| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 06/21/1994 | US5322134 Drill head |
| 06/21/1994 | US5322127 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells |
| 06/16/1994 | DE4314102C1 Method for remote control of earth propulsion body - has starting device and compressed air or electrically operated propulsion drive together with control for fixing position alterations |
| 06/15/1994 | EP0506689B1 Drilling tool for widening a bore well |
| 06/15/1994 | EP0500609B1 Converter |
| 06/15/1994 | CN2168949Y Horizental drifting unit of drill |
| 06/15/1994 | CN1087966A Dual-tube driller |
| 06/15/1994 | CN1087965A Device, system and method for drilling and completing a lateral well |
| 06/14/1994 | US5320179 Steering sub for flexible drilling |
| 06/14/1994 | US5320178 Sand control screen and installation method for wells |
| 06/14/1994 | US5319959 Air lubricated penetrometer rod system |
| 06/09/1994 | WO1994012763A1 Anchor with deoperable screw |
| 06/09/1994 | WO1994012760A1 Drilling apparatus |
| 06/07/1994 | US5318132 Retrievable whipstock/packer assembly and method of use |
| 06/07/1994 | US5318121 Method and apparatus for locating and re-entering one or more horizontal wells using whipstock with sealable bores |
| 06/07/1994 | CA1329999C Method of underground fluid sampling |
| 06/01/1994 | CN1087397A Apparatus and method for forming piles |
| 05/31/1994 | US5316093 Fitting for controlled trajectory drilling, comprising a variable geometry stabilizer and use of this fitting |
| 05/31/1994 | US5316092 Method and apparatus for drilling a tunnel |
| 05/31/1994 | US5316091 Method for reducing occurrences of stuck drill pipe |
| 05/31/1994 | US5316090 Attitude control device and drilling-direction control device |
| 05/31/1994 | US5316089 Method and apparatus for drilling a subsea well |
| 05/31/1994 | CA1329931C Downhole stabilisers |
| 05/26/1994 | DE4308856C1 Drilling appts. for producing tubed deep bore, partic. for pile foundations - involves rope excavator with free fall device to which a tube rotary machine is linked |
| 05/24/1994 | US5314267 Horizontal pipeline boring apparatus and method |
| 05/24/1994 | US5314032 Movable joint bent sub |
| 05/24/1994 | US5314031 Directional drilling plug |
| 05/24/1994 | US5314030 System for continuously guided drilling |
| 05/24/1994 | CA2015497C Intermediate pipe-jacking apparatus |
| 05/17/1994 | US5312163 System for aiding operation of excavating type underground advancing machine |
| 05/17/1994 | US5311955 Installation for cleaning the zone near the drill hole |
| 05/17/1994 | US5311954 Process for overcoming drag while installing an element within a cavity |
| 05/17/1994 | US5311953 Drill bit steering |
| 05/17/1994 | US5311952 Apparatus and method for directional drilling with downhole motor on coiled tubing |
| 05/17/1994 | US5311951 Method of maintaining a borehole in a stratigraphic zone during drilling |
| 05/17/1994 | US5311936 Method and apparatus for isolating one horizontal production zone in a multilateral well |
| 05/17/1994 | CA2036674C Pipe bursting and replacement apparatus and method |
| 05/11/1994 | WO1994010420A1 Retrievable whipstock/packer assembly and method of use |
| 05/11/1994 | EP0433407B1 Moling system |
| 05/10/1994 | US5310014 Water well drilling accessory, mountable on cable tool water well drilling machinery, to provide for the simultaneous driving of water well casing pipe sections, while concurrently undertaking drilling operations |
| 05/10/1994 | US5310012 Actuating device associated with a drill string and comprising a hydrostatic drilling fluid circuit, actuation method and application thereof |
| 05/10/1994 | US5310011 For rock drilling equipment |
| 05/04/1994 | CN2163861Y Hoop pile spiral drilling tool |
| 05/03/1994 | US5308150 Cutter head for a rock boring apparatus |
| 05/03/1994 | US5307886 Method for casing a hole drilled in a formation |
| 05/03/1994 | US5307885 Attitude and drilling-direction control device |
| 05/03/1994 | US5307882 Apparatus for feeding a drilling machine in extension rod drilling |
| 05/03/1994 | CA1329194C Ice auger |
| 05/03/1994 | CA1329193C Tubular element for use in a rotary drilling assembly |
| 04/28/1994 | WO1994009386A1 Vibrating hole forming device for seismic exploration |
| 04/28/1994 | WO1994009248A1 Method for forming a window in a subsurface well conduit |
| 04/28/1994 | WO1994009244A1 Underreamer |
| 04/28/1994 | WO1994009243A2 Retrievable whipstock system |
| 04/28/1994 | DE4308547C1 Trenchless pipe laying system with hydraulic/pneumatic drive - has pipe sections joined by profiled sleeve and with ram on rear section and flushing head on front of pipeline |
| 04/28/1994 | CA2125772A1 Retrievable whipstock system |
| 04/27/1994 | EP0594418A1 Automatic downhole drilling system |
| 04/27/1994 | CN1085981A Grouting method for rubber pocket sealing and sealing device therefor |
| 04/26/1994 | US5306101 Cutting/expanding tool |
| 04/26/1994 | US5305838 Device comprising two articulated elements in a plane, applied to a drilling equipment |
| 04/21/1994 | DE4235378A1 Method for erosion injection into soils etc - uses continuous process to cut open and mill out soil, and inject binding agent suspension continuously into hole |
| 04/20/1994 | EP0592547A1 Pile driving machine. |
| 04/20/1994 | CN2162527Y Radial horizontal drilling slanting making device with steering support |
| 04/19/1994 | US5303784 Drilling apparatus |
| 04/19/1994 | US5303783 Horizontal earth bore tool |
| 04/19/1994 | CA1328693C Method of predicting and controlling the drilling trajectory in directional wells |
| 04/19/1994 | CA1328655C Rotary drill |
| 04/13/1994 | EP0591196A1 Method and apparatus for jet cutting |
| 04/12/1994 | US5302053 Apparatus for replacing buried pipe |
| 04/12/1994 | US5301760 Completing horizontal drain holes from a vertical well |
| 04/12/1994 | US5301758 Method and apparatus for enlarging a bore hole |
| 04/05/1994 | US5299639 Methods and apparatus for removing debris from a well bore |
| 03/31/1994 | WO1994006999A1 Arrangement for measuring the position of a feed beam in a rock drilling apparatus and/or measuring the position of a rock drill |
| 03/31/1994 | WO1994006996A1 Whipstock assembly |
| 03/31/1994 | WO1993020288A3 Cut expansion joint sealing device for concrete dams and method for fitting same |
| 03/30/1994 | EP0588954A1 Apparatus for detecting boundary stratum |
| 03/30/1994 | EP0441890B1 Directional drilling apparatus and method |
| 03/29/1994 | US5297641 Drilling deviation control tool |
| 03/29/1994 | US5297640 Drill collar for use in horizontal drilling |
| 03/29/1994 | US5297638 Drivepipe guide and installation method for wells |
| 03/23/1994 | EP0588373A1 Double-tube core taking apparatus for inclined drilling |
| 03/23/1994 | EP0588143A1 Earth drill for placing a concrete pile in situ |
| 03/23/1994 | EP0587675A1 Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting. |
| 03/23/1994 | CN2159450Y Casing drill |
| 03/22/1994 | US5295766 Apparatus and method for building a foundation for uprights or for making passages therethrough |
| 03/22/1994 | CA1327966C Method and apparatus for setting an underwater drilling system |
| 03/18/1994 | EP0588954A4 Method and apparatus for detecting boundary stratum. |
| 03/17/1994 | WO1994005941A1 Guided mole |
| 03/17/1994 | WO1994005892A1 Template and process for drilling and completing multiple wells |
| 03/17/1994 | DE4300075C1 Drive energy transmission system for underwater plant - uses supply lines and umbilical cable handled separately with plug-in coupling at bottom end. |
| 03/17/1994 | DE4230624A1 Remote controlled mechanical mole - has streamlined casing mounted on hollow cylindrical shock absorber |
| 03/17/1994 | CA2142123A1 Guided mole |
| 03/15/1994 | CA1327789C Drilling system |
| 03/15/1994 | CA1327788C Method for excavating hole and apparatus therefor |
| 03/15/1994 | CA1327706C Existing pipeline renewing method and apparatus therefor |
| 03/10/1994 | DE4236209A1 Sheet pile casing insertion into building structure ground - involves first aligning sheet pile casing over ground in required orientation and fitting drill in casing |
| 03/10/1994 | DE4228951C1 Air lance to reveal cables buried in the ground etc. - has grip and release valve located on housing away from modulator, and spring tension setting screw on housing |
| 03/08/1994 | US5291957 Cutting tool for the erosion of a surface |
| 03/08/1994 | US5291956 Coiled tubing drilling apparatus and method |
| 03/02/1994 | EP0584475A1 Drilling device provided with an acceleration nozzle |
| 03/02/1994 | EP0431039B1 A device for boring holes in the ground |