| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 08/17/2005 | EP1563160A2 Tensioning system for production tubing in a riser at a floating installation for hydrocarbon production. |
| 08/17/2005 | CN2718204Y Centralising device for synneusis diamond drilling tool |
| 08/17/2005 | CN2718196Y Whipstock for window cutting side drilling |
| 08/16/2005 | US6929330 Method and system for mining hydrocarbon-containing materials |
| 08/16/2005 | US6929077 Boring head, roller cutter and saddle for a boring head for rotary drilling |
| 08/16/2005 | US6929075 Automated bore planning system for horizontal directional drilling |
| 08/16/2005 | CA2487155C Hydraulic underreamer and sections for use therein |
| 08/16/2005 | CA2270162C Deformed multiple well template and process of use |
| 08/16/2005 | CA2233853C Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations |
| 08/11/2005 | WO2005073508A1 Method for the generation of deep-drillings in geological structures |
| 08/11/2005 | WO2005073495A1 Device for the production of deep drilling in geological structures |
| 08/11/2005 | WO2005050257A8 High temperature imaging device |
| 08/11/2005 | WO2004092530B1 Radially expanding casing and driling a wellbore |
| 08/11/2005 | US20050173156 Horizontal bore cryogenic drilling method |
| 08/11/2005 | US20050173153 Earth penetrating apparatus and method employing radar imaging and rate sensing |
| 08/11/2005 | DE102004004316A1 Verfahren zum Herstellen von Tiefbohrungen in geologischen Strukturen A method for producing deep holes in geological structures |
| 08/11/2005 | DE102004003898A1 Verdrängerbohrer Displacement drill |
| 08/10/2005 | CN2716483Y Downhole vibrodrilling tool induced by hydraulic pulse |
| 08/10/2005 | CN1651715A Method of entering target geologic body and system |
| 08/10/2005 | CN1213928C Device for transforting particles of magnetic material |
| 08/09/2005 | US6926100 Hole reaming apparatus and method |
| 08/04/2005 | WO2005071225A1 Automated drill string position survey |
| 08/04/2005 | WO2005071210A1 Single mill casing window cutting tool |
| 08/04/2005 | WO2005071209A1 Positive displacement drill |
| 08/04/2005 | WO2005071208A1 Downhole drilling of a lateral hole |
| 08/04/2005 | WO2005033466A3 Portable drilling apparatus |
| 08/04/2005 | US20050168224 Receiver electronics proximate antenna |
| 08/04/2005 | US20050167160 Method and apparatus for horizontal drilling and oil recovery |
| 08/04/2005 | US20050167158 One-step directional coring or drilling system |
| 08/04/2005 | US20050167157 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 08/04/2005 | US20050167099 Method for the placement of subterranean electrodes |
| 08/04/2005 | CA2553236A1 Downhole drilling of a lateral hole |
| 08/04/2005 | CA2553002A1 Automated drill string position survey |
| 08/03/2005 | EP1559866A1 Methods of completing a subterranean well and associated apparatus |
| 08/03/2005 | EP1559864A1 Downhole drilling of a lateral hole |
| 08/03/2005 | EP1558831A2 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 08/03/2005 | CN2714792Y Oil-gas branch well tapping arrangement |
| 08/03/2005 | CN1648402A Root pile buried pipe excavator |
| 08/02/2005 | US6923274 Retrievable pre-milled window with deflector |
| 08/02/2005 | US6923273 Well system |
| 08/02/2005 | US6923261 Apparatus and method for expanding a tubular |
| 08/02/2005 | CA2447254C Well cavity positioning method |
| 07/28/2005 | WO2005068893A1 Device for replacing pipes without trenching |
| 07/28/2005 | WO2004104358A3 Continuous on-bottom directional drilling method and system |
| 07/28/2005 | US20050161262 Variable density treatment fluids and methods of using such fluids in subterranean formations |
| 07/28/2005 | US20050161261 Steerable soil penetration system |
| 07/28/2005 | US20050161237 Method of cleaning hole diggers and spot cultivators and hole digger cleaning device |
| 07/28/2005 | US20050161222 Apparatus and methods for forming a lateral wellbore |
| 07/27/2005 | EP1190155B1 Rock drill and mounting frame |
| 07/27/2005 | CN1644869A Completion device and method for branch well with pre-windows |
| 07/26/2005 | US6922056 Bore location system |
| 07/26/2005 | US6920945 Method and system for facilitating horizontal drilling |
| 07/26/2005 | US6920944 Apparatus and method for drilling and reaming a borehole |
| 07/26/2005 | CA2366496C Steerable modular drilling assembly |
| 07/21/2005 | WO2005065364A2 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 07/21/2005 | US20050155793 Stabilized soil core samples and method for preparing same |
| 07/21/2005 | US20050155771 Apparatus and methods for expanding tubulars in a wellbore |
| 07/21/2005 | US20050155766 Flexible wellbore broach |
| 07/20/2005 | CN1211563C Method for establishing multi-branches nodes and method for drilling branch hole from mother holes |
| 07/19/2005 | US6918453 Method of and apparatus for directional drilling |
| 07/14/2005 | WO2005064114A1 Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements |
| 07/14/2005 | WO2005062830A2 System, method and apparatus for petrophysical and geophysical measurements at the drilling bit |
| 07/14/2005 | WO2005062764A2 Adjustable hole cleaning device |
| 07/14/2005 | WO2005062749A2 System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| 07/14/2005 | US20050152749 Telescopic guide pipe for offshore drilling |
| 07/14/2005 | US20050150692 Directional cased hole side track method applying rotary closed loop system and casing mill |
| 07/14/2005 | US20050150691 High temperature environment tool system and method |
| 07/14/2005 | US20050150690 Methods of casing drilling |
| 07/14/2005 | US20050150689 Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements |
| 07/14/2005 | US20050150688 Plasma channel drilling process |
| 07/14/2005 | US20050150656 Single mill casing window cutting tool |
| 07/14/2005 | DE10359880A1 Boring rod system for horizontal directional boring, has bending unit with connection sides for boring rod and drilling tool, respectively such that bending unit is arranged between drilling tool and boring rod |
| 07/13/2005 | EP1552103A1 Drill head steering |
| 07/13/2005 | EP1362159A4 Shoe with earth formation disiplacing structure |
| 07/13/2005 | CN2709708Y Pump with integral gear pair |
| 07/13/2005 | CN2709628Y Arc surface whipstock for side wall drilling |
| 07/13/2005 | CN1210485C Rock drill and mounting frame |
| 07/12/2005 | US6917202 Boring tool tracking/guiding system and method with unconstrained target location geometry |
| 07/12/2005 | US6915853 Method and device for perforating a portion of casing in a reservoir |
| 07/12/2005 | CA2139663C Whipstock assembly |
| 07/09/2005 | CA2451952A1 Imparting stability to coal while drilling coal-bed methane |
| 07/07/2005 | WO2005061837A1 Closed end directional driving shoe |
| 07/07/2005 | WO2005061836A1 Trenchless pipe laying method and device |
| 07/07/2005 | WO2005061835A1 Method for drilling and lining a wellbore |
| 07/07/2005 | US20050145392 Wellbore liner system |
| 07/07/2005 | US20050145381 Orientable whipstock tool and method |
| 07/07/2005 | CA2550194A1 Method for drilling and lining a wellbore |
| 07/06/2005 | EP1550788A2 Three dimensional steerable system |
| 07/06/2005 | CN2707938Y Apparatus for judging state of diverter on ground |
| 07/06/2005 | CN2707937Y Oil-gas branch well reentering apparatus |
| 07/06/2005 | CN1635259A Hot spring exploitation |
| 07/05/2005 | US6913097 Transportation, storage, and installation system for rig utilities |
| 07/05/2005 | US6913095 Closed loop drilling assembly with electronics outside a non-rotating sleeve |
| 07/05/2005 | US6913094 Leading body for ground drilling and ground drilling machine |
| 07/05/2005 | US6913091 Method and apparatus for replacement of underground pipe |
| 07/05/2005 | CA2246425C An orientation device, particularly for a drilling tool or a well equipment |
| 06/30/2005 | US20050139353 Earth loop installation with sonic drilling |
| 06/30/2005 | DE10356696B3 Verfahren und Vorrichtung zur grabenlosen Verlegung von Rohrleitungen Method and apparatus for grave loose laying of pipelines |
| 06/30/2005 | DE10354082A1 Verfahren zum unterirdischen Anschließen eines Produktenrohres an einem Sammler sowie Vorrichtung zur Durchführung eines darin verwirklichten Verfahrensschrittes A method for connecting a subterranean products tube to a collector as well as apparatus for carrying out a process step embodied therein |
| 06/29/2005 | EP1546510A2 Drilling rig having a compact compressor/pump assembly |