| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 07/02/2008 | CN100398778C Method of fluid flowing in main cylinder via template guide cylinder, and template guide cylinder |
| 07/01/2008 | US7393158 Shrink for centralizer assembly and method |
| 07/01/2008 | US7393156 Construction apparatus for planting a series of vertical posts |
| 07/01/2008 | US7392858 Remote control for a drilling machine |
| 07/01/2008 | US7392857 Apparatus and method for vibrating a drill bit |
| 06/26/2008 | WO2008077083A1 Thread fatigue relief for tool joint |
| 06/26/2008 | WO2008074918A1 Drilling car for close spaces |
| 06/26/2008 | US20080149395 Drilling or Service Rig |
| 06/26/2008 | US20080149394 Steering system |
| 06/26/2008 | US20080149392 Damping Device For an Output Shaft in a Gearbox |
| 06/26/2008 | US20080149390 Preloaded Riser Coupling System |
| 06/26/2008 | US20080149389 Method of Using the Earth Mantle Substance for Hydrogen Production |
| 06/26/2008 | CA2671533A1 Drilling car for close spaces |
| 06/25/2008 | EP1936109A1 Drilling device comprising a rotational drive |
| 06/25/2008 | EP1272729B1 Whipstock asssembly |
| 06/25/2008 | CN201078191Y Mobile device of train mobile type low temperature drill |
| 06/25/2008 | CN201078190Y Prop mechanism of crawler drill |
| 06/25/2008 | CN101208494A Arrangement for positioning drilling unit |
| 06/25/2008 | CN101205796A Device for drilling big borehole with small drill head |
| 06/25/2008 | CN101205728A Endless-tracked multifunctional rotary excavating driller |
| 06/25/2008 | CN100396882C Crawler-type walking rockbolt drilling carriages |
| 06/24/2008 | US7389831 Dual-member auger boring system |
| 06/24/2008 | US7389830 Rotary steerable motor system for underground drilling |
| 06/24/2008 | US7389829 Method and apparatus for forming bored hole |
| 06/21/2008 | CA2614466A1 Steering system |
| 06/19/2008 | WO2008073874A1 Dual-direction ram-type blowout preventer seal |
| 06/19/2008 | WO2008071666A1 Method for breaking up hard rock, and a drilling apparatus |
| 06/19/2008 | WO2008043985A3 Method and apparatus for running tubulars |
| 06/19/2008 | US20080142270 Housing Arrangement |
| 06/19/2008 | US20080142269 Bi stable actuator and drilling system inlcuding same |
| 06/19/2008 | US20080142268 Rotary steerable drilling apparatus and method |
| 06/19/2008 | US20080142266 Tension/collar/reamer assemblies and methods |
| 06/19/2008 | US20080142265 Downhole Mechanism |
| 06/19/2008 | US20080142235 Drilling Unit |
| 06/19/2008 | CA2672463A1 Dual-direction ram-type blowout preventer seal |
| 06/18/2008 | EP1933003A1 Steerable bit assembly and methods |
| 06/18/2008 | EP1931853A1 Method and rock drilling rig for hole drilling |
| 06/18/2008 | EP1931748A2 Remotely controlled decoking tool used in coke cutting operations |
| 06/18/2008 | EP1454030B1 A boring head and a roller cutter and a saddle for a boring head for rotary drilling |
| 06/18/2008 | CN201074481Y Seat sleeve special for sleeve welldrilling |
| 06/18/2008 | CN201074479Y Rotary joint of novel directional drilling machine for conveying slurry |
| 06/18/2008 | CN101203656A Dth-hammer drilling device and overburden drilling method |
| 06/18/2008 | CN101200996A Double freedom degree drill bit |
| 06/18/2008 | CN101200995A Underground plumb orienting drill |
| 06/18/2008 | CN101200994A Method and apparatus for creating a borehole in the ground |
| 06/18/2008 | CN100395414C Bottom-expanding equipment for pipeline sinking precast reinforced concrete pile |
| 06/17/2008 | US7387176 Down hole air diverter |
| 06/17/2008 | US7387174 Device and method of lining a wellbore |
| 06/17/2008 | CA2482136C Orientable whipstock tool and method |
| 06/17/2008 | CA2384305C Abrasive jet drilling assembly |
| 06/13/2008 | CA2613876A1 Bi-stable actuator and drilling system including same |
| 06/12/2008 | WO2008070829A2 Automated mse-based drilling apparatus and methods |
| 06/12/2008 | WO2008070038A1 Expandable reamers for earth-boring applications and methods of using the same |
| 06/12/2008 | WO2008069089A1 Excavator for underground excavating, rotary excavator and underground excavating method |
| 06/12/2008 | WO2008068385A1 Arrangement and method for drilling |
| 06/12/2008 | US20080135299 Apparatus and Method for Characterizing a Reservoir |
| 06/12/2008 | US20080135298 Secondary retainer for a downhole hammer bit |
| 06/12/2008 | US20080135295 Fluid-actuated Hammer Bit |
| 06/12/2008 | US20080135294 Vibrational Apparatus |
| 06/12/2008 | US20080135289 Method for Running Casing While Drilling System |
| 06/12/2008 | US20080135271 Right angle driving tool |
| 06/11/2008 | EP1929125A1 System for tracking and maintaining an on-grade horizontal borehole |
| 06/11/2008 | CN201071722Y Pedrail self-propelled tunnel drilling rig hydraulic system |
| 06/11/2008 | CN201071721Y Pedrail type full hydraulic tunnel drilling rig |
| 06/11/2008 | CN201071711Y Drill-free blind plate |
| 06/11/2008 | CN201071682Y Bare hole side drilling whipstock |
| 06/11/2008 | CN201071681Y Horizontal stone drilling rig |
| 06/11/2008 | CN201071680Y Petroleum net electric drill |
| 06/11/2008 | CN101198763A Rock drill and method of breaking rock |
| 06/11/2008 | CN101196115A Construction method and device for high pressure underground gas storing well |
| 06/11/2008 | CN101196100A Electric hydraulic pressure workover treatment machine |
| 06/11/2008 | CN100393979C Hydraulic underreamer and sections for use therein |
| 06/10/2008 | US7383898 Inner and outer motor with eccentric stabilizer |
| 06/10/2008 | US7383897 Downhole steering tool having a non-rotating bendable section |
| 06/10/2008 | US7383889 Mono diameter wellbore casing |
| 06/05/2008 | WO2008066544A2 APPARATUS AND METHODS FOR SIDEWALL PERCUSSªON CORING USING A VOLTAGE ACTIVATED IGNITER |
| 06/05/2008 | WO2008064384A1 Device for percussion drilling or rotary percussion drilling in rocky material |
| 06/05/2008 | US20080128174 Expandable reamers for earth-boring applications and methods of using the same |
| 06/05/2008 | US20080128172 Drill stem connection and method |
| 06/05/2008 | US20080128171 Closed Loop Control Bore Hole Drilling System |
| 06/05/2008 | US20080128169 Restriction element trap for use with an actuation element of a downhole apparatus and method of use |
| 06/05/2008 | US20080128140 Methods and apparatus for wellbore construction and completion |
| 06/05/2008 | US20080128139 Utility skid tree support system for subsea wellhead |
| 06/05/2008 | DE102006023505B4 Bohrgerät und Verfahren zum Erstellen eines Bohrlochs im Boden Drill and method for creating a borehole in the ground |
| 06/04/2008 | EP1926884A2 Sub-surface deployment valve |
| 06/04/2008 | EP1926881A1 A percussion hammer for enlarging drilled holes |
| 06/04/2008 | CN201068737Y Multifunctional stabilizer rolling wheel |
| 06/04/2008 | CN201068736Y Vertical drilling tool |
| 06/04/2008 | CN201068735Y Stationary type conical eye guiding device |
| 06/04/2008 | CN201068734Y Vertical drilling tool |
| 06/04/2008 | CN201068733Y Aerated drilling safety gas injection device |
| 06/04/2008 | CN101191408A Ocean underwater device |
| 06/04/2008 | CN101191407A Well drilling method for shallow layer thick oil branching well |
| 06/04/2008 | CN101191406A Method for drilling ultra-shallow layer thick oil horizontal well by using vertical well drilling machine drill |
| 06/04/2008 | CN101191405A Rotary digging drilling machine jet flow reverse circulation rock drilling technique |
| 06/04/2008 | CN100392209C Rock salt deposit horizontal chamber type oil-gas depot and its building method |
| 06/03/2008 | US7381905 Structure for fixing an electronic device to a substrate |
| 06/03/2008 | US7381011 Lubrication system for pile and method of using the same |
| 06/03/2008 | US7380835 Single bore high flow junction plate |
| 06/03/2008 | US7380616 Automatic downlink system |