| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 07/31/2013 | CN203097706U Top-drive opposite-opening type lifting ring adapter |
| 07/31/2013 | CN203097705U Double-drive bidirectional heavy-pipe deep-stirring underground diaphragm wall machine |
| 07/31/2013 | CN203086950U High-power four-stroke hole digger |
| 07/31/2013 | CN103225479A 液压式工程钻机 Hydraulic Drilling Rig |
| 07/31/2013 | CN103225478A Hydraulic type driving system for engineering driller |
| 07/31/2013 | CN102506100B Hydraulic brake device |
| 07/31/2013 | CN102155157B Spiral drilling machine for forming concrete piles of different depths and shapes |
| 07/24/2013 | CN203081885U Torque maximizing device of full-sleeve full-slewing drilling machine |
| 07/24/2013 | CN203081283U Adjustable rotary table seat |
| 07/24/2013 | CN203081282U Water well drilling rig |
| 07/24/2013 | CN203081281U Hydraulic pipeline structure of full-sleeve full-slewing drilling machine |
| 07/24/2013 | CN103216192A Screw drilling robot with underground detection function |
| 07/24/2013 | CN103215955A Airborne hydraulic spiral pile driver |
| 07/17/2013 | CN203069171U Rotation angle measurement device and engineering?machinery |
| 07/17/2013 | CN203067756U Circulating cooling system of power head reduction box and rotary drilling rig |
| 07/17/2013 | CN203067754U Lubricating device of power head reducer and rotary drilling rig |
| 07/17/2013 | CN203067753U Engineering machinery and speed reducer |
| 07/17/2013 | CN203067658U Counterweight device of rotary drilling rig |
| 07/17/2013 | CN203066955U Rotary drilling rig overturning-prevention control system and rotary drilling rig |
| 07/17/2013 | CN203066913U Hole drilling construction equipment of reverse circulation drill |
| 07/17/2013 | CN203066881U Opening-type drilling tool and rotary drilling rig |
| 07/17/2013 | CN203066876U Sliding frame and power device and rotary drilling rig |
| 07/17/2013 | CN203066862U Rotary drilling rig provided with oil-electric dual system and drilling rod for transport |
| 07/17/2013 | CN203066855U Sliding frame and power device and rotary drilling rig |
| 07/17/2013 | CN203066854U Power head buffering device and rotary drilling rig |
| 07/17/2013 | CN203066853U Full hydraulic top drive drilling machine feed hydraulic system |
| 07/17/2013 | CN203066852U Pore-forming device in soil nailing construction |
| 07/17/2013 | CN203066069U Pipe winding device hydraulic system and piling machinery |
| 07/17/2013 | CN101725589B Hydraulic system and rotary drilling rig comprising same |
| 07/16/2013 | US8484827 Method of assembling a drilling and/or hammering tool |
| 07/10/2013 | CN203050531U Long spiral drilling machine |
| 07/10/2013 | CN203050503U Super-deep-hole double-tube directional drilling machine |
| 07/10/2013 | CN203050496U Dual hydraulic motor drive type gyrator |
| 07/10/2013 | CN203050495U Water faucet |
| 07/10/2013 | CN203050494U Power head of long spiral drilling machine |
| 07/10/2013 | CN203050493U Power box for machine-mounted exploring drilling machine |
| 07/10/2013 | CN203050492U Long spiral drilling machine lifting device and long spiral drilling machine |
| 07/10/2013 | CN203050491U Frame lifting device of long spiral drilling machine and long spiral drilling machine |
| 07/10/2013 | CN203050490U Long spiral drilling machine and frame lifting device thereof |
| 07/10/2013 | CN203050489U Wedge-shaped key bar for power head |
| 07/10/2013 | CN203050488U Combined lifting ring |
| 07/10/2013 | CN203050487U Tubular drill and pile cutting drilling machine using same |
| 07/10/2013 | CN103195359A Hydraulic power head engineering driller |
| 07/10/2013 | CN103195358A Pneumatic frame column type drilling machine for mines and working method and application thereof |
| 07/10/2013 | CN103195357A Full-casing type special drilling machine |
| 07/10/2013 | CN102359346B Lunar soil deep drilling sample recycling mechanism |
| 07/03/2013 | CN203035955U Grouting sealing structure of long spiral drilling machine power head |
| 07/03/2013 | CN203035085U Punching and rod inserting machine |
| 07/03/2013 | CN203035075U Sealing structure of oil rotary table body |
| 07/03/2013 | CN203035074U Universal rotary drilling machine |
| 07/03/2013 | CN203035073U Long spiral drilling machine |
| 07/03/2013 | CN203035072U Power system of drilling machine |
| 06/27/2013 | DE102011056808A1 Futterrohr und adapter zum herstellen einer mechanischen verbindung zwischen einem topdrive und einem futterrohr Feed tube and adapter for the manufacture of a mechanical link between a top drive and a feed pipe |
| 06/26/2013 | CN203023451U Anti-silt device of power head box body of rotary drilling rig |
| 06/26/2013 | CN203022621U Novel dual planetary reduction box power head |
| 06/26/2013 | CN203022620U Drilling equipment used in petroleum exploitation process |
| 06/26/2013 | CN203022619U Locking device for telescopic drill rod of drilling machine |
| 06/26/2013 | CN103174387A Construction method of soil squeezing and dumping drill rod, twist drill, pile machine, and soil squeezing and dumping pile |
| 06/26/2013 | CN103174377A Turntable with shackling function |
| 06/25/2013 | CA2678832C Improvements in or relating to top drives |
| 06/19/2013 | CN203008776U Hydraulic drive turntable |
| 06/19/2013 | CN203008775U Power head of rotary drilling rig |
| 06/19/2013 | CN203008774U High-speed punching device |
| 06/19/2013 | CN203008773U Load protection device for all-casing full-circle slewing drilling machine |
| 06/19/2013 | CN203007950U Pile core soil draw-out device |
| 06/19/2013 | CN203007934U Construction device capable of drilling to the bottom of stratum with hard lower portion and unconsolidated upper portion |
| 06/19/2013 | CN103161401A Ship for offshore operation |
| 06/19/2013 | CN102383723B Seabed type conical investigating and drilling integrated machine |
| 06/19/2013 | CN102052363B Controllable low-velocity and large-toque power head motor |
| 06/19/2013 | CN101798904B Device for supplying concrete and gas into drill ribbon of drilling device when forming concrete borehole |
| 06/12/2013 | CN202990847U Two-dimensional plane drill carriage |
| 06/12/2013 | CN202990846U Spiral hole forming machine of cast-in-place pile |
| 06/12/2013 | CN202990845U Drilling drive system |
| 06/12/2013 | CN202990844U Annular drilling and blasting rack used for tunnel blasting construction |
| 06/12/2013 | CN202990843U Independence movable type drilling machine used for tunnel blasting construction |
| 06/12/2013 | CN202990842U Annular drilling and blasting device used for tunnel blasting construction |
| 06/12/2013 | CN103147685A Multifunctional vertical shaft core drilling rig |
| 06/12/2013 | CN101705785B Mining linkage all-hydraulic drilling machine |
| 06/06/2013 | WO2013078810A1 Hydraulic motor system for unit head of self-cooling rotary drilling rig and rotary drilling rig |
| 06/05/2013 | CN202971734U Rotary drilling rig and automatic counterweight regulating system thereof |
| 06/05/2013 | CN202970677U Long spiral drilling machine |
| 06/05/2013 | CN202970568U Drilling bucket and rotary drilling rig adopting same |
| 06/05/2013 | CN202970516U Rotary drilling rig drill stem and rotary drilling rig |
| 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 | CN202970452U Rotary drilling rig and turnplate seat thereof |
| 06/05/2013 | CN202970451U Detachable top drive tackle device |
| 06/05/2013 | CN202970450U Guide rail special for oil drilling machine folding automatic buckling installation pin-free torque bearing type top drive |
| 06/05/2013 | CN202970449U Rotary drilling rig power head |
| 06/05/2013 | CN202970448U Power head and rotary drilling machine comprising the same |
| 06/05/2013 | CN202970447U Long spiral drilling machine and power head thereof |
| 06/05/2013 | CN202970446U Trestle-type column hydraulic rotary drilling machine with gyrator guide mechanism |
| 06/05/2013 | CN202970445U Fixing device of pressurizing oil cylinder and rotary drilling rig using same |
| 06/05/2013 | CN202970444U Long spiral drilling machine and drilling hydraulic system thereof |
| 06/05/2013 | CN202970443U Soil receiving and dumping device for rotary drilling rig |
| 06/05/2013 | CN202970442U Fuel and electricity hybrid long spiral drilling machine |
| 06/05/2013 | CN202970441U Hybrid electric hydraulic system for rotary drilling rig |
| 06/05/2013 | CN202970440U Connecting device of pressurized oil cylinder and rotary drilling rig applying connecting device |