| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
|---|
| 12/22/2009 | US7635224 Method of adjusting backlash in a down hole bearing assembly |
| 12/22/2009 | US7635022 Pumping system |
| 12/17/2009 | WO2009151608A1 Downhole motor |
| 12/17/2009 | US20090308661 Exhaust valve and bit assembly for down-hole percussive drills |
| 12/17/2009 | US20090308588 Method and Apparatus for Exposing a Servicing Apparatus to Multiple Formation Zones |
| 12/17/2009 | CA2727382A1 Downhole motor |
| 12/16/2009 | EP2132398A1 Drilling device for drilling and reaming of a hole |
| 12/15/2009 | CA2467426C Fluid distributor device for down-hole drills |
| 12/15/2009 | CA2405533C Flexible hose with thrusters for horizontal well drilling |
| 12/10/2009 | WO2009148376A1 Device and method for sensing a parameter related to a position of a displaceable element in a rock drill |
| 12/10/2009 | WO2009148322A1 Rock drilling device |
| 12/10/2009 | US20090301779 Earth boring device |
| 12/10/2009 | US20090301745 Mechanical trigger arrangement |
| 12/09/2009 | EP2129858A1 Drilling tool with feed control |
| 12/09/2009 | CN101598002A Door frame type drilling machine |
| 12/09/2009 | CN100567694C Device for drilling a bore in the ground |
| 12/01/2009 | US7624819 Universal joint assembly |
| 12/01/2009 | US7624795 Bottom mount auxiliary pumping system seal section |
| 12/01/2009 | CA2578828C Torque transmitting coupling |
| 11/25/2009 | EP2122106A1 Drilling tool with fluid cleaner |
| 11/25/2009 | CN201351493Y Gyrator for crawler type down-hole drill jumbo |
| 11/25/2009 | CN201351490Y Throttle control device for down-the-hole drill |
| 11/19/2009 | WO2009139825A2 An arrangement and a method for monitoring an air flow in a drill rig |
| 11/19/2009 | WO2009139658A1 Progressive cavity hydraulic machine |
| 11/19/2009 | CA2719121A1 Progressive cavity hydraulic machine |
| 11/18/2009 | CN101581196A Impacting helicoid hydraulic motor and transmission shaft assembly |
| 11/17/2009 | US7617889 Backhead and drill assembly with backhead |
| 11/12/2009 | WO2009111690A3 Internally dampened percussion rock drill |
| 11/12/2009 | US20090277690 Drilling jar |
| 11/12/2009 | US20090277687 Electro-mechanical thruster |
| 11/11/2009 | CN101575941A Valveless single-cylinder low or middle wind pressure downhole air hammer |
| 11/05/2009 | WO2009135120A2 Thrust bearing assembly |
| 11/05/2009 | WO2009132414A1 Drive shaft assembly for a downhole motor |
| 11/05/2009 | US20090272581 Load distribution for multi-stage thrust bearings |
| 11/05/2009 | US20090272578 Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| 11/05/2009 | CA2722684A1 Thrust bearing assembly |
| 11/04/2009 | EP2113632A1 Attachment device for forming a fluid supply |
| 11/03/2009 | CA2665298A1 Pneumatic impact tool |
| 10/30/2009 | CA2665013A1 Load distribution for multi-stage thrust bearings |
| 10/29/2009 | WO2009102218A3 Method and device for position control of a working organ of a down-hole actuator |
| 10/27/2009 | US7607497 Roller link toggle gripper and downhole tractor |
| 10/27/2009 | US7607495 Tractor with improved valve system |
| 10/22/2009 | WO2009127831A2 Drill motor assembly |
| 10/22/2009 | US20090260889 Backhead and drill assembly with backhead |
| 10/21/2009 | CN201330559Y Pneumatic down-hole hammer wind-pressure drilling device |
| 10/20/2009 | US7604060 Gripper assembly for downhole tools |
| 10/15/2009 | WO2009126429A2 Kinetic energy harvesting in a drill string |
| 10/15/2009 | WO2009082453A3 Pulse rate of penetration enhancement device and method |
| 10/08/2009 | WO2009088769A3 Vibratory unit for drilling systems |
| 10/08/2009 | US20090250265 Impact powered transmitter for directional drilling |
| 10/07/2009 | EP2106493A1 Device for transport of tools in wellbores and pipelines |
| 10/07/2009 | CN101550805A Abrasion resistant drilling tool plated with diamond layer and manufacturing technology thereof |
| 10/06/2009 | CA2534956C Bearing arrangement |
| 10/06/2009 | CA2430003C Hydraulic drill string accumulator |
| 10/06/2009 | CA2392451C Downhole device |
| 09/30/2009 | CN101545356A Downhole drill head |
| 09/29/2009 | US7594551 Downhole supercharger process |
| 09/29/2009 | CA2351270C Drilling method and measurement-while-drilling apparatus and shock tool |
| 09/24/2009 | WO2009115819A1 Stator for use in helicoidal motor |
| 09/24/2009 | WO2009086280A3 Reamer with improved hydraulics for use in a wellbore |
| 09/24/2009 | US20090236149 Downhole generator for drillstring instruments |
| 09/24/2009 | US20090236148 Flow Guide Actuation |
| 09/24/2009 | CA2755500A1 Stator for use in helicoidal motor |
| 09/23/2009 | EP2102419A2 Drill head for the excavation in the ground of a pit, and a foundation system for the forming of a foundation pile in the ground |
| 09/22/2009 | CA2535687C Progressing cavity stator including at least one cast longitudinal section |
| 09/17/2009 | US20090229883 Flow Guide Actuation |
| 09/17/2009 | US20090229814 Actuatable subsurface safety valve and method |
| 09/16/2009 | CN100540945C Chain drive system |
| 09/16/2009 | CN100540838C Angle and reactive torque control device for a cycloid type motor provided with a spindle and drilling bit in a bended drill string |
| 09/16/2009 | CN100540190C Ejection mechanism of battery set and electric tool |
| 09/11/2009 | WO2009111690A2 Internally dampened percussion rock drill |
| 09/11/2009 | WO2009110847A1 A horizontal directional drilling system |
| 09/11/2009 | CA2716909A1 A horizontal directional drilling system |
| 09/11/2009 | CA2716775A1 Internally dampened percussion rock drill |
| 09/10/2009 | US20090223720 Internally dampened percussion rock drill |
| 09/10/2009 | US20090223676 Selective Agitation |
| 09/09/2009 | EP2097609A1 Coiled tubing tractor assembly |
| 09/09/2009 | EP2097608A1 Hydraulically driven tractor |
| 09/09/2009 | EP2013437B1 Seal assembly for use in a top drive |
| 09/09/2009 | CN101529044A Air actuated down- the -hole hammer and drill bit and foot valve for use in the hammer |
| 09/09/2009 | CN101525979A Device for eliminating net torque of bit and controlling bit walk |
| 09/02/2009 | CN201301664Y Down-the-hole hammer |
| 09/01/2009 | US7581602 Downhole hammer drill |
| 08/27/2009 | CA2715497A1 Wellsite systems utilizing deployable structure |
| 08/26/2009 | CN201297129Y Automatic well hydraulic pressure vibration reduction bit-feeding device |
| 08/20/2009 | US20090205869 Method and system of monitoring rotational time of rotatable equipment |
| 08/13/2009 | WO2009100378A1 Methods and apparatus for drilling directional wells by percussion method |
| 08/13/2009 | WO2009098549A1 Method and device for manufacturing a down hole motor radial bearing |
| 08/13/2009 | US20090200082 Methods and apparatus for drilling directional wells by percussion method |
| 08/13/2009 | US20090200078 Method of drilling a well at or under balance using a electrical submersible pump |
| 08/13/2009 | DE10034471B4 Rammbohrgerät Ram boring machine |
| 08/13/2009 | CA2715249A1 Methods and apparatus for drilling directional wells by percussion method |
| 08/13/2009 | CA2715041A1 Method and device for manufacturing a down hole motor radial bearing |
| 08/12/2009 | CN100526594C Driller capable of diving in well |
| 08/06/2009 | WO2009073341A3 Apparatus and method for a hydraulic diaphragm downhole mud motor |
| 08/06/2009 | US20090194338 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 08/06/2009 | US20090194336 Damping and Drilling Machine Including Such a Damping Device |
| 08/06/2009 | DE102008006768A1 Vertical insertion device for ground probe into ground, has pressure hoses arranged in guidance hose for subjecting ram with compressed air and/or hydraulic oil, and head with diameter larger than diameter of guidance hose |
| 08/05/2009 | EP2085570A2 Method for jarring with a downhole pulling tool |
| 08/05/2009 | CN201283912Y Down-hole drill driver's cab |