| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 08/28/2013 | CN203161101U Drill stem used on roof bolter |
| 08/28/2013 | CN203161100U Downhole motor capable of improving extending capacity of drill column |
| 08/28/2013 | CN203161099U Equilateral fillet triangular drill rod |
| 08/28/2013 | CN203161098U Pawl type extraction drill rod |
| 08/28/2013 | CN203160286U Horizontal soil drawing-out device for building correction |
| 08/28/2013 | CN103270146A Joints having improved sealability, lubrication and corrosion resistance |
| 08/28/2013 | CN103266876A Fracturing working method of multilevel hydraulic spraying segmentation fracturing tubular column |
| 08/28/2013 | CN103266875A Fracturing operation method of multistage hydraulic jet staged fracturing tubular column |
| 08/28/2013 | CN103266873A Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| 08/28/2013 | CN103266859A Anti-bending dual-sealing visual repairable tool joint |
| 08/28/2013 | CN103266858A Anti-corrosion anti-wear sucker rod |
| 08/28/2013 | CN102226380B Method for inhibiting vortex-induced vibration of marine riser |
| 08/28/2013 | CN101906941B Integral joint tubing by upset forging processing |
| 08/28/2013 | CN101476446B Drilling rod assembly |
| 08/27/2013 | US8517114 Mechanical lock with pressure balanced floating piston |
| 08/22/2013 | WO2013122787A1 Apparatus and method for positioning and orienting a borehole tool |
| 08/22/2013 | WO2013122589A1 Swelling debris barrier and methods |
| 08/22/2013 | WO2013122573A1 Aligned angled well tool weld joint |
| 08/22/2013 | WO2013122567A1 Piston tractor system for use in subterranean wells |
| 08/22/2013 | WO2013120837A1 Method for producing hydrocarbon gas from a wellbore and valve assembly |
| 08/22/2013 | WO2013120192A1 Casing centralizing device |
| 08/22/2013 | WO2013045882A3 Fibre optic cable deployment, particularly for downhole distributed sensing |
| 08/22/2013 | WO2013039579A3 Methods, systems and apparatus for circulating fluid within the annulus of a flexible pipe riser |
| 08/22/2013 | WO2012156004A3 Connection assembly |
| 08/22/2013 | WO2012122337A3 Altra-low friction coatings for drill stem assemblies |
| 08/22/2013 | WO2012116036A3 Coated sleeved oil gas well production devices |
| 08/22/2013 | US20130216317 Riser support |
| 08/22/2013 | US20130213668 Well tool assemblies with quick connectors and shock mitigating capabilities |
| 08/22/2013 | US20130213663 Surface multiple well |
| 08/22/2013 | US20130213661 Wear bushing for locking to a wellhead |
| 08/22/2013 | US20130213128 Multiple distributed force measurements |
| 08/22/2013 | DE102012003757A1 Coupling system for separating and connecting multi-channel pipeline systems in drill rod piping system of hydraulic low hole drilling hammer, has male and female pieces detachably connected with one another by control part-male piece |
| 08/22/2013 | CA2861417A1 Method for producing hydrocarbon gas from a wellbore and valve assembly |
| 08/21/2013 | EP2628891A1 Assembled drilling tool |
| 08/21/2013 | EP2627860A2 Marine subsea free-standing riser systems and methods |
| 08/21/2013 | EP2627859A2 Marine subsea assemblies |
| 08/21/2013 | EP2627854A2 Tubing grab assembly |
| 08/21/2013 | EP2627853A2 Pressure bearing wall and support structure therefor |
| 08/21/2013 | EP2627851A1 Drill assembly |
| 08/21/2013 | EP2627850A2 A down-the-hole hammer |
| 08/21/2013 | CN203145856U Wedge-shaped tooth device for water-proof duct pipe shoe |
| 08/21/2013 | CN203145855U Pipe shoe for offshore drilling riser |
| 08/21/2013 | CN203145854U Mechanical oil pipe strengthening and centring device at well mouth in workover operation |
| 08/21/2013 | CN203145853U Centralizer of antisubmarine drill rig |
| 08/21/2013 | CN203145852U Safety joint for horizontal and directional drilling of coal mine tunnel |
| 08/21/2013 | CN203145851U Wet type electric coal drill stem |
| 08/21/2013 | CN203145850U Relaying heat pipe type sucker rod |
| 08/21/2013 | CN203145849U Oil well structure capable of improving oil temperature at oil well outlet based on heat pipe principle |
| 08/21/2013 | CN203145848U Drill stem capable of preventing slips from being extruded and damaged |
| 08/21/2013 | CN203145847U Reverse circulation drill device additionally provided with main drill rod and check valve device |
| 08/21/2013 | CN203145846U Grouting freezing tube with traction valve control |
| 08/21/2013 | CN203145845U Externally thickened oil well pipe |
| 08/21/2013 | CN203145005U Pile-forming device for steel pipe retaining wall superstrong rock-socketed cast-in-place pile |
| 08/21/2013 | CN103261577A Well completion |
| 08/21/2013 | CN103261567A Crossover joint for connecting eccentric flow paths to concentric flow paths |
| 08/21/2013 | CN103261566A Riser assembly and method |
| 08/21/2013 | CN103261558A Drill assembly |
| 08/21/2013 | CN103256012A Multifunctional centralizing and oil increasing device |
| 08/21/2013 | CN103256011A Non-rotary connector used for connecting downhole electric module |
| 08/21/2013 | CN102305022B Salvage-type casing pipe drilling tool for drilling |
| 08/20/2013 | US8511392 Downhole swivel sub |
| 08/20/2013 | US8511391 Apparatus and method for coupling conduit segments |
| 08/20/2013 | US8511377 Open hole non-rotating sleeve and assembly |
| 08/20/2013 | CA2749316C Adjustable eccentric bushing assembly for a wireline-operated directional core barrel drill |
| 08/20/2013 | CA2639679C Adjustable bent housing with rotational stop |
| 08/20/2013 | CA2545997C Fuel cell apparatus and method for downhole power systems |
| 08/15/2013 | WO2013119472A1 Downhole screen with exterior shunts and manifolded shunt connections at tubular joints |
| 08/15/2013 | WO2013119251A1 Decoupling a remote actuator of a well tool |
| 08/15/2013 | WO2012151060A3 Adjustment and restraint system for a subsea flex joint |
| 08/15/2013 | WO2012135306A3 Coated oil and gas well production devices |
| 08/15/2013 | WO2012112843A3 System and method for tracking pipe activity on a rig |
| 08/15/2013 | WO2012055036A8 Submersible progressive cavity pump driver |
| 08/15/2013 | US20130206422 Gas Handler, Riser Assembly, and Method |
| 08/15/2013 | US20130206395 System, method and apparatus for reducing shock and vibration in down hole tools |
| 08/14/2013 | EP2625369A1 Pipe and pipe assembly provided with layers of electrically conductive material for conveying substances |
| 08/14/2013 | CN203129984U Universal delivering-twisting device for rotary guiding drilling tool |
| 08/14/2013 | CN203129983U Sweeping drill collar |
| 08/14/2013 | CN203129982U Wear-resistant corrosion-resistant sucker rod with clamping sheath |
| 08/14/2013 | CN203129981U Centralizing device of wireless LWD (logging while drilling) inclinometer |
| 08/14/2013 | CN203129980U Roll ball centering device |
| 08/14/2013 | CN203129979U Mechanical hydraulic type shock absorber |
| 08/14/2013 | CN203129978U Anti-dropping device of sucker rod |
| 08/14/2013 | CN203129977U Double-shouldered screw thread tool connector |
| 08/14/2013 | CN203129976U Pumping rod shock absorber |
| 08/14/2013 | CN203129975U Hydraulic torque safety joint |
| 08/14/2013 | CN203129974U Three-section non-magnetic heavy weight drill pipe |
| 08/14/2013 | CN203129973U Small-dimension drill stem |
| 08/14/2013 | CN203129972U Rib drill rod |
| 08/14/2013 | CN203129971U Weighting pipe for sucker rod |
| 08/14/2013 | CN203129970U Locking rupture-proof sucker rod |
| 08/14/2013 | CN203129969U Sucker rod |
| 08/14/2013 | CN203129151U Grouting head capable of drilling and grouting synchronously |
| 08/14/2013 | CN103244066A Negative pressure drilling system preventing over-limit gas |
| 08/14/2013 | CN103244051A Combined down-hole hammer drilling tool and pile forming construction method thereof |
| 08/14/2013 | CN102329553B Eccentric wear resisting powder paint of oil well pipe |
| 08/14/2013 | CN102322224B Mechanical drill rod |
| 08/14/2013 | CN102268961B Screw drill transmission shaft assembly with vibration reduction function |
| 08/14/2013 | CN102022104B Open-hole packer for open-hole horizontal well and preset connector fracturing well completion method |
| 08/14/2013 | CN101787858B Underground drill stem vibration damping and pressurizing device |
| 08/14/2013 | CN101772614B Rotary steerable drilling system |