| Patents for E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619) |
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| 06/26/2013 | CN102022079B Outburst-prevention drilling machine on mining surface of gassy outburst coal mine and frequency conversion variable liquid-supplying self-walking pump station thereof |
| 06/26/2013 | CN101839112B Adjusting device of frame pillar drilling machine |
| 06/19/2013 | CN203009506U Long-distance hydraulic installation connecting mechanism |
| 06/19/2013 | CN203008779U Moving type roof expansion bolt punching device |
| 06/19/2013 | CN203008777U Ground source heat pump deep hole drill |
| 06/19/2013 | CN103162071A Transverse moving device |
| 06/19/2013 | CN103161403A Excavator with rotary drilling rig |
| 06/19/2013 | CN103161401A Ship for offshore operation |
| 06/19/2013 | CN102305035B Device for adjusting centration of complete vehicle-mounted service machine to wellhead |
| 06/13/2013 | WO2013085774A2 Torque track system and method |
| 06/13/2013 | WO2012130787A3 Derrick apparatus |
| 06/13/2013 | US20130145723 Torque track system and method |
| 06/12/2013 | CN202990886U Ceiling perforating device |
| 06/12/2013 | CN202990885U Novel blowout preventer guide rail |
| 06/12/2013 | CN202990884U Novel piling machine working device |
| 06/12/2013 | CN202990852U Compact land petroleum drilling machine |
| 06/12/2013 | CN202990850U Column type pneumatic anchor hole drilling machine |
| 06/12/2013 | CN202990849U Plane revolution down-hole drill for drilling cutting holes along side wall of bored pile rock shaft |
| 06/12/2013 | CN202990847U Two-dimensional plane drill carriage |
| 06/12/2013 | CN202990843U Independence movable type drilling machine used for tunnel blasting construction |
| 06/12/2013 | CN202989909U Piling machine landing leg capable of displaying bearing pressure |
| 06/12/2013 | CN103147695A Angle adjusting mechanism of horizontal directional drilling machine |
| 06/12/2013 | CN103147690A Multifunctional drill carriage |
| 06/12/2013 | CN103147689A Multifunctional rotary drilling rig |
| 06/12/2013 | CN102003143B Multidirectional hydraulic rock drilling machine with integrated drives |
| 06/06/2013 | WO2013082172A1 Tubular stand building and racking system |
| 06/06/2013 | CA2855887A1 Tubular stand building and racking system |
| 06/05/2013 | EP2599710A2 Ventilation apparatus of a drillship |
| 06/05/2013 | EP2599709A2 Polar vessel having a derrick |
| 06/05/2013 | CN202970511U Telescopic rod for workover rig with no anchor ropes |
| 06/05/2013 | CN202970510U Mast support device and rotary drilling rig |
| 06/05/2013 | CN202970509U Novel accurate positioning control system for rotary rig substructure |
| 06/05/2013 | CN202970508U Control system for coordinating lifting of foldable drill machine base |
| 06/05/2013 | CN202970507U Long spiral drilling machine and connecting structure of hydraulic support legs of long spiral drilling machine |
| 06/05/2013 | CN202970506U Single-supporting-column pneumatic drilling machine |
| 06/05/2013 | CN202970505U Limiting device for pneumatic drill sliding table |
| 06/05/2013 | CN202970504U Single-strut air-operated drill with auxiliary stand column |
| 06/05/2013 | CN202970503U Sliding table locating structure for drilling rig |
| 06/05/2013 | CN202970502U Oscillation angle locating mechanism for sliding table of drilling rig |
| 06/05/2013 | CN202970501U Long spiral drilling rig and landing leg connecting structure thereof |
| 06/05/2013 | CN202970500U Mast support base and rotary drilling rig using mast support base |
| 06/05/2013 | CN202970499U Mast support and buffer device and rotary drilling rig using mast support and buffer device |
| 06/05/2013 | CN202970498U Long spiral drilling machine and mast thereof |
| 06/05/2013 | CN202970497U Long spiral drilling rig and mast thereof |
| 06/05/2013 | CN202970496U Mast of long spiral drilling rig and mast segment of mast |
| 06/05/2013 | CN202970495U Long spiral drilling rig and folding mast thereof |
| 06/05/2013 | CN202970494U Long spiral drilling rig |
| 06/05/2013 | CN202970493U Simple drilling bracket of ceiling |
| 06/05/2013 | CN202970470U Positioning and balancing device for gadder in drilling |
| 06/05/2013 | CN202970468U Hydraulic pressure walking type chassis |
| 06/05/2013 | CN202970467U Long spiral drilling machine |
| 06/05/2013 | CN202970463U Tandem-type walking mechanism |
| 06/05/2013 | CN202970460U Wheeled drilling machine |
| 06/05/2013 | CN202970437U Long spiral drilling machine |
| 06/05/2013 | CN202970436U Long spiral drilling rig |
| 06/05/2013 | CN103140644A Unconditionally stable floating offshore platforms |
| 06/05/2013 | CN103132923A Integrated high-wind-pressure down-the-hole drill |
| 06/05/2013 | CN103132922A Leveling system |
| 06/05/2013 | CN103132921A Design method of hydraulic system of drilling machine |
| 06/05/2013 | CN103132920A Oil field derrick hoisting and landing control system |
| 06/05/2013 | CN103132919A Oil field derrick hoisting and landing control method |
| 06/05/2013 | CN102182401B Folding type fully hydraulic crawler pile driver |
| 06/04/2013 | US8453758 Dual density mud return system |
| 06/01/2013 | CA2797322A1 Leveling system |
| 05/30/2013 | WO2013077595A1 Seabed drilling and vertical shaft construction method |
| 05/29/2013 | CN202954805U Mast control device of small-sized rotary drilling rig |
| 05/29/2013 | CN202954746U Device for conveniently drilling high part of building |
| 05/29/2013 | CN202954745U Integrated connection device of transportation well frame and herringbone frame |
| 05/29/2013 | CN202954744U Train type translation leveling device |
| 05/28/2013 | US8451136 Sonde attachment means |
| 05/24/2013 | CA2793583A1 Drilling apparatus and method for producing a vertical bore |
| 05/22/2013 | CN202946845U Headframe foot locating device for standing large-scale headframe |
| 05/22/2013 | CN202946178U Entire roadway anchor protection all-in-one machine |
| 05/22/2013 | CN202946061U Zero-torque drilling machine |
| 05/22/2013 | CN202946030U Folding tower of movable drilling machine |
| 05/22/2013 | CN202946029U Derrick boom mounting instrument |
| 05/22/2013 | CN202946028U Safety device of pusher leg rock drill |
| 05/22/2013 | CN202946027U Novel connection mechanism used for engineering driller |
| 05/22/2013 | CN202946026U Linkage structure of boring machine power head and guide rails |
| 05/22/2013 | CN202946011U Track walking deck rotation full hydraulic underground drilling rig |
| 05/22/2013 | CN202946010U Dual-purpose type impacting and rotating anchor rod drilling machine |
| 05/22/2013 | CN103119239A Multi-operational multi-drilling system |
| 05/22/2013 | CN103114814A Drilling machine and rotation device thereof |
| 05/22/2013 | CN103114808A Arch centering pipe shed drilling machine |
| 05/22/2013 | CN103114806A 旋挖钻机 Rotary Drilling Rig |
| 05/22/2013 | CN101975077B High-outburst coal mine coal roadway drilling-loading-bolting integrated machine |
| 05/15/2013 | CN202937193U Guiding piece for drilling tool and drilling unit |
| 05/15/2013 | CN202937177U Drilling machine capable of automatically regulating working face to keep horizontal or certain angle |
| 05/15/2013 | CN202937176U Hole leading drilling machine capable of freely adjusting inclined angle |
| 05/15/2013 | CN103104191A Super-large-aperture pile foundation hole drilling machine |
| 05/15/2013 | CN103104190A Super-large-aperture pile foundation hole drilling machine |
| 05/15/2013 | CN101652531B Noise-dampening shield structure for rock drilling apparatus |
| 05/15/2013 | CA2758440A1 Top plate alignment template device |
| 05/10/2013 | WO2013028558A3 All electric powered mobile jumbo drill machine |
| 05/08/2013 | EP2588703A1 Remotely operable underwater drilling system and drilling method |
| 05/08/2013 | CN202926225U Oil drilling and repairing machine capable of pulling double joints or three joints |
| 05/08/2013 | CN202926224U Drilling platform guardrail |
| 05/08/2013 | CN202926223U Telescopic high altitude control rack |
| 05/08/2013 | CN202926222U Mast support on rotary drilling rig capable of preventing rope from being abraded and pressed |
| 05/08/2013 | CN202926221U Module-type drilling machine rack |