replacing mains |
| 04/13/1988 | EP0263281A1 Pneumatic boring ram |
| 04/13/1988 | CN87106795A Boring apparatus |
| 04/12/1988 | US4736987 Rock cutting assembly |
| 04/12/1988 | US4736808 Percussive tool with high pressure fluid jet |
| 04/12/1988 | US4736805 Hydraulic breaker with high pressure water attachment |
| 04/12/1988 | US4736804 Overhead drill jig |
| 04/12/1988 | CA1235110A1 Method and system of drilling deviated wellbores |
| 04/07/1988 | WO1988002435A1 Boring apparatus |
| 04/06/1988 | EP0263088A2 Rotary drilling tool with an expansible reamer |
| 04/06/1988 | EP0262882A2 Homing system for an in-ground boring device |
| 03/30/1988 | CN87204435U Multifunctional deep hole-drilling carriage |
| 03/29/1988 | US4733733 Method of controlling the direction of a drill bit in a borehole |
| 03/29/1988 | US4733732 Submudline drivepipe whipstock method and apparatus |
| 03/29/1988 | US4733731 Air-operated reversible percussive action machine |