| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 07/10/2013 | EP2611983A1 Polymer film for the conditioning of oil extraction pipes |
| 07/10/2013 | EP2611982A1 Protector for an oil extraction pipe |
| 07/10/2013 | CN203050559U Coiled tubing assembly |
| 07/10/2013 | CN203050558U Drilling-tool stabilizer with sensing device |
| 07/10/2013 | CN203050557U Sucker rod self-rotation eccentric-wear-resistant oil-production-enhancing device |
| 07/10/2013 | CN203050556U Shock wave reducing device for oil-gas well perforation tubular column |
| 07/10/2013 | CN203050555U Sucker rod anti-corrosion centralizer |
| 07/10/2013 | CN203050554U Centering device |
| 07/10/2013 | CN203050553U Drill rod clamping bi-directional joint |
| 07/10/2013 | CN203050552U Connecting joint for petroleum drilling |
| 07/10/2013 | CN203050551U External upset oil tube restoration structure used for oil and gas well |
| 07/10/2013 | CN203050550U Anti-loosening device of drill column |
| 07/10/2013 | CN203050549U Casing driving device |
| 07/10/2013 | CN203050548U Sealing cardan shaft for well drilling |
| 07/10/2013 | CN203050547U Deep well pumping rod anti-falling device |
| 07/10/2013 | CN203050546U Sectional type deep well sucker rod anti-drop device |
| 07/10/2013 | CN203050545U Anti-torque coiled tubing annular pressure connector |
| 07/10/2013 | CN203050544U Triangular rotor drill pipe |
| 07/10/2013 | CN203050543U Circular arc-shaped convex edge drill rod with center hole capable of allowing gas release pipe to insert |
| 07/10/2013 | CN203050542U Drill rod with low friction |
| 07/10/2013 | CN203050541U Drill rod for well drilling |
| 07/10/2013 | CN203050540U Hollow drill pipe |
| 07/10/2013 | CN203050539U Two-section petroleum drill rod |
| 07/10/2013 | CN203050538U Novel oil tube for oil and gas well |
| 07/10/2013 | CN203050537U Anti-corrosive sucker rod |
| 07/10/2013 | CN203050536U Oil casing pipe for extracting oil |
| 07/10/2013 | CN203050535U Double-pipe hollow sucker rod |
| 07/10/2013 | CN203050506U Tubular column steering device |
| 07/10/2013 | CN203050489U Wedge-shaped key bar for power head |
| 07/10/2013 | CN203049042U Oil extraction equipment corrosion controller of oil well and oil pumping rod adopting same |
| 07/10/2013 | CN103195375A Automatic anti-mixing liquid changing technology and automatic anti-mixing liquid changing device for vertically and statically electroplating petroleum strings |
| 07/10/2013 | CN103195374A Method for designing salt rock stratum irregular-shaped sleeve |
| 07/10/2013 | CN103194693A High-strength and high-toughness oil casing and manufacturing method thereof |
| 07/10/2013 | CN103194680A Seamless steel pipe material for X-grade drill pipe body and preparation method thereof |
| 07/10/2013 | CN102359346B Lunar soil deep drilling sample recycling mechanism |
| 07/10/2013 | CN102257306B Tubular connection with self-locking threading used in the oil industry |
| 07/10/2013 | CN102140893B Magnetorheological intelligent drilling vibration damper |
| 07/10/2013 | CN102071879B Novel prestressed heat-insulation oil pipe |
| 07/10/2013 | CN102061893B Double shoulder tool joint |
| 07/09/2013 | US8479830 Deployment of a wireline tool |
| 07/09/2013 | US8479827 Disconnect devices for downhole strings |
| 07/04/2013 | WO2013102175A1 Construction articles and methods of forming same |
| 07/04/2013 | WO2013101260A1 Drilling fluid diverting sub |
| 07/04/2013 | WO2013098546A1 Flexible pipe body and method |
| 07/04/2013 | WO2013023972A3 Method and bead tube for treating ground bores |
| 07/04/2013 | WO2012076520A3 Riser top connector |
| 07/04/2013 | WO2012034004A3 Rigid hull gas - can buoys with variable buoyancy |
| 07/04/2013 | US20130169385 Contactless data communications coupling |
| 07/04/2013 | US20130168102 Drilling riser adapter with emergency functionality |
| 07/04/2013 | DE102011122610A1 Device for rotating drill pipes for drilling vertical and horizontal holes in ground without platform, has tongs with rotationally movable thin rollers coated internally with elastic material, for rotary movement of drill pipes |
| 07/04/2013 | CA2857272A1 Threaded joint with low tightening torque |
| 07/03/2013 | EP2609279A2 Tubular threaded connection |
| 07/03/2013 | CN203035900U 复合金属杆 Composite metal rod |
| 07/03/2013 | CN203035145U Fishable bottom plug and fishing tool for expansion pipe |
| 07/03/2013 | CN203035126U Welded directional drilling rod with spiral groove |
| 07/03/2013 | CN203035125U Hollow drill rod for oil drilling |
| 07/03/2013 | CN203035124U Spiral drilling rig causing no scraps discharging |
| 07/03/2013 | CN203035123U Efficient spiral electric coal drill pipe |
| 07/03/2013 | CN203035122U Internal connection connecting disc for drill rod guide sleeve |
| 07/03/2013 | CN203035121U Connecting disc for drill rod guide sleeve |
| 07/03/2013 | CN203035120U Protective rod of drill rod |
| 07/03/2013 | CN203035119U 钻具稳定器 Drill stabilizer |
| 07/03/2013 | CN203035118U Bearing wheel centralizer |
| 07/03/2013 | CN203035117U Lower protective cylinder of long spiral drilling machine |
| 07/03/2013 | CN203035116U Oil casing joint |
| 07/03/2013 | CN203035115U Hydraulic safety joint |
| 07/03/2013 | CN203035114U Shaft bottom drilling tool and anti-dropping self-locking structure thereof |
| 07/03/2013 | CN203035113U Drill rod connector |
| 07/03/2013 | CN203035112U Novel structural oil pipeline for oil and gas well |
| 07/03/2013 | CN203035111U Curved surface double-circular-bead drilling tool joint |
| 07/03/2013 | CN203035110U Drill rod connecting piece |
| 07/03/2013 | CN203035109U Drill rod connector |
| 07/03/2013 | CN203035108U Drill rod connecting rod |
| 07/03/2013 | CN203035107U Connecting shaft used for connecting drill pipe |
| 07/03/2013 | CN203035106U Bidirectional protective compound sucker rod coupling |
| 07/03/2013 | CN203035105U Inverse slip casting casing pipe of elevation angle drill hole |
| 07/03/2013 | CN203035104U Oil hollow drill rod |
| 07/03/2013 | CN203035103U Oil drill rod |
| 07/03/2013 | CN203035102U Open hole horizontal well segmentation multi-cluster even acidification tubular column |
| 07/03/2013 | CN203035101U Under-pressure device heating pipe |
| 07/03/2013 | CN203035079U Clay small-duct drilling machine |
| 07/03/2013 | CN203034451U Movable anchor pole drilling machine breast board |
| 07/03/2013 | CN103184852A Downhole cleaning device |
| 07/03/2013 | CN103184842A Hydraulic suspension packer disconnecting tool and disconnecting method |
| 07/03/2013 | CN103184839A Integrated protector for sucker rods |
| 07/03/2013 | CN103184838A Quickly fastened and unfastened oil drill pipe for well repair |
| 07/03/2013 | CN103184837A Well repair oil drill pipe provided with anti-torque shoulders |
| 07/03/2013 | CN103184836A Directly-connected drill rod |
| 07/03/2013 | CN103184388A Integral normalizing process of 95CrMo steel for rock drilling rod |
| 07/03/2013 | CN102305026B Special-shaped drill pipe for geological exploration and processing method thereof |
| 07/03/2013 | CN102199991B Drilling-fixing integrated device and method for yolk coal terrane |
| 07/02/2013 | US8474539 Pull tube sleeve stress joint for floating offshore structure |
| 07/02/2013 | US8474538 Hydraulically actuated safety lock ring |
| 07/02/2013 | CA2713491C Spiral ribbed aluminum drillpipe |
| 06/27/2013 | WO2013096437A1 Offshore well drilling system with nested drilling risers |
| 06/27/2013 | WO2013096128A1 Hybrid tensioning riser string |
| 06/27/2013 | WO2013096100A1 Hydrostatically powered fracturing sliding sleeve |
| 06/27/2013 | WO2013096085A1 Compression coupling for pipes subjected to tension loads and associated methods |
| 06/27/2013 | WO2013095887A2 Wedge ring for attaching centralizers |
| 06/27/2013 | WO2013095843A1 Subterranean tool with multiple release capabilities |