| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 05/25/2011 | CN201843513U Double-liquid grouting pipe |
| 05/25/2011 | CN201843134U Two-way mixing pile |
| 05/25/2011 | CN201843132U Large-aperture deep-pile long-auger drilling rig |
| 05/25/2011 | CN1973093B Top tensioned riser |
| 05/25/2011 | CN102076926A Pipe connector device |
| 05/25/2011 | CN102071921A Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| 05/25/2011 | CN102071886A Drill rod of double helix anti-lock drill |
| 05/25/2011 | CN102071885A Antifriction and anti-adhesion abrasion reduction tool for drilling rig |
| 05/25/2011 | CN102071884A Columnar coupling compound sucker rod centralizer |
| 05/25/2011 | CN102071883A Underwater stand pipe vortex induced vibration inhibiter adopting rotatable cowling |
| 05/25/2011 | CN102071882A Hydraulic sleeve positioner |
| 05/25/2011 | CN102071881A Hermetic threaded joint of sleeve for gas well |
| 05/25/2011 | CN102071880A Anti-falling centering device for sucker rod |
| 05/25/2011 | CN102071879A Novel prestressed heat-insulation oil pipe |
| 05/25/2011 | CN102071366A High-toughness drilling rod applicable to corrosion acid environment and processing method thereof |
| 05/25/2011 | CN102071363A Steel for drill pipe body suitable for arctic-alpine areas |
| 05/25/2011 | CN102071361A Steel for high temperature resistant oil well tube and manufacturing method thereof |
| 05/25/2011 | CN101463712B Eccentric center-adjustable reducing stabilizer |
| 05/25/2011 | CN101260788B Superdeep well great displacement high performance boring tool protector for well |
| 05/24/2011 | US7948395 Downhole transmission system comprising a coaxial capacitor |
| 05/24/2011 | US7946360 Downhole drilling of a lateral hole |
| 05/24/2011 | CA2482743C Protective sleeve for threaded connections for expandable liner hanger |
| 05/19/2011 | WO2011059695A1 Non-rotating casing centralizer |
| 05/19/2011 | WO2011059694A1 Open hole non-rotating sleeve and assembly |
| 05/19/2011 | WO2011059342A2 Device and method for attaching an id-marker to a production pipe |
| 05/19/2011 | WO2011059340A2 Connecting device for kill/choke lines between a riser and a floating drilling vessel |
| 05/19/2011 | WO2011059337A1 Integrated high power umbilical |
| 05/19/2011 | WO2011058015A1 Jacking units and bellows for down hole intervention tools |
| 05/19/2011 | WO2011028432A3 Flexible catenary riser having distributed sag bend ballast |
| 05/19/2011 | WO2011028364A3 Apparatus and method for performing an intervention in a riser |
| 05/19/2011 | WO2011014565A3 Liner expansion system with a recoverable shoe assembly |
| 05/19/2011 | WO2011010016A3 Drill pipe and corresponding drill fitting |
| 05/19/2011 | WO2010120613A9 Apparatus for and method of securing a centralizer to a tubular |
| 05/19/2011 | US20110114390 Sleeve arrangement |
| 05/19/2011 | US20110114338 Non-rotating casing centralizer |
| 05/19/2011 | US20110114330 Combination Well Pipe Centralizer and Overpull Indicator |
| 05/19/2011 | US20110114307 Open hole non-rotating sleeve and assembly |
| 05/19/2011 | CA2785706A1 Jacking units and bellows for down hole intervention tools |
| 05/19/2011 | CA2749606A1 Non-rotating casing centralizer |
| 05/19/2011 | CA2749602A1 Open hole non-rotating sleeve and assembly |
| 05/18/2011 | CN201835824U Tubular column pressure testing device of oil drainage type sucker rod pump |
| 05/18/2011 | CN201835810U Rotary drilling rig one-key drilling control device |
| 05/18/2011 | CN201835794U Drainage and gas production simulation experiment device |
| 05/18/2011 | CN201835765U Wear-resistant bushing of non-magnetic drill collar |
| 05/18/2011 | CN201835764U Light load shock absorber of rod-pumped well |
| 05/18/2011 | CN201835763U Drill stem joint of oil and gas wells |
| 05/18/2011 | CN201835762U Connecting structure for oil pipe thread with thread pitch being 4.5teeth/inch |
| 05/18/2011 | CN201835761U Double-cone sleeve for connecting drill rods, |
| 05/18/2011 | CN201835760U Pipe string for solving clogging of pumping well |
| 05/18/2011 | CN201835759U High anti-collapse casing for oil-gas wells |
| 05/18/2011 | CN201835758U Aluminum-alloy double-wall drill pipe for reverse circulation drilling |
| 05/18/2011 | CN201835757U Aluminum alloy drill stem for geological drilling |
| 05/18/2011 | CN201835756U Bimetal composited tube |
| 05/18/2011 | CN201835740U Rotary drilling rig and drilling bucket drop preventing device thereof |
| 05/18/2011 | CN102066793A Drive shaft assembly for a downhole motor |
| 05/18/2011 | CN102066689A Pressure orienting swivel |
| 05/18/2011 | CN102066688A A force balancing system for use with a well bore tool |
| 05/18/2011 | CN102061893A Double shoulder tool joint |
| 05/18/2011 | CN102061892A Rotary drilling rig and drill rod assembly thereof |
| 05/18/2011 | CN102061891A Oil pumping polish rod |
| 05/18/2011 | CN102061888A Impact-resistant screw drill tool |
| 05/18/2011 | CN102061700A Semi-spiral drill pipe and pile forming method employing same |
| 05/18/2011 | CN101310091B Device for controlling slugging |
| 05/17/2011 | US7942216 Drill rod, drill bit, and drilling tool |
| 05/17/2011 | CA2547056C Improvement of resistance to fatigue of a threaded tubular connection |
| 05/17/2011 | CA2492318C Subsea and landing string distributed temperature sensor system |
| 05/17/2011 | CA2463867C Riser for connection between a vessel and a point at the seabed |
| 05/12/2011 | WO2011056809A2 Core lifter |
| 05/12/2011 | WO2011056308A1 Wellhead tubular connector |
| 05/12/2011 | WO2011056077A1 Lockable core barrel head for drilling system and survey instrument assembly provided with a connection link for arrangement in a drilling system |
| 05/12/2011 | WO2011055090A1 Stiffener for a flexible pipe |
| 05/12/2011 | WO2011055001A1 Method for coupling of a casing tube to a drill bit |
| 05/12/2011 | WO2011022257A3 Attachment of control lines to outside of tubular |
| 05/12/2011 | WO2010085287A3 Wired drill pipe having conductive end connections |
| 05/12/2011 | US20110108328 Ultra-hard drill collar |
| 05/12/2011 | US20110108288 Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors |
| 05/12/2011 | US20110108287 Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors |
| 05/12/2011 | US20110108286 Apparatus and Method for Controlling the Connection and Disconnection Speed of Downhole Connectors |
| 05/12/2011 | US20110108282 Apparatus and Method for Managed Pressure Drilling |
| 05/12/2011 | US20110108281 Method of providing buoyancy for a drilling riser |
| 05/12/2011 | DE102009050719A1 Gewindemuffe, Förderrohr und System auf Gewindemuffe und Förderrohr Threaded socket, pipe conveyor system and threaded sleeve and delivery pipe |
| 05/12/2011 | CA2791524A1 Method for drilling, in particular percussion or rotary percussion drilling, holes in soil or rock material, and device therefor |
| 05/12/2011 | CA2779932A1 Lockable core barrel head for drilling system and survey instrument assembly provided with a connection link for arrangement in a drilling system |
| 05/12/2011 | CA2779648A1 Method for coupling of a casing tube to a drill bit |
| 05/12/2011 | CA2779277A1 Core lifter |
| 05/11/2011 | EP2318746A1 Double-ended flexible pipe joint having stacked co-axial primary and secondary annular elastomeric flex elements |
| 05/11/2011 | EP2318641A1 Borehole casing centraliser |
| 05/11/2011 | EP2318636A1 Precision torque tool |
| 05/11/2011 | EP1825186B1 A pipe joint lubrication device |
| 05/11/2011 | CN201826803U Lubricator for polish rod of pumping well |
| 05/11/2011 | CN201826773U Oil well steel tube end coupling internal thread protection device |
| 05/11/2011 | CN201826772U Drill bit connecting device |
| 05/11/2011 | CN201826771U Air-tight anti-gluing drill pipe connector |
| 05/11/2011 | CN201826770U Percussion bit assembly for ground auger |
| 05/11/2011 | CN201826769U Connecting structure of transmission shaft of screw rod drilling tool and inner sleeve of lower radial sliding bearing |
| 05/11/2011 | CN201826768U Connecting structure for upper-end part of driving shaft of spiral drilling tool |
| 05/11/2011 | CN201826767U Tailor-made four-way of closed circulation heating device of double hollow sucker rod of shaft |
| 05/11/2011 | CN201826766U Bent shell of cardan shaft of screw drilling tool |
| 05/11/2011 | CN201826765U Combined drilling tool |
| 05/11/2011 | CN201826764U Directly-connected petroleum casing pipe |