| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 05/29/2001 | US6237702 Hydraulic underreamer and sections for use thereof |
| 05/29/2001 | US6237683 Wellbore flow control device |
| 05/29/2001 | CA2202319C Roller stabilizer |
| 05/29/2001 | CA2147311C Fluid holdup tool for deviated wells |
| 05/24/2001 | US20010001633 Emergency dump apparatus for buoyancy air tanks on buoyant riser systems |
| 05/24/2001 | US20010001420 Oil well separation method and apparatus |
| 05/23/2001 | EP1101057A1 Multi-start wedge thread for tubular connection |
| 05/23/2001 | EP1101056A1 Threaded and coupled connection for improved fatigue resistance |
| 05/23/2001 | EP1101014A1 Drill pipe protection rings |
| 05/23/2001 | EP0960299B1 Tubular end connection using snap ring |
| 05/23/2001 | CN2431396Y Nylon centralising device for fixing sucker rod |
| 05/23/2001 | CN1295898A Drilling tool |
| 05/22/2001 | US6234719 Mobile combined drilling and piling machine and method for tubular foundation with machine |
| 05/17/2001 | WO2001034936A1 Tube connection |
| 05/17/2001 | WO2001025589A8 Packer system |
| 05/17/2001 | DE19954315A1 Drilling tool especially for drilling rock has socket area for cutting plate and two opposing guide areas with guide section parallel to drilling direction but off-set by ninety degrees for accurate centring and alignment |
| 05/16/2001 | EP1099133A1 Optical fiber cable for use in harsh environments |
| 05/16/2001 | EP1099071A2 Pipe connection |
| 05/16/2001 | CN2430538Y High connection strength round thread connection structure for oil field sleeve and oil pipe |
| 05/16/2001 | CN2430537Y Overtaking pipe string anchoring device |
| 05/16/2001 | CN2430536Y Thick wall oil pipe |
| 05/16/2001 | CN2430535Y Multiple section self locking telescopic drill rod |
| 05/16/2001 | CN1295645A Rotating connector with compensating unit |
| 05/15/2001 | US6231265 Self-aligning subsea latch mechanism |
| 05/15/2001 | US6230828 Rotary drilling bits for directional drilling exhibiting variable weight-on-bit dependent cutting characteristics |
| 05/15/2001 | US6230812 Side pocket mandrel |
| 05/15/2001 | US6230796 System and device for optimizing use and installation of auxiliary equipment for down hole operations in wells |
| 05/15/2001 | CA2009734C Device in impact machines |
| 05/11/2001 | CA2325061A1 Drilling tool |
| 05/10/2001 | WO2001033032A1 Disconnectable and reconnectable wet connector |
| 05/10/2001 | WO2001033029A2 Sub sea bottom hole assembly change out system and method |
| 05/10/2001 | WO2001033028A2 Apparatus, system, and method for installing and retrieving pipe in a well |
| 05/10/2001 | US20010000885 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability |
| 05/09/2001 | EP1098064A1 Auger drilling device |
| 05/09/2001 | EP1097287A1 Floating spar for supporting production risers |
| 05/09/2001 | CN1294655A Thread joint for percussive drilling, male and female portion for forming part of joint and method for mfg. product having thread for forming part of thread joint for percussive drilling |
| 05/09/2001 | CN1294654A Method and device and linking surface to seabed for submarine pipeline |
| 05/08/2001 | USRE37167 Fatigue resistant drill pipe |
| 05/08/2001 | US6227313 Anti-torque tool |
| 05/08/2001 | US6227312 Drilling system and method |
| 05/08/2001 | US6227292 Flexible sinker bar assemblies |
| 05/08/2001 | US6227138 System for anchoring ships |
| 05/08/2001 | CA2106754C Positioning device for a member and drilling-direction control device for a drilling system employing said positioning device |
| 05/05/2001 | CA2325164A1 Pbr with tec bypass and wet disconnect/connect feature |
| 05/03/2001 | WO2001031163A1 Sleeve for stiffening an output shaft on a mill |
| 05/03/2001 | WO2001031162A1 Drill string with interference fit couplings and couplers therfor |
| 05/03/2001 | WO2001031160A1 Method and apparatus for operations in underground/subsea oil and gas wells |
| 05/03/2001 | WO2001030646A1 Suspension device for a riser |
| 05/03/2001 | US20010000718 Floating offshore drilling/producing structure |
| 05/03/2001 | US20010000591 Bit torque limiting device |
| 05/03/2001 | CA2392820A1 Drill string with interference fit couplings and couplers therfor |
| 05/01/2001 | US6224112 Casing slip joint |
| 05/01/2001 | US6223840 Cutting bed impeller |
| 05/01/2001 | US6223839 Hydraulic underreamer and sections for use therein |
| 05/01/2001 | US6223838 Auger system |
| 05/01/2001 | US6223826 Auto-extending/retracting electrically isolated conductors in a segmented drill string |
| 05/01/2001 | US6223672 Ultrashort fairings for suppressing vortex-induced-vibration |
| 04/28/2001 | CA2287681A1 Interference fit coupling and method of application for same |
| 04/26/2001 | WO2001029476A1 Threaded tubular joint proof to external pressure |
| 04/26/2001 | WO2001029373A1 Method of drilling a wellbore with disengageable couplers |
| 04/26/2001 | WO2001029364A1 Underreamer and method of use |
| 04/26/2001 | WO2001029362A1 Positioning and conveying well apparatus and method |
| 04/25/2001 | EP1094194A2 Coiled tubing with an electrical cable for a down-hole pumping system and methods for manufacturing and installing such a system |
| 04/25/2001 | EP1094193A2 Dual riser assembly |
| 04/25/2001 | EP1093540A1 Method and multi-purpose apparatus for control of fluid in wellbore casing |
| 04/25/2001 | EP0928360B1 Drill shank for a drill drive |
| 04/25/2001 | CN2427618Y Broken-proof joint for drilling rod |
| 04/25/2001 | CN1065018C Screw joint for oil pipe and casing pipe |
| 04/24/2001 | US6220373 Drill rod with axial air passageway and method of making same |
| 04/24/2001 | US6220372 Apparatus for drilling lateral drainholes from a wellbore |
| 04/24/2001 | US6220363 Wellhead isolation tool and method of using same |
| 04/24/2001 | US6220362 Conduit and cable bypass for downhole tools |
| 04/24/2001 | US6220351 System to lower the depth equipment in hydrocarbons wells |
| 04/24/2001 | US6220303 Device for limiting the bending radius of a flexible duct |
| 04/24/2001 | US6220079 Annular fluid manipulation in lined tubular systems |
| 04/24/2001 | CA2171178C Tool for maintaining wellbore penetration |
| 04/19/2001 | WO2001027435A1 Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools |
| 04/19/2001 | WO2001027434A2 Drill string member with bearings |
| 04/19/2001 | WO2001026839A1 Method and apparatus for detecting wear at connections between pin and box joints |
| 04/19/2001 | WO2000077431A3 Expandable connector |
| 04/19/2001 | CA2385443A1 Drill string member with bearings |
| 04/18/2001 | CN1292074A Heat insulating device and method for insulating at least a submarine pipeline at great depth |
| 04/18/2001 | CN1292058A Threaded assembly of metal tubes designed to contain corrosive fluid |
| 04/18/2001 | CN1064733C Rock drilling tool, drill bit and method of transferring percussive energy |
| 04/17/2001 | US6216802 Gravity oriented directional drilling apparatus and method |
| 04/17/2001 | US6216779 Downhole tool actuator |
| 04/12/2001 | WO2001025667A1 Composite coiled tubing end connector and pipe-to-pipe connector |
| 04/12/2001 | WO2001025652A2 Torque transmission system for helical drilling tools |
| 04/12/2001 | WO2001025590A2 Cable protection in blow-out preventers |
| 04/12/2001 | WO2001025589A1 Packer system |
| 04/12/2001 | US20010000202 Bit torque limiting device |
| 04/12/2001 | CA2759974A1 Composite coiled tubing end connector and pipe-to-pipe connector |
| 04/12/2001 | CA2386605A1 Cable protection in blow-out preventers |
| 04/11/2001 | EP1091084A1 Improved slick line system with real-time surface display |
| 04/11/2001 | EP1044314A4 Drilling system including eccentric adjustable diameter blade stabilizer |
| 04/10/2001 | US6213685 Mechanical boot system |
| 04/10/2001 | US6213230 Drilling tool especially for the rotary percussion drilling of preferably rock |
| 04/10/2001 | US6213229 Drilling motor drill bit reaming stabilizer |
| 04/10/2001 | US6213226 Directional drilling assembly and method |
| 04/10/2001 | US6213206 Hydraulically releasable coupling |