| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
|---|
| 07/10/2001 | CA2111356C Method and apparatus for detecting boundary stratum |
| 07/05/2001 | WO2001048353A1 Autonomous omnidirectional driller |
| 07/05/2001 | WO2001048351A2 Subsea well intervention vessel |
| 07/05/2001 | US20010006120 Multiple air hammer apparatus and excavating direction correcting method therefor |
| 07/04/2001 | EP0815337B1 Traction boring device using multiple trepans for producing large cuts in concrete works and the like and method of producing cuts |
| 07/04/2001 | EP0796384B1 Drilling process and device |
| 07/04/2001 | CN1068084C Boring jig and method for producing pile in borehole |
| 07/03/2001 | US6253852 Lateral branch junction for well casing |
| 07/03/2001 | CA2037409C Rotary drilling device with azimut adjustment means of the drilling tool path and drilling process using same |
| 07/03/2001 | CA2009378C Device in impact machines |
| 06/28/2001 | WO2001046554A1 Long range electronic guidance system for locating a discrete in-ground boring device |
| 06/28/2001 | WO2001046550A1 Drilling bit for drilling while running casing |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/27/2001 | EP1109988A1 Jet excavating device |
| 06/26/2001 | US6250404 Directional boring head |
| 06/26/2001 | US6250403 Device and method for enlarging a Bore |
| 06/21/2001 | WO2001044614A2 Remote lock-out system and method for a horizontal direction drilling system |
| 06/21/2001 | US20010004025 Device for drilling and draining holes in soil or rock |
| 06/20/2001 | CN1299915A Automatically controlled rotation-controllable drilling system and drilling method |
| 06/19/2001 | US6247544 Duckbill with cutting teeth |
| 06/19/2001 | US6247541 Method of drive pipe replacements on offshore platforms |
| 06/19/2001 | US6247532 Apparatus for establishing branch wells from a parent well |
| 06/16/2001 | CA2328196A1 Apparatus for mounting an electronic device for use in directional drilling |
| 06/14/2001 | WO2001042616A1 A hydraulic drilling rig |
| 06/13/2001 | EP1106779A2 Riser tensioning construction |
| 06/13/2001 | EP1106777A1 Method and apparatus for steering a directional drilling tool |
| 06/13/2001 | EP1105618A1 Device for drilling or draining holes in soil or rock |
| 06/13/2001 | EP1105617A1 Whipstock |
| 06/12/2001 | US6244783 Widening apparatus |
| 06/12/2001 | US6244361 Steerable rotary drilling device and directional drilling method |
| 06/12/2001 | US6244345 Lockable swivel apparatus and method |
| 06/12/2001 | US6244339 Apparatus for and a method of drilling a lateral borehole |
| 06/12/2001 | US6244337 System for sealing the intersection between a primary and a branch borehole |
| 06/07/2001 | WO2001040699A1 Cable tensioning device for bursting/flaring devices |
| 06/07/2001 | US20010002626 Method of creating a wellbore in an underground formation |
| 06/07/2001 | DE19957903A1 Device for producing bore holes and for setting anchors in surrounding rock has advance feed unit displaceably arranged on support carriage and connectable to drill bar or anchor bar via adapter |
| 06/07/2001 | DE19955345A1 Bohrkopf mit Energieerzeugungsvorrichtung Drilling head with energy generating device |
| 06/06/2001 | EP0888490B1 Mill for wellbore milling operations |
| 06/05/2001 | US6241030 Hydraulic underreamer and sections for use therein |
| 06/05/2001 | US6241029 Earth formation surveying device |
| 06/05/2001 | CA2013710C A rock drilling apparatus |
| 05/31/2001 | WO2001038682A1 Self-propelled tool-carrier |
| 05/31/2001 | DE19953461A1 Guiding drilling rocket involves sectional and discontinuous rotation of supply line that compensates axial deviation to achieve straight travel |
| 05/30/2001 | CN1297098A High-pressure water jet controllable spin drill bit |
| 05/29/2001 | US6238141 Apparatus for static underground drilling |
| 05/29/2001 | US6237702 Hydraulic underreamer and sections for use thereof |
| 05/29/2001 | US6237701 Impulsive suction pulse generator for borehole |
| 05/25/2001 | WO2001036781A2 Drill head with a power generation device |
| 05/23/2001 | EP1101013A1 Reverse circulation drilling system with bit locked underreamer arms |
| 05/23/2001 | CN2431393Y Electromechanical hydraulic integrated automatic vertical drilling tool |
| 05/23/2001 | CN2431392Y Mechanical hydraulic integrated automatic vertical drilling tool |
| 05/23/2001 | CN2431391Y Remote-controlled adjustable curve shell screw drilling tool in well |
| 05/23/2001 | CN2431390Y Remote-controlled mechanical hydraulic inclination reducing tool in well |
| 05/22/2001 | US6234719 Mobile combined drilling and piling machine and method for tubular foundation with machine |
| 05/22/2001 | US6234259 Multiple cam directional controller for steerable rotary drill |
| 05/22/2001 | US6234257 Deployable sensor apparatus and method |
| 05/17/2001 | WO2001034935A1 Control method for use with a steerable drilling system |
| 05/17/2001 | DE19948649C1 Verfahren zur grabenlosen Auswechselung erdverlegter Rohrleitungen Process for the grave without replacement of buried pipelines |
| 05/17/2001 | CA2359073A1 Control method for use with a steerable drilling system |
| 05/16/2001 | EP1099072A1 Method and device for laying an underground duct made of a plastic material |
| 05/16/2001 | CN1065943C Method and facilities for drilling well, logging and early trial production at same time |
| 05/15/2001 | US6233524 Closed loop drilling system |
| 05/15/2001 | US6230820 Universal drive point device |
| 05/15/2001 | CA2009734C Device in impact machines |
| 05/10/2001 | WO2001033045A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033044A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033030A1 Drive pipe replacement on offshore platforms |
| 05/10/2001 | DE19950040A1 Vorrichtung zum Niederbringen verlaufkontrollierter Bohrungen Apparatus for sinking bores extending controlled |
| 05/10/2001 | CA2376544A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/09/2001 | EP1098065A1 Method for drilling a tunnel |
| 05/09/2001 | EP1098064A1 Auger drilling device |
| 05/09/2001 | CN2429619Y Inserted guider for side track in bare hole |
| 05/09/2001 | CN1065607C Process and equipment for pulling pipes laid or to be laid in ground |
| 05/08/2001 | US6227312 Drilling system and method |
| 05/08/2001 | US6227311 Drill pipe guiding apparatus for a horizontal boring machine method |
| 05/08/2001 | CA2106754C Positioning device for a member and drilling-direction control device for a drilling system employing said positioning device |
| 05/03/2001 | WO2001031164A1 Drilling-workover vessel having a drill string extending through at least one swivel |
| 05/03/2001 | WO2001031160A1 Method and apparatus for operations in underground/subsea oil and gas wells |
| 05/03/2001 | WO2001031159A1 One trip milling system |
| 05/03/2001 | WO2000057543A8 High frequency switch-mode dc powered computer system |
| 05/03/2001 | DE19948345A1 Construction process for horizontal well filter uses well filter tube with filter gravel jacket inserted into dead end bore protected by bore hole tubing |
| 05/03/2001 | DE19615307C2 Hydraulischer Bohrhammer A drill |
| 05/02/2001 | EP1096103A1 Drill-out bi-center bit |
| 05/01/2001 | US6223839 Hydraulic underreamer and sections for use therein |
| 05/01/2001 | US6223823 Method of and apparatus for installing casing in a well |
| 04/26/2001 | WO2001029371A1 Device for the progress-controlled drilling of bores |
| 04/26/2001 | WO2001029364A1 Underreamer and method of use |
| 04/26/2001 | WO2001029362A1 Positioning and conveying well apparatus and method |
| 04/25/2001 | EP1094196A1 Method and soil-sampling device for preparing soil samples |
| 04/24/2001 | US6220372 Apparatus for drilling lateral drainholes from a wellbore |
| 04/19/2001 | WO2001027433A1 Method and apparatus for replacing a conduit |
| 04/18/2001 | EP1092937A2 Enclosure for installation in the seabed |
| 04/18/2001 | EP1092901A2 Method for removing and/or replacing an underground conduit |
| 04/18/2001 | EP1092077A1 Milling system for forming a window in the wall of a tubular |
| 04/17/2001 | US6216802 Gravity oriented directional drilling apparatus and method |
| 04/17/2001 | US6216779 Downhole tool actuator |
| 04/12/2001 | WO2001025677A1 Creation of a protective jacket during the laying of lines |
| 04/12/2001 | WO2001025652A2 Torque transmission system for helical drilling tools |
| 04/12/2001 | WO2001025642A1 Method of cavitation of a flow of liquid and device therefor |
| 04/12/2001 | WO2001025588A1 Method and device for construction of an underground pipe duct |