| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 04/01/2003 | US6540020 Motor by-pass valve |
| 03/27/2003 | WO2003025337A1 Striking train for a ground-boring machine |
| 03/27/2003 | US20030056990 Inverted motor for drilling rocks, soils and man-made materials and for re-entry and cleanout of existing wellbores and pipes |
| 03/27/2003 | US20030056963 Apparatus for controlling a downhole drilling motor assembly |
| 03/27/2003 | CA2357999A1 Apparatus for controlling a downhole drilling motor assembly |
| 03/26/2003 | EP1295005A1 Milling of casing using coiled tubing |
| 03/20/2003 | WO2003023182A1 Assembly for drilling low pressure formation |
| 03/20/2003 | WO2002025061A9 Apparatus for drilling large bore holes in rock and soil |
| 03/20/2003 | US20030051919 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 03/20/2003 | US20030051916 Method of drilling, analyzing and stabilizing a terrestrial or other planetary subsurface formation |
| 03/20/2003 | US20030051889 Control system for a percussion drive |
| 03/20/2003 | US20030051885 Tubing expansion |
| 03/19/2003 | EP1292757A1 System for creating a conduit in a borehole formed in an earth formation |
| 03/19/2003 | EP0733152B1 An in-hole rock drilling machine |
| 03/18/2003 | US6533050 Excavation bit for a drilling apparatus |
| 03/13/2003 | WO2003021073A2 Method and apparatus for replacement of underground pipe |
| 03/13/2003 | CA2458923A1 Method and apparatus for replacement of underground pipe |
| 03/12/2003 | EP1291486A1 Rotary coiled tubing |
| 03/11/2003 | US6530439 Flexible hose with thrusters for horizontal well drilling |
| 03/06/2003 | US20030044238 Method and apparatus for replacement of underground pipe |
| 03/05/2003 | EP1289032A1 Power tool, battery pack and attachment/ejection mechanism therefor |
| 03/05/2003 | CN2538941Y Hydraulic automatic pressurizing pump |
| 03/05/2003 | CA2356570A1 Air operated earth drilling tool |
| 03/04/2003 | US6527513 Turbine for down-hole drilling |
| 02/27/2003 | WO2003016671A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/27/2003 | US20030039880 Power tool with battery pack ejector |
| 02/27/2003 | CA2454865A1 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/26/2003 | CN1399703A Device for manipulating tool in well tubular |
| 02/25/2003 | CA2238782C Method and apparatus for radially drilling through well casing and formation |
| 02/20/2003 | US20030034177 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/19/2003 | CN1397715A Hydraulic in-the-hole hammer with dual nozzles and combined valve |
| 02/18/2003 | US6520271 Fluid powered rotary drilling assembly |
| 02/13/2003 | WO2003012242A1 Downhole motor lock-up tool |
| 02/13/2003 | WO2002044508A3 Pneumatic rock-boring device and method for horizontal drilling using compressed air and drilling medium |
| 02/13/2003 | US20030029618 Method and system for moving equipment into and through an underground well |
| 02/13/2003 | US20030029308 Speed governor |
| 02/12/2003 | EP1088151B1 Downhole milling device |
| 02/11/2003 | US6516899 Method and apparatus for directional boring under mixed conditions |
| 02/11/2003 | US6516898 Continuous wellbore drilling system with stationary sensor measurements |
| 02/06/2003 | US20030024739 Method and apparatus for directional boring under mixed conditions |
| 02/05/2003 | EP1076754B1 Pneumatic submersible boring tool |
| 01/30/2003 | WO2002044509A8 Tractor with improved valve system |
| 01/30/2003 | US20030019665 Reamer tool |
| 01/29/2003 | EP0951611B1 Wellbore tractor |
| 01/23/2003 | US20030015352 Flow retarder for bearing assembly of downhole drilling motor |
| 01/22/2003 | EP1276952A1 Backreaming tool |
| 01/21/2003 | US6508317 Downhole apparatus and method of use |
| 01/16/2003 | WO2002095180A3 Impact downhole tool |
| 01/16/2003 | CA2353160A1 Robotic proboscis pipeline apparatus |
| 01/16/2003 | CA2353113A1 Flow retarder for bearing assembly of downhole drilling motor |
| 01/15/2003 | EP1274916A1 Percussive down-the-hole rock drilling hammer and piston therefor |
| 01/15/2003 | CN1098963C Method for extending drill system and starting/finishing drilling process therewith |
| 01/09/2003 | US20030007372 High frequency power system and related methods |
| 01/08/2003 | CN2530018Y Power transmission mechanism of impacter |
| 01/07/2003 | US6502650 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein |
| 01/01/2003 | CN1388301A Disconnection preventor for electric submerged pump |
| 12/31/2002 | US6499544 Percussive down-the-hole hammer for rock drilling, and a one-way valve used therein |
| 12/27/2002 | WO2002103150A2 Tubing expansion |
| 12/12/2002 | WO2002099242A1 Drilling apparatus |
| 12/12/2002 | US20020185312 Impact tool |
| 12/11/2002 | CN2525239Y Electric drilling machine without drill stem |
| 12/04/2002 | EP1051560B1 Downhole motor assembly |
| 12/03/2002 | US6488105 Method and apparatus for subsurface exploration |
| 12/03/2002 | US6488103 Drilling tool and method of using same |
| 11/28/2002 | WO2002095180A2 Impact downhole tool |
| 11/26/2002 | US6484820 Method and device for driving bore-holes, especially in the sea bed, using a guide tip |
| 11/20/2002 | CN1094554C Multifunctional submerged drill |
| 11/14/2002 | WO2002091554A1 Downhole torque generator |
| 11/14/2002 | WO2002091553A1 Downhole torque-generating and generator combination apparatus |
| 11/14/2002 | WO2002090713A1 Apparatus for and method of radial expansion of a tubular member |
| 11/14/2002 | US20020166701 Apparatus and method for directional drilling with coiled tubing |
| 11/14/2002 | US20020166700 Rotational impact drill assembly |
| 11/12/2002 | US6478097 Electrically sequenced tractor |
| 11/07/2002 | WO2002042647A3 Hydraulic drill string accumulator |
| 11/03/2002 | CA2384549A1 Impact tool |
| 10/31/2002 | US20020157868 Well casing installation and removal apparatus and method |
| 10/31/2002 | US20020157867 Apparatus and method for coring and/or drilling |
| 10/30/2002 | CN2519009Y Horizontal drilling pipe-laying drilling device |
| 10/29/2002 | US6470978 Fluid drilling system with drill string and retro jets |
| 10/29/2002 | US6470974 Three-dimensional steering tool for controlled downhole extended-reach directional drilling |
| 10/24/2002 | WO2002046565A3 Speed governor |
| 10/22/2002 | US6467558 Multiple air hammer apparatus and excavating direction correcting method therefor |
| 10/22/2002 | US6467557 Long reach rotary drilling assembly |
| 10/22/2002 | US6467554 Quick reverse mechanism for pneumatic boring tool |
| 10/22/2002 | CA2067616C Device in hammer machines |
| 10/17/2002 | WO2002081855A1 Hydraulic in-the-hole percussion rock drill |
| 10/17/2002 | WO2002046564A3 Boring apparatus |
| 10/17/2002 | US20020148650 Long gauge roller vane drilling motor |
| 10/15/2002 | US6464023 Hydraulic in-the-hole percussion rock drill |
| 10/15/2002 | US6464003 Gripper assembly for downhole tractors |
| 10/09/2002 | EP1247936A1 Apparatus and method for coring and/or drilling |
| 10/09/2002 | EP1246993A1 Three dimensional steerable system |
| 10/08/2002 | US6462964 High frequency power generator and related methods |
| 10/03/2002 | WO2002077406A1 Percussion drill head |
| 10/03/2002 | US20020139585 Reverse circulation drilling system with bit locked underreamer arms |
| 10/02/2002 | EP1244865A1 Long gauge roller vane drilling motor |
| 10/02/2002 | DE10112985A1 Schlagbohrkopf Impact drill head |
| 09/25/2002 | EP1242713A1 Controlling the flow of driving fluid to a system of multiple hydraulic motors |
| 09/25/2002 | CN1371544A High frequency switch-mode dc powered computer system |
| 09/24/2002 | US6454026 Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure |