| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 04/04/1995 | US5403122 Process, in particular to install sewer pipes and a device to carry out the process |
| 04/04/1995 | US5402855 Coiled tubing tools for jet drilling of deviated wells |
| 04/04/1995 | CA1335097C Percussive mole boring device with electronic transmitter |
| 03/22/1995 | EP0643794A1 Method of creating a wellbore in an underground formation. |
| 03/22/1995 | EP0517874B1 Device comprising two elements hinged in a plane, used in drilling equipment |
| 03/21/1995 | US5399042 Axial/radial swivel |
| 03/21/1995 | US5398754 Retrievable whipstock anchor assembly |
| 03/16/1995 | WO1995007404A2 Apparatus for use in a wellbore |
| 03/15/1995 | CN2191919Y Driving device for light drill |
| 03/14/1995 | US5396966 Steering sub for flexible drilling |
| 03/14/1995 | CA2055421C Trenchless pipeline replacement |
| 03/09/1995 | WO1995006800A1 Arrangement for mounting slides |
| 03/09/1995 | DE4432408A1 Bohrgerät und -verfahren Drill and procedures |
| 03/08/1995 | EP0641634A1 Apparatus for forming kerfs in the wall of a borehole |
| 03/07/1995 | US5394951 Bottom hole drilling assembly |
| 03/07/1995 | US5394950 Method of drilling multiple radial wells using multiple string downhole orientation |
| 03/07/1995 | US5394949 Mobile soil sampling device |
| 03/04/1995 | CA2130736A1 Drilling apparatus and method |
| 03/01/1995 | CN1099456A Automatic pressure unit |
| 02/28/1995 | US5393172 Shield tunneling machine |
| 02/28/1995 | US5392868 Directional multi-blade boring head |
| 02/28/1995 | US5392867 Device for remotely operating and assembly comprising a bean/needle system, and use thereof in a drill string |
| 02/28/1995 | US5392858 Milling apparatus and method for well casing |
| 02/22/1995 | EP0639690A1 Double wall pipe for propulsion technique and construction of pipe end of leading pipe |
| 02/21/1995 | US5390750 Downhole compaction and stabilization back reamer and drill bit |
| 02/21/1995 | US5390748 Method and apparatus for drilling optimum subterranean well boreholes |
| 02/21/1995 | CA1334534C Thermochemical penetrator for ice and frozen soils |
| 02/21/1995 | CA1334482C Method and apparatus for production of underground pipelines |
| 02/14/1995 | US5388654 Ground-boring device |
| 02/14/1995 | US5388653 Directional drilling apparatus |
| 02/14/1995 | US5388648 Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means |
| 02/09/1995 | WO1995004236A1 Underground pipe replacement technique |
| 02/09/1995 | CA2167811A1 Underground pipe replacement technique |
| 02/07/1995 | US5386878 Rock boring process and apparatus |
| 02/02/1995 | WO1995003255A1 Process and device for dewatering tailings |
| 02/02/1995 | DE4325290A1 Wake nozzle |
| 02/01/1995 | CN2188647Y 等离子火焰钻机 Plasma flame rig |
| 02/01/1995 | CN2188646Y Side drilling tool |
| 02/01/1995 | CN2188645Y Pneumatic hole digger |
| 02/01/1995 | CN1098162A Underground border with down hammer |
| 01/24/1995 | US5383524 Method and equipment for aligning the feeding beam of a rock drilling equipment |
| 01/24/1995 | US5383522 Whipstock and method |
| 01/18/1995 | EP0633965A1 Cut expansion joint sealing device for concrete dams and method for fitting same |
| 01/18/1995 | CN1097391A Anchor with deoperable screw |
| 01/12/1995 | WO1995001496A1 Arrangement in a rock drilling equipment |
| 01/10/1995 | US5379845 Method for setting a whipstock in a wellbore |
| 01/10/1995 | US5379844 Offshore platform well system |
| 01/10/1995 | US5379843 Side-tracking cement plug |
| 01/04/1995 | EP0631645A1 Down reaming apparatus |
| 01/03/1995 | US5377770 For tunneling through the ground |
| 01/03/1995 | US5377767 Hole digger |
| 01/03/1995 | US5377551 Probe for penetrating and displacing particularly into a mass of pulverulent material |
| 12/28/1994 | EP0533716B1 Apparatus for feeding a drilling machine in extension rod drilling |
| 12/28/1994 | CN2186292Y Hydraulic lift curb plate type radial horizontal well inclined apparatus |
| 12/27/1994 | US5375945 Method and apparatus for thrusting a pipeline into bore hole |
| 12/27/1994 | US5375671 Converter group and pressure converter for use therein |
| 12/27/1994 | US5375669 Method and apparatus for cleaning a borehole |
| 12/27/1994 | US5375668 Borehole, as well as a method and an apparatus for forming it |
| 12/27/1994 | CA2012933C Directional rod pusher |
| 12/22/1994 | WO1994029568A1 Multi-lateral selective re-entry tool |
| 12/22/1994 | WO1994029563A1 Method for completing multi-lateral wells and maintaining selective re-entry into laterals |
| 12/22/1994 | WO1994029562A1 Scoophead/diverter assembly for completing lateral wellbores |
| 12/22/1994 | CA2142112A1 Scoophead/diverter assembly for completing lateral wellbores |
| 12/21/1994 | EP0629259A1 A method and a device for sealing between a casing and a drill hole in rock drilling operations. |
| 12/20/1994 | US5373906 Orientable guide assembly and method of use |
| 12/14/1994 | EP0628127A1 Downhole tool for controlling the drilling course of a borehole. |
| 12/08/1994 | WO1994028280A1 Method of drilling multiple radial wells using multiple string downhole orientation |
| 12/08/1994 | WO1994021889A3 Improvements in or relating to drilling and to the extraction of fluids |
| 12/08/1994 | DE4318736A1 Method and apparatus for taking gas and/or oil and/or water and/or solid samples during drilling operation |
| 12/07/1994 | EP0627040A1 Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 12/07/1994 | CN1026910C Hoop pile drilling tool |
| 12/06/1994 | US5370479 Shielding apparatus |
| 12/06/1994 | CA2032493C Recoverable sleeve assembly for pipe joint |
| 12/06/1994 | CA1333412C Method of magnetizing well tubulars |
| 12/01/1994 | DE4329582C1 Device for making longitudinal notches in the wall of a borehole |
| 11/30/1994 | EP0626500A2 Directional multi-blade boring head |
| 11/29/1994 | US5368415 Spiral flights for improved soil mixing and efficient boring for use on multi-shaft auger soil mixing apparatus |
| 11/29/1994 | US5368111 Directional drilling sub with improved multi-slot locking arrangement |
| 11/29/1994 | US5368109 Apparatus for arcuate drilling |
| 11/29/1994 | CA1333281C Straight hole drilling method and assembly |
| 11/29/1994 | CA1333254C Cutting torch having peripheral venting means |
| 11/26/1994 | CA2116267A1 Directional multi-blade boring head |
| 11/24/1994 | WO1994027028A1 Earth dumping control device for a small diameter pipe propelling machine |
| 11/23/1994 | EP0625671A1 Burried pipeline reconstruction process and device |
| 11/23/1994 | CN2183441Y Directional splitting combined drilling tool |
| 11/22/1994 | US5366029 Large shaft over-reamer apparatus and method |
| 11/22/1994 | US5366015 Method of cutting high strength materials with water soluble abrasives |
| 11/17/1994 | EP0624706A2 Directional drilling system with integrated formation evaluation logging tool |
| 11/17/1994 | EP0279812B2 Method for restoring underground pipelines |
| 11/15/1994 | US5363929 Downhole fluid motor composite torque shaft |
| 11/15/1994 | US5363927 Apparatus and method for hydraulic drilling |
| 11/15/1994 | US5363925 Mobile drilling machine |
| 11/13/1994 | CA2123273A1 Steerable motor system with integrated formation evaluation logging capacity |
| 11/10/1994 | WO1994025721A1 Drilling kick-off device |
| 11/10/1994 | WO1994025688A1 Process for sealing off ground sites and device for carrying out this process |
| 11/10/1994 | CA2161779A1 A method for sealing off grounds sites |
| 11/09/1994 | EP0623187A1 Whipstock for oil and gas wells |
| 11/09/1994 | CN2182258Y Efficient light self-moving driller |
| 11/08/1994 | US5361857 Pressure converter |
| 11/08/1994 | US5361855 Method and casing for excavating a borehole |