| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 02/26/2009 | US20090050373 Providing a rechargeable hydraulic accumulator in a wellbore |
| 02/26/2009 | US20090050372 Downhole Turbine |
| 02/25/2009 | CN201198736Y High wind pressure impacter |
| 02/24/2009 | US7493967 Tractor with improved valve system |
| 02/12/2009 | US20090038854 System and method for drilling wellbores |
| 02/11/2009 | CN101363307A Method and apparatus for directional boring under mixed conditions |
| 02/04/2009 | CN201190534Y Spiral stator for screw drill |
| 02/04/2009 | CN100458096C Fluid distributor device for down-hole-drills and impulse type dilling string combination |
| 01/29/2009 | WO2009015109A1 Technique and system for completing a well |
| 01/29/2009 | WO2008148613A3 Power transmission system for use with downhole equipment |
| 01/29/2009 | US20090025943 Lockable anchor for insertable progressing cavity pump |
| 01/28/2009 | CN201187254Y Plastic slide board of drill guide rail |
| 01/28/2009 | CN201187251Y Drill rod mechanism of open-air down-hole drill |
| 01/28/2009 | CN101356339A Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammer |
| 01/28/2009 | CN101353945A Non-drill rod boring tool |
| 01/27/2009 | US7481283 Wellbore motor having magnetic gear drive |
| 01/27/2009 | US7481281 Systems and methods for the drilling and completion of boreholes using a continuously variable transmission to control one or more system components |
| 01/27/2009 | CA2469023C Thrust control apparatus |
| 01/22/2009 | US20090020337 Downhole drilling tool |
| 01/21/2009 | CN201184128Y Blade self-start-up type downhole power drill tool |
| 01/20/2009 | CA2473496C Bi-directional thruster pig apparatus and method of utilizing same |
| 01/14/2009 | EP2013437A1 Seal assembly for use in a top drive |
| 01/14/2009 | EP1910640B1 A drill bit assembly for fluid-operated percussion drill tools |
| 01/08/2009 | US20090008152 Roller link toggle gripper and downhole tractor |
| 12/30/2008 | US7469751 Pneumatic hammer |
| 12/30/2008 | CA2185058C Tunnel boring machine |
| 12/25/2008 | US20080314639 Dual Tractor Drilling System |
| 12/23/2008 | US7467675 Device for channeling solids and fluids within a reverse circulation drill |
| 12/23/2008 | US7467674 Rock drilling equipment |
| 12/23/2008 | CA2455518C Tubing expansion |
| 12/18/2008 | WO2008153406A1 Liquid pressure driven sequential valve for axially operative jar |
| 12/18/2008 | US20080308318 Electrically powered tractor |
| 12/17/2008 | EP1545839A4 Sonic drill |
| 12/11/2008 | WO2008149098A2 Drilling apparatus with a pilot hole drilling assembly |
| 12/11/2008 | CA2696789A1 Drilling apparatus |
| 12/11/2008 | CA2685955A1 Power transmission system for use with downhole equipment |
| 12/10/2008 | CN201162768Y Long life screw drill transmission shaft bearing with cylindrical roller |
| 12/10/2008 | CN101319598A Hole bottom annular spacing strong suction device of through type down-the-hole hammer |
| 12/10/2008 | CN101319597A Hydrodynamic force motor type hard rock deep borehole drilling device |
| 12/09/2008 | US7461706 Drilling apparatus with percussive action cutter |
| 12/03/2008 | CN201159047Y Drill pipe |
| 11/27/2008 | WO2007115119B1 Jet motor |
| 11/26/2008 | CN201155303Y Tungsten alloy plating screw drilling tool |
| 11/20/2008 | WO2008138226A1 Screw energy converter |
| 11/19/2008 | CN201152142Y Latent punch |
| 11/19/2008 | CN101310088A Hammer drilling device with a pneumatic reversing gear |
| 11/19/2008 | CN101307674A Long life spiral transduction apparatus |
| 11/18/2008 | US7451835 Downhole turbine |
| 11/18/2008 | CA2631414A1 Safety net for a drill rig |
| 11/18/2008 | CA2420980C Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure |
| 11/13/2008 | WO2008104898A3 Well wall gripping element |
| 11/13/2008 | US20080277166 Downhole Drilling of a Lateral Hole |
| 11/11/2008 | US7448455 Turbodrill with asymmetric stator and rotor vanes |
| 11/06/2008 | WO2008131772A2 Drilling system with a barrel drilling head driven by a downhole tractor |
| 11/05/2008 | EP1988252A2 Locking clutch for downhole motor |
| 11/05/2008 | CN201144898Y Single-cylinder multilevel hydraulic pressurizer |
| 11/04/2008 | US7445061 Motor shaft security apparatus |
| 10/30/2008 | WO2008129237A1 Long reach spindle drive systems and method |
| 10/30/2008 | WO2008128543A2 Stroker tool |
| 10/30/2008 | WO2008128542A2 Anchor tool |
| 10/30/2008 | US20080264693 Drive System |
| 10/30/2008 | US20080264692 Locking clutch for downhole motor |
| 10/29/2008 | CN101297095A Extended reach drilling apparatus and method |
| 10/29/2008 | CN101294480A Device for drilling miniature borehole on ultra-short radius of coiled tubing |
| 10/23/2008 | WO2008127146A1 Screw downhole motor for slant-hole directional and horizontal drilling |
| 10/23/2008 | US20080257609 Pneumatically Reversible Ram Boring Device |
| 10/23/2008 | US20080257603 Telescopic Conductor Casing for a Well Installation and a Method of Driving Same into the Underground |
| 10/21/2008 | CA2471614C Apparatus for translating a rotary expander tool downhole |
| 10/14/2008 | US7434634 Downhole turbine |
| 10/14/2008 | US7434623 Percussion tool and method |
| 10/09/2008 | WO2007115119A3 Jet motor |
| 10/09/2008 | US20080246273 Positive Indication of Latching in an Inner and Outer Tube Assembly, Especially for Downhole Assemblies |
| 10/08/2008 | EP1977072A1 Do wn-the-hole hammer and components for a do wn-the-hole hammer, and a method of assembling a do wn-the-hole hammer |
| 10/07/2008 | CA2419914C Drill string telemetry system and method |
| 10/07/2008 | CA2311895C Progressive cavity motors using composite materials |
| 10/02/2008 | US20080236898 Rebar insertion tool |
| 10/02/2008 | US20080236894 Hydraulic Jar and an Overpressure Relief Mechanism Therefor |
| 10/02/2008 | DE102007015266A1 Lagerung für einen Turbinenrotor einer Bohrstrangturbine Storage for a turbine rotor of a Bohrstrangturbine |
| 09/30/2008 | CA2476787C Integrated magnetic ranging tool |
| 09/27/2008 | CA2619618A1 Bearing arrangement for a turbine rotor of a drill string turbine |
| 09/24/2008 | EP1971748A2 Wellbore motor having magnetic gear drive |
| 09/23/2008 | US7426965 Power transmission unit of an impactor, a hydraulic jet impactor and the application thereof |
| 09/23/2008 | CA2480259C Retrievable through tubing whipstock apparatus having fluid-responsive pivotal anchoring members |
| 09/18/2008 | US20080223616 Tractor with improved valve system |
| 09/17/2008 | CN101268247A A percussion hammer for enlarging drilled holes |
| 09/17/2008 | CN100419205C Constant force actuator |
| 09/16/2008 | CA2478373C Method and apparatus for one trip tubular expansion |
| 09/16/2008 | CA2428458C Hydraulic cam motor |
| 09/12/2008 | WO2008108917A1 Drilling apparatus and system for drilling wells |
| 09/12/2008 | WO2008107142A1 Drilling method and apparatus |
| 09/11/2008 | US20080217059 Tractor with improved valve system |
| 09/09/2008 | CA2509180C A frameless switched reluctance motor and application as a top drive for a rotary pump |
| 09/04/2008 | WO2008104898A2 Well wall gripping element |
| 09/04/2008 | WO2008104178A1 Drilling tool with feed control |
| 09/04/2008 | WO2008104177A1 Drilling tool with fluid cleaner |
| 09/04/2008 | CA2685062A1 Drilling tool with feed control |
| 09/04/2008 | CA2685061A1 Drilling tool with fluid cleaner |
| 09/03/2008 | CN100416039C Method and device for moving tube in borehole in ground |
| 09/02/2008 | US7419015 Rock drilling machine and axial bearing |
| 09/02/2008 | CA2389671C Device for manipulating a tool in a well tubular |