| Patents for E21B 4 - Drives for drilling, used in the borehole (6,032) |
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| 04/12/2012 | WO2012047562A2 Welded downhole components and method of forming same |
| 04/12/2012 | US20120085584 Control System, Rock Drill Rig And Control Method |
| 04/11/2012 | CN202187710U 无阀单缸型盲孔道潜孔冲击器 No valve single-cylinder type blind bore DTH hammer |
| 04/11/2012 | CN102409979A Stone-crushing drill bit |
| 04/11/2012 | CN102409971A 地下挖掘用挖掘装置、旋转式挖掘机和地下挖掘方法 Underground digging and digging, rotary excavator and underground mining methods |
| 04/11/2012 | CN102409970A 一种组合式潜孔锤孔口装置 A modular DTH orifice device |
| 04/10/2012 | US8151910 Drilling jar |
| 04/10/2012 | US8151908 Jet motor for providing rotation in a downhole tool |
| 04/10/2012 | US8151907 Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| 04/10/2012 | US8151902 Slickline conveyed bottom hole assembly with tractor |
| 04/05/2012 | WO2012041084A1 Combined down-the-hole hammer |
| 04/04/2012 | CN202181844U 一种与工程机械配套的全液压潜孔钻机 One kind of construction machinery and hydraulic submersible drilling rig |
| 04/04/2012 | CN102400642A 高压喷射灌浆用钻孔旋摆动力头 Jet grouting drilling Swing with power head |
| 04/03/2012 | US8146679 Valve-controlled downhole motor |
| 03/29/2012 | WO2012039666A1 Method and device for monitoring down-the-hole percussion drilling |
| 03/29/2012 | WO2012039630A1 Hybrid drill bit |
| 03/29/2012 | US20120073878 Down hole apparatus for generating a pusling action |
| 03/29/2012 | CA2809004A1 Method and device for monitoring down-the-hole percussion drilling |
| 03/28/2012 | CN202178619U Screw drilling tool stator filler with ball |
| 03/28/2012 | CN202176260U 七轴石油钻机并车传动链条箱 Seven vehicle drive axle oil rigs and chain box |
| 03/28/2012 | CN102395839A Percussion mole |
| 03/28/2012 | CN102392597A Electromechanical integration large-aperture drilling device |
| 03/27/2012 | US8141663 Down hole hammer having elevated exhaust |
| 03/27/2012 | US8141660 Excavator apparatus for underground excavation |
| 03/22/2012 | US20120067643 Two-phase isolation methods and systems for controlled drilling |
| 03/21/2012 | EP2430324A1 Bearing assembly including at least one superhard bearing element having at least one registration feature, bearing apparatus including same, and methods for making same |
| 03/21/2012 | EP2069602B1 Percussion device and rock drilling machine |
| 03/21/2012 | CN102386693A Rubber interlayer metal stator screw |
| 03/21/2012 | CN102386692A Ball filling screw drill stator and processing technology |
| 03/21/2012 | CN102383726A Drill for central casing drill of air down-the-hole hammer |
| 03/15/2012 | US20120061145 Method and apparatus for drilling large-diameter hole in ground |
| 03/15/2012 | US20120061142 Drilling apparatus |
| 03/15/2012 | US20120061074 Gripper assembly for downhole tools |
| 03/14/2012 | CN202165017U 金刚石复合齿 Diamond composite tooth |
| 03/14/2012 | CN202165008U 用于水平定向钻机动力传动装置上的液压系统 Hydraulic systems on the horizontal directional drilling power transmission unit |
| 03/14/2012 | CN102373883A Diving rock inserting drill rig |
| 03/13/2012 | CA2509079C System for use in a bore hole for axially coupling a tubular end and a mandrel, and a connecting assembly for such a system |
| 03/07/2012 | CN202157745U 一种具有减振功能的螺杆钻具传动轴总成 Screw having a damping function drill shaft assembly |
| 03/06/2012 | US8127864 Hydro-percussive mechanisms for drilling systems |
| 03/01/2012 | US20120048619 System, method and apparatus for drilling agitator |
| 03/01/2012 | DE102008028997B4 Bohrverfahren und Bohrgerät zur Herstellung eines Bohrlochs in Erde und Gestein Drilling method and drill for the preparation of a borehole in soil and rock |
| 02/29/2012 | EP2422037A1 Stroker device |
| 02/29/2012 | CN202152633U 一种履带式自行全液压深孔潜孔钻机 Tracked self-propelled hydraulic deep submersible drilling rig |
| 02/29/2012 | CN202152631U 一种具有压力补偿功能的油密封螺杆钻具传动轴总成 Oil seal screw having a pressure compensation drill shaft assembly |
| 02/29/2012 | CN102364028A Multifunctional full-hydraulic drilling machine |
| 02/29/2012 | CN102364027A Coning type hydraulic life-saving hole drill in mining life-saving capsule |
| 02/23/2012 | US20120043134 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 02/22/2012 | CN102362046A Hydraulic control system for drilling systems |
| 02/22/2012 | CN102362044A Coated oil and gas well production devices |
| 02/21/2012 | US8118117 Thrust bearing assembly |
| 02/21/2012 | US8118113 Hydraulic control system for drilling systems |
| 02/21/2012 | CA2481135C Motor protector |
| 02/16/2012 | WO2012021273A2 Bearing assembly including bearing support ring configured to reduce thermal warping during use. bearing apparatuses using the same, and related methods |
| 02/16/2012 | US20120039673 Arrangement for a down-the-hole hammer drill for use in soil consolidation through jet grouting |
| 02/16/2012 | CA2808086A1 Bearing assemblies including bearing support ring configured to reduce thermal warping during use, bearing apparatuses using the same, and related methods |
| 02/16/2012 | CA2806986A1 An attachment for percussion drill tools |
| 02/08/2012 | CN202140018U 旋扭钻井锤 Knob hammer drilling |
| 02/08/2012 | CN102345712A Reverser |
| 02/07/2012 | US8109348 Down-the-hole hammer drill |
| 02/07/2012 | CA2573375C Closed loop control bore hole drilling system |
| 02/01/2012 | EP2411626A2 Hydraulic control system for drilling systems |
| 01/26/2012 | US20120018228 Method and Apparatus for Transforming a Pressure Drop into a Continuous Fluid Flow |
| 01/26/2012 | US20120018227 Components and motors for downhole tools and methods of applying hardfacing to surfaces thereof |
| 01/25/2012 | CN202125247U Fully-electric composite continuous pipe drilling device |
| 01/24/2012 | CA2659541C Impulse rotor generator |
| 01/24/2012 | CA2587884C Modular drilling apparatus with power and/or data transmission |
| 01/24/2012 | CA2529135C System and method for transmitting electric power into a bore hole |
| 01/19/2012 | WO2012007756A2 Two-port percussion mole |
| 01/19/2012 | WO2011149363A4 Enhanced vibrational or hammering apparatus |
| 01/19/2012 | US20120012396 Steerable drilling system |
| 01/19/2012 | US20120012337 Crawler System for an Earth Boring System |
| 01/19/2012 | CA2804896A1 Two-port percussion mole |
| 01/18/2012 | EP2406455A1 Bearing assembly for a downhole motor |
| 01/18/2012 | CN202117559U Linear impact hammer |
| 01/18/2012 | CN102322058A Construction process and equipment for downhole impacting high-pressure jet grouting pile |
| 01/18/2012 | CN102134965B Long positioned drill hole drilling tool for extracting gas from coal seam roof and construction method thereof |
| 01/12/2012 | US20120006598 Down-the-Hole Drill Hammer Having a Sliding Exhaust Check Valve |
| 01/11/2012 | EP1948900B1 Earth drilling device |
| 01/11/2012 | CN102317565A Down hole hammer having elevated exhaust |
| 01/11/2012 | CN101581196B Impacting helicoid hydraulic motor and transmission shaft assembly |
| 01/11/2012 | CN101484657B Excavator for underground excavating, rotary excavator and underground excavating method |
| 01/05/2012 | WO2012002939A1 Angled bearing assembly |
| 01/05/2012 | WO2011130123A3 Anchor system and method for anchoring a tool with a positional bias |
| 01/04/2012 | EP2401463A2 Bearing apparatuses, systems including same, and related methods |
| 01/04/2012 | CN202100195U Minute borehole system for ultra-short radius side drill of continuous oil pipe |
| 01/04/2012 | CN202100191U Screw drilling rig transmission shaft bearing structure protected by double end-face mechanical seals |
| 01/04/2012 | CN102305068A Development machine |
| 01/03/2012 | USRE43054 Method and apparatus for casing exit system using coiled tubing |
| 01/03/2012 | CA2663004C Method and apparatus to vibrate a downhole component |
| 01/03/2012 | CA2531531C Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device |
| 01/03/2012 | CA2474998C Well system |
| 01/03/2012 | CA2466939C An improved transmission sleeve |
| 12/29/2011 | US20110315451 Drive system for a downhole tool |
| 12/28/2011 | EP2398994A1 Coated oil and gas well production devices |
| 12/28/2011 | CN102301073A 用于通过喷射灌浆来用于土壤固结中的潜孔锤钻的装置 By jet grouting to be used for soil consolidation in DTH drilling equipment |
| 12/28/2011 | CN102296928A 一种油密封腔压力平衡螺杆钻具传动轴总成 An oil seal chamber pressure balance screw drill shaft assembly |
| 12/27/2011 | US8083010 Drilling device for drilling and reaming of a hole |
| 12/22/2011 | WO2011129958A3 Reverse circulation hammer with modular bit |
| 12/22/2011 | WO2011126881A3 Undercut stator for a positive displacement motor |
| 12/21/2011 | CN202081820U 一种用于组合式潜孔锤反循环工法的配气防回转装置 An anti-rotation device combined with air DTH Reverse Circulation Method for |