| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 12/27/2006 | CN2851513Y Anti-shock transmission shaft assembly |
| 12/27/2006 | CN2851512Y Break-proof tool for swab line |
| 12/27/2006 | CN2851511Y Diameter-variable screwed joint structure of petroleum casing pipe |
| 12/27/2006 | CN2851510Y Anticorrosion sucker rod coupling |
| 12/27/2006 | CN2851509Y Antiwear sucker rod coupling |
| 12/27/2006 | CN2851508Y Anti-break and anti-falling sucker rod |
| 12/27/2006 | CN2851507Y Heat-conductive coiled sucker rod |
| 12/27/2006 | CN2851506Y Short joint and oil pipe made by friction-welding |
| 12/27/2006 | CN1886573A Drill bit with protection member |
| 12/27/2006 | CN1884787A Method for producing J55-grade steel for petroleum casing based on electric furnace sheet billet continuous casting an rolling process |
| 12/27/2006 | CN1884609A High Cr series stainless steel jointless oil well tube and its production method |
| 12/26/2006 | US7152700 Dual wall drill string assembly |
| 12/26/2006 | US7152699 Connection rod and method for production thereof |
| 12/26/2006 | US7152686 Downhole weight bearing apparatus and method |
| 12/26/2006 | US7152685 Method and apparatus for deploying a line in coiled tubing |
| 12/26/2006 | US7152674 Disconnect devices |
| 12/21/2006 | WO2005120196A3 Disassembleable washer device for down-hole drills |
| 12/21/2006 | WO2005084376A3 Rotating systems associated with drill pipe |
| 12/21/2006 | US20060283367 Water intake riser |
| 12/20/2006 | EP1733118A1 Clamping apparatus, drill string component and rock drilling rig |
| 12/20/2006 | EP1733117A2 Coupler and roof drill bit assembly using such coupler |
| 12/20/2006 | EP1307632B1 Cleaning and doping of tubulars |
| 12/20/2006 | CN2849682Y Fast sensor for polishing rod load of pumping unit |
| 12/20/2006 | CN2849126Y Quincunx twisting clamp centralizer |
| 12/20/2006 | CN2849125Y Multifunction oil pumping rod connecting hoop centralizer |
| 12/20/2006 | CN2849124Y Retractable screw pump oil pumping rod antiloosing device |
| 12/20/2006 | CN2849123Y Multipurpose roller square complementary core |
| 12/20/2006 | CN2849122Y New type oil rod guiding connector |
| 12/20/2006 | CN2849121Y Conical screw thread tripositioning oil pumping rod connecting hoop special for screw pump oil extraction |
| 12/20/2006 | CN2849120Y Drill bar |
| 12/19/2006 | US7151377 Permanent apparatus for monitoring a well by injecting current through the casing into the formations |
| 12/19/2006 | US7150479 Modular thread connection with high fatigue resistance |
| 12/19/2006 | US7150329 Auto-extending/retracting electrically isolated conductors in a segmented drill string |
| 12/19/2006 | CA2339964C Marine riser having variable buoyancy |
| 12/15/2006 | CA2689858A1 Modular connector and method |
| 12/14/2006 | US20060280560 Riser tensioner with shrouded rods |
| 12/14/2006 | US20060279078 Joining Tubular Members |
| 12/14/2006 | US20060278440 Downhole stabilizer |
| 12/14/2006 | US20060278414 Device for rock bolting and for automized rock bolting and rock bolting |
| 12/14/2006 | US20060278403 Bore-lining tubing |
| 12/14/2006 | US20060278388 Electrically controlled release device |
| 12/13/2006 | EP1730663A2 Providing a local response to a local condition in an oil well |
| 12/13/2006 | EP1730386A2 Rotating systems associated with drill pipe |
| 12/13/2006 | EP1730382A1 Method and device for drilling holes in the ground or in rock |
| 12/13/2006 | EP1556577B1 Device for connecting two elements having a substantially cylindrical or tubular shape |
| 12/13/2006 | EP1438479B1 Liquid seal for wet roof bit |
| 12/13/2006 | EP1339939B1 A drilling tool used in horizontal drilling applications |
| 12/13/2006 | EP1334257B1 Jar with electrical conductor |
| 12/13/2006 | CN2846711Y Low wear resistance centralizer for horizontal directional drilling well |
| 12/13/2006 | CN2846710Y Rod positioning centralizing anti-inclination device |
| 12/13/2006 | CN2846709Y Strong sleeve shaping variable diameter joint |
| 12/13/2006 | CN2846708Y Intelligent joint for oil well electric pump separate production |
| 12/13/2006 | CN2846500Y Reinforcing device for flexible drilling road bed |
| 12/13/2006 | CN1877075A Long-lasting low-resistance sucker rod centralizer manufacturing method |
| 12/13/2006 | CN1289847C Tubular threaded joint capable of being subjected to diametral expansion |
| 12/13/2006 | CN1289782C Releasable connector and application thereof |
| 12/13/2006 | CN1289781C Expandable drilling shoe |
| 12/13/2006 | CN1289780C Packer for hydraulic underreamer |
| 12/13/2006 | CA2510281A1 Downhole stabilizer |
| 12/12/2006 | US7147254 Coupling apparatus |
| 12/12/2006 | US7147065 Connection design and sonde housing assembly for a directional drill |
| 12/12/2006 | US7147059 Use of downhole high pressure gas in a gas-lift well and associated methods |
| 12/12/2006 | US7147052 Hyraulically releasable inflation tool for permanent bridge plug |
| 12/12/2006 | US7146704 Method for coupling connectors using an anti-rotation device |
| 12/12/2006 | US7146702 Method and apparatus for forming a mono-diameter wellbore casing |
| 12/12/2006 | CA2388241C Underreamer and method of use |
| 12/08/2006 | CA2550150A1 Sucker rod guide installer |
| 12/07/2006 | WO2006060290A3 Locking dog and locking pin assembly for use therewith |
| 12/07/2006 | WO2005094508A3 Deflection swivel and method |
| 12/07/2006 | US20060273584 Device which is expandable to engage the interior of a tube |
| 12/07/2006 | US20060272808 Rotary pump stabilizer |
| 12/07/2006 | DE102006022157A1 Lifting cap for plastic pipes, comprises a rod located in the circumferential groove of a sleeve |
| 12/06/2006 | EP1728843A1 Friction reducing composition and method |
| 12/06/2006 | EP1727961A1 Method and system for starting up a pipeline |
| 12/06/2006 | EP1727960A1 Downhole apparatus for mobilising drill cuttings |
| 12/06/2006 | EP1373678B1 Downhole axial force generating tool |
| 12/06/2006 | CN2844403Y Protective drilling-rod filter |
| 12/06/2006 | CN2844399Y Conical-tube locking stabilizer |
| 12/06/2006 | CN2844398Y Anti-falling and wear-resisting device of sucker rod |
| 12/06/2006 | CN2844397Y Metal to metal double-pipe secondary sealer |
| 12/06/2006 | CN2844396Y Sliding vibration absorber |
| 12/06/2006 | CN2844395Y Two-stage and two-action damper |
| 12/06/2006 | CN2844394Y Mechanical rotary joint for extracting oil well |
| 12/06/2006 | CN2844393Y Two-way protective sucker-rod connected hoop |
| 12/06/2006 | CN2844392Y Cone threaded polish rod against torsional moment |
| 12/06/2006 | CN2844221Y Stabilizer |
| 12/06/2006 | CN1873041A Steel in use for fire resistant, heat insulated oil line, and preparation method |
| 12/06/2006 | CN1288324C Improved pipeline installed with electric connection wire insert pipeline and having transportation functions, and manufacturing and using method thereof |
| 12/05/2006 | US7145473 Electromagnetic borehole telemetry system incorporating a conductive borehole tubular |
| 12/05/2006 | US7144048 Composite marine riser |
| 12/05/2006 | US7143848 Downhole tool |
| 12/05/2006 | US7143825 Expandable wellbore stabiliser |
| 12/05/2006 | CA2428171C Wired pipe joint with current-loop inductive couplers |
| 12/05/2006 | CA2413913C Fracture and wear resistant rock bits |
| 12/05/2006 | CA2296148C Centralizer |
| 11/30/2006 | WO2006127718A1 Apparatus with strake elements and methods for installing strake elements |
| 11/30/2006 | WO2006109090A3 Downhole swivel sub |
| 11/30/2006 | US20060269357 Rotating shaft coupling assembly |
| 11/30/2006 | US20060266556 Drilling apparatus, method, and system |
| 11/30/2006 | US20060266538 Power tool |