| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/07/2013 | CA2846455A1 Method and system for drilling with reduced surface pressure |
| 03/07/2013 | CA2843604A1 Multi-position mechanical spear for multiple tension cuts with releasable locking feature |
| 03/07/2013 | CA2843259A1 Resettable lock for a subterranean tool |
| 03/07/2013 | CA2788889A1 Multiple control line assembly for downhole equipment |
| 03/06/2013 | EP2564067A1 A continuous rod pump drive system |
| 03/06/2013 | EP2564013A2 Drilling or extraction pipe string |
| 03/06/2013 | CN202770724U Sucker rod coupling and oil tube abrasion tester |
| 03/06/2013 | CN202767961U Separated recovery device capable of adjusting layers arbitrarily |
| 03/06/2013 | CN202767953U Reciprocating motion converter for oil well |
| 03/06/2013 | CN202767908U Thickened oil thermal production well electric heating rod deflected grind-proof device |
| 03/06/2013 | CN202767907U Drill-rod lifter of drill jumbo |
| 03/06/2013 | CN202767906U Water connector |
| 03/06/2013 | CN202767905U Eccentric wear resistant sucker-rod string |
| 03/06/2013 | CN202767904U Four-stage joint of glass fiber reinforced plastic sucker rod |
| 03/06/2013 | CN202767903U Hollow heat carrier sucker rod |
| 03/06/2013 | CN202767902U Water guide device for drilling |
| 03/06/2013 | CN202767901U Fixed tooth type heavy load cardan shaft device for screw drilling tool |
| 03/06/2013 | CN202767900U Composite material coiled tubing for downhole operation |
| 03/06/2013 | CN202767899U Welding seam metal material coiled tubing for downhole operation |
| 03/06/2013 | CN202767872U Hydraulic anchor drill of workover rig |
| 03/06/2013 | CN102953719A Drag type packer-less hydraulic jet pulsating acid fracturing device and method |
| 03/06/2013 | CN102953690A Wired communication screw rod |
| 03/06/2013 | CN102953689A Radioactive source bin and drill collar with same |
| 03/06/2013 | CN102953688A Heat insulation oil tube with vacuum coating |
| 03/06/2013 | CN102191920B Rotary wear-resisting pumping-aid apparatus for pumping rod |
| 03/06/2013 | CN102031934B Drill rod water feeder |
| 03/06/2013 | CN101975050B Construction method of coal bed gas horizontal well and vertical drainage well in multi-objective layer geologic environment |
| 03/06/2013 | CN101655002B Oil layer-section oil casing pipe for exploiting thick oil by method of combustion drive and production method thereof |
| 03/05/2013 | US8387707 Bellows type adjustable casing |
| 03/05/2013 | US8387703 Tube buoyancy can system |
| 02/28/2013 | WO2013028803A2 Downhole tool and method of use |
| 02/28/2013 | WO2013028801A1 Downhole tool and method of use |
| 02/28/2013 | WO2013028800A2 Downhole tool and method of use |
| 02/28/2013 | WO2013028593A2 Riser-mounted guide assembly for umbilical deployment |
| 02/28/2013 | WO2013028517A2 Universal pipe thread protector |
| 02/28/2013 | WO2013028409A2 Riser system |
| 02/28/2013 | WO2013028383A2 Chemical injection system |
| 02/28/2013 | WO2012177680A3 Well-based fluid communication control assembly |
| 02/28/2013 | WO2012138912A3 Offshore top tensioned riser buoyancy can system and methods of field development |
| 02/28/2013 | WO2012118772A3 Metal expandable element back-up ring for high pressure/high temperature packer |
| 02/28/2013 | WO2012118631A3 Electric submersible pump floating ring bearing and method to assemble same |
| 02/28/2013 | WO2012001355A3 Riser wireless communications system |
| 02/28/2013 | US20130048296 Riser-mounted guide assembly for umbilical deployment |
| 02/28/2013 | US20130048287 Hydraulic stabilizer for use with a downhole casing cutter |
| 02/28/2013 | CA2850076A1 Guided maneuvering of a mining vehicle to a target destination |
| 02/28/2013 | CA2846170A1 Universal pipe thread protector |
| 02/28/2013 | CA2842713A1 Downhole tool and method of use |
| 02/28/2013 | CA2842711A1 Downhole tool and method of use |
| 02/28/2013 | CA2842381A1 Downhole tool and method of use |
| 02/27/2013 | CN202755955U Gravel packing string for horizontal wells |
| 02/27/2013 | CN202755916U Mine spiral drill rod |
| 02/27/2013 | CN202755915U Bar material for drilling rod |
| 02/27/2013 | CN202755914U Rod stabilizer for roller drill |
| 02/27/2013 | CN202755913U Oil casing joint |
| 02/27/2013 | CN202755912U Down-the-hole drill bumper |
| 02/27/2013 | CN202755911U Puncture-proof short section |
| 02/27/2013 | CN202755910U Cable drill pipe information transmission connector |
| 02/27/2013 | CN202755909U High-strength flexible oil pumping polished rod |
| 02/27/2013 | CN202755908U Corrosion-resistant water injection well pipe column |
| 02/27/2013 | CN202755907U Drill pipe structure with big bit port |
| 02/27/2013 | CN202755902U Reverse circulation double-pipe injection negative pressure drilling bit |
| 02/27/2013 | CN102947533A High load universal joint for downhole rotary steerable drilling tool |
| 02/27/2013 | CN102943635A Diameter-changing and friction-reducing drill column centralizer |
| 02/27/2013 | CN102943634A Free-rotation impeller device for inhibiting eddy induced vibration of marine riser |
| 02/27/2013 | CN102943633A Threaded connection structure |
| 02/27/2013 | CN101832109B Casing protector for drilling |
| 02/27/2013 | CN101832108B Vacuum oil tubing coupling |
| 02/27/2013 | CN101802344B Connections for expandable tubulars |
| 02/27/2013 | CN101571035B Sawtooth thread of drill pipe joint |
| 02/26/2013 | US8381834 Drive system for interconnecting attachment devices and handheld rotary power tools |
| 02/26/2013 | US8381816 Flushing procedure for rotating control device |
| 02/26/2013 | CA2711468C High pressure pipe liner coupling assembly and method |
| 02/26/2013 | CA2646968C Drive shaft assembly for a downhole motor |
| 02/26/2013 | CA2537153C Improved seal |
| 02/26/2013 | CA2507909C Anti-rotation device for mating connectors and methods of using same |
| 02/21/2013 | WO2013025516A2 Debris barrier for hydraulic disconnect tools |
| 02/21/2013 | WO2013025366A1 Degradable no-go component |
| 02/21/2013 | WO2013025364A2 System for enabling selective opening of ports |
| 02/21/2013 | WO2012088102A4 Method and apparatus for milling a zero radius lateral window in casing |
| 02/21/2013 | US20130043076 Rotary Steerable Assembly Inhibiting Counterclockwise Whirl During Directional Drilling |
| 02/21/2013 | CA2844446A1 Debris barrier for hydraulic disconnect tools |
| 02/20/2013 | EP2559841A2 Valve for a downhole tool |
| 02/20/2013 | EP2558672A2 Ground-drilling device |
| 02/20/2013 | CN202745863U Device for controlling transverse vibration of drill column during reaming along with drill |
| 02/20/2013 | CN202745840U High-efficiency injection pipe string for large-inclination well |
| 02/20/2013 | CN202745839U Collar locator |
| 02/20/2013 | CN202745822U Anti-top-impact tool string for underground wireline operation in highly-deviated well |
| 02/20/2013 | CN202745816U Paraffin removal pipe column of flowing well |
| 02/20/2013 | CN202745798U Layered water injection centering packer of directional well |
| 02/20/2013 | CN202745755U Combination extension rod type water supply device |
| 02/20/2013 | CN202745735U Integral type multi-edge drill stem |
| 02/20/2013 | CN202745734U Automatic universal slope-regulating centering device of sucker rod |
| 02/20/2013 | CN202745733U 导向管 Guide tube |
| 02/20/2013 | CN202745732U Low friction sucker rod centering device |
| 02/20/2013 | CN202745731U Hydraulic centralizer |
| 02/20/2013 | CN202745730U Hydraulic centering device |
| 02/20/2013 | CN202745729U Reverse circulation coiled tubing centralizer |
| 02/20/2013 | CN202745728U Oil pipe and sleeve thread protector capable of preventing deforming, chapping and sticking at temperature of -46-66 DEG C, preventing breaking under tension of 5kg and preventing impact |
| 02/20/2013 | CN202745727U Manual combined oil pipe centering device |
| 02/20/2013 | CN202745726U Sucker rod protector |