| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 06/23/1992 | CA1303972C Limited entry, multiple fracturing from deviated wellbores |
| 06/17/1992 | EP0490390A1 Propulsion method of pipe to be buried without soil discharge and an excavator |
| 06/17/1992 | EP0489816A1 Well casing flotation device and method |
| 06/17/1992 | EP0329678B1 Method and device for replacing damaged pipes buried in the ground |
| 06/17/1992 | DE4040805A1 Pump extracting ground water - has pressure sensor near water inlet linked to control mechanism |
| 06/13/1992 | CA2032022A1 Down hole drilling tool control mechanism |
| 06/11/1992 | WO1992009787A1 A method for aligning a feeding beam in a rock drilling equipment and a rock drilling equipment and a measuring device |
| 06/11/1992 | WO1992009783A2 Apparatus for directional drilling |
| 06/11/1992 | CA2096849A1 Apparatus for directional drilling |
| 06/09/1992 | US5119889 Tunneling drill bit |
| 06/06/1992 | CA2031607A1 Method of sealing a pressure drop across a drill bit in rotary applications |
| 06/02/1992 | US5117927 Downhole adjustable bent assemblies |
| 06/02/1992 | US5117920 Pole driver |
| 06/02/1992 | US5117915 Well casing flotation device and method |
| 05/29/1992 | WO1992008872A1 Converter group and pressure converter for use therein |
| 05/29/1992 | WO1992008871A1 Pressure converter |
| 05/29/1992 | CA2096434A1 Pressure converter |
| 05/29/1992 | CA2096433A1 Converter group and pressure converter for use therein |
| 05/27/1992 | EP0486752A1 Directional drill string comprising a pipe with a shaft bearing |
| 05/27/1992 | EP0486751A1 Directional drill string with an integrated electrical generator |
| 05/27/1992 | EP0486750A2 Target-directed drilling rod |
| 05/26/1992 | US5116354 Recoverable sleeve assembly for pipe joint |
| 05/26/1992 | US5116164 Device to load reinforcement rods |
| 05/26/1992 | US5115872 Directional drilling system and method for drilling precise offset wellbores from a main wellbore |
| 05/26/1992 | CA1301635C Method of well construction |
| 05/21/1992 | DE4036193A1 Eccentric drive for rolling and milling drilling tool - has separate drive for fast-running eccentric and slow-running casing with adjustable counterweight in tool casing |
| 05/20/1992 | EP0486449A1 Drill string component |
| 05/19/1992 | US5113953 Directional drilling apparatus and method |
| 05/19/1992 | US5113938 Whipstock |
| 05/19/1992 | CA1301147C Apparatus for controlling the operation of a downhole tool |
| 05/19/1992 | CA1300876C Tractor-controlled hammer assembly |
| 05/13/1992 | EP0485052A1 Boring head and method for directional drilling in the ground |
| 05/13/1992 | EP0484839A2 Reversible impact-operated boring tool |
| 05/13/1992 | CN2104284U Contant pressure drilling device under well |
| 05/13/1992 | CN1016586B Insitu hazardous waste treating apparatus and method of using same |
| 05/12/1992 | US5112158 Underground pipe replacement method and apparatus |
| 05/12/1992 | US5111893 Device for drilling in and/or lining holes in earth |
| 05/12/1992 | US5111891 Boring head for a subsurface soil-boring apparatus |
| 05/12/1992 | US5111801 Apparatus for forming slit in rock and concrete surface |
| 05/12/1992 | CA1300591C Roller type orbiting mass oscillator with low fluid drag |
| 05/09/1992 | CA2046417A1 Boring head for a subsurface soil-boring apparatus |
| 05/05/1992 | US5109934 Mobile drilling rig for closely spaced well centers |
| 05/05/1992 | US5109932 Impact borer, connector for embedding lines, anchoring cables, and sinking wells |
| 05/05/1992 | US5109924 One trip window cutting tool method and apparatus |
| 04/30/1992 | DE3825849A1 Stepwise deep burning by constructing underground vaults - for further coaxial drilling enables increase of max. boring depth for mineral and other exploitation |
| 04/28/1992 | US5107940 Top drive torque restraint system |
| 04/28/1992 | US5107939 Electrically conducting an orientation signal in a directionally drilled well |
| 04/28/1992 | US5107936 Rock melting excavation process |
| 04/28/1992 | US5107933 Hydraulic drilling outfit |
| 04/28/1992 | CA2013658C Process for replacing a length of buried pipe |
| 04/23/1992 | DE4122503A1 earth penetrating body - using explosive gas mixt. for laying cables |
| 04/22/1992 | EP0481545A1 Drill head |
| 04/22/1992 | EP0481079A1 Method and tool for producing a pile |
| 04/21/1992 | US5106164 Plasma blasting method |
| 04/21/1992 | US5105890 Apparatus for altering the length of a downhole tool assembly |
| 04/16/1992 | WO1992006279A1 Method and equipment for aligning the feeding beam of a rock drilling equipment |
| 04/16/1992 | WO1992006276A1 Method of drilling holes in rock |
| 04/15/1992 | EP0479927A1 Drill string component. |
| 04/15/1992 | CN2101739U Casing driving apparatus for petroleum drilling borehole |
| 04/15/1992 | CN1060330A Hydraulic underground propulsion |
| 04/14/1992 | US5104263 Underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 04/14/1992 | US5103921 Coring assembly for mounting on the end of a drill string |
| 04/14/1992 | US5103920 Surveying system and method for locating target subterranean bodies |
| 04/14/1992 | US5103919 Method of determining the rotational orientation of a downhole tool |
| 04/09/1992 | DE4031688A1 Mobile drill for hollow auger drilling - consists of drill rig mounted on back of commercial vehicle and has swinging mast |
| 04/08/1992 | EP0478798A1 System for controlling direction of underground excavator |
| 04/08/1992 | CN1016206B Method for boring hole in gound and apparatus therefor |
| 04/08/1992 | CN1016205B Drill |
| 04/08/1992 | CN1016201B Well reamer |
| 04/07/1992 | US5101915 Adjustable angle pipe joint |
| 04/07/1992 | US5101914 Orientatable adjustable bent housing |
| 04/07/1992 | US5101912 Steerable ground drilling devices |
| 03/31/1992 | US5099931 Method and apparatus for optional straight hole drilling or directional drilling in earth formations |
| 03/31/1992 | US5099929 Unbalanced PDC drill bit with right hand walk tendencies, and method of drilling right hand bore holes |
| 03/31/1992 | US5099927 Apparatus for guiding and steering earth boring casing |
| 03/31/1992 | CA1298089C Pipe propelling apparatus |
| 03/24/1992 | US5098225 Cutting/expanding tool |
| 03/24/1992 | US5098219 Mobile submersible caisson for underwater oil-well drilling and production |
| 03/24/1992 | US5098163 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 03/24/1992 | CA1297782C Gravel packing system for a production radial tube |
| 03/20/1992 | CA2051724A1 Whipstock assembly with hydraulically set anchor |
| 03/19/1992 | WO1992004524A1 Method and device for digging a tunnel in consolidatable sub-soil |
| 03/19/1992 | WO1992004523A1 Drilling machine table |
| 03/19/1992 | CA2025653A1 Orientatable adjustable bent housing |
| 03/17/1992 | US5096003 Method and apparatus for subsoil drilling |
| 03/17/1992 | US5096002 Method and apparatus for enlarging an underground path |
| 03/17/1992 | US5096000 Process and apparatus for laying service lines without excavation |
| 03/17/1992 | US5095998 For excavation of earth channels |
| 03/12/1992 | DE4028596A1 Equipment for sinking shafts - uses widening tool fixed to supporting and guiding tube which is inserted in pilot hole |
| 03/12/1992 | DE4028265A1 Verfahren und vorrichtung zur kontinuierlichen erstellung von tunnel in alluvialen untergruenden nach dem verdraengungsprinzip Method and apparatus for the continuous creation of tunnel in alluvial untergruenden after verdraengungsprinzip |
| 03/11/1992 | CN1015818B Pipe burster |
| 03/11/1992 | CN1015813B Shield type tunnel machine |
| 03/11/1992 | CN1015808B Method for well drilling |
| 03/10/1992 | US5094568 Offshore support structure method and apparatus |
| 03/10/1992 | US5094305 Orientatable adjustable bent sub |
| 03/10/1992 | US5094304 Double bend positive positioning directional drilling system |
| 03/10/1992 | US5094302 Drilling rig |
| 03/10/1992 | CA1297093C Finned impact operated boring tool |
| 03/05/1992 | WO1992004528A1 Method and apparatus for jet cutting |
| 03/05/1992 | DE4128287A1 Sinking borehole with drill string contg. motor for rotary bit - includes equipment for data measurement and transmitting data to surface |