| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 03/09/2006 | US20060048971 Welded joints for rotary-vibratory drills having reduced stress |
| 03/09/2006 | US20060048970 Electronic roll indexing compensation in a drilling system and method |
| 03/08/2006 | EP1632638A1 Hydraulic drilling apparatus for confined space work |
| 03/08/2006 | EP1632637A1 Soil working tool and method for introducing a working element into the soil |
| 03/08/2006 | CN2763472Y Stabilizer for diamond drill |
| 03/08/2006 | CN2763468Y Directional sub for side drilling in casing opening |
| 03/08/2006 | CN2763459Y Low deflecting tool for casing of multi-lateral borehole |
| 03/08/2006 | CN2763458Y Positioning tool for whipstock of multi-lateral well |
| 03/08/2006 | CN2763457Y Normal open check valve in bottom of whipstock |
| 03/08/2006 | CN2763456Y Seal device for whipstock |
| 03/08/2006 | CN2763455Y Clamping device for whipstock |
| 03/08/2006 | CN2763454Y Side direction entering tool for multi-lateral well |
| 03/08/2006 | CN2763453Y Releasing gadget for side drilling in sleeve opening |
| 03/07/2006 | US7008141 Collapsible buoyancy device for risers on offshore structures |
| 03/02/2006 | WO2005124090A3 Steerable drill bit arrangement |
| 03/02/2006 | US20060042835 Apparatus and method for drilling a branch borehole from an oil well |
| 03/02/2006 | DE10112985B4 Schlagbohrkopf und ein Verfahren zum Horizontalbohren mit einem Schlaggerät Impact drill head and a method of horizontal drilling with a percussion device |
| 03/02/2006 | CA2821140A1 Pulsed electric rock drilling, fracturing, and crushing methods and apparatus |
| 03/01/2006 | EP1141511B1 Method for correcting positioning errors in rock drilling, and a rock drilling equipment |
| 03/01/2006 | EP1002181B1 Drill bit directional nozzle |
| 03/01/2006 | CN2761805Y Horizontal and directional hole marking device |
| 03/01/2006 | CN2761804Y Rotary excavating drill mounted on crane track |
| 03/01/2006 | CN1243904C Vertical drilling well slope-proof device |
| 03/01/2006 | CA2517753A1 Apparatus and method for drilling a branch borehole from an oil well |
| 02/28/2006 | US7006920 Activity data capture system for a well service vehicle |
| 02/28/2006 | US7004456 Engine speed limiter for a hoist |
| 02/28/2006 | US7004266 Adjustable downhole tool |
| 02/28/2006 | US7004264 Bore lining and drilling |
| 02/28/2006 | US7004263 Directional casing drilling |
| 02/28/2006 | CA2307627C Mill for use in a wellbore and method of milling |
| 02/23/2006 | US20060037785 Rotary Drill Bit |
| 02/23/2006 | US20060037784 Valve method for drilling with casing using pressurized drilling fluid |
| 02/23/2006 | US20060037779 Pulsed electric rock drilling apparatus |
| 02/23/2006 | US20060037759 Expandable whipstock anchor assembly |
| 02/23/2006 | DE102004039865A1 Drilling machine, especially for drilling earth or rock, has at least one spring device arranged between drill drive and holder via which drill drive is held on holder |
| 02/23/2006 | DE10146023B4 Steuerung für einen Schlagantrieb Control for an impact driver |
| 02/22/2006 | EP1627985A1 Rotary drill bit |
| 02/22/2006 | EP1627127A2 Fast moving drilling rig |
| 02/22/2006 | EP1278932B1 Apparatus and methods for forming a lateral wellbore |
| 02/22/2006 | CN2760212Y Eccentric wear proof screw drill |
| 02/22/2006 | CN2760209Y Rotary table powered directional drilling tool |
| 02/22/2006 | CN2760112Y Gradient extrusion-expansion device |
| 02/22/2006 | CN1738961A Wellstring assembly |
| 02/21/2006 | US7000888 Pump rod clamp and blowout preventer |
| 02/21/2006 | US7000714 Head for injecting a fluid under pressure to break up ground from a borehole |
| 02/21/2006 | US7000711 Horizontal bore cryogenic drilling method |
| 02/21/2006 | US7000695 Expanding wellbore junction |
| 02/21/2006 | CA2141266C Bearing arrangement for a turret in a vessel |
| 02/16/2006 | US20060032672 Lateral downhole drilling tool |
| 02/16/2006 | US20060032671 Cutting device and method for producing a cut hole |
| 02/16/2006 | US20060032638 Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| 02/16/2006 | DE202005020067U1 Device for producing stabilizing pillars in ground, especially drilling machine, has opening device with valve spring biased in the closing direction that can open or close free end of lance to release filler depending on pressure in lance |
| 02/15/2006 | EP1626159A2 Apparatus and methods for forming a lateral wellbore |
| 02/15/2006 | EP1625275A2 Drill bit and drilling system with underreamer- and stabilisation-section |
| 02/15/2006 | EP1379757B1 Oscillating shear valve for mud pulse telemetry |
| 02/15/2006 | CN2758701Y Three-light beam guiding measuring system for push bench |
| 02/15/2006 | CN2758441Y Hydraulic pulse drill bit |
| 02/15/2006 | CN2758437Y Well bottom local pulse negative pressure tool |
| 02/15/2006 | CN2758436Y Jet suction ball valve type pulse vibration well drilling tool |
| 02/15/2006 | CN2758435Y Rock soil hot melt crushing device |
| 02/15/2006 | CN2758434Y Guiding tube tracing drilling device for large tube canopy construction |
| 02/15/2006 | CN2758433Y Tracked walking type drill |
| 02/15/2006 | CN1734053A Down-hole sand control apparatus |
| 02/15/2006 | CN1242155C Abrasive jet well drilling tool assembly |
| 02/14/2006 | US6997647 Active hold down system for jack-up drilling unit |
| 02/14/2006 | US6997271 Drilling string torsional energy control assembly and method |
| 02/09/2006 | WO2006013594A1 Mobile basket for consolidation work on walls |
| 02/09/2006 | WO2006012731A2 Integrated magnetic ranging tool |
| 02/09/2006 | US20060028321 Integrated magnetic ranging tool |
| 02/09/2006 | US20060028207 Boring tool tracking/guiding system and method with unconstrained target location geometry |
| 02/09/2006 | US20060027398 Drill bit |
| 02/09/2006 | US20060027373 Drilling rig apparatus and downhole tool assembly system and method |
| 02/09/2006 | US20060027359 Whipstock assembly and method of manufacture |
| 02/09/2006 | DE19535906B4 Verfahren zur Herstellung einer verrohrten Gewinnungsbohrung A process for producing a cased production borehole |
| 02/09/2006 | DE102004033706A1 Device for making foundation boreholes in ground has drill rod with telescopic segments, load application arrangement for applying top load to drill head, lifting arrangement for raising and lowering drilling rod and drill head |
| 02/09/2006 | CA2506348A1 Junction assembly system and method for providing a downhole junction |
| 02/08/2006 | CN2756826Y Tracking receiving guide in non-excavation guide instrument system |
| 02/08/2006 | CN2756810Y Drillable automatic filling and casing float hoop inner core |
| 02/08/2006 | CN2756801Y Petroleum drilling rig power driving machine |
| 02/08/2006 | CN2756705Y Support disc pile enlarging and screw forming machine |
| 02/08/2006 | CN1730896A Strapdown type stable platform apparatus |
| 02/07/2006 | US6994494 Device for producing bored piles |
| 02/07/2006 | US6994171 Two section mast with self-aligning connections |
| 02/07/2006 | US6994165 Multilateral open hole gravel pack completion methods |
| 02/07/2006 | CA2225124C Drill tube |
| 02/07/2006 | CA2214914C Method of connecting conduits |
| 02/07/2006 | CA2211085C Multilateral sealing |
| 02/07/2006 | CA2197962C Apparatus and method for sampling an earth formation through a cased borehole |
| 02/06/2006 | CA2514757A1 Lateral downhole drilling tool |
| 02/02/2006 | WO2006012186A1 Drilling systems and methods utilizing independently deployable multiple tubular strings |
| 02/02/2006 | WO2006010906A1 Improvements in or relating to subsea drilling |
| 02/02/2006 | WO2006010877A1 System and method for drilling wellbores |
| 02/02/2006 | WO2006010549A1 Apparatus and method for joining a pipe conduit to a drilling device, expanding device, or feeding device |
| 02/02/2006 | US20060021797 Closed loop drilling assenbly with electronics outside a non-rotating sleeve |
| 02/02/2006 | US20060021755 Underbalanced marine drilling riser |
| 02/02/2006 | CA2572779A1 System and method for drilling wellbores |
| 02/01/2006 | EP1621722A1 Steerable excavator |
| 02/01/2006 | EP1620629A2 System and method using a continuously variable transmission to control one or more system components |
| 02/01/2006 | CN2755265Y Automatic device against inclination |
| 02/01/2006 | CN1729344A Bit assembly for a hammering drill |