| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 05/05/2004 | CN2614257Y Well drilling guiding device |
| 05/05/2004 | CN1494642A Bundle of pipes and method for parallel arrangement of pipes according to bore and swivel method |
| 05/04/2004 | CA2210442C A cutter head, boring jig and device and process for sea bottom boring |
| 04/29/2004 | WO2004035984A1 Drill head steering |
| 04/29/2004 | US20040081516 Bundle of pipes and method for parallel arrangement of pipes according to a bore and swivel method |
| 04/29/2004 | US20040079555 Sampling isolator |
| 04/29/2004 | US20040079553 Reverse circulation directional and horizontal drilling using concentric drill string |
| 04/29/2004 | US20040079552 Directional drilling apparatus |
| 04/29/2004 | US20040079528 Tubing anchor |
| 04/28/2004 | EP1413708A1 Thrust transmitting element for driving pipes |
| 04/28/2004 | EP1412605A2 Improved stabilizer for use in a drill string |
| 04/28/2004 | EP1236005B1 Cable tensioning device for bursting/flaring devices |
| 04/28/2004 | EP1222357B1 One trip milling system |
| 04/28/2004 | EP0839297B1 Method for replacing buried pipe |
| 04/27/2004 | US6727704 Boring tool tracking/guiding system and method with unconstrained target location geometry |
| 04/27/2004 | US6725950 Post hole digger |
| 04/27/2004 | US6725948 Method of regulating the feed force of a drilling device |
| 04/27/2004 | US6725946 Excavation apparatus |
| 04/27/2004 | US6725936 Method for drilling a plurality of offshore underwater wells |
| 04/27/2004 | US6725919 Forming a wellbore casing while simultaneously drilling a wellbore |
| 04/27/2004 | CA2054919C Drill string component |
| 04/27/2004 | CA2001745C Downhole combination tool |
| 04/22/2004 | WO2004033841A2 Methods and apparatus for riserless drilling |
| 04/22/2004 | WO2004033840A2 Methods and apparatus for open hole drilling |
| 04/22/2004 | WO2003016671A3 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 04/22/2004 | US20040074649 Method of drilling and operating a subsea well |
| 04/21/2004 | EP1411207A2 Sampling isolator |
| 04/21/2004 | EP1409835A1 Drilling direction control device |
| 04/21/2004 | EP0817901B1 Dual-member pipe joint for a dual member drill string |
| 04/21/2004 | CN2612792Y Down-hole high pressure continuous stream jetting drilling tool |
| 04/21/2004 | CN1146689C Remote controlled wall bent housing angle changing method and device and application |
| 04/20/2004 | US6722454 Device for drilling, in particular percussion drilling or rotary percussion drilling, boreholes |
| 04/20/2004 | US6722453 Stabilized downhole drilling motor |
| 04/20/2004 | US6722451 Casing while drilling |
| 04/15/2004 | WO2004031531A1 Engine speed limiter for a hoist |
| 04/15/2004 | WO2004031528A2 Drilling rig having a compact compressor/pump assembly |
| 04/15/2004 | US20040070257 Method and system for mining hydrocarbon-containing materials |
| 04/15/2004 | US20040069535 Method for generating pressure fluctuations in a flowing fluid |
| 04/15/2004 | US20040069533 Pneumatic rock-boring device and method for starting such a device |
| 04/15/2004 | US20040069501 Apparatus and methods for drilling with casing |
| 04/15/2004 | US20040069496 Wellbore isolation apparatus, and method for tripping pipe during underbalanced drilling |
| 04/14/2004 | EP1407114A1 Rock-bolting apparatus and method |
| 04/14/2004 | EP1407112A1 Method for producing earth boreholes |
| 04/14/2004 | EP1407110A1 Steerable rotary drill bit assembly with pilot bit |
| 04/14/2004 | EP1153193B1 Directional drilling apparatus |
| 04/14/2004 | EP1086292B1 A drilling tool |
| 04/14/2004 | CN2611574Y Headframe fixing device |
| 04/14/2004 | CN2611570Y Torque divider |
| 04/14/2004 | CN2611569Y Reducing stabilizer for drilling pressure control |
| 04/14/2004 | CN1488818A Jacketed disc pile and piling method, extruding-expanding device, pile sinking machine and use |
| 04/13/2004 | US6719069 Underground boring machine employing navigation sensor and adjustable steering |
| 04/13/2004 | US6719045 Whipstock assembly |
| 04/13/2004 | US6718899 Method for installing a number of risers or tendons and vessel for carrying out said method |
| 04/08/2004 | WO2004029401A1 One-step directional coring or drilling system |
| 04/08/2004 | WO2003076760A3 Steerable soil penetration system |
| 04/08/2004 | WO2003046329A3 A wellhead assembly for communicating with the casing hanger annulus |
| 04/08/2004 | US20040067110 Active hold down system for jack-up drilling unit |
| 04/08/2004 | US20040067108 Device and method for changing lines |
| 04/08/2004 | US20040065874 Engine speed limiter for a hoist |
| 04/08/2004 | US20040065475 Method and apparatus for riserless drilling |
| 04/08/2004 | US20040065474 Methods and apparatus for open hole drilling |
| 04/07/2004 | EP1405983A2 Drilling system including eccentric adjustable diameter blade stabilizer |
| 04/07/2004 | CN2610058Y Remote regulating centering guide |
| 04/07/2004 | CN2610057Y Roller overgauge stabilizer |
| 04/07/2004 | CN1145193C Wafer carrier |
| 04/07/2004 | CN1144933C Equipment and method for sampling from earth formation through cased borehole |
| 04/06/2004 | US6717410 Bore location system |
| 04/06/2004 | US6715962 Assembly and floatation method for drilling drivepipe |
| 04/06/2004 | US6715570 Two stage downhole drilling fluid filter |
| 04/06/2004 | US6715567 Apparatus and method for forming a pilot hole in a formation |
| 04/06/2004 | US6715566 Balance structure for rotating member |
| 04/06/2004 | US6715564 Hydraulic drilling rig |
| 04/06/2004 | US6715563 Method and apparatus for vibratory kinetic energy generation and applications thereof |
| 04/06/2004 | CA2233093C Assembly and process for drilling and completing multiple wells |
| 04/06/2004 | CA2211883C Apparatus for establishing branch wells from a parent well |
| 04/01/2004 | WO2004027214A1 Pitch sensing in drilling machines |
| 04/01/2004 | US20040060740 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 04/01/2004 | US20040060739 Method and system for building modular structures from which oil and gas wells are drilled |
| 04/01/2004 | US20040060736 Method for the drilling of the initial phase of deep water oil wells with an underwater well head |
| 04/01/2004 | US20040060717 Drilling rig having a compact compressor/pump assembly |
| 04/01/2004 | US20040060700 Method for drilling and casing a wellbore with a pump down cement float |
| 04/01/2004 | DE202004001258U1 Vorrichtung zum Herstellen von Tiefbohrungen in geologischen Strukturen An apparatus for producing deep holes in geological structures |
| 03/31/2004 | EP1402146A1 Earth drilling device |
| 03/31/2004 | EP1402145A1 Closed loop drilling assembly with electronics outside a non-rotating sleeve |
| 03/31/2004 | EP1402144A1 A wellbore directional steering tool |
| 03/31/2004 | EP1179115B1 In-tubing wellbore sidetracking operations |
| 03/31/2004 | CN2608669Y Pump pressure controlling reducing diameter stabilizer |
| 03/30/2004 | US6712149 Apparatus and method for spacing out of offshore wells |
| 03/30/2004 | US6712144 Method for drilling multilateral wells with reduced under-reaming and related device |
| 03/30/2004 | US6712142 Apparatus and methods for expanding tubulars in a wellbore |
| 03/30/2004 | CA2198442C Self-extinguishing burning bar |
| 03/25/2004 | WO2004025072A1 Method and system for controlling pressure in a dual well system |
| 03/25/2004 | WO2004025042A2 Method of installing adjustable flange on tube |
| 03/25/2004 | US20040055789 Drilling mast with movable and fixed unscrewing vice |
| 03/25/2004 | US20040055787 Method and system for circulating fluid in a well system |
| 03/25/2004 | US20040055755 Method of hydraulically actuating and mechanically activating a downhole mechanical apparatus |
| 03/25/2004 | US20040055744 Method and apparatus to vibrate a downhole component |
| 03/24/2004 | EP1400654A2 Command method for a steerable rotary drilling device |
| 03/24/2004 | EP1399644A1 Method for preparing wellbore casing for installation |
| 03/24/2004 | EP1399641A1 Pipe centralizer and method of attachment |