| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 09/11/2013 | CN203188933U Spiral centralizer for pumping well rod column |
| 09/11/2013 | CN203188932U Spiral rigid idler wheel resin centering device for sleeve |
| 09/11/2013 | CN203188931U Spiral rigid resin centralizer device |
| 09/11/2013 | CN203188930U Novel sucker rod stabilizer |
| 09/11/2013 | CN203188929U Hexagonal outer circle drill stem device quick to connect and for coal mine tunnel drilling |
| 09/11/2013 | CN203188928U Gas drainage drill stem friction welded joint |
| 09/11/2013 | CN203188927U Underground circuit repeated release butt joint device |
| 09/11/2013 | CN203188926U Pneumatic tyre union sealed type telescopic stand pipe assembly |
| 09/11/2013 | CN203188925U External thickening coupling-free casing |
| 09/11/2013 | CN203188924U Three-edge hexagonal drill stem device quick to connect and used for coal mine tunnel drilling |
| 09/11/2013 | CN203188923U Manual-operated portable drill rod in water conservancy irrigation area |
| 09/11/2013 | CN203188922U Hermetic seal buckle profile |
| 09/11/2013 | CN203188921U Air-tight seal buckling mold |
| 09/11/2013 | CN103299022A Centraliser |
| 09/11/2013 | CN103299021A Flex joint for downhole drilling applications |
| 09/11/2013 | CN103291275A Unlocking method and unlocking control system of rotary-drill and drill lock rod of rotary-drill |
| 09/11/2013 | CN103291228A Oil casing special threads and machining method thereof |
| 09/11/2013 | CN103291227A High-temperature-resistant and antioxidative heat-insulating petroleum pipe |
| 09/11/2013 | CN103291226A Multi-trunking petroleum pipe structure |
| 09/11/2013 | CN103291224A Drill bit structure with connecting sleeve pipe |
| 09/11/2013 | CN103290324A Fine-grain ferrite + pearlite type N80-1 non-quenched and tempered seamless oil bushing, and production method thereof |
| 09/11/2013 | CN102534372B Preparation method of P110-grade expansion tube for exploiting petroleum and gas |
| 09/11/2013 | CN102345449B Fixing test pup joint for flow test of generator |
| 09/11/2013 | CN101631929B A connector |
| 09/10/2013 | US8528659 Pneumatic power tool with exhaust silencer |
| 09/10/2013 | US8528647 Riser pipe with rigid auxiliary lines assembled by pins |
| 09/10/2013 | CA2729427C Rotating control head radial seal protection and leak detection systems |
| 09/06/2013 | WO2013130269A1 Rotating and translating shunt tube assembly |
| 09/06/2013 | WO2013130092A1 Perforating apparatus and method having internal load path |
| 09/06/2013 | WO2013126956A1 Screw element for a screw conveyor |
| 09/06/2013 | WO2012112983A3 Apparatus and methods for well completion design to avoid erosion and high friction loss for power cable deployed electric submersible pump systems |
| 09/05/2013 | US20130228382 Inner gauge ring drill bit |
| 09/04/2013 | EP2633150A1 Remotely operated underwater redirection plenum chamber for spill response |
| 09/04/2013 | CN203175509U Automatic selective-assembly injecting tubular column for air and steam injection |
| 09/04/2013 | CN203175508U Fire flooding influenced well concentric type exhausting, thin oil mixing and oil extracting production tubular column |
| 09/04/2013 | CN203175505U Directional hydraulic ejector and tubular column thereof |
| 09/04/2013 | CN203175497U Oil well eccentric-wear-prevention centralizer pumping-assistance device |
| 09/04/2013 | CN203175430U Double-channel fluid passing device used for exploitation and filling integration well |
| 09/04/2013 | CN203175429U Sucker rod |
| 09/04/2013 | CN203175428U Long-wing self-locking type ground remote control tapered stabilizer |
| 09/04/2013 | CN203175427U Construction pipe anti-stuck device |
| 09/04/2013 | CN203175426U Oil sucking rod provided with detachable centralizer |
| 09/04/2013 | CN203175425U Sand layer geology directional drilling penetration centering guide |
| 09/04/2013 | CN203175424U Polished rod centralizer in peculiar shape |
| 09/04/2013 | CN203175423U Anti-abrasion tool for bidirectional bearing drill rig |
| 09/04/2013 | CN203175422U Quick airtight casing thread connector |
| 09/04/2013 | CN203175421U Casing pipe provided with thread connecting structure |
| 09/04/2013 | CN203175420U Oil tube variable buckle assisting people to rapidly take and place elastic rubber core |
| 09/04/2013 | CN203175419U Large-arc inner hole transition drill stem connector |
| 09/04/2013 | CN203175418U Small frictional force type drilling rod |
| 09/04/2013 | CN203175417U Welding drill collar |
| 09/04/2013 | CN203175416U Improved tubing head for low-pressure acidity gas well repair |
| 09/04/2013 | CN203175415U Improved drilling machine for trenchless construction |
| 09/04/2013 | CN203175414U Large-aperture lift sub drill stem |
| 09/04/2013 | CN203175413U Five-inch internal-external upset drill pipe |
| 09/04/2013 | CN203175412U Non-standard integrated drill stem |
| 09/04/2013 | CN203175411U External upset welding-line-less drill rod |
| 09/04/2013 | CN203175410U Reinforced type drilling rod |
| 09/04/2013 | CN203175394U Engineering drilling machine capable of carrying out ultra-flow state concrete pressing-and-filling pile construction on hard rock stratum |
| 09/04/2013 | CN203174589U Deep layer cement mixing pile machine drill bit blade device |
| 09/04/2013 | CN103282708A Threaded connection for drilling and working hydrocarbon wells |
| 09/04/2013 | CN103282599A Low equivalent circulation density setting tool |
| 09/04/2013 | CN103282598A Device for handling hoses of a working well for a drilling rig |
| 09/04/2013 | CN103282597A Secondary flow path module, gravel packing system including the same, and method of assembly thereof |
| 09/04/2013 | CN103282596A Bottom preventer for use in a drilling system |
| 09/04/2013 | CN103282595A Lateral junction assembly |
| 09/04/2013 | CN103277055A Tubing centralizer |
| 09/04/2013 | CN103277054A Sucker rod |
| 09/04/2013 | CN103277053A Drill stem with floral tube |
| 09/04/2013 | CN103276297A Self-connecting type and high-strength seamless steel tube for rope coring drill rod, as well as manufacturing method thereof |
| 09/04/2013 | CN102535445B Molding device and molding method for long spiral extruding rock-entering cast-in-place pile |
| 09/04/2013 | CN102505923B Shock absorber of drill string |
| 09/04/2013 | CN102022086B Manufacturing method of economical seamless oil well pipe for expansion pipe |
| 09/04/2013 | CN101864904B Operation device for stripping sucker rod at pressure |
| 09/04/2013 | CN101353950B On-site connection joint for downhole tool and downhole tool |
| 09/03/2013 | CA2697305C Field joint for a downhole tool |
| 08/29/2013 | WO2013126555A1 Cementing whipstock apparatus and methods |
| 08/29/2013 | WO2013126070A1 Protection of casing lowside while milling casing exit |
| 08/29/2013 | WO2013124387A1 Connector assembly |
| 08/29/2013 | WO2013124386A1 Connector assembly |
| 08/29/2013 | WO2013070266A3 Composite cable systems for use in an in situ oil production process |
| 08/29/2013 | WO2012175658A3 Tubular device with radiofrequency communication for well head |
| 08/29/2013 | US20130220705 Assembled drilling tool |
| 08/29/2013 | US20130220701 Torque Control Device For A Downhole Drilling Assembly |
| 08/29/2013 | US20130220636 Drill string components resistant to jamming |
| 08/28/2013 | CN203161173U Well opening pressure-measuring pressure gauge connector |
| 08/28/2013 | CN203161115U Automatic centralizer for hair braid of oil pumping unit |
| 08/28/2013 | CN203161114U Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing |
| 08/28/2013 | CN203161113U Sucker rod eccentric wear preventing device |
| 08/28/2013 | CN203161112U Anti-eccentric-wear device of oil well of oil field |
| 08/28/2013 | CN203161111U Hole protection sleeve expansion adjuster for drilling on waterways |
| 08/28/2013 | CN203161110U Oil pipe connector used for bailing well |
| 08/28/2013 | CN203161109U Floating coupling special for horizontal wells |
| 08/28/2013 | CN203161108U Ground auger |
| 08/28/2013 | CN203161107U Anti-tripping device structure of oil sucker rod |
| 08/28/2013 | CN203161106U Hollow rod connecting device |
| 08/28/2013 | CN203161105U Novel directional joint of radial horizontal well |
| 08/28/2013 | CN203161104U Straightening abrasion-proof hollow sucker rod |
| 08/28/2013 | CN203161103U Prestressed vacuum heat-insulating sleeve |
| 08/28/2013 | CN203161102U Corrosion-resistant and huge-load sucker rod |