| Patents for E21B 7 - Special methods or apparatus for drilling (22,064) |
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| 07/26/2006 | CN2799834Y Erosion resistance elbow for gas drilling |
| 07/26/2006 | CN1807827A Method and apparatus for high precision horizontal drilling on reinforced concrete |
| 07/26/2006 | CN1807769A Screw pile forming device and forming method |
| 07/26/2006 | CN1266367C Remote lock-out system and method for horizontal direction drilling system |
| 07/25/2006 | US7080701 Electrically sequenced tractor |
| 07/25/2006 | CA2403293C Apparatus to actuate downhole tool |
| 07/25/2006 | CA2198235C Arrangement for controlling boom for rock drilling unit |
| 07/20/2006 | WO2006076547A2 System and method for producing fluids from a subterranean formation |
| 07/20/2006 | US20060157283 Steerable drilling system |
| 07/20/2006 | US20060157281 Bi-directional rotary steerable system actuator assembly and method |
| 07/20/2006 | US20060157280 Drilling efficiency through beneficial management of rock stress levels via controlled oscillations of subterranean cutting elements |
| 07/20/2006 | US20060157279 Fixed-head bit with stabilizing features |
| 07/20/2006 | US20060157276 Pipe burster with spherical bursting member |
| 07/20/2006 | US20060157275 Method and system for building modular structures from which oil and gas wells are drilled |
| 07/20/2006 | US20060157242 System and method for producing fluids from a subterranean formation |
| 07/20/2006 | DE102005001407A1 Measurement and control signals` transmitting method for boring ground to insert new pipe, involves transmitting sound waves in fluid of pipe with preset frequency by relay transmitter, and receiving sound waves by relay receiver |
| 07/19/2006 | CN2797610Y Single phase electric motor type agricultural well drilling machine |
| 07/19/2006 | CN2797609Y Novel vehicle-carried travelling type electric driven 10 tons well reparing machine |
| 07/19/2006 | CN2797608Y Spiral digging drilling machine |
| 07/19/2006 | CN1804364A Drillable thin-walled hydraulic release device for liner and operation method thereof |
| 07/19/2006 | CN1804231A Stirring shaft capable of decreasing ambient foundation deformation for deep mixing pile |
| 07/19/2006 | CN1265076C Sensor arranging device and method for measuring property parameters of underground stratum |
| 07/19/2006 | CN1265074C Dual-guide rail dual-hydraulic cylinder deep-sea core drilling machine |
| 07/19/2006 | CN1265073C Modulated rotary guide offset devices |
| 07/18/2006 | US7078905 Bore location system |
| 07/18/2006 | US7077213 Expansion cone for radially expanding tubular members |
| 07/18/2006 | US7077212 Method of hydraulically actuating and mechanically activating a downhole mechanical apparatus |
| 07/18/2006 | US7077211 Method of creating a casing in a borehole |
| 07/18/2006 | US7077206 Method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores |
| 07/18/2006 | CA2412385C A graphical method for designing the trajectory of a well bore |
| 07/18/2006 | CA2365310C Wellbore primary barrier and related systems |
| 07/18/2006 | CA2303623C Method and apparatus for forming an optimized window |
| 07/18/2006 | CA2277202C Device for trenchless replacement of underground pipe |
| 07/18/2006 | CA2253574C Multi-lateral wellbore systems and methods for forming same |
| 07/18/2006 | CA2161536C Drilling kick-off device |
| 07/18/2006 | CA2130818C Method for overburden drilling, casing shoe and casing tube for the method, and coupling element for the casing tubes |
| 07/13/2006 | WO2006074017A2 Floating head reaction turbine rotor with improved jet quality |
| 07/13/2006 | WO2006073813A1 Rechargeable powered stapler assembly |
| 07/13/2006 | WO2006072761A2 Downhole tool |
| 07/13/2006 | US20060153644 Longitudinal load varying device for elongate members |
| 07/13/2006 | US20060151211 Transmitting electric power into a bore hole |
| 07/13/2006 | US20060151182 Seal cup for a wellbore tool and method |
| 07/13/2006 | CA2593797A1 Downhole tool |
| 07/12/2006 | EP1246994B1 Assembly and method for locating lateral wellbores |
| 07/12/2006 | CN2795434Y Variable amplitude link rod mechanism of rotary digging and drilling machine movable arm |
| 07/12/2006 | CN1800581A Shield machine with water cutter device |
| 07/12/2006 | CN1800580A Shield mirror surface breaking process employing water cutter device |
| 07/12/2006 | CN1800576A Hydraulic underreamer and sections for use therein |
| 07/12/2006 | CN1800509A Device for knobby pushing and expanding spiral immersed tube stake and its engineering method |
| 07/12/2006 | CN1800508A Gradient pushing and enlarging device |
| 07/11/2006 | US7073595 Method and system for controlling pressure in a dual well system |
| 07/11/2006 | US7073593 Method of drilling and operating a subsea well |
| 07/11/2006 | CA2165017C Drilling system with downhole apparatus for transforming multiple dowhole sensor measurements into parameters of interest and for causing the drilling direction to change in response thereto |
| 07/06/2006 | WO2006070204A2 Improvements in or relating to a whipstock system |
| 07/06/2006 | WO2006053248A3 Method and apparatus for jet-fluid abrasive cutting |
| 07/06/2006 | US20060144623 Downhole tool |
| 07/06/2006 | US20060144621 Tool insert |
| 07/06/2006 | US20060144620 Wellbore consolidating tool for rotary drilling applications |
| 07/06/2006 | US20060144619 Thermal management apparatus, systems, and methods |
| 07/05/2006 | EP1534925B1 Combined casing expansion / casing while drilling method and apparatus |
| 07/05/2006 | CN2793321Y Flexible butt-jointed cable transferring device with hydraulic pump delivery for horizontal well |
| 07/05/2006 | CN2793306Y Recovered anchored tool of oblique apparatus for branched well |
| 07/05/2006 | CN2793305Y Fishing and delivering tool of guide cylinder for branched well |
| 07/05/2006 | CN2793304Y Guide cylinder recovering tool of branched well |
| 07/05/2006 | CN2793303Y Flexible-piping cavity maker |
| 07/05/2006 | CN2793300Y Rod transferring clipper of horizontal oriented driller |
| 07/05/2006 | CN2793291Y Drilling oblique device for branched well |
| 07/05/2006 | CN2793290Y Apparatus for laying pipeline underground by non drill boring |
| 07/05/2006 | CN2793289Y Branched tool for dropping double pipe under well |
| 07/05/2006 | CN2793288Y Branched double-pipe guider under well |
| 07/05/2006 | CN2793287Y Safety collision protector |
| 07/05/2006 | CN1798899A Drilling apparatus |
| 07/04/2006 | US7071695 Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal |
| 07/04/2006 | US7070359 Microtunneling systems and methods of use |
| 07/04/2006 | US7069862 Handheld tool for breaking up rock |
| 07/04/2006 | CA2236047C Deviated borehole drilling assembly |
| 07/04/2006 | CA2229487C Through-tubing lateral re-entry |
| 07/04/2006 | CA2170175C Steerable rotary drilling systems |
| 06/29/2006 | WO2006067248A1 Pit excavation method and device |
| 06/29/2006 | WO2006045134A8 Device for guiding and tensioning supply lines |
| 06/29/2006 | WO2006019977B1 Impact excavation system and method |
| 06/29/2006 | US20060137912 Method and apparatus for horizontal drilling and oil recovery |
| 06/29/2006 | US20060137911 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 06/29/2006 | US20060137909 Portable electrocrushing drill |
| 06/29/2006 | US20060137872 Method and device for intensifying the permeability of ground layers close to bore holes and filter bodies and filter layers in wells and other produciton wells |
| 06/29/2006 | US20060137196 Pitch sensing in drilling machines |
| 06/28/2006 | EP1674657A1 Method of building a tunnel |
| 06/28/2006 | CN2791238Y Flesible sand-fulshing tool special for horizontal well and oblique well for producing petroleum |
| 06/28/2006 | CN2791234Y Electric well-drilling machine |
| 06/28/2006 | CN1793598A Slant device capable of recovering and fishing tool thereof |
| 06/27/2006 | USRE39141 Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes |
| 06/27/2006 | US7066285 Method and composition for preventing or treating lost circulation |
| 06/27/2006 | US7066284 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 06/27/2006 | US7066283 Reverse circulation directional and horizontal drilling using concentric coil tubing |
| 06/27/2006 | US7066270 Multilateral reference point sleeve and method of orienting a tool |
| 06/27/2006 | US7066267 Downhole tubular splitter assembly and method |
| 06/27/2006 | CA2343190C Through-tubing retrievable whipstock system |
| 06/22/2006 | WO2006065155A1 Vibrational apparatus |
| 06/22/2006 | US20060132136 Bore location system |
| 06/22/2006 | US20060131078 Mobile chemical preparation plant and method of managing a chemical inventory thereon |