| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 11/06/1997 | CA2499225A1 Multi-lateral wellbore systems and methods for forming same |
| 11/06/1997 | CA2226148A1 Selective mono bore diverter system |
| 11/05/1997 | EP0805257A2 Guided drilling system with shock absorber |
| 11/05/1997 | EP0738366B1 Method of creating a borehole in an earth formation |
| 11/04/1997 | US5682956 Dual member pipe joint for a dual member drill string |
| 11/03/1997 | CA2803822A1 One trip milling system |
| 11/03/1997 | CA2684983A1 One trip milling system |
| 10/30/1997 | DE19616751A1 Counterboring drill |
| 10/30/1997 | CA2175296A1 Flow pulsing method and apparatus for the increase of the rate of drilling |
| 10/28/1997 | US5680901 Radial tie back assembly for directional drilling |
| 10/23/1997 | WO1997039218A1 Downhole electrode for well guidance system |
| 10/23/1997 | DE19615307A1 Hydraulic hammer action drill |
| 10/22/1997 | EP0802302A1 Riser that is to be detached near the water surface |
| 10/22/1997 | EP0801702A1 Drilling and pipe laying unit |
| 10/22/1997 | EP0670950B1 Drilling apparatus |
| 10/22/1997 | CN1162689A Apparatus and method for sampling earth formation through cased borehole |
| 10/22/1997 | CN1162686A Method and apparatus for drilling with flexible shaft while using hydraulic assistance |
| 10/21/1997 | US5679894 Apparatus and method for drilling boreholes |
| 10/21/1997 | US5678643 Acoustic logging while drilling tool to determine bed boundaries |
| 10/21/1997 | US5678635 Thru tubing bridge plug and method |
| 10/21/1997 | US5678634 Method and apparatus for retrieving a whipstock |
| 10/15/1997 | EP0800609A1 A drilling method and bit assembly to realize the method |
| 10/15/1997 | CN2264801Y Borehole path controller |
| 10/14/1997 | US5676212 Downhole electrode for well guidance system |
| 10/14/1997 | US5676206 Window-cutting system for downhole tubulars |
| 10/08/1997 | EP0799969A2 Process and device for pulling pipes or cables in a pilot hole |
| 10/08/1997 | EP0799363A1 Steerable drilling with downhole motor |
| 10/08/1997 | CN1161403A Method for deep drilling hole and floating down pipe |
| 10/07/1997 | US5673765 Downhole drilling subassembly and method for same |
| 10/07/1997 | US5673764 Drill string orienting motor |
| 10/07/1997 | US5673763 Modulated bias unit for rotary drilling |
| 10/07/1997 | US5673761 For manual drilling of holes in ice |
| 10/04/1997 | CA2201823A1 Method and apparatus for sinking the pipes or cables into a pilot borehole |
| 10/02/1997 | WO1997036085A1 Displacement machine |
| 10/02/1997 | DE19612122A1 Drilling bit for horizontally-steered subterranean boreholes |
| 10/02/1997 | DE19608815C1 Device for producing sealing floor in ground, used in construction |
| 10/01/1997 | EP0798443A2 Directional drilling method |
| 10/01/1997 | EP0628127B1 Downhole tool for controlling the drilling course of a borehole |
| 10/01/1997 | CN2263709Y Cycloid pinwheel diving drilling machine |
| 10/01/1997 | CN1036019C Drilling apparatus |
| 09/30/1997 | US5671816 Swivel/tilting bit crown for earth-boring drills |
| 09/30/1997 | CA2054080C Drill pipes for rotary-vibratory drills |
| 09/26/1997 | CA2201058A1 A method and system for steering and guiding a drill |
| 09/25/1997 | DE19611569A1 Pipe sinking and recovery of displaced hole ground |
| 09/25/1997 | DE19606630C1 Soil sample extraction device |
| 09/24/1997 | EP0796386A1 Arrangement for mounting swing cylinders in boom for rock drilling unit |
| 09/24/1997 | EP0796384A1 Drilling process and device |
| 09/24/1997 | EP0577845B1 Device for positioning member and excavating direction control device for excavator employing said device |
| 09/23/1997 | US5669457 Drill string orienting tool |
| 09/23/1997 | US5669454 To be driven into the ground to form a borehole |
| 09/23/1997 | CA2097154C Shielding apparatus |
| 09/18/1997 | WO1997034074A1 Underwater installation and method for building of an underwater installation |
| 09/18/1997 | DE19610238A1 Borehole widening or excavating tool |
| 09/17/1997 | EP0795679A2 Method and apparatus for establishing branch wells at a node of a parent well |
| 09/17/1997 | EP0795678A1 Device for enlarging the cross-section of a pilot borehole |
| 09/17/1997 | EP0795074A1 Method and apparatus for drilling with high-pressure, reduced solid content liquid |
| 09/16/1997 | US5667023 Method and apparatus for drilling and completing wells |
| 09/16/1997 | US5667013 Method and apparatus for supporting casing string from mobile offshore platform |
| 09/12/1997 | WO1997033065A1 Directional boring |
| 09/12/1997 | CA2248024A1 Directional boring |
| 09/10/1997 | EP0794315A1 Device for drilling in soil |
| 09/10/1997 | EP0793762A1 Pressure converter |
| 09/04/1997 | WO1997032110A2 Downhole core sampling and testing apparatus |
| 09/03/1997 | EP0792996A1 Apparatus for coupling a pipe string with a service for making earth bore holes |
| 09/03/1997 | EP0792995A1 Method for guiding of an earth drilling device |
| 09/03/1997 | EP0792407A1 Single-wire guidance system for drilling boreholes |
| 09/03/1997 | EP0678135B1 Installation for transmitting drive power to piling, cut-off or similar devices usable under water |
| 09/03/1997 | EP0587675B1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting |
| 09/03/1997 | CN1035784C Device, system and method for drilling and completing a lateral well |
| 09/02/1997 | US5662182 System for in situ replacement of cutting means for a ground drill |
| 09/02/1997 | US5662176 Truck mounted work implement |
| 08/28/1997 | WO1997031175A1 Moling apparatus and a ground sensing system therefor |
| 08/28/1997 | WO1997031174A1 Axial-vortex jet drilling system and method |
| 08/28/1997 | DE19606778A1 Sub-soil pneumatically-powered drilling method |
| 08/28/1997 | CA2251688A1 Moling apparatus and a ground sensing system therefor |
| 08/28/1997 | CA2246689A1 Axial-vortex jet drilling system and method |
| 08/27/1997 | EP0791723A1 Apparatus and method for sampling an earth formation through a cased borehole |
| 08/27/1997 | EP0791722A1 Apparatus and method for drilling with a flexible shaft from within a borehole |
| 08/27/1997 | EP0791721A1 Apparatus and method for drilling with a flexible shaft |
| 08/27/1997 | EP0760049B1 Whipstock and method for setting such a whipstock |
| 08/26/1997 | US5660239 Drag analysis method |
| 08/26/1997 | US5660234 Shallow flow wellhead system |
| 08/21/1997 | WO1997030262A1 An orientation device, particularly for a drilling tool or a well equipment |
| 08/21/1997 | WO1997030261A1 Dual-member pipe joint for a dual member drill string |
| 08/21/1997 | DE19605983A1 Precision grade drilling method producing constant inclination, gravity-draining pipeline bore |
| 08/20/1997 | EP0678134B1 Submersible driving unit for underwater ramming machinery and tools |
| 08/19/1997 | US5657826 Guidance system for drilling boreholes |
| 08/19/1997 | US5657823 Near surface disconnect riser |
| 08/19/1997 | US5657820 Two trip window cutting system |
| 08/12/1997 | US5655602 Apparatus and process for drilling and completing multiple wells |
| 08/06/1997 | EP0787886A2 Apparatus and method for directional drilling using coiled tubing |
| 08/06/1997 | EP0677135A4 Method and apparatus for setting a whipstock. |
| 08/05/1997 | US5653556 Clamping apparatus and methods for driving caissons into the earth |
| 08/05/1997 | US5653298 Vortex method |
| 08/05/1997 | US5653297 Blasthole drill with improved automatic breakout wrench |
| 08/05/1997 | US5653288 For laterally dispersing substances outward from an injection well |
| 07/31/1997 | WO1997027380A2 Method for forming a window in a tubular and apparatus for use in said method |
| 07/31/1997 | WO1997027379A1 Drilling tool |
| 07/31/1997 | CA2242341A1 Method for forming a window in a tubular and apparatus for use in said method |
| 07/30/1997 | EP0786043A1 Solenoid guide system for horizontal boreholes |