| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 07/25/1990 | EP0305658B1 Milling device for slits |
| 07/18/1990 | EP0378348A1 A cast-in-place piling method and apparatus |
| 07/18/1990 | EP0250526B1 Soil displacement hammer |
| 07/12/1990 | WO1990007625A1 Directional drilling apparatus |
| 07/11/1990 | EP0377378A1 Method and apparatus for the remote control of a drill string equipment by information sequences |
| 07/11/1990 | EP0377373A1 Controlled directional drilling assembly with a variable-angle elbow element, and its use |
| 07/11/1990 | EP0377153A2 Boring ram |
| 07/11/1990 | EP0377042A1 Device for making wells in ground |
| 07/11/1990 | EP0266386B1 Improvements in drilling using downhole drilling tools |
| 07/04/1990 | EP0376811A1 Remote actuator with a nozzle-needle system |
| 07/04/1990 | EP0376805A1 Controlled directional drilling assembly with a variable geometry stabiliser, and its use |
| 07/03/1990 | US4938299 For positioning downhole within a drill pipe string |
| 07/03/1990 | US4938298 Directional well control |
| 07/03/1990 | US4938297 Ram boring machine |
| 07/03/1990 | US4938296 Drill rig assembly |
| 06/30/1990 | CA2006938A1 Drill string equipment information sequence remote control method and device |
| 06/27/1990 | CN1043288A Hose and cable reel arrangement for rock drilling equipment |
| 06/26/1990 | US4936709 Method and apparatus for laying pipes in the ground with advance of propulsion shafts installed with pipe-supporting attachments |
| 06/26/1990 | US4936708 Apparatus for directing forward movement of a rod |
| 06/21/1990 | DE3842548A1 Method of widening pre-made bores |
| 06/21/1990 | DE3842376A1 Device for boring chimney shafts |
| 06/20/1990 | EP0373205A1 Process and device for monitoring the advance of a drilling head in the ground |
| 06/19/1990 | US4934978 Rotation-elastic damped cutting device |
| 06/14/1990 | WO1990004082A3 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 06/13/1990 | EP0372225A2 Boring ram |
| 06/13/1990 | DE3939969A1 Schlauch- und kabelwindeanordnung einer gesteinsbohrvorrichtung Hose and cable winch arrangement of a rock |
| 06/13/1990 | DE3838537A1 Process for the underground production and for the lining of elongate cavities, in which it is not possible to walk, by the in-situ pipe |
| 06/13/1990 | CN2058203U Deep-well bomb |
| 06/13/1990 | CN1008382B Pile driver, pile drawer and/or drilling machine |
| 06/12/1990 | US4932482 Downhole motor with an enlarged connecting rod housing |
| 06/12/1990 | US4932175 Telescopic drilling derrick apparatus |
| 06/12/1990 | CA1270113A1 Method for determining formation dip |
| 06/08/1990 | CA2004876A1 Hose and cable reel arrangement for a rock drilling apparatus |
| 06/08/1990 | CA2002983A1 Telescopic drilling derrick apparatus |
| 06/05/1990 | US4930586 Hydraulic drilling apparatus and method |
| 06/05/1990 | US4930575 Method of protecting a permeable formation |
| 06/05/1990 | US4930542 Method for restoring underground pipelines |
| 05/31/1990 | WO1990005829A1 Well expander |
| 05/30/1990 | EP0370709A1 Flow pulsing apparatus for drill string |
| 05/30/1990 | EP0370183A2 Procedure for welding an underground pipeline conduit to a following pipe |
| 05/29/1990 | US4928866 Pipe burster |
| 05/29/1990 | US4928776 Drilling assembly |
| 05/29/1990 | US4928767 Method and apparatus for setting and retrieving a deflection tool |
| 05/29/1990 | US4928757 Hydraulic well penetration apparatus |
| 05/23/1990 | EP0369745A2 Directional drilling tool |
| 05/23/1990 | EP0368887A1 Selectively phased water supply of a cutter head. |
| 05/23/1990 | DE3839003A1 Device for the removal of soil samples with a soil auger from three soil depths for soil investigations |
| 05/18/1990 | CA2002594A1 Directional drilling tool |
| 05/17/1990 | WO1990005235A1 Directional drilling apparatus and method |
| 05/16/1990 | EP0368079A1 Apparatus for demolishing pipes on the inside |
| 05/16/1990 | EP0367889A1 Tilt mechanism for truck-mounted drilling machines |
| 05/15/1990 | US4925344 Method and apparatus for replacing buried pipe |
| 05/15/1990 | US4925320 Feed beam arrangement for a rockdrill |
| 05/15/1990 | US4924951 Manhole cutter |
| 05/08/1990 | US4923019 Thermochemical penetrator for ice and frozen soils |
| 05/08/1990 | US4922763 Method and an apparatus for taking soil samples |
| 05/08/1990 | CA1268703A1 Well penetration apparatus and method |
| 05/03/1990 | WO1990004697A1 Downhole combination tool |
| 05/03/1990 | WO1990004684A1 Device for making holes in the ground |
| 05/03/1990 | DE3826169A1 Hydro-jet freeze-boring method and apparatus |
| 05/02/1990 | EP0366567A2 Downhole combination tool |
| 05/02/1990 | EP0365612A1 Drill. |
| 05/01/1990 | US4921057 Method and device for making a hole in the ground |
| 05/01/1990 | US4921055 Soil displacement hammer |
| 04/27/1990 | CA2001412A1 Apparatus for making holes in the ground |
| 04/26/1990 | DE3835901A1 Verfahren zum austausch einer im erdboden verlegten rohrleitung A method for exchange of a laid in the ground pipeline |
| 04/25/1990 | EP0364641A1 Treatment of metallurgical vessels |
| 04/25/1990 | EP0279812B1 Method for restoring underground pipelines |
| 04/19/1990 | WO1990004082A2 An underground pipe for a thrust boring method and a connecting construction of the underground pipe for the same |
| 04/18/1990 | EP0363899A1 Rotary bucket assembly |
| 04/18/1990 | EP0363424A1 Apparatus for working in pipes |
| 04/18/1990 | CN1007635B Underearth propeller |
| 04/17/1990 | US4917195 Quick latch mud mat apparatus |
| 04/12/1990 | DE3903302C1 Drilling appliance |
| 04/11/1990 | EP0362292A1 Device to cut, drill or similarly machine rock, ore, concrete or similar |
| 04/10/1990 | US4915618 Igniter for thermal lance |
| 04/10/1990 | US4915543 Existing pipeline renewing method and apparatus therefor |
| 04/10/1990 | CA1267707A1 Above-ground arrangement for and method of locating a discrete inground boring device |
| 04/04/1990 | EP0362158A2 Vibrator for installing on drilling machine "rotaries" |
| 04/04/1990 | EP0361805A1 Percussive mole boring device with electronic transmitter |
| 04/04/1990 | CN1007440B Countercycle drilling method with pump and its apparatus |
| 04/03/1990 | US4913246 Rotary gad for ground drill |
| 04/03/1990 | US4913243 Percussion drill and method of controlling same |
| 04/03/1990 | US4913238 Floating/tensioned production system with caisson |
| 03/29/1990 | DE3832715A1 Arrangement for producing a deflecting bore |
| 03/28/1990 | EP0360364A2 Riser tensioner |
| 03/28/1990 | EP0360321A1 Process for laying a pipeline through an earth mass |
| 03/28/1990 | CN2055175U Wheel type well dredge machine |
| 03/28/1990 | CN1040849A Method for boring hole in ground and apparatus therefor |
| 03/27/1990 | US4911579 Swivel arrangement for connecting a boring or reaming tool to a cable |
| 03/27/1990 | CA1267178A1 Manipulative device |
| 03/22/1990 | WO1990002864A1 A borehole, as well as a method and an apparatus for forming it |
| 03/21/1990 | EP0358786A1 Superimposing drilling device |
| 03/21/1990 | EP0324778A4 Boring apparatus. |
| 03/20/1990 | US4909336 Drill steering in high magnetic interference areas |
| 03/13/1990 | US4907658 Percussive mole boring device with electronic transmitter |
| 03/13/1990 | US4907657 Method for protecting a shallow water well |
| 03/08/1990 | WO1990002242A1 A device for boring holes in the ground |
| 03/07/1990 | EP0357314A2 Device for controlling the position of a self-propelled drilling tool |
| 03/07/1990 | EP0356666A2 Boring ram for laying service lines without excavation |