| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 02/23/1999 | US5873419 Ice auger attachment |
| 02/18/1999 | WO1999007977A1 Drilling tool for down-the-hole drilling, reamer means and body element for use in the tool |
| 02/18/1999 | WO1999007975A1 Method and apparatus for drilling and completing wells |
| 02/18/1999 | CA2268256A1 Method and apparatus for drilling and completing wells |
| 02/17/1999 | CN2307902Y Horizontal directional drilling rig hydraulic station |
| 02/16/1999 | US5871046 For use in drilling a branch wellbore |
| 02/16/1999 | CA2060445C Downhole adjustable stabilizer |
| 02/11/1999 | DE19734068A1 Bore point for earth displacement borer |
| 02/09/1999 | US5868211 Ball and socket mounted hydraulic posthole digger and method for using the same |
| 02/09/1999 | US5868210 Method for recovering hydrocarbons from earth formations |
| 02/03/1999 | CN1206778A Method and apparatus for locating indexing systems in cased well and conducting multilateral branch operations |
| 02/02/1999 | USH1780 Soil sample core system |
| 02/02/1999 | US5865260 Method and apparatus for drilling multiple wells from a platform |
| 02/02/1999 | CA2002135C Directional drilling apparatus and method |
| 01/28/1999 | WO1999004135A1 Deformed multiple well template and process of use |
| 01/27/1999 | EP0893571A2 Device for steering a drill string |
| 01/27/1999 | EP0893570A1 Multiple head drilling unit for loose soil drill |
| 01/26/1999 | US5863101 Auger mining machine and mine launch device |
| 01/26/1999 | US5862871 Axial-vortex jet drilling system and method |
| 01/26/1999 | US5862859 Side pocket mandrel orienting device with integrally formed locating slot |
| 01/21/1999 | WO1999002815A1 Device and method for creating ramifications in a bore hole |
| 01/21/1999 | WO1999002814A1 Self-contained underground drill rig |
| 01/20/1999 | CN2304748Y Underground borer of high pressure jet well |
| 01/19/1999 | US5860482 Multiple force hole forming device |
| 01/19/1999 | US5860475 Mixed well steam drive drainage process |
| 01/19/1999 | US5860474 Method for recompleting a cased wellbore containing a casing |
| 01/19/1999 | CA2120366C Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 01/19/1999 | CA2104534C Retrievable whipstock |
| 01/14/1999 | DE19729315A1 Transmission tube for mobile rotary borehole drill |
| 01/14/1999 | DE19728905A1 Pipe union for sections of pilot tube driven by ram |
| 01/13/1999 | EP0890708A1 Method, system and device for building a wall in the ground |
| 01/13/1999 | EP0890707A1 Method, system and device for building a wall in the ground |
| 01/13/1999 | EP0890704A1 Wheel-mounted boring machine with hinged chassis |
| 01/12/1999 | US5857531 For connection to a drill string for drilling wells at build-up rates |
| 01/12/1999 | US5857530 Vertical positioning system for drilling boreholes |
| 01/07/1999 | WO1999000576A1 Downhole mud motor |
| 01/07/1999 | EP0888490A2 Mill for wellbore milling operations |
| 01/07/1999 | EP0888489A1 Hydrocarbon recovery method using inverted production wells |
| 01/07/1999 | CA2209873A1 Slope working machinery |
| 01/06/1999 | CN2303076Y Directional drilling column scale |
| 01/06/1999 | CN1204378A Fluid drilling system |
| 01/03/1999 | CA2242026A1 One-trip, thru-tubing, window-milling system |
| 12/30/1998 | WO1998059146A1 Earth formation surveying device |
| 12/30/1998 | EP0886720A1 Underwater installation and method for building of an underwater installation |
| 12/29/1998 | US5853056 Method of and apparatus for horizontal well drilling |
| 12/29/1998 | US5853053 Stabilization devices for drill motors |
| 12/29/1998 | CA2180929C Shale containment unit for a drilling rig |
| 12/24/1998 | DE19726613A1 Mobile drilling machine with step negotiating movement mechanism |
| 12/23/1998 | WO1998058152A1 Method and apparatus for drilling subsea wells |
| 12/23/1998 | WO1998058151A1 Apparatus for and a method of drilling a lateral borehole |
| 12/23/1998 | EP0886034A2 Drilling device |
| 12/23/1998 | EP0885343A1 Directional boring |
| 12/23/1998 | EP0885092A1 A device performing hammering by means of hydraulic pressure |
| 12/22/1998 | US5850884 Moling apparatus |
| 12/17/1998 | WO1998057034A1 Method of controlling rock drilling |
| 12/17/1998 | WO1998057031A1 System for drilling and completing multilateral wells |
| 12/17/1998 | DE19729809C1 Vorrichtung und Verfahren zum Herstellen von Bohrlochverzweigungen Apparatus and method for producing borehole branches |
| 12/17/1998 | CA2240770A1 Boring apparatus |
| 12/16/1998 | EP0884447A1 Slope working machinery |
| 12/16/1998 | EP0884446A2 Drilling apparatus |
| 12/16/1998 | EP0883729A1 Moling apparatus and a ground sensing system therefor |
| 12/16/1998 | EP0807203B1 Continuous control system for a mining or tunnelling machine |
| 12/16/1998 | CN2300284Y High elasticity inner ventilation health care shoes |
| 12/10/1998 | WO1998055727A1 An erectable arm assembly for use in boreholes |
| 12/09/1998 | EP0882871A2 Formation data sensing with deployed remote sensors during well drilling |
| 12/09/1998 | EP0882170A1 Axial-vortex jet drilling system and method |
| 12/09/1998 | EP0815342B1 Improved casing shoe |
| 12/09/1998 | CN1041123C Shielding apparatus |
| 12/08/1998 | US5845722 Method and apparatus for drilling boreholes in earth formations (drills in liner systems) |
| 12/08/1998 | US5845710 Methods of completing a subterranean well |
| 12/08/1998 | US5845707 Method of completing a subterranean well |
| 12/08/1998 | CA2151272C System for in situ replacement of cutting means for a ground drill |
| 12/03/1998 | WO1998054438A1 Bottomhole assembly orienting sub |
| 12/03/1998 | WO1998045568A3 Whipstock and installing and retrieving tools |
| 12/01/1998 | US5842528 Method of drilling and completing wells |
| 11/26/1998 | WO1998053175A1 Adjustable bend connection |
| 11/26/1998 | WO1998053174A1 Apparatus and method for drilling and lining a lateral wellbore |
| 11/26/1998 | DE19721383A1 Drilling tool blockage prevention system |
| 11/25/1998 | EP0879341A1 Down hole pressure intensifier and drilling assembly and method |
| 11/24/1998 | US5839525 For drilling subsurface formations |
| 11/24/1998 | US5839520 Method of decreasing the tortuosity of a high deviated well bore |
| 11/24/1998 | US5839519 Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment |
| 11/17/1998 | US5836407 Articulated tool for drilling oil, gas geothermal wells |
| 11/17/1998 | US5836406 In a borehole |
| 11/17/1998 | US5836402 Auger-holder |
| 11/17/1998 | US5836387 System for securing an item in a tubular channel in a wellbore |
| 11/17/1998 | US5836386 Wiping element for a drill pipe ID wiping device |
| 11/17/1998 | US5836089 Excavating equipment fitted with surface clamps |
| 11/12/1998 | WO1998050667A2 Directional drilling apparatus |
| 11/11/1998 | EP0876545A1 Method for forming a window in a tubular and apparatus for use in said method |
| 11/11/1998 | EP0763161B1 Method for setting a whipstock in a wellbore |
| 11/11/1998 | CN1198794A Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 11/11/1998 | CN1198502A Boring device and torque support for boring device |
| 11/10/1998 | US5833585 Method and apparatus for exercising muscles |
| 11/10/1998 | US5833399 In the ground |
| 11/10/1998 | US5833016 Method and apparatus for efficiently lifting and lowering stands of pipe |
| 11/10/1998 | US5833015 Method and apparatus for sinking pipes or cables into a pilot borehole |
| 11/10/1998 | US5833003 Apparatus for completing a subterranean well and associated methods of using same |
| 11/10/1998 | US5832997 Retrievable milling guide anchor apparatus and associated methods |
| 11/04/1998 | EP0874946A1 Arrangement for leading flexible elements to a rock drill, and a hose reel structure |