| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 09/12/1996 | DE19544286A1 Underground pipeline laying mechanism with drive |
| 09/12/1996 | DE19517414A1 Method of breaking up structures erected in ground |
| 09/11/1996 | EP0731252A2 Boring ram for the destructive replacement of a buried pipe |
| 09/11/1996 | EP0702746A4 System for in situ replacement of cutting means for a ground drill |
| 09/10/1996 | US5553680 For use in a predrilled vertical well bore casing |
| 09/10/1996 | US5553679 Modulated bias unit for rotary drilling |
| 09/10/1996 | US5553678 Modulated bias units for steerable rotary drilling systems |
| 09/10/1996 | US5553676 Reversible expander |
| 09/10/1996 | US5553671 Piston sub for isolating drilling fluids from hydraulic fluids |
| 09/06/1996 | WO1996027067A1 Method of inserting a pipe into the ground |
| 09/06/1996 | WO1996027066A1 Plasma blasting probe assembly |
| 09/06/1996 | CA2213492A1 Plasma blasting probe assembly |
| 09/05/1996 | DE4445334C1 Lubricant used to lubricate pipes being propelled into ground |
| 09/05/1996 | DE19508703A1 Verfahren zum Einbringen eines Rohres in das Erdreich A method for introducing a tube into the soil |
| 09/05/1996 | DE19501438A1 Initiation- and steam melt-boring process combined from earlier rock melting developments |
| 09/05/1996 | DE19501437A1 Salt melt-drilling process to sink 2 m boreholes for highly active waste disposal |
| 09/04/1996 | EP0730082A2 Drill bit for percussive drilling |
| 09/04/1996 | EP0729555A1 Improved guided mole |
| 09/03/1996 | US5551521 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 09/03/1996 | US5551509 Mill lick out apparatus |
| 09/03/1996 | CA2101668C Self positioning dust seal holder |
| 09/03/1996 | CA2058789C Method of installing well conductors |
| 08/28/1996 | EP0728911A2 Directional drilling motor assembly |
| 08/28/1996 | EP0728910A2 Steerable rotary drilling system |
| 08/28/1996 | EP0728909A2 Steerable rotary drilling system |
| 08/28/1996 | EP0728908A2 Steerable rotary drilling system |
| 08/28/1996 | EP0728907A2 Steerable rotary drilling system |
| 08/28/1996 | EP0728050A1 Method and system of trajectory prediction and control using pdc bits |
| 08/27/1996 | US5549170 Method of removing material from a subsurface |
| 08/27/1996 | US5549163 Piston sleeve valve for use with oilfield fishing operations |
| 08/27/1996 | CA2067303C Whipstock |
| 08/25/1996 | CA2169614A1 Method and device for aligning a drill aggregate |
| 08/20/1996 | US5547314 Offshore system and method for storing and tripping a continuous length of jointed tubular conduit |
| 08/20/1996 | US5547032 Apparatus for drilling curved sections of well holes |
| 08/20/1996 | US5547031 Orientation control mechanism |
| 08/15/1996 | WO1996024753A1 Continuous control system for a mining or tunnelling machine |
| 08/14/1996 | EP0725865A1 Drilling apparatus |
| 08/14/1996 | EP0725757A1 Excavating equipment |
| 08/14/1996 | EP0592547B1 Pile driving machine |
| 08/14/1996 | EP0560867B1 Method for manufacturing a tubular foundation in the ground |
| 08/13/1996 | US5544977 Polymeric pipe splitter, replacement tool and method |
| 08/13/1996 | US5544704 For assisting directional drilling in a well bore |
| 08/08/1996 | WO1996023953A1 Multiple drain drilling and production apparatus |
| 08/08/1996 | CA2210852A1 Multiple drain drilling and production apparatus |
| 08/07/1996 | EP0725205A1 Devices and method to stop water inflow to an underground pipe laying work area |
| 08/07/1996 | CN2232481Y Walking tractor type multifunction drilling machine |
| 08/06/1996 | US5542784 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 08/06/1996 | US5542486 Method of and apparatus for single plenum jet cutting |
| 08/06/1996 | US5542483 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 08/06/1996 | US5542482 Articulated directional drilling motor assembly |
| 08/06/1996 | CA2104723C High pressure soil disintegrating and excavation system using suction to remove water and particles |
| 07/31/1996 | CN2232069Y Short drilling rig |
| 07/30/1996 | US5541517 Method for drilling a borehole from one cased borehole to another cased borehole |
| 07/30/1996 | US5540433 Pilot hole drill for golf tee |
| 07/30/1996 | US5540295 Vibrator for drill stems |
| 07/30/1996 | US5540294 Vertical percussion ground boring tool apparatus and method |
| 07/30/1996 | US5540292 Pneumatically actuated horizontal drilling apparatus having a plurality of drills |
| 07/25/1996 | DE19522579C1 Method of replacing underground pipes without excavating |
| 07/23/1996 | US5538092 Flexible drill pipe |
| 07/23/1996 | US5538091 Bottom hole assembly |
| 07/23/1996 | US5538090 Ground probe apparatus |
| 07/23/1996 | CA2029188C Adjustable angle pipe joint |
| 07/18/1996 | WO1996021793A1 Drilling and pipe laying unit |
| 07/18/1996 | WO1996009460A3 Apparatus for milling a well casing |
| 07/18/1996 | CA2208681A1 Drilling and pipe laying unit |
| 07/17/1996 | CN2231305Y Small four wheel tractor type drill rig |
| 07/17/1996 | CN1126791A Pulse-flow drilling tool |
| 07/16/1996 | US5535836 Total recovery drill |
| 07/16/1996 | US5535835 Straight/directional drilling device |
| 07/16/1996 | US5535834 Pumping liquid mixture containing alkyl or aryl metal sulfonate and solvent down drill stem with drilling mud to coat and lubricate drill and bore, also to flush cutting residues from bore |
| 07/16/1996 | US5535824 Well tool for completing a well |
| 07/16/1996 | US5535822 In an oil or gas well |
| 07/10/1996 | EP0720684A1 Method of and apparatus for horizontal well drilling |
| 07/09/1996 | US5533574 For use in drilling/producing a deepwater well |
| 07/09/1996 | US5533573 Method for completing multi-lateral wells and maintaining selective re-entry into laterals |
| 07/04/1996 | DE19527138C1 Underground pipe replacement device |
| 07/04/1996 | DE19500024A1 Microwave-superheated, steam plasma jet melt-boring of rock, consuming only electrical energy and water |
| 07/03/1996 | EP0719375A1 Negative pressure vortex nozzle |
| 07/02/1996 | US5531271 Wellbore tool side support |
| 06/27/1996 | WO1996019635A1 Steerable drilling with downhole motor |
| 06/26/1996 | EP0718641A2 Drilling system with downhole apparatus for transforming multiple downhole sensor measurements into parameters of interest and for causing the drilling direction to change in response thereto |
| 06/26/1996 | EP0718461A2 Method and apparatus for laying a conduit in a stop-type trench arrangement |
| 06/26/1996 | EP0717808A1 Apparatus for use in a wellbore |
| 06/26/1996 | EP0524183B1 A borehole, as well as a method and an apparatus for forming it |
| 06/26/1996 | EP0426788B1 High-pressure pipe string for continuous fusion drilling of deep wells, process and device for manufacturing, propelling and dismantling it |
| 06/26/1996 | CN2229968Y Hydraulic drilling equipment with arch shaped and openable drilling edge |
| 06/25/1996 | US5529133 Steerable drilling tool and system |
| 06/25/1996 | CA2074296C Bent sub |
| 06/20/1996 | WO1996018800A1 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 06/20/1996 | WO1996018798A1 A drilling method and bit assembly to realize the method |
| 06/20/1996 | WO1996018461A1 Method and apparatus for conditioning fluid flow |
| 06/20/1996 | DE19538037A1 Mechanism for renewing or producing pipes with borer for drilling old pipes or virgin soil |
| 06/18/1996 | US5527135 Method for injecting lubricant or back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method and an apparatus therefor |
| 06/18/1996 | US5526886 Ram boring device |
| 06/16/1996 | CA2165242A1 Continuously shoring an excavated hole |
| 06/12/1996 | EP0716190A1 Slotting mill |
| 06/12/1996 | EP0715679A1 Arrangement for mounting slides |
| 06/12/1996 | EP0551351B1 Method and equipment for aligning the feeding beam of a rock drilling equipment |
| 06/12/1996 | CN1124515A Curved drilling apparatus |
| 06/12/1996 | CN1124514A Drilling kick-off device |