| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 10/16/2013 | CN203239229U Static and dynamic composite load type hydraulic propeller |
| 10/16/2013 | CN103352657A 矩形孔钻机 Rectangular hole drilling rig |
| 10/15/2013 | US8555963 Gripper assembly for downhole tools |
| 10/10/2013 | WO2013151657A1 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 10/10/2013 | WO2013151477A1 Apparatus for drilling and lining a borehole |
| 10/10/2013 | CA2845586A1 Injection of fluid into selected ones of multiple zones with well tools selectively responsive to magnetic patterns |
| 10/09/2013 | CN103343664A Hydraulic shock slewing drilling machine |
| 10/03/2013 | WO2013148465A1 Bearing assemblies, apparatuses, and motor assemblies using the same |
| 10/03/2013 | WO2013143520A1 Valve |
| 10/03/2013 | WO2013106011A3 Downhole oscillator |
| 10/02/2013 | EP2643541A1 Submersible progressive cavity pump driver |
| 10/02/2013 | DE102012012297A1 Ventil Valve |
| 10/02/2013 | CN103334694A Hydraulic down-hole hammer |
| 10/02/2013 | CN103334693A Down-hole hammer piston and machining process thereof |
| 10/02/2013 | CN103334692A Pore-forming machine provided with double gears |
| 10/02/2013 | CN101656438B Screw drilling tool motor stator |
| 10/01/2013 | US8544566 Fluid actuated impact tool with solid piston-standard bit arrangement and water seal |
| 10/01/2013 | US8544560 Drive mechanism |
| 09/25/2013 | EP2640921A2 Apparatus and method for controlling or limiting rotor orbit in moving cavity motors and pumps, such as mud motors |
| 09/25/2013 | CN203214836U Injection type sealing structure for particle-containing medium and raise boring machine containing sealing structure |
| 09/25/2013 | CN203213986U Novel dustproof drilling rig for opencast coal mine |
| 09/25/2013 | CN203213954U Downhole drilling device for bore piling work |
| 09/25/2013 | CN103321569A Cam type high-frequency percussion well drilling tool |
| 09/25/2013 | CN103321568A Long-service-life high-performance screw drill |
| 09/25/2013 | CN102322058B Construction process and equipment for downhole impacting high-pressure jet grouting pile |
| 09/24/2013 | US8540021 Release assembly for a downhole tool string and method for use thereof |
| 09/18/2013 | CN203201472U Rock drilling machine and rotary-cut percussion drilling system thereof |
| 09/18/2013 | CN203201460U Binding type down-the-hole hammer |
| 09/18/2013 | CN203201459U Drilling assembly of engineering driller |
| 09/18/2013 | CN103306600A Cam-type axial rotary punching tool |
| 09/18/2013 | CN103306599A Piston with guidance port and down-hole hammer prepared thereby |
| 09/17/2013 | US8534378 Transmission, in particular for electric hand-held power tools |
| 09/17/2013 | CA2716775C Internally dampened percussion rock drill |
| 09/17/2013 | CA2706590C Drilling system |
| 09/12/2013 | WO2013133796A1 Deactivation of packer with safety joint |
| 09/12/2013 | WO2013133795A1 Safety joint with non-rotational actuation |
| 09/12/2013 | WO2012143807A4 Downhole assembly with magnetic gearbox |
| 09/12/2013 | WO2012094460A4 Pressure compensation system for an oil-sealed mud motor bearing assembly |
| 09/12/2013 | US20130233626 Pressurized fluid flow system for a reverse circulation down-the-hole hammer and hammer thereof |
| 09/12/2013 | US20130233547 Subsea casing drilling system |
| 09/11/2013 | CN203188908U Integrated ground source heat hole power excavating device |
| 09/11/2013 | CN203188212U Rock-socketed pre-stress tubular pile capable of being embedded through spinning and drilling |
| 09/11/2013 | CN103299019A Apparatus and method for controlling or limiting rotor orbit in moving cavity motors or pumps, such as mud motors |
| 09/11/2013 | CN103291214A Reciprocating type hydraulic-drive impacter |
| 09/11/2013 | CN103291213A Water pressure torsional impact device for well drilling |
| 09/06/2013 | WO2013130527A1 Apparatus and method for determining inner profiles of hollow devices |
| 09/06/2013 | WO2013129938A1 Feeding device for a downhole tool and method for axial feeding of a downhole tool |
| 09/05/2013 | US20130228381 Wired or Ported Universal Joint for Downhole Drilling Motor |
| 09/05/2013 | US20130228373 Apparatus Including Load Driven By a Motor Coupled to an Alternator |
| 09/04/2013 | EP2634362A2 Wired or ported universal joint for downhole drilling motor |
| 09/04/2013 | EP2633147A2 Direct drill bit drive for tools on the basis of a heat engine |
| 09/04/2013 | CN203175394U Engineering drilling machine capable of carrying out ultra-flow state concrete pressing-and-filling pile construction on hard rock stratum |
| 09/04/2013 | CN103277043A Efficient medium-low-pressure down-hole hammer |
| 09/03/2013 | CA2805990A1 Wired or ported universal joint for dowhole drilling motor |
| 08/29/2013 | WO2013126827A2 Latch assembly |
| 08/29/2013 | WO2013126822A2 Subsea casing drilling system |
| 08/29/2013 | WO2013126546A1 Fiber reinforced elastomeric stator |
| 08/29/2013 | US20130220702 Fluid Conveyed Thruster |
| 08/29/2013 | US20130220656 Direct drill bit drive for tools on the basis of a heat engine |
| 08/28/2013 | CN203161079U Head bearing rear end locating mechanism of downhole drill |
| 08/28/2013 | CN203161078U Self-pressurization well drill |
| 08/28/2013 | CN203161076U Pile foundation drilling machine with ultra-large aperture |
| 08/22/2013 | WO2013123221A1 Drill rig moving system |
| 08/21/2013 | EP2627850A2 A down-the-hole hammer |
| 08/21/2013 | CN203145828U Drilling machine power transmission device |
| 08/21/2013 | CN203145825U Oversized-aperture pile foundation drilling machine |
| 08/20/2013 | US8511403 Steerable ground piercing tools |
| 08/20/2013 | CA2766159C Sealing system and bi-directional thrust bearing arrangement for a downhole motor |
| 08/20/2013 | CA2572779C System and method for drilling wellbores |
| 08/15/2013 | WO2012055036A8 Submersible progressive cavity pump driver |
| 08/15/2013 | US20130206481 Method and apparatus for controlling the operation of cluster drill of down-the-hole hammers |
| 08/15/2013 | US20130206387 Communicating power and data to a component in a well |
| 08/14/2013 | EP2626505A2 Method and apparatus for controlling the operation of cluster drill of DTH hammers |
| 08/14/2013 | CN203129947U Down-the-hole drill |
| 08/14/2013 | CN203129132U Pneumatic rapid pore-forming composite pile |
| 08/14/2013 | CN103244052A Hydraulic hammer rod type impact drilling tool |
| 08/14/2013 | CN103244051A Combined down-hole hammer drilling tool and pile forming construction method thereof |
| 08/14/2013 | CN103243712A Caterpillar end-expanded filling pile with pneumatic down-the-hole hammer and quick construction method of caterpillar end-expanded filling pile |
| 08/14/2013 | CN102409979B Stone-crushing drill bit |
| 08/14/2013 | CN102268961B Screw drill transmission shaft assembly with vibration reduction function |
| 08/14/2013 | CN101918672B Drilling system |
| 08/13/2013 | US8505653 Downhole apparatus |
| 08/08/2013 | US20130199846 Motor saver sub for down hole drilling assemblies |
| 08/07/2013 | EP2623705A1 Combined down-the-hole hammer |
| 08/07/2013 | CN203114170U In-hole hammer drilling embedding rock-socketed prestressed pipe pile device |
| 08/07/2013 | CN203114165U Cyclone band tail pipe high wind pressure down-hole hammer |
| 08/07/2013 | CN203114164U Medium-low wind pressure down hole hammer |
| 08/07/2013 | CN203114163U Reduction gear used in down-hole drill gyrator |
| 08/07/2013 | CN203114162U Anti-trip anti-well-falling screw rod drilling tool |
| 08/06/2013 | CA2710783C Pump drive head with stuffing box |
| 08/01/2013 | WO2012094460A3 Pressure compensation system for an oil-sealed mud motor bearing assembly |
| 08/01/2013 | US20130192899 Tilting pad bearing apparatuses and motor assemblies using the same |
| 08/01/2013 | US20130192821 Monitoring fiber for a machine and method of installation |
| 07/31/2013 | EP2619413A1 Method and device for monitoring down-the-hole percussion drilling |
| 07/31/2013 | CN203097720U Concentric slide block simultaneous casing drilling tool, central drill bit and centralizer |
| 07/31/2013 | CN203097713U Rodless cylinder drawn by steel wire ropes |
| 07/31/2013 | CN203097710U Sealing device for joint |
| 07/31/2013 | CN203097709U Screw drill drive shaft assembly |
| 07/31/2013 | CN203097708U Anti-fall device for transmission shaft of screw drill |
| 07/31/2013 | CN103228859A A down-the-hole hammer |