| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 05/19/2005 | US20050103528 Horizontal directional drilling in wells |
| 05/19/2005 | US20050103527 Dual wall drill string assembly |
| 05/19/2005 | US20050103491 Activity data capture system for a well service vehicle |
| 05/19/2005 | DE10344353A1 Bohrvorrichtung und Verfahren zum Verdrängungsbohren im Boden Drilling apparatus and method for displacement drilling in the ground |
| 05/18/2005 | EP1530546A2 Method and apparatus for moving a mass |
| 05/18/2005 | CN2700540Y Automatic well-head bias-adjusting device for pumping unit |
| 05/18/2005 | CN2700539Y Orientating and positioning device for delivering whipstock into branch well |
| 05/18/2005 | CN2700538Y Horizontal radial drilling device |
| 05/18/2005 | CN2700537Y Base of orientating and positioning device for branch well completion |
| 05/18/2005 | CN2700536Y Down hole drill driver's cabin arranged in forward direction |
| 05/18/2005 | CN1617973A Steerable rotary drill bit assembly with pilot bit |
| 05/18/2005 | CA2487460A1 A drilling machine having rotary tools |
| 05/18/2005 | CA2478622A1 Oil based drilling fluid |
| 05/18/2005 | CA2449869A1 Oil based drilling fluid |
| 05/17/2005 | US6893188 Continuous method of realization of works underground, tunnels and excavations in general with works of consolidation, permeabilization and drainage obtained through guided perforations |
| 05/17/2005 | US6892834 Piloted drill barrel and method of using same |
| 05/17/2005 | US6892830 Rotary steerable drilling tool and associated method of use |
| 05/17/2005 | US6892819 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/17/2005 | CA2365710C Method and apparatus for drilling and completing a well |
| 05/12/2005 | WO2005042914A1 Blow out preventer transfer platform |
| 05/12/2005 | WO2004097160B1 System and method using a continuously variable transmission to control one or more system components |
| 05/12/2005 | US20050098356 Auto-extending/retracting electrically isolated conductors in a segmented drill string |
| 05/12/2005 | US20050098350 Three dimensional steering system and method for steering bit to drill borehole |
| 05/12/2005 | US20050098349 Control systems and methods for active controlled bottomhole pressure systems |
| 05/12/2005 | US20050098323 Forming a wellbore casing while simultaneously drilling a wellbore |
| 05/11/2005 | EP1529148A1 Welded joints for rotary-vibratory drills having reduced stress |
| 05/11/2005 | CN2698846Y Device for supporting and enlarging pile hole |
| 05/11/2005 | CN1614194A Drilling machine for actuating liquid and breaking rock by explosive explosion high-pressure gas |
| 05/11/2005 | CN1614154A Rotary sucking style piling apparatus |
| 05/10/2005 | US6889781 Horizontal directional drilling in wells |
| 05/10/2005 | US6889779 Auger/vehicle interface jig |
| 05/10/2005 | CA2081806C Apparatus for drilling a curved subterranean borehole |
| 05/06/2005 | WO2005040546A1 Fluid jet drilling tool |
| 05/06/2005 | WO2004099550B1 Drilling aparatus |
| 05/06/2005 | WO2004081333A3 A method and apparatus for a downhole excavation in a wellbore |
| 05/06/2005 | CA2544093A1 Fluid jet drilling tool |
| 05/05/2005 | US20050092498 Methods for increasing production from a wellbore |
| 05/05/2005 | US20050092497 Blow out preventer transfer platform |
| 05/04/2005 | EP0996812B1 Deformed multiple well template and process of use |
| 05/04/2005 | DE10342083B3 Horizontal pipeline boring equipment for passing pipeline under river or canal has rive unit for drilling string set at slight angle to horizontal on one bank and guide frame on other bank |
| 05/04/2005 | DE10211833B4 Vorrichtung zum grabenlosen Austauschen oder Freilegen von Leitungen Apparatus for grave without replacing or exposing lines |
| 05/04/2005 | CN2697297Y Hole enlarging tool |
| 05/04/2005 | CN1611740A Drill bit |
| 05/03/2005 | US6886644 Apparatus and method for horizontal drilling |
| 05/03/2005 | CA2329471C Decentralizing, centralizing, locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 04/28/2005 | WO2005038189A1 Nozzle unit and method for excavating a hole in an object |
| 04/28/2005 | WO2004079196A3 Hydraulically-operated control system for a screw compressor |
| 04/28/2005 | CA2542413A1 Nozzle unit and method for excavating a hole in an object |
| 04/27/2005 | EP1525371A1 Telescopic guide line for offshore drilling |
| 04/27/2005 | CN2695599Y Semi-pull drill block for petroleum drilling and rapairing, equipment |
| 04/27/2005 | CN2695486Y Hydraulic expansion type soft base treatment device |
| 04/27/2005 | CN1199338C Improved coring drill motor and method for obtaining core sample of matter |
| 04/27/2005 | CN1199001C Method and equipment for obtaining data from underground rock |
| 04/26/2005 | US6883622 Method for drilling a wellbore using a bi-center drill bit |
| 04/26/2005 | CA2260612C Pneumatic hammer drilling assembly for use in directional drilling |
| 04/26/2005 | CA2187972C Two trip window cutting system |
| 04/24/2005 | WO2005017305A1 Angle and reactive torque control device for a gerotor type motor provided with a spindle and drilling bit in a bended drill string |
| 04/21/2005 | WO2004092530A3 Radially expanding casing and driling a wellbore |
| 04/21/2005 | WO2003060282A3 Method and apparatus for replacement of underground pipe |
| 04/21/2005 | US20050083060 Boring tool tracking/guiding system and method with unconstrained target location geometry |
| 04/20/2005 | EP1343994A4 Apparatus and method for inserting and removing a flexible first material into a second material |
| 04/20/2005 | CN2693936Y Elastic centralizer for sidetracked hole |
| 04/20/2005 | CN1608165A Jet cutting device with deflector |
| 04/20/2005 | CN1607315A Flexible compound orienting screw drill |
| 04/19/2005 | US6880649 Apparatus and method for directional drilling of holes |
| 04/19/2005 | US6880648 Apparatus and method for directional drilling of holes |
| 04/19/2005 | US6880631 Whipstock casing milling system |
| 04/14/2005 | WO2005033907A2 Activity data capture system for a well service vehicle |
| 04/14/2005 | WO2005033467A1 Method and device for the drilling of holes in ground or rocky material |
| 04/14/2005 | WO2005033466A2 Portable drilling apparatus |
| 04/14/2005 | WO2004094767A3 Expanded liner system and method |
| 04/14/2005 | WO2004005660A3 Active hold down system for jack-up drilling unit |
| 04/14/2005 | US20050077051 Radial expansion of tubular members |
| 04/14/2005 | US20050077048 Downhole tubular splitter assembly and method |
| 04/14/2005 | US20050077041 Head for injecting a fluid under pressure to break up ground from a borehole |
| 04/14/2005 | CA2540963A1 Method and device for the drilling of holes in ground or rocky material |
| 04/13/2005 | EP1354118A4 Backreamer |
| 04/13/2005 | EP0670950B2 Drilling apparatus |
| 04/12/2005 | US6878447 Polycrystalline diamond partially depleted of catalyzing material |
| 04/12/2005 | US6877570 Drilling with casing |
| 04/12/2005 | CA2164442C Apparatus for use in a wellbore |
| 04/12/2005 | CA2120485C Method and apparatus for sealing the juncture between a vertical and horizontal well |
| 04/07/2005 | WO2005031913A2 Antenna system |
| 04/07/2005 | WO2005031389A2 Obstacle detection for underground operations |
| 04/07/2005 | WO2005031109A1 A pipe assembly and a method for installation in a borehole |
| 04/07/2005 | WO2005031108A1 Method and device for boring holes in soil or rock |
| 04/07/2005 | WO2005031107A1 Method and device for boring holes in soil or rock |
| 04/07/2005 | US20050072598 Method and device for deviated coring and/or drilling |
| 04/07/2005 | US20050072587 Portable drilling apparatus |
| 04/07/2005 | DE10341437A1 Drilling rig and handling system which transfers inner and outer pipe sections between a rotary magazine and a parking position |
| 04/07/2005 | CA2540569A1 Method and device for boring holes in soil or rock |
| 04/06/2005 | EP1339939A4 A drilling tool used in horizontal drilling applications |
| 04/06/2005 | CN2690556Y Multihead screw drilling and grinding drilling machine |
| 04/06/2005 | CN2690553Y Open-air down-the-hole drill |
| 04/06/2005 | CN1603754A Integral optical electric axial angle encoder |
| 04/06/2005 | CN1603576A Real time measuring method and apparatus for horizontal directional drilling |
| 03/31/2005 | WO2005028805A1 Steerable bit assembly and methods |
| 03/31/2005 | US20050067166 Erectable arm assembly for use in boreholes |
| 03/30/2005 | EP1519000A1 Displacement drilling tool and method of use |
| 03/30/2005 | EP1044314B1 Drilling system including eccentric adjustable diameter blade stabilizer |