| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 05/26/1993 | CN2134479Y Joining spiral stabled apparatus for drilling tool |
| 05/26/1993 | CN1072471A Suspension well drilling technology |
| 05/25/1993 | US5213169 Exploration-sampling drilling system |
| 05/25/1993 | US5213168 Apparatus for drilling a curved subterranean borehole |
| 05/25/1993 | US5212891 Soft excavator |
| 05/25/1993 | CA1318313C Device for boring holes in the ground |
| 05/19/1993 | EP0541804A1 System for supporting drive of excavating type underground digging machine |
| 05/19/1993 | CA2080989A1 Hole digger |
| 05/18/1993 | US5211715 Coring with tubing run tools from a producing well |
| 05/18/1993 | US5211510 Propulsion method of pipe to be buried without soil discharge and an excavator |
| 05/18/1993 | US5211249 Apparatus and method for obtaining subterranean samples |
| 05/18/1993 | CA1317929C Tool for optional straight hole drilling in underground rock formations |
| 05/13/1993 | DE4134912A1 Impact tool for pipe jacking through ground - consists of driving tube with cutting head housing piston, which activates chisel headed striker |
| 05/11/1993 | US5209311 Drill string component |
| 05/11/1993 | US5209129 Subsurface sampler |
| 05/11/1993 | CA1317604C Device for evacuating excavated material for making deep tranches |
| 05/07/1993 | WO1993009329A1 Drilling unit |
| 05/07/1993 | WO1993009305A1 Method for the replacement of, in particular, sewage pipes, and a device for carrying out the method |
| 05/07/1993 | CA2098918A1 Method for the replacement of, in particular, sewage pipes, and a device for carrying out the method |
| 05/05/1993 | CN2131975Y Inclination determinating device for movable drilling rig |
| 05/04/1993 | US5207534 Method for conducting offshore well operations |
| 05/04/1993 | US5207533 Process and device for replacing an underground pipe |
| 05/04/1993 | US5207280 Device in hammer machines |
| 05/04/1993 | CA1317279C Apparatus for and a method of drilling offset wells for producing hydrocarbons |
| 04/29/1993 | WO1993008365A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream |
| 04/29/1993 | DE4235936A1 Underground pipes jacking mechanism - has drive set with axial piston hydraulic motor with rams on drive head tubular housing |
| 04/29/1993 | CA2121232A1 Pulsation nozzle, for self-excited oscillation of a drilling fluid jet stream |
| 04/28/1993 | EP0368887B1 Selectively phased water supply of a cutter head |
| 04/27/1993 | US5205671 Trenchless pipeline replacement |
| 04/27/1993 | US5205366 Superposed drilling device |
| 04/27/1993 | US5205365 Pressure assisted running of tubulars |
| 04/27/1993 | US5205364 Process and drilling equipment for sinking a well in underground rock formations |
| 04/21/1993 | EP0537624A1 Reaming tool |
| 04/20/1993 | US5203418 Apparatus for guiding and steering earth boring casing |
| 04/15/1993 | WO1993007453A1 Mobile inductively coupled plasma system |
| 04/15/1993 | DE4136059C1 Retrievable jacking tube with variable dia. - has profiled stiffening rings for elastically deformable tube jacket |
| 04/13/1993 | US5201816 Side angle drilling apparatus |
| 04/13/1993 | US5201375 Downhole drilling tool system |
| 04/13/1993 | CA1316168C Drill string element |
| 04/10/1993 | WO1993007355A1 Well tool and method of use |
| 04/06/1993 | US5199821 Method for conducting offshore well operations |
| 04/06/1993 | US5199515 Dry pneumatic system for hard rock shaft drilling |
| 04/06/1993 | US5199512 Method of an apparatus for jet cutting |
| 04/06/1993 | US5199511 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 04/06/1993 | US5199510 Raise boring head and stem assembly method |
| 04/01/1993 | WO1993006331A1 Well drilling pressure control method and apparatus |
| 04/01/1993 | WO1993006311A1 Excavating apparatus |
| 03/31/1993 | EP0534919A1 Rock drilling device |
| 03/31/1993 | EP0534338A2 Control system for a tunnel boring machine |
| 03/31/1993 | EP0533758A1 Drill steering apparatus |
| 03/31/1993 | EP0533716A1 Apparatus for feeding a drilling machine in extension rod drilling. |
| 03/31/1993 | CN2128968Y Drilling equipment |
| 03/30/1993 | US5197828 Method of forming modified ground |
| 03/30/1993 | US5197783 Extendable/erectable arm assembly and method of borehole mining |
| 03/30/1993 | US5197553 Drilling with casing and retrievable drill bit |
| 03/30/1993 | CA1315273C Method for boring hole in the ground and apparatus therefor |
| 03/30/1993 | CA1315272C Drilling apparatus |
| 03/24/1993 | EP0533559A1 Pincer grab excavator |
| 03/24/1993 | EP0532869A1 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 03/24/1993 | CN2128666Y Radial level drilling whipstock |
| 03/23/1993 | US5195848 Method and system for developing offshore hydrocarbon reserves |
| 03/23/1993 | US5195591 Permanent whipstock and placement method |
| 03/17/1993 | EP0531446A1 Downhole fluid motor composite torque shaft. |
| 03/17/1993 | EP0531336A1 Double-tube core drill for inclined drilling. |
| 03/17/1993 | CA2073995A1 Drill bit and method for reducing formation fluid invasion and for improved drilling in plastic formations |
| 03/16/1993 | US5193628 Method and apparatus for determining path orientation of a passageway |
| 03/16/1993 | US5193626 Drilling device |
| 03/16/1993 | US5193620 Whipstock setting method and apparatus |
| 03/09/1993 | US5192165 Trenchless replacement of conduits in an underground conduit bank |
| 03/03/1993 | EP0530045A1 Modulated bias units for steerable rotary drilling systems |
| 03/03/1993 | EP0528801A1 Pipe bursting and replacement apparatus and method |
| 03/03/1993 | CN2127739Y Adjustable joint for directional drilling |
| 03/03/1993 | CN2127738Y Double stabilizing device for integral drilling tools |
| 03/02/1993 | US5190411 Tension leg well jacket |
| 03/02/1993 | US5190353 Rock cutting tool having eccentric drive |
| 03/02/1993 | US5190114 Flow pulsing apparatus for drill string |
| 03/02/1993 | US5190113 Reamer |
| 02/24/1993 | EP0527924A1 Underground fluid sampling system |
| 02/23/1993 | US5188190 Method for obtaining cores from a producing well |
| 02/18/1993 | WO1993003252A1 Whipstock setting method and apparatus |
| 02/18/1993 | WO1992019837A3 Earth borer |
| 02/18/1993 | DE4127311A1 Hydraulic press station for driving tubular casings to tap water supplies - is located in shaft and comprises press ring and draw bars together with thrust plates |
| 02/17/1993 | EP0527460A2 Method and device for drilling holes in soil or rock, particularly for the insertion of injection anchors |
| 02/17/1993 | CN1069050A Potassic drilling mud |
| 02/16/1993 | US5186579 Apparatus for controlling direction of underground excavator |
| 02/16/1993 | US5186265 Retrievable bit and eccentric reamer assembly |
| 02/16/1993 | US5186264 Device for guiding a drilling tool into a well and for exerting thereon a hydraulic force |
| 02/16/1993 | US5186263 Soil sample probe |
| 02/09/1993 | US5184919 Method for widening a hole or a pipe in the ground |
| 02/09/1993 | US5184918 Recoverable tunnelling machine |
| 02/09/1993 | US5184687 Well reamer |
| 02/09/1993 | US5184686 Method for offshore drilling utilizing a two-riser system |
| 02/09/1993 | CA1313523C Feed beam arrangement for a rockdrill |
| 02/04/1993 | DE4208722A1 Bohr/schneidvorrichtung fuer beton oder dergleichen Drilling / cutting device for concrete or the like |
| 02/03/1993 | EP0525991A1 Sidewall coring tool |
| 02/03/1993 | EP0525186A1 Rock bed excavator |
| 02/03/1993 | CN1068625A Inner grooving tool for gravity type big diameter hole |
| 02/02/1993 | US5183111 Extended reach penetrating tool and method of forming a radial hole in a well casing |
| 01/27/1993 | EP0524183A1 A borehole, as well as a method and an apparatus for forming it. |
| 01/27/1993 | EP0420961B1 Recoverable sleeve assembly for pipe joint |