| Patents for E21B 3 - Rotary drilling (4,061) |
|---|
| 06/05/2013 | CN202970439U Leakage-free rapid braking mining pneumatic drilling machine |
| 06/05/2013 | CN202970438U Low-noise mineral pneumatic drill |
| 06/05/2013 | CN202970437U Long spiral drilling machine |
| 06/05/2013 | CN202970436U Long spiral drilling rig |
| 06/05/2013 | CN202969389U Spiral shovel for clearing soil of pile core |
| 06/05/2013 | CN103132905A Hydraulic power head of engineering driller |
| 06/05/2013 | CN103132904A Anchor rod assisting drilling machine |
| 06/05/2013 | CN102182401B Folding type fully hydraulic crawler pile driver |
| 05/30/2013 | WO2013075447A1 Rotary drilling rig and device controlling main hoist lowering speed therefor |
| 05/29/2013 | CN202954740U Drill bit of rotary excavator |
| 05/29/2013 | CN103123003A 旋转轴过渡装置 Transition means the axis of rotation |
| 05/24/2013 | CA2793583A1 Drilling apparatus and method for producing a vertical bore |
| 05/23/2013 | WO2013073879A1 Reverse circulation excavating apparatus |
| 05/22/2013 | CN202946012U Sleeving spiral drilling machine for pile head processing |
| 05/22/2013 | CN202946008U Cluster well batch well drilling device |
| 05/22/2013 | CN103114814A Drilling machine and rotation device thereof |
| 05/22/2013 | CN103114808A Arch centering pipe shed drilling machine |
| 05/16/2013 | WO2013070479A1 Drilling apparatus including milling devices configured to rotate at different speeds |
| 05/15/2013 | CN202937180U External winch pressure device |
| 05/15/2013 | CN202937179U Pile hole circular cutting system |
| 05/15/2013 | CN202937178U Power head buffering structure of rotary drilling rig |
| 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 | CN202937175U Rotary drilling machine edge cutting device for processing underground continuous grooves |
| 05/15/2013 | CN103104191A Super-large-aperture pile foundation hole drilling machine |
| 05/15/2013 | CN103104190A Super-large-aperture pile foundation hole drilling machine |
| 05/08/2013 | DE102011117866A1 Earth drilling apparatus has motor-gear unit, operating and holding unit, which is connected to motor-gear unit and auger, where motor-gear unit and auger are connected by torque-load limiting device |
| 05/08/2013 | CN202926203U Power head device of hydraulic swing sprayer |
| 05/08/2013 | CN202926202U Gyrator power head with buffering device |
| 05/08/2013 | CN202926201U Locking device for openable box-type power head |
| 05/08/2013 | CN103089284A Pneumatic jumbolter |
| 05/08/2013 | CN103089144A Buffer power head for horizontal directional drilling machine |
| 05/08/2013 | CN103089143A Pure electric hydraulic rotary drilling rig |
| 05/02/2013 | WO2013013993A3 Device for producing a bore in the ground, rotary drive device and rotary seal arrangement |
| 05/01/2013 | CN202913951U Power head and rotary drilling rig with adjustable pulley yoke center distance |
| 05/01/2013 | CN202913945U Drilling machine with motor as main motive power |
| 05/01/2013 | CN202913944U Rotary drilling rig rock-entering soft system |
| 05/01/2013 | CN202913943U Anti-skid triangle device |
| 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 | CN103075104A Rotary drilling rig and working device thereof |
| 05/01/2013 | CN103075103A Self-walking shale gas drilling machine |
| 05/01/2013 | CN103075096A Dual-hydraulic motor drive type gyrator |
| 05/01/2013 | CN103074888A Two-wheel-driven bidirectional heavy-pipe deep stirring ground wall connecting machine |
| 05/01/2013 | CN102226374B Rotary power head of coaxial transmission drilling machine |
| 05/01/2013 | CN102226342B Multi-functional piling machine for jet grouting pile-sinking |
| 05/01/2013 | CN101824960B Full-hydraulic screw drilling machine |
| 05/01/2013 | CN101796258B Spring preloaded bearing assembly and well drilling equipment comprising same |
| 04/24/2013 | EP2584138A2 Apparatus and methods for wedge lock prevention |
| 04/24/2013 | CN202900053U Portable multi-functional drilling machine |
| 04/24/2013 | CN202900037U Drilling machine power head |
| 04/24/2013 | CN202900036U Deep hole geological prospecting drilling machine |
| 04/24/2013 | CN202897869U Multifunctional telescopic crane |
| 04/24/2013 | CN103061681A Drill rod for rotary drilling rig and rotary drilling rig |
| 04/24/2013 | CN103061680A Sliding frame, power device and rotary drilling rig |
| 04/24/2013 | CN103061675A Super-deep hole double-tube drilling directional drilling rig |
| 04/24/2013 | CN103061674A Underwell oil layer driller |
| 04/24/2013 | CN103061673A Multifunctional micropile drilling machine |
| 04/24/2013 | CN103061669A Large-through-hole power head with brake function of coal mine directional drilling machine |
| 04/24/2013 | CN103061668A Sliding frame, power device and rotary drilling rig |
| 04/24/2013 | CN102251522B Filling pile coring method and combined concrete coring device |
| 04/24/2013 | CN102220864B Hydraulic control system for rotation system of horizontal directional drilling machine |
| 04/24/2013 | CN102182396B Core drilling machine power head capable of keeping off opening orifice |
| 04/24/2013 | CN101974905B Pile-embedding method for hollow pile and auger drill for implementing same |
| 04/24/2013 | CN101737002B Self-adapting locking feeding mechanism of rotary drilling rig |
| 04/23/2013 | CA2738008C Modular rotary drill head |
| 04/17/2013 | CN202882753U Power head connecting device of providing two-way large torque |
| 04/17/2013 | CN202882752U Back pressure protector of full-sleeve full-slewing drilling machine |
| 04/17/2013 | CN202881937U Mixing pile machine transmission device |
| 04/17/2013 | CN103047367A Counter weight device and engineering machinery |
| 04/17/2013 | CN103046866A Universal rotating drilling machine |
| 04/17/2013 | CN103046865A Power source conveying device of hydraulic drill |
| 04/17/2013 | CN103046864A Pile type integral soil taking device of base pillar |
| 04/17/2013 | CN102364028B Multifunctional full-hydraulic drilling machine |
| 04/17/2013 | CN102251760B Loose bed and bedrock layer mixed water-intaking and well-forming process for geothermal well |
| 04/11/2013 | CA2792107A1 Top drive |
| 04/10/2013 | CN202867695U Damping transmission cover of rotary drilling rig |
| 04/10/2013 | CN202866642U Lower driving diving pump type reverse circulation well drill |
| 04/10/2013 | CN202866641U Long spiral drilling machine and power head thereof |
| 04/10/2013 | CN202866640U Rotating assembly driver for gas drilling by using top drive |
| 04/10/2013 | CN202866639U Device for improving rotary drilling rig hole-forming efficiency |
| 04/10/2013 | CN202866638U Double-power rotary-drilling-rig hydraulic system |
| 04/10/2013 | CN202866637U Rotary locking device for rotating drilling rig |
| 04/10/2013 | CN202866636U Long spiral drilling machine with self center of gravity controllable |
| 04/10/2013 | CN202864787U Rotary drilling rig and drill lifting mechanism thereof |
| 04/10/2013 | CN103032022A Novel high-efficiency long auger drilling machine |
| 04/10/2013 | CN103032021A Revolving platform and rotary drilling rig |
| 04/10/2013 | CN103032020A Hydraulic feeding system of full-automatic top drive drilling machine |
| 04/10/2013 | CN102305021B Experimental method for simulating dynamic mechanics characteristic of underground drilling rig of air well drilling |
| 04/10/2013 | CN101802342B Stripper rubber with integral retracting retention member connection apparatus |
| 04/10/2013 | CN101748968B Turntable of rotary drilling rig and rotary drilling rig |
| 04/09/2013 | US8413740 Fastener gun washer assembly holding device and method of use |
| 04/04/2013 | US20130081877 Extendable pilot bit for barrel cutter |
| 04/03/2013 | CN202850886U Drive key sleeve for power head |
| 04/03/2013 | CN202850873U Drilling machine |
| 04/03/2013 | CN202850854U Two-stage pressure system for rotary drilling rig |
| 04/03/2013 | CN202850853U Main core tube device and rotary drilling machine comprising the same |
| 04/03/2013 | CN202850852U Rock-core drilling machine |
| 04/03/2013 | CN103016690A Split-type gear box of top drive drilling system |