| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 02/06/2001 | US6182773 Blasthole drill having a drill pipe seal assembly |
| 02/06/2001 | US6182760 Supplementary borehole drilling |
| 02/06/2001 | CA2226979C Method for replacing buried pipe |
| 02/01/2001 | WO2001007822A1 Cutting head |
| 02/01/2001 | WO2001007749A1 Lockable motor assembly for use in a well bore |
| 01/31/2001 | EP1072754A2 Ground removing device |
| 01/31/2001 | EP1071864A1 A system and method for locating a tool in a wellbore, a tubular and a device for the system |
| 01/30/2001 | US6179068 Directional drilling apparatus |
| 01/30/2001 | US6179057 Apparatus and method for killing or suppressing a subsea well |
| 01/30/2001 | CA2047282C Attitude control device and drilling-direction control device |
| 01/25/2001 | WO2001006085A1 Improved sonde housing structure |
| 01/25/2001 | CA2343382A1 Improved sonde housing structure |
| 01/24/2001 | EP1070194A1 A mill and a method for milling |
| 01/24/2001 | EP0956424B1 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom |
| 01/24/2001 | CN1061122C Bit segments for ground drill bit |
| 01/23/2001 | US6176325 Moling apparatus and a ground sensing system therefor |
| 01/23/2001 | CA2123298C Trenchless pipeline replacement |
| 01/18/2001 | WO2001004453A1 Steerable rotary drilling device and directional drilling method |
| 01/18/2001 | DE19932620A1 Method for harmonic rotating boring of spaces; involves making a virtual regime of the movement path of the technological parameter of the borer, with symmetrical harmonic spirals |
| 01/18/2001 | DE10029476A1 Horizontal, subterranean, trenchless drilling head unit |
| 01/18/2001 | DE10028015A1 Adding a liner to a borehole by inserting liner on a mandrel, injecting liquid between the liner and the borehole and expanding the liner onto the wall |
| 01/18/2001 | CA2615908A1 Expansion cone for radially expanding a tubular member |
| 01/18/2001 | CA2615015A1 Expansion cone for radially expanding a tubular member |
| 01/17/2001 | EP1068425A1 Drillstring with stabilisers for re-entering a primary wellbore |
| 01/17/2001 | CN1280646A Directional drilling tool |
| 01/16/2001 | US6173797 Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability |
| 01/16/2001 | US6173794 Downhole mud motor transmission |
| 01/12/2001 | CA2410722A1 Focal bearing assembly and bearing pre-load assembly for a steerable rotary drilling device |
| 01/12/2001 | CA2410716A1 Pressure compensation system for a steerable rotary drilling device |
| 01/11/2001 | WO2001002696A1 Coupling device for a rock drill |
| 01/11/2001 | WO2001002692A1 Jet excavating device |
| 01/11/2001 | WO2001002691A1 Rock drill and mounting frame |
| 01/11/2001 | DE19929893A1 Pipe and cable laying method comprises feeding breaking head though existing pipe and breaking it up, widening resulting bore and feeding in new pipe and parallel cables |
| 01/11/2001 | DE19925730C1 Pressure drill rod for pressure drilling plant uses hollow drill rod elements for providing light path between target light at drill head and camera at drilling drive end enclosed by fluid channel supplying fluid jets |
| 01/11/2001 | CA2377837A1 Coupling device for a rock drill |
| 01/10/2001 | EP1067272A1 Apparatus for forcing pipes in the underground |
| 01/09/2001 | US6171026 Method and apparatus for replacement of pipelines |
| 01/09/2001 | US6170571 Apparatus for establishing branch wells at a node of a parent well |
| 01/04/2001 | WO2001000961A1 An underreamer and a method of using the underreamer |
| 01/04/2001 | WO2001000960A1 Device by tool adapted to change the drilling direction while drilling |
| 01/04/2001 | WO2000053887A3 Wellbore primary barrier and related systems |
| 01/04/2001 | WO2000031376A3 Method and system for accessing subterranean deposits from the surface |
| 01/03/2001 | EP1064450A1 Riser tensioning construction |
| 01/03/2001 | CN1060244C Curved drilling apparatus |
| 01/02/2001 | US6167968 Method and apparatus for radially drilling through well casing and formation |
| 01/02/2001 | US6167961 Small diameter run in whipstock and method for setting in large diameter casing |
| 12/28/2000 | WO2000079091A1 Piloted drill barrel and method of using same |
| 12/27/2000 | EP1038087A4 Assembly and process for drilling and completing multiple wells |
| 12/27/2000 | EP0857247A4 Assembly and process for drilling and completing multiple wells |
| 12/26/2000 | US6164390 Method of determining characteristics of a rotary drag-type drill bit |
| 12/26/2000 | US6164388 Electropulse method of holes boring and boring machine |
| 12/26/2000 | US6164377 Downhole packer system |
| 12/26/2000 | CA2133240C Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means |
| 12/20/2000 | CN1059648C Mining filling and block low water-bearing cementing powder |
| 12/19/2000 | US6161636 Boring head and bit protective collar |
| 12/19/2000 | US6161631 Environmentally friendly horizontal boring system |
| 12/19/2000 | US6161630 Apparatus and method for controlling an underground boring tool |
| 12/19/2000 | US6161358 Modular mobile drilling system and method of use |
| 12/14/2000 | WO2000075476A1 Method of creating a wellbore |
| 12/13/2000 | EP1059146A2 Modular robot system |
| 12/12/2000 | US6158533 Adjustable gauge downhole drilling assembly |
| 12/12/2000 | US6158531 One pass drilling and completion of wellbores with drill bit attached to drill string to make cased wellbores to produce hydrocarbons |
| 12/12/2000 | US6158529 Rotary steerable well drilling system utilizing sliding sleeve |
| 12/12/2000 | US6158513 Multiple string completion apparatus and method |
| 12/08/2000 | CA2310338A1 Directional boring head |
| 12/07/2000 | WO2000073617A1 Drill, drilling method and extraction of hot water |
| 12/07/2000 | WO2000047860A3 Directional drilling apparatus |
| 12/07/2000 | WO2000037764A9 Improved steerable drilling system and method |
| 12/07/2000 | DE19925731C1 Drill head control device for tunneling drill has housing enclosing light component group with diode target light, target light source and control/evalaution circuit coupled to camera at opposite end of drill rod |
| 12/07/2000 | DE19924851A1 Multiblock-Robot System Multiblock robot system |
| 12/07/2000 | CA2310878A1 Lubrication and self-cleaning system for expansion mandrel |
| 12/06/2000 | EP0883729B1 Moling apparatus and a ground sensing system therefor |
| 12/06/2000 | CN1059253C Apparatus and method for combining two sets of drilling tools |
| 12/06/2000 | CN1059252C Radial drilling and well-building method from the main well |
| 12/05/2000 | US6155361 Hydraulic in-the-hole percussion rock drill |
| 12/05/2000 | US6155359 Vehicle mounted post hole digger |
| 12/05/2000 | US6155349 Flexible wellbore mill |
| 11/28/2000 | US6152244 Drilling apparatus mounted on wheels, with articulated chassis |
| 11/28/2000 | US6152222 Hydraulic device to be connected in a pipe string |
| 11/23/2000 | WO2000070183A1 In-tubing wellbore sidetracking operations |
| 11/23/2000 | WO2000047861A3 Hydraulic underreamer and sections for use therein |
| 11/23/2000 | WO2000029713A3 Method and apparatus for connecting a lateral branch liner to a main well bore |
| 11/22/2000 | EP0753095B1 Casing tube with casing shoe |
| 11/21/2000 | US6149349 Apparatus and method for extracting and replacing buried pipe |
| 11/21/2000 | US6149346 Method for replacement of existing pipes and device for carrying out the method |
| 11/21/2000 | US6148935 Joint for use in a directional boring apparatus |
| 11/21/2000 | US6148933 Steering device for bottomhole drilling assemblies |
| 11/21/2000 | US6148929 Feeler rod for water mains |
| 11/16/2000 | WO2000068542A1 Multiple cam directional controller for steerable rotary drill |
| 11/16/2000 | WO2000037766A3 Procedures and equipment for profiling and jointing of pipes |
| 11/15/2000 | EP1051560A1 Downhole motor assembly |
| 11/15/2000 | CN1058547C Assembly and process for drilling and completing multiple wells |
| 11/14/2000 | US6145933 Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting |
| 11/14/2000 | US6145600 Portable apparatus for soil sampling |
| 11/09/2000 | WO2000066872A1 Abrasive jet drilling assembly |
| 11/08/2000 | EP1050661A2 Improvements relating to subsea drilling of boreholes |
| 11/08/2000 | EP0796386B1 Arrangement for mounting swing cylinders in boom for rock drilling unit |
| 11/07/2000 | US6142545 Casing pushdown and rotating tool |
| 11/07/2000 | US6142250 Rotary drill bit having moveable formation-engaging members |
| 11/07/2000 | US6142246 Multiple lateral hydraulic drilling apparatus and method |