| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 07/27/1995 | WO1995020097A1 Method and apparatus for plasma blasting |
| 07/27/1995 | DE19501396A1 Offset drilling of straight, deviated or curved bores for gas or oil |
| 07/27/1995 | CA2140234A1 Scoophead running tool |
| 07/26/1995 | EP0664373A2 A tool and method of boring and filling the borehole with concrete without removing soil therefrom |
| 07/26/1995 | EP0664372A2 Orientable whipstock |
| 07/26/1995 | EP0664011A1 Vibrating hole forming device for seismic exploration |
| 07/26/1995 | CA2140214A1 Retrievable whipstock anchor assembly |
| 07/25/1995 | US5435400 Lateral well drilling |
| 07/25/1995 | US5435399 Soil sampler |
| 07/25/1995 | US5435176 Hazardous waste characterizer and remediation method and system |
| 07/25/1995 | US5435069 Method for determining borehole direction |
| 07/20/1995 | WO1995019490A1 Method of creating a borehole in an earth formation |
| 07/19/1995 | EP0663040A1 Method for forming a window in a subsurface well conduit |
| 07/13/1995 | WO1995018892A1 Improvements in or relating to apparatus for use in forming piles |
| 07/12/1995 | CN2203350Y Pressurization adjustable stabilizer |
| 07/11/1995 | US5431234 Ground-drilling device |
| 07/11/1995 | US5431223 Drilling kick-off device |
| 07/11/1995 | US5431220 Whipstock starter mill assembly |
| 07/11/1995 | US5431219 Forming casing window off whipstock set in cement plug |
| 07/06/1995 | WO1995018287A1 Control device for drilling a bore hole |
| 07/06/1995 | DE4402487A1 Drill for deep borehole |
| 07/05/1995 | EP0661459A1 Hydraulic pressure intensifier for drilling wells |
| 07/05/1995 | EP0661412A1 Device and method for remote actuation of a downhole tool |
| 07/05/1995 | CN2202795Y Big head anchor rod drill machine |
| 07/05/1995 | CN2202794Y Stepping rotary cutting underground hole maker |
| 07/04/1995 | US5429198 Down reaming apparatus having hydraulically controlled stabilizer |
| 07/04/1995 | US5429187 Milling tool and operations |
| 07/04/1995 | US5429036 Remote hydraulic pressure intensifier |
| 07/04/1995 | CA1336187C Directional drilling assembly |
| 06/29/1995 | WO1995017580A1 Assembly and process for drilling and completing multiple wells |
| 06/29/1995 | WO1995017576A1 Dual concentric string high pressure riser |
| 06/28/1995 | EP0659230A1 Whipstock assembly. |
| 06/27/1995 | US5427475 Trenchless pipeline installation method and apparatus employing corrective alignment of pilot hole |
| 06/27/1995 | US5427190 Underground borer with down hammer |
| 06/27/1995 | US5427179 For changing direction of drilling within a wellbore |
| 06/27/1995 | US5427177 Multi-lateral selective re-entry tool |
| 06/25/1995 | CA2139007A1 Device and method for remotely actuating an equipment - application to a boring string |
| 06/22/1995 | CA2559391A1 Downhole tool |
| 06/21/1995 | CN2201480Y Round pile drill with automatic horizontally picking core |
| 06/20/1995 | US5425570 Method and apparatus for plasma blasting |
| 06/20/1995 | US5425429 Method and apparatus for forming lateral boreholes |
| 06/20/1995 | US5425419 Whipstock apparatus and methods of use |
| 06/20/1995 | US5425417 Wellbore tool setting system |
| 06/18/1995 | CA2137888A1 Directional drilling method and apparatus |
| 06/15/1995 | WO1995016079A1 Multi-shaft excavating device |
| 06/14/1995 | EP0657616A1 Auger device for piles foundations |
| 06/14/1995 | EP0657006A1 Guided mole |
| 06/14/1995 | CN2200692Y Underreamer device |
| 06/13/1995 | US5423636 Cement soil apparatus of underground borer |
| 06/13/1995 | US5423389 Curved drilling apparatus |
| 06/13/1995 | US5423388 Direction controllable subsurface borehole tool |
| 06/13/1995 | US5423387 Method for sidetracking below reduced-diameter tubulars |
| 06/08/1995 | WO1995015419A1 Ground boring device and method for constructing an underground wall using the same |
| 06/06/1995 | US5421421 Apparatus for directional drilling |
| 06/06/1995 | US5421420 Downhole weight-on-bit control for directional drilling |
| 06/01/1995 | WO1995014878A1 Improved guided mole |
| 06/01/1995 | DE4344517C1 System for drawing pipes into ground under roads and train tracks |
| 06/01/1995 | CA2176121A1 Improved guided mole |
| 05/31/1995 | CN2199304Y Diving-type rolling rubbing circular pile drill |
| 05/30/1995 | US5419405 System for controlled drilling of boreholes along planned profile |
| 05/30/1995 | CA2058566C Harness method and apparatus |
| 05/26/1995 | WO1995014153A1 Bottom set, non-retrievable whipstock assembly |
| 05/24/1995 | DE4403267C1 System for underground laying of coupling pipes |
| 05/24/1995 | CN1102867A Impact rotating extrusion sealing drill bit and drilling method |
| 05/23/1995 | US5417290 Sonic drilling method and apparatus |
| 05/18/1995 | WO1995013152A1 Method and system of trajectory prediction and control using pdc bits |
| 05/17/1995 | EP0653548A2 Method of cutting a structural substrate with liquid-borne abrasives |
| 05/17/1995 | CN2197453Y Stabilizer for blade drilling bit |
| 05/13/1995 | CA2135565A1 Method of cutting high strength materials with water soluble abrasives |
| 05/11/1995 | WO1995012747A1 Method and system for exploring for and extraction of raw materials, minerals or the like in soft ground |
| 05/11/1995 | CA2175705A1 Method and system for exploring for and extraction of raw materials, minerals or the like in soft ground |
| 05/09/1995 | US5413184 Method of and apparatus for horizontal well drilling |
| 05/09/1995 | CA2029733C Reamer |
| 05/04/1995 | WO1995012050A1 Ground displacement auger head for making piles in the ground |
| 05/04/1995 | WO1995012040A1 Drilling apparatus |
| 05/04/1995 | WO1995007404A3 Apparatus for use in a wellbore |
| 05/04/1995 | CA2175361A1 Drilling apparatus |
| 05/04/1995 | CA2174119A1 Ground displacement auger head for making piles in the ground |
| 05/02/1995 | US5411104 Coalbed methane drilling |
| 05/02/1995 | US5411082 Scoophead running tool |
| 05/02/1995 | CA1335448C Flexible drill string member especially for use in directional drilling |
| 04/27/1995 | WO1995011349A1 Multi-shaft excavating device |
| 04/25/1995 | US5410303 System for drilling deivated boreholes |
| 04/25/1995 | US5409070 Coupling for rotary-vibratory drills |
| 04/25/1995 | US5409060 Wellbore tool orientation |
| 04/20/1995 | WO1995010684A1 Negative pressure vortex nozzle |
| 04/20/1995 | WO1995010683A1 Down reaming apparatus |
| 04/20/1995 | CA2173870A1 Down reaming apparatus |
| 04/20/1995 | CA2173733A1 Negative pressure vortex nozzle |
| 04/18/1995 | CA1335283C Method and apparatus for producing pressure variations in a drilling fluid |
| 04/13/1995 | WO1995009963A1 Method of and apparatus for horizontal well drilling |
| 04/13/1995 | CA2172498A1 Method of and apparatus for horizontal well drilling |
| 04/11/1995 | CA1335214C Method of predicting the torque and drag in directional wells |
| 04/11/1995 | CA1335198C Well reamer |
| 04/06/1995 | WO1995009291A1 Method and apparatus for setting a whipstock |
| 04/06/1995 | DE4335290A1 Method of sealing soil bodies and arrangement for carrying out this method |
| 04/05/1995 | EP0646693A2 Bottom hole assembly for directional drilling |
| 04/05/1995 | EP0646213A1 Process and tool for laying underground collector mains for liquids and gases |
| 04/05/1995 | CN2193919Y Heavy-calibre foundation pile drilling machine |
| 04/05/1995 | CN1101096A Drilling short radius curvature well bores |