| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 03/21/2013 | CA2847094A1 Multi-scheme downhole tool bus system and methods |
| 03/20/2013 | CN202810647U Double concentric drill gyrator |
| 03/20/2013 | CN102168523B Main driving and speed-changing system of drilling machine as well as operating mechanism of the drilling machine |
| 03/20/2013 | CN101906935B Universal shaft of underground motor |
| 03/19/2013 | US8397839 Self-indexing down-the-hole drill |
| 03/19/2013 | US8397830 Electric stapler and method adapted for electric stapler to adjust staple leg length |
| 03/19/2013 | US8397822 Multiphase conductor shoe for use with electrical submersible pump |
| 03/14/2013 | WO2013036516A2 Downhole motors and pumps with asymmetric lobes |
| 03/14/2013 | WO2012178041A3 Fluid migration shut-off |
| 03/14/2013 | WO2012103318A3 Oil-sealed mud motor bearing assembly with mud-lubricated off-bottom thrust bearing |
| 03/13/2013 | CN202798207U Corrosion-resistant positive displacement motor (PDM) drill |
| 03/13/2013 | CN202788610U Down-hole hammer sleeve follow-up drilling machine |
| 03/13/2013 | CN202788609U Screw drill tool with high wear resistance |
| 03/13/2013 | CN202788608U Electric down-the-hole device for mining |
| 03/13/2013 | CN202788607U Rock drilling key action double-pump hydraulic control loop for cutting drill |
| 03/13/2013 | CN202788606U Fast advancing hydraulic control loop for down-the-hole drill |
| 03/13/2013 | CN202788605U Driving shaft device of drilling machine rotary water supply |
| 03/13/2013 | CN202788604U Drive shaft assembly of positive displacement motor |
| 03/13/2013 | CN202788603U Lower chuck of core drill gyrator |
| 03/13/2013 | CN102971481A Annulus ring hole drill |
| 03/13/2013 | CN102966305A Near-bit circumferential resonance impacter |
| 03/13/2013 | CN102966304A Mud retaining wall and air down-the-hole hammer drilling tool and drilling technology |
| 03/13/2013 | CN101949261B Combined down-the-hole hammer and construction method thereof |
| 03/07/2013 | WO2013032616A2 Downhole motors and pumps with improved stators and methods of making and using same |
| 03/07/2013 | WO2013029524A1 Rotating magnetic field downhole power generation device |
| 03/07/2013 | US20130056279 Rock drilling rig and method for downhill drive |
| 03/07/2013 | US20130056276 System and Method for Conducting Drilling and Coring Operations |
| 03/07/2013 | CA2849814A1 Downhole rotating magnetic field generator |
| 03/06/2013 | CN202767875U Drilling machine control system component |
| 03/06/2013 | CN202767872U Hydraulic anchor drill of workover rig |
| 03/06/2013 | CN102953678A Valveless single cylinder blind hole channel down-hole hammer |
| 02/28/2013 | WO2013028078A1 High frequency fluid driven drill hammer percussion drilling in hard formations |
| 02/28/2013 | US20130048386 Pulsing tool |
| 02/28/2013 | US20130048384 Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps |
| 02/28/2013 | CA2845789A1 High frequency fluidpressure driven drill hammer for percussion drilling in hard formations |
| 02/27/2013 | CN202755891U Diving rock inserting drill rig |
| 02/27/2013 | CN202755890U Walking type double circling downhole drill |
| 02/27/2013 | CN202755888U Split type impact hammer |
| 02/27/2013 | CN102943626A Impact rotary-cut drill bit and rock-entering drilling machine using same |
| 02/27/2013 | CN102943619A Grid electricity drilling machine applicable to deep drilling |
| 02/27/2013 | CN102943466A Construction method for miniature steel pipe concrete pile to penetrate through roadbed layer for reinforcing soft foundation construction |
| 02/26/2013 | US8381839 Apparatus for directional drilling |
| 02/26/2013 | CA2556795C A drill bit |
| 02/21/2013 | WO2012122321A3 Bearing / gearing section for a pdm rotor / stator |
| 02/21/2013 | US20130043076 Rotary Steerable Assembly Inhibiting Counterclockwise Whirl During Directional Drilling |
| 02/21/2013 | US20130043075 Drilling apparatus and method |
| 02/20/2013 | CN202745777U Small electric geological core drilling machine |
| 02/20/2013 | CN202745694U Rotary hot melting drill bit |
| 02/20/2013 | CN202745685U 供水可调风锤 Water adjustable air hammer |
| 02/20/2013 | CN102936999A Power device of drilling tool |
| 02/14/2013 | US20130037328 Bearing assembly including at least one superhard bearing element having at least one registration feature and bearing apparatus including same |
| 02/13/2013 | CN202731741U Submersible pump type pneumatic DTH (Down-the-hole) hammer reverse circulation drilling machine |
| 02/13/2013 | CN102926663A Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
| 02/13/2013 | CN102926656A Vertical shaft type drilling machine capable of mechanically unscrewing drill rod |
| 02/12/2013 | US8371397 Feed mechanism for drilling systems |
| 02/07/2013 | WO2012021273A3 Bearing assembly including bearing support ring configured to reduce thermal warping during use. bearing apparatuses using the same, and related methods |
| 02/07/2013 | CA2839804A1 Drilling tool for laying a tube in the ground |
| 02/06/2013 | CN202718623U Key drilling action single-pump hydraulic control loop of cutting drilling machine |
| 02/06/2013 | CN202718622U Hydraulic pressurizer |
| 02/06/2013 | CN102913149A Rotary drilling rig and two-channel hydraulic power transmission elevator thereof |
| 02/06/2013 | CN102913131A Dynamic point-the-bit rotary steering drilling tool |
| 02/06/2013 | CN102913126A Hydro-percussive hammer |
| 02/06/2013 | CN102913125A Hydraulic pressurizer with long telescopic distance |
| 02/05/2013 | CA2646326C Jet motor and method for providing rotation in a downhole tool |
| 01/31/2013 | WO2013016471A1 System and method for enhancing hydraulic fluids for down hole use |
| 01/31/2013 | WO2013015992A2 Selective hydraulic fracturing tool and method thereof |
| 01/31/2013 | WO2012170122A3 Modular control system for downhole tool |
| 01/31/2013 | WO2012020058A3 An attachment for percussion drill tools |
| 01/31/2013 | US20130025936 Ground-drilling device |
| 01/31/2013 | CA2841078A1 Selective hydraulic fracturing tool and method thereof |
| 01/30/2013 | CN202706910U Rotor for drilling rig used in oil drilling |
| 01/30/2013 | CN202706909U Bearing device and electrical machine assembly used in hole-drilling system |
| 01/30/2013 | CN202706905U Double drill deeply-planted afforestation drilling machine |
| 01/29/2013 | CA2519019C Method and apparatus for drilling a borehole with a borehole liner |
| 01/24/2013 | WO2013012488A2 Downhole motors with a lubricating unit for lubricating the stator and rotor |
| 01/24/2013 | WO2012007756A3 Two-port percussion mole |
| 01/24/2013 | US20130020132 Downhole Motors with a Lubricating Unit for Lubricating the Stator and Rotor |
| 01/23/2013 | CN202689925U Anti-idle-punching system of hydraulic drilling jumbo |
| 01/23/2013 | CN101824964B Downhole drill of intelligent underground multi-branch horizontal drilling completion system |
| 01/23/2013 | CN101775959B Drilling machine of coaxial double-drill large-caliber multifunctional foundation pile |
| 01/22/2013 | CA2525331C Pneumatic ground piercing tool |
| 01/17/2013 | WO2013009796A2 Downhole motor with diamond-like carbon coating on stator and/or rotor |
| 01/17/2013 | WO2013009312A1 Methods and systems for controlling torque transfer from rotating equipment |
| 01/17/2013 | US20130014995 Downhole Motor with Diamond-Like Carbon Coating on Stator and/or Rotor |
| 01/17/2013 | CA2841254A1 Methods and systems for controlling torque transfer from rotating equipment |
| 01/16/2013 | CN202673161U Drilling machine with universal rotating disk device used for coal mine underground |
| 01/16/2013 | CN202673139U Low-speed and high-torque radial plunger type hydraulic motor with cooling water fed in center |
| 01/15/2013 | US8353336 Power transmission system for use with downhole equipment |
| 01/10/2013 | WO2012138383A3 Drilling motor valve and method of using same |
| 01/10/2013 | US20130008682 Battery for a power tool |
| 01/10/2013 | DE112011101162T5 Geschrämter Stator für einen Verdrängungsmotor Geschrämter stator for a positive displacement motor |
| 01/08/2013 | US8347988 Down-hole hammer drill |
| 01/03/2013 | WO2013000938A1 Downhole tool for determining laterals |
| 01/03/2013 | WO2013000024A1 Fluid drilling head with powered swivel assembly |
| 01/03/2013 | WO2012109109A3 Multiple motor/pump array |
| 01/03/2013 | US20130000987 Steerable ground piercing tools |
| 01/03/2013 | US20130000986 Drilling motors with elastically deformable lobes |
| 01/03/2013 | CA2840471A1 Downhole tool for determining laterals |
| 01/02/2013 | EP2540957A1 Downhole tool for determining laterals |
| 01/02/2013 | CN202645434U Eccentric simultaneous casing drilling tool for expanding holes through rotation |