| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/25/2008 | US7347286 Drill string valve assembly |
| 03/25/2008 | US7347282 Steerable soil penetration system |
| 03/25/2008 | US7347259 Downhole oilfield erosion protection by using diamond |
| 03/25/2008 | US7347258 Coated tools for use in oil well pipes |
| 03/25/2008 | CA2537930C Production of natural gas from hydrates |
| 03/25/2008 | CA2494237C Drill tool shaft-to-housing locking device |
| 03/25/2008 | CA2240058C Coupling device for a drive assembly |
| 03/25/2008 | CA2226530C Fluid line with integral conductor |
| 03/20/2008 | WO2008033268A1 Production of hydrogen from underground coal gasification |
| 03/20/2008 | WO2008033078A1 Arrangement at rock drilling |
| 03/20/2008 | WO2008032112A1 Well construction and completion |
| 03/20/2008 | WO2007134059B1 Downhole swivel apparatus and method |
| 03/20/2008 | US20080066964 Method and apparatus for indexing between selected columns in a drill rod magazine |
| 03/20/2008 | US20080066930 Protective Sleeve For Expandable Tubulars |
| 03/20/2008 | US20080066929 Protective Sleeve For Expandable Tubulars |
| 03/20/2008 | US20080066927 Protective sleeve for threaded connections for expandable tubulars |
| 03/20/2008 | US20080066926 Protective sleeve for threaded connections for expandable liner hanger |
| 03/20/2008 | US20080066922 Method and Arrangement by a Workover Riser Connection |
| 03/20/2008 | US20080066901 Box end sucker rod shear coupling |
| 03/20/2008 | CA2663495A1 Coiled tubing wellbore drilling and surveying using a through the drill bit apparatus |
| 03/19/2008 | EP1900901A1 Flexible tubing for rotary-percussive drilling device |
| 03/19/2008 | EP1899574A1 Well having inductively coupled power and signal transmission |
| 03/19/2008 | EP1611385B8 Tubing and piping for multiphase flow |
| 03/19/2008 | EP1282757B1 Subsea riser disconnect and method |
| 03/19/2008 | CN201037383Y Horizontal well ball type centralizer |
| 03/19/2008 | CN201037382Y Petroleum thick wall sheath capable of reducing connected screw stress centralization |
| 03/19/2008 | CN201037381Y Water and wind dual-purpose drill pipe capable of jointing |
| 03/19/2008 | CN101144374A Pumping rod centralizer |
| 03/19/2008 | CN101144373A Rolling wheel centralizer for gas drilling |
| 03/19/2008 | CN101144372A Sticking-resistant petroleum sleeve joint |
| 03/19/2008 | CN101144371A Pumping rod connecting device |
| 03/19/2008 | CN100375829C Method for producing J55-grade steel for petroleum casing based on electric furnace sheet billet continuous casting an rolling process |
| 03/19/2008 | CA2601152A1 Box end sucker rod shear coupling |
| 03/18/2008 | US7344162 Pipe joint |
| 03/18/2008 | US7343983 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 03/18/2008 | US7343979 Method and device for the controlled disconnection of a wireline |
| 03/18/2008 | CA2456020C Locking swivel apparatus with a supplemental internal locking mechanism |
| 03/18/2008 | CA2215503C Thermosetting composition, its uses and a flexible, unfoldable preform containing this composition |
| 03/15/2008 | CA2599836A1 Hydrocarbon application hose |
| 03/13/2008 | WO2008030754A1 Optical wet connect |
| 03/13/2008 | WO2007144719A3 Expandable downhole tool |
| 03/13/2008 | US20080060817 Production tubing hydraulic release mechanism |
| 03/13/2008 | US20080060816 Wellhead seal unit |
| 03/13/2008 | US20080060815 Wellhead seal unit |
| 03/13/2008 | US20080060803 Casing Shoes and Methods of Reverse-Circulation Cementing of Casing |
| 03/13/2008 | CA2596633A1 Flexible tubing for rotary percussion drilling device |
| 03/12/2008 | EP1898044A2 Annulus pressure control drilling systems and methods |
| 03/12/2008 | EP1896760A1 A fluid coupling |
| 03/12/2008 | EP1706575B1 Drill bit with protection member |
| 03/12/2008 | CN101139915A Casing milling salvaging adaptor for oil well |
| 03/11/2008 | US7341281 Connector for high-pressure riser |
| 03/11/2008 | US7341119 Hydro-lifter rock bit with PDC inserts |
| 03/11/2008 | US7341117 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 03/11/2008 | US7340819 Field weldable connections |
| 03/11/2008 | CA2421707C Constant force actuator |
| 03/11/2008 | CA2234207C Conduit and continuous coiled tubing system |
| 03/07/2008 | CA2600602A1 Annulus pressure control drilling systems and methods |
| 03/06/2008 | WO2008027649A1 Dry fiber wrapped pipe |
| 03/06/2008 | WO2008027047A1 Removable coil in pipe sections of a downhole tubular |
| 03/06/2008 | US20080059073 Methods and apparatus for handling and drilling with tubulars or casing |
| 03/06/2008 | US20080056826 Device For Upper Connection Between Two Submarine Fluid Transporting Pipelines |
| 03/06/2008 | US20080053705 Steerable bit system assembly and methods |
| 03/06/2008 | US20080053659 Method of Inhibiting Hydrate Formation |
| 03/06/2008 | US20080053653 Helical rod guide and method |
| 03/05/2008 | CN201031689Y Centralizer for bore mud pulse drill following batter level |
| 03/05/2008 | CN201031638Y Lift sub auxiliary loop special for internal joint hoop oil passageway |
| 03/05/2008 | CN201031637Y Rolling wheel ball rigidity casing tube centralizer |
| 03/05/2008 | CN201031636Y Rotary type centralizer |
| 03/05/2008 | CN201031635Y Anti-wear device for preventing oil pumping machine polish rod and packing from wearing |
| 03/05/2008 | CN201031634Y Radial variable casing tube centralizer |
| 03/05/2008 | CN201031633Y Cambered surface type centering guide for sucker rod |
| 03/05/2008 | CN201031632Y Oil well bolt wear reducing and vibration reducing automatic revolver |
| 03/05/2008 | CN201031631Y Rotary corrector for sucker rod |
| 03/05/2008 | CN201031630Y Hydraulic telescopic type stabilizers |
| 03/05/2008 | CN201031629Y Horizontal well heat picking casing head |
| 03/05/2008 | CN201031628Y Anti-releasing device for sucker rod |
| 03/05/2008 | CN201031627Y Anti-corrosive wear resistant oil passageway |
| 03/05/2008 | CN201031626Y Super-high intensity side inserting type losing stop type anti-twist integral pumping rod |
| 03/05/2008 | CN201031625Y Super-high intensity side insert type losing stop anti-twist pumping rod |
| 03/05/2008 | CN101135234A Screw pump flow string trip preventer |
| 03/04/2008 | US7337841 Casing comprising stress-absorbing materials and associated methods of use |
| 02/28/2008 | WO2008024809A1 Annular electrical wet connect |
| 02/28/2008 | WO2008024793A1 Method for logging after drilling |
| 02/28/2008 | WO2008024791A2 Releasing and recovering tool |
| 02/28/2008 | US20080047754 Passive vertical drilling motor stabilization |
| 02/28/2008 | US20080047716 System and method for forming a coiled tubing connection |
| 02/28/2008 | US20080047714 High pressure large bore utility line connector assembly |
| 02/28/2008 | US20080047703 Annular electrical wet connect |
| 02/28/2008 | CA2661342A1 Method for logging after drilling |
| 02/28/2008 | CA2661169A1 Releasing and recovering tool |
| 02/27/2008 | EP1892449A1 Threaded joint for steel pipes |
| 02/27/2008 | EP1718841B1 Annular pressure relief collar |
| 02/27/2008 | EP1583886A4 Isolated electrical connection in a drill string |
| 02/27/2008 | CN201027504Y Correcting tool for center pull rod of drilling pump |
| 02/27/2008 | CN201027503Y Long-acting, spin automatic bias-wearing preventing device |
| 02/27/2008 | CN201027502Y Abrasion-proof corrosion resistant sucker-rod coupling |
| 02/27/2008 | CN201027501Y Blowout preventing kill-well joint of artesian well |
| 02/27/2008 | CN201027500Y Ductile cast integral formed oil boring hose |
| 02/27/2008 | CN201027499Y Improved screw connection drill rod |
| 02/27/2008 | CN201027498Y Fast connection device for individual well harvesting of oil field on sea |