| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/20/1997 | CA2205053A1 Drilling process and device |
| 03/20/1997 | CA2205004A1 Window-cutting system for downhole tubulars |
| 03/19/1997 | EP0763648A1 Drilling apparatus and drilling method |
| 03/19/1997 | EP0763647A2 Steerable drilling tool and system |
| 03/19/1997 | EP0763161A1 Method for setting a whipstock in a wellbore |
| 03/19/1997 | CN1145446A Compliance-based torque and drag monitoring system and method |
| 03/19/1997 | CN1145444A Method and system of trajectory prediction and control using PDC bits |
| 03/19/1997 | CN1145443A Hydraulic well incline controlling, damping propeller |
| 03/19/1997 | CN1145435A Slurry wall-protecting boring-grouting pile series, its construction and equipment |
| 03/18/1997 | US5612498 Ground water sampling device |
| 03/13/1997 | WO1997009508A1 Method and apparatus for drilling multiple wells from a low load platform |
| 03/12/1997 | EP0761323A1 Method of decontaminating polluted soils and drill head for carrying out the method |
| 03/12/1997 | EP0760895A1 Lateral drilling method |
| 03/12/1997 | CN2249307Y Boring device with flexible driving mechanism |
| 03/12/1997 | CN1144875A Right-angle steering horizontal drilling system |
| 03/06/1997 | WO1997008419A1 Multi-linked working boom for working machine |
| 03/06/1997 | WO1997008396A1 Device for widening a borehole in the ground |
| 03/05/1997 | EP0760419A2 Method for surveying planned tunnel galleries |
| 03/05/1997 | EP0760049A1 Whipstock and method for setting such a whipstock |
| 03/05/1997 | EP0542876B1 Controlled fracture method and apparatus for breaking hard compact rock and concrete materials |
| 03/05/1997 | CN1144549A Apparatus for drilling open tunnel and drilling method |
| 03/04/1997 | US5608162 Method and system of trajectory prediction and control using PDC bits |
| 03/04/1997 | US5607257 Drilling apparatus |
| 02/27/1997 | WO1997007318A1 Through-tubing lateral re-entry |
| 02/27/1997 | WO1997007316A1 Scraper for removing an earth core from a pipe laid without excavation |
| 02/26/1997 | EP0759498A2 Arrangement of an impact sensitive apparatus in a housing |
| 02/26/1997 | EP0759117A1 Device for driving a tunnel or drain pipe |
| 02/26/1997 | EP0759115A1 Device for controlling the drilling direction of drill bit |
| 02/20/1997 | WO1997006348A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | WO1997006337A1 Drilling method and casing shoe |
| 02/20/1997 | WO1997006336A1 Down hole pressure intensifier and drilling assembly and method |
| 02/20/1997 | WO1996033335A3 Displaceable working apparatus with extensible boom |
| 02/20/1997 | CA2235676A1 Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 02/20/1997 | CA2228477A1 Down hole pressure intensifier and drilling assembly and method |
| 02/18/1997 | US5603386 Downhole tool for controlling the drilling course of a borehole |
| 02/18/1997 | US5603385 Rotatable pressure seal |
| 02/13/1997 | WO1997005360A1 Apparatus and process for drilling and completing multiple wells |
| 02/13/1997 | WO1997004926A1 A device performing hammering by means of hydraulic pressure |
| 02/12/1997 | EP0659230B1 Whipstock assembly |
| 02/11/1997 | US5602541 System for drilling deviated boreholes |
| 02/11/1997 | US5601152 Vibrator core drilling apparatus |
| 02/11/1997 | US5601151 Drilling tool |
| 02/11/1997 | US5601148 Arrangement for measuring the position of a feed beam in a rock drilling apparatus and/or measuring the position of a rock drill |
| 02/06/1997 | WO1997004263A1 Method for replacing buried pipe |
| 02/06/1997 | WO1997004213A1 Hazardous waste characterizer and remediation method and system |
| 02/06/1997 | WO1997004208A1 Branch boreholes |
| 02/06/1997 | WO1997004182A1 Method of expanding a bore hole in ground containing hard material and a device for implementing the method |
| 02/05/1997 | EP0757155A1 Earth drilling device |
| 02/05/1997 | EP0756666A1 Moling apparatus |
| 02/05/1997 | EP0353309B1 Method of constructing a well |
| 02/05/1997 | CA2182729A1 Ground drilling apparatus |
| 02/04/1997 | US5598893 System and method for setting up ski course gates |
| 01/30/1997 | WO1997003274A1 Single trip whipstock assembly |
| 01/29/1997 | EP0567460A4 Well tool and method of use |
| 01/28/1997 | US5597505 Hole form apparatus |
| 01/28/1997 | US5597046 Guided mole |
| 01/28/1997 | US5597045 Process and tool for laying underground collector mains for liquids and gases |
| 01/23/1997 | WO1997002402A1 Device for drilling holes and/or slits |
| 01/23/1997 | DE19625073A1 Digging=free system for laying underground drain seepage pipes |
| 01/22/1997 | EP0541773B1 Method and apparatus for determining path orientation of a passageway |
| 01/21/1997 | US5595254 Tilting bit crown for earth-boring drills |
| 01/21/1997 | US5595247 Retrievable through tubing tool and method |
| 01/21/1997 | CA2111881C Cutting/expanding tool |
| 01/15/1997 | EP0753095A1 Casing tube with casing shoe |
| 01/15/1997 | EP0711390A4 Underground pipe replacement technique |
| 01/15/1997 | EP0695390B1 Drilling kick-off device |
| 01/14/1997 | US5592993 Directional auger attachment |
| 01/14/1997 | US5592991 Method and apparatus of installing a whipstock |
| 01/09/1997 | WO1997001019A1 Arrangement for a telescope feeder of a rock-drilling machine |
| 01/08/1997 | EP0752046A1 Stabilisation devices for drill motors |
| 01/08/1997 | EP0690942B1 Process for sealing off ground sites and device for carrying out this process |
| 01/07/1997 | US5590726 Drilling apparatus |
| 01/07/1997 | US5590724 Underreaming method |
| 01/07/1997 | CA2091448C Well orienting tool and method of use |
| 01/03/1997 | WO1997000371A1 Down hole hammer assembly |
| 01/03/1997 | CA2224656A1 Down hole hammer assembly |
| 01/02/1997 | EP0750716A1 Milling tool |
| 01/02/1997 | EP0551299B1 Method of drilling holes in rock |
| 12/27/1996 | EP0750096A1 A method for injecting back-filling material into a space between the outside of double-wall pipes and the ground in the pipe-jacking method |
| 12/25/1996 | CN1138887A Method of creating a borehole in an earth formation |
| 12/25/1996 | CN1138660A Blasthole drill with improved automatic breakout wrench |
| 12/24/1996 | US5587540 Soil sampling device with latch assembly having a variable circumferential shape |
| 12/24/1996 | US5586840 Apparatus for digging soil foundation and method for constructing underground wall by using the apparatus |
| 12/24/1996 | US5586743 Auger stand |
| 12/24/1996 | US5586609 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 12/18/1996 | EP0748971A2 Method and device for removing, without excavation, lead and plastic pipes laid in the ground |
| 12/18/1996 | EP0521157B1 Propelling system in small diameter pipe propeller |
| 12/18/1996 | CN1138124A Vibration exciter machine |
| 12/17/1996 | US5585726 Electronic guidance system and method for locating a discrete in-ground boring device |
| 12/17/1996 | US5584351 Drilling machine and method of horizontal boring |
| 12/17/1996 | US5584350 Wellbore sidetracking methods |
| 12/12/1996 | WO1996039567A1 Method and apparatus for blasting hard rock |
| 12/11/1996 | EP0747161A1 Plasma cutting method and apparatus for concrete structures |
| 12/11/1996 | EP0746668A1 Arrangement and method for controlling boom actuating cylinders in rock drilling equipment |
| 12/11/1996 | EP0746665A1 An apparatus for drilling open a tunnel and drilling method |
| 12/11/1996 | EP0746664A1 Whipstock apparatus and methods of use |
| 12/10/1996 | US5582467 Displaceable working apparatus with extensible boom |
| 12/10/1996 | US5582259 Modulated bias unit for rotary drilling |
| 12/05/1996 | WO1996038648A1 Method and apparatus of installing a whipstock |
| 12/05/1996 | CA2195522A1 Method and apparatus of installing a whipstock |