| Patents for E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619) |
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| 05/08/2013 | CN202926220U Unthreaded rod type feeding rack |
| 05/08/2013 | CN202926219U Height-adjustable stable support cylinder for drilling machine |
| 05/08/2013 | CN202926209U Anchor rod locator |
| 05/08/2013 | CN202926207U Device for increasing and improving pressing force and stability of rotary drilling rig |
| 05/08/2013 | CN202924643U Erecting equipment of large-scale oil derrick |
| 05/08/2013 | CN103089284A Pneumatic jumbolter |
| 05/08/2013 | CN103089178A Torque-free drilling machine |
| 05/08/2013 | CN103089158A Push-pull mechanism of horizontal directional drilling machine |
| 05/08/2013 | CN103089157A Walking-pedrail type movable machine frame |
| 05/08/2013 | CN103089150A Crawler-type full hydraulic directional drilling machine for narrow roadway |
| 05/08/2013 | CN102251747B Arc-shaped drill rack |
| 05/01/2013 | CN202913964U Fast underground supporting and protecting device |
| 05/01/2013 | CN202913963U Scrape and collision prevention device of well drilling derrick two-layer operating floor |
| 05/01/2013 | CN202913962U Landing leg limiting mechanism of tracked hydraulic construction drilling rig |
| 05/01/2013 | CN202913961U Follow-up frame of rotary drilling rig |
| 05/01/2013 | CN202913960U Adjustable additional weight capable of automatically dismantling weight |
| 05/01/2013 | CN202913959U Anti-skidding mast for rotary drilling rig |
| 05/01/2013 | CN202913958U Telescopic mast of drilling machine |
| 05/01/2013 | CN202913951U Power head and rotary drilling rig with adjustable pulley yoke center distance |
| 05/01/2013 | CN202913942U Novel rotary drilling rig |
| 05/01/2013 | CN202913941U Rotary drilling rig with circular tube extensible walking chassis |
| 05/01/2013 | CN103075110A Double rope propelling mechanism |
| 05/01/2013 | CN103075109A Rotary drilling rig and follow-up rack thereof |
| 05/01/2013 | CN103075108A 桅杆及旋挖钻机 Mast and rotary drilling rig |
| 05/01/2013 | CN103075103A Self-walking shale gas drilling machine |
| 04/25/2013 | WO2012033793A8 Two speed direct drive drawworks |
| 04/24/2013 | CN202900055U Supporting leg for all-casing full-circle-swinging drilling machine power station |
| 04/24/2013 | CN202900054U Ceiling drilling equipment |
| 04/24/2013 | CN202900053U Portable multi-functional drilling machine |
| 04/24/2013 | CN202900035U Engineering machine big arm with air storage structure |
| 04/24/2013 | CN202899136U Rail sliding type piling machine |
| 04/24/2013 | CN202899112U 悬臂梁支撑装置 Cantilever support device |
| 04/24/2013 | CN103061680A Sliding frame, power device and rotary drilling rig |
| 04/24/2013 | CN103061679A Piling machine |
| 04/24/2013 | CN103061678A Lifting and well drilling system |
| 04/24/2013 | CN103061673A Multifunctional micropile drilling machine |
| 04/24/2013 | CN102330540B Rotary supporting seat structure |
| 04/24/2013 | CN102140891B Variable-position overhead crane drill tower |
| 04/23/2013 | CA2638009C Upper beam for a telescopic feeder, telescopic feeder and drilling device for rock drilling |
| 04/18/2013 | WO2012138912A4 Offshore top tensioned riser buoyancy can system and methods of field development |
| 04/17/2013 | CN202882779U Upright reinforcing system of full-sleeve full-slewing drilling machine |
| 04/17/2013 | CN202882778U Mounting seat of full-sleeve full-slewing drilling machine |
| 04/17/2013 | CN202882777U Simple back type big triangle drill mast support device of rotary excavating and drilling rig |
| 04/17/2013 | CN202882776U Frame column type drilling machine support for mining |
| 04/17/2013 | CN202882775U Derrick for top drive lifting by using racks |
| 04/17/2013 | CN202882774U Simple work platform for side slop drilling |
| 04/17/2013 | CN202882758U Small agricultural well drilling machine |
| 04/17/2013 | CN202882757U Walking type full slewing drilling machine |
| 04/17/2013 | CN202882756U Hand pressure assisting device used for drilling holing machine |
| 04/17/2013 | CN103047394A Rotary drilling rig and guide pulley yoke device thereof |
| 04/17/2013 | CN103046874A Underground drill rig and supporting device thereof |
| 04/17/2013 | CN103046873A Moving drilling machine well repair platform |
| 04/17/2013 | CN103046866A Universal rotating drilling machine |
| 04/17/2013 | CN103046521A Novel, simple and easy wellhead rack structure and construction method |
| 04/17/2013 | CN102364028B Multifunctional full-hydraulic drilling machine |
| 04/17/2013 | CN102278072B Hydraulic automatic leveling system and leveling method for seabed drilling machine |
| 04/16/2013 | US8418778 Power screwdriver having rotary input control |
| 04/10/2013 | EP2578794A1 Mast for drilling rigs and method of assembling the same |
| 04/10/2013 | DE202013100548U1 Bohrtisch Drilling table |
| 04/10/2013 | CN202867692U Shock-absorbing sliding support device of rotary drilling rig |
| 04/10/2013 | CN202866666U Retractable headframe |
| 04/10/2013 | CN202866665U Drilling machine hydraulic leg grounding plate and long spiral drilling machine utilizing the same |
| 04/10/2013 | CN202866664U L-shaped well mouth support leg for workover rig without anchor rope |
| 04/10/2013 | CN202866663U Inner supporting device for water drilling method manual hole digging pile |
| 04/10/2013 | CN202866662U Outer supporting device for water drilling method manual hole digging pile |
| 04/10/2013 | CN202866654U Train type automatic translating device for drilling machine |
| 04/10/2013 | CN202866646U Drill mast type engineering driller equipped with hydraulic lifting device |
| 04/10/2013 | CN202866645U Coal mine frame column type emulsion drilling machine |
| 04/10/2013 | CN202866636U Long spiral drilling machine with self center of gravity controllable |
| 04/10/2013 | CN202865842U Multifunctional pile establishing machine |
| 04/10/2013 | CN202864770U Combustion arm vertical lifting system |
| 04/10/2013 | CN103032022A Novel high-efficiency long auger drilling machine |
| 04/10/2013 | CN102213076B Vertical shaft type drilling machine with long feeding travel |
| 04/03/2013 | CN202850877U Drill boom with drill bit lifting reset device |
| 04/03/2013 | CN202850876U Drill arm with stroke compensation device and drilling machine |
| 04/03/2013 | CN202850875U Hydraulic single trailer-mounted drill rig derrick |
| 04/03/2013 | CN202850874U Petroleum drilling machine lifting hydraulic cylinder support device |
| 04/03/2013 | CN202850873U Drilling machine |
| 04/03/2013 | CN202850849U Ladder and operating bench dual-folding device for derrick |
| 04/03/2013 | CN103015897A Underwater drilling assembly and method for producing a borehole |
| 04/03/2013 | CN103015893A Non-excavation horizontal directional drilling machine |
| 04/03/2013 | CN103015891A Movable roof expansion bolt punching device |
| 04/03/2013 | CN102168524B Tower-caterpillar integrated core drill machine arranged at the front side of drill tower |
| 04/03/2013 | CN102162337B 滑动式折叠钻塔 Sliding folding rigs |
| 03/27/2013 | CN202832286U Novel dead line stabilizer |
| 03/27/2013 | CN202832241U Rotary drilling rig follow-up bracket device |
| 03/27/2013 | CN202832240U Power head side-moving mechanism of drilling machine |
| 03/27/2013 | CN202832239U Rotary excavating drilling machine movable arm and rotary excavating drilling machine |
| 03/27/2013 | CN202832238U All-dimensional moving base seat for steel pylon composite foundation anchoring drill rig |
| 03/27/2013 | CN202832237U Novel tower for hole drilling of slewing drilling machine |
| 03/27/2013 | CN202832236U Hydraulic lifting n-shaped stand column rig |
| 03/27/2013 | CN202832235U Rope-protection and portable regulating device for derrick guy rope |
| 03/27/2013 | CN202832234U Big bottom crotch structure of vehicle-mounted drill derrick |
| 03/27/2013 | CN202832233U Rotary drilling rig noctilucent pulley yoke side plate and pulley |
| 03/27/2013 | CN202832232U Amplitude variable oil cylinder device for rotary excavating and drilling rig |
| 03/27/2013 | CN202832231U Self-lubrication guide rail slide plate |
| 03/27/2013 | CN202832230U Locking device of upper mast and lower mast of rotary drilling rig |
| 03/27/2013 | CN202832229U Rotary drilling rig night self-luminous pulley |
| 03/27/2013 | CN202832228U Dustproof electric drill ladder assembly |
| 03/27/2013 | CN202832227U Hydraulic spiral lifting ship-shaped base seats |