| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 01/19/2011 | CN201714378U Acoustic system device for sonic logging |
| 01/19/2011 | CN201714341U High efficiency hot washing anti-pollution pipe string |
| 01/19/2011 | CN201714319U Drill collar supporting hydraulic manipulator |
| 01/19/2011 | CN201714318U Eccentric wear prevention rotary type centralizer for pumping rod and oil pipe of screw pump in oilfield |
| 01/19/2011 | CN201714317U Down-the-hole drilling rig centering device |
| 01/19/2011 | CN201714316U Rubber shock absorber |
| 01/19/2011 | CN201714315U Improved round thread air-tight seal connecting structure |
| 01/19/2011 | CN201714314U Oil pipe threaded connector |
| 01/19/2011 | CN201714313U Anti-corrosion tube provided with alloy layers |
| 01/19/2011 | CN201714293U Semi-ring transmission shaft assembly of screw drilling tool |
| 01/19/2011 | CN201713579U Oil pipe corrosion prevention device utilizing cathodic protection by adopting sacrificial anode |
| 01/19/2011 | CN101952545A Method and system for fracturing subsurface formations during the drilling thereof |
| 01/19/2011 | CN101949269A Safety joint for switching off hydraulic pressure |
| 01/19/2011 | CN101949268A Rotating joint |
| 01/19/2011 | CN101949267A Drill rod connecting hoop |
| 01/19/2011 | CN101949266A Inner rotor type rotary joint |
| 01/19/2011 | CN101949262A Combined drilling device |
| 01/18/2011 | US7871222 Truss semi-submersible offshore floating structure |
| 01/18/2011 | CA2439331C Method of stabilizing a downhole drilling motor and a downhole drilling motor |
| 01/13/2011 | WO2011005519A2 Downhole tool with roller screw assembly |
| 01/13/2011 | WO2011005517A2 Through tubing intelligent completion and method |
| 01/13/2011 | WO2010120677A3 Resilient anchor |
| 01/13/2011 | WO2010120567A3 Methods for forming boring shoes for wellbore casing, and boring shoes and intermediate structures formed by such methods |
| 01/13/2011 | WO2010111368A3 Control line retention and method for retaining control line |
| 01/13/2011 | US20110005836 Stabilizer subs for use with expandable reamer apparatus,expandable reamer apparatus including stabilizer subs and related methods |
| 01/13/2011 | US20110005776 Improved centraliser |
| 01/13/2011 | US20110005767 Riser system comprising pressure control means |
| 01/13/2011 | US20110005766 Deployment System |
| 01/12/2011 | EP2273060A2 Coupling apparatus |
| 01/12/2011 | EP2273059A1 Coupling apparatus |
| 01/12/2011 | EP2273058A2 Apparatus, system and method for communicating while logging with wired drill pipe |
| 01/12/2011 | EP2271817A1 Compound engagement profile on a blade of a down-hole stabilizer and methods therefor |
| 01/12/2011 | CN201705276U Well completion and flow string of horizontal well |
| 01/12/2011 | CN201705258U Fishable bottom plug with elastic claw for expansion pipe |
| 01/12/2011 | CN201705257U Expansion pipe running assorted tool for patching of horizontal well casings |
| 01/12/2011 | CN201705249U Continuous jet blockage-removing string for horizontal wells |
| 01/12/2011 | CN201705239U Detachable circuit seal structure |
| 01/12/2011 | CN201705238U Pump cable oil tube centralizer |
| 01/12/2011 | CN201705237U Columnar coupler composite sucker rod centralizer |
| 01/12/2011 | CN201705236U Eccentric wear prevention oil increase device with self-rotating pumping rod |
| 01/12/2011 | CN201705235U Wear preventing device for sucker rod and oil tube |
| 01/12/2011 | CN201705234U Casing protector for drilling well |
| 01/12/2011 | CN201705233U Screw pump driving rod centralizer |
| 01/12/2011 | CN201705232U Clamp sucker rod centralizer with abrasion-resistant centralizing sleeve |
| 01/12/2011 | CN201705231U Deep sucker rod load reducing device |
| 01/12/2011 | CN201705230U Special threading connector for sleeve with small external diameter |
| 01/12/2011 | CN201705229U Safety joint of expandable casing |
| 01/12/2011 | CN201705228U Shock absorber of sucker rod |
| 01/12/2011 | CN201705227U Inflation tail pipe hanger safety releasing mechanism |
| 01/12/2011 | CN201705226U Integral type double-shoulder sulfur resistant drill rod |
| 01/12/2011 | CN201705225U High-twisting-resistance double-circular-bead drilling rod joint |
| 01/12/2011 | CN201705224U Quickly-connecting pup joint for pipelines |
| 01/12/2011 | CN201705223U Small casing pipe well oil pipe |
| 01/12/2011 | CN201705222U Completion pipe string of pumping well of rod pump |
| 01/12/2011 | CN201705221U Drill stem with thickened inner thread edge joint |
| 01/12/2011 | CN201705220U Drill rod with wear-resisting alloy layer on outer wall of internal thread joint |
| 01/12/2011 | CN201705219U Lateral drilling gravel pack completion string |
| 01/12/2011 | CN201705218U Tubing string with thick oil underground returning thermal production blockage technique |
| 01/12/2011 | CN201705217U Torque transfer expansion device |
| 01/12/2011 | CN201705216U Clamping spring type fishable bottom plug for expansion pipe |
| 01/12/2011 | CN201705215U Carbon fiber composite enhanced sleeve |
| 01/12/2011 | CN201705214U Multi-arris hot-melt coating wearable drilling rod |
| 01/12/2011 | CN201705210U Anhydrous labor exploration drill |
| 01/12/2011 | CN201705202U Improved roller bit drilling machine |
| 01/12/2011 | CN101946056A Drill packer member, drill pipe, and corresponding drill pipe string |
| 01/12/2011 | CN101942973A Hydraulic casing centralizer |
| 01/12/2011 | CN101942972A Balancer for protecting joint |
| 01/12/2011 | CN101942971A Elastic expansion device |
| 01/12/2011 | CN101235708B Sucker rod centralizer sliding bush |
| 01/11/2011 | US7867330 Method for composing a nano-particle metal treatment composition for creating a ceramic-metal layer |
| 01/11/2011 | US7866708 Joining tubular members |
| 01/11/2011 | US7866706 Threaded joint for steel pipe |
| 01/11/2011 | US7866404 Tubular member connection |
| 01/11/2011 | US7866399 Apparatus and method for managed pressure drilling |
| 01/11/2011 | US7866384 Downhole device |
| 01/11/2011 | CA2494229C Adjustable downhole tool |
| 01/07/2011 | CA2708877A1 Retention means for a seal boot used in a universal joint in a downhole motor driveshaft assembly |
| 01/06/2011 | WO2011002841A2 Hydraulically locking stabilizer |
| 01/06/2011 | WO2011002609A1 Open ended industrial pipe cap |
| 01/06/2011 | WO2011000033A1 Drill head assembly |
| 01/06/2011 | WO2010084353A3 Apparatus and method for setting a downhole anchor and related telescopic joint |
| 01/06/2011 | US20110000665 Hydraulically Locking Stabilizer |
| 01/06/2011 | CA2766168A1 Hydraulically locking stabilizer |
| 01/05/2011 | EP2268894A2 Flow restrictor |
| 01/05/2011 | EP2268887A1 Inertia transition pipe element in particular for fixing a rigid submarine pipe |
| 01/05/2011 | DE102006056663B4 Gewindeverbindung für Bohrgestänge Threaded connection for drill pipe |
| 01/05/2011 | CN201696270U Sand settlement prevention device and oil pumping pipeline system |
| 01/05/2011 | CN201696040U Spot sampling device |
| 01/05/2011 | CN201696018U Maritime shipborne movable steaming connection meal hose |
| 01/05/2011 | CN201695979U Jam release fishing tool suitable for corroded and deformed oil pipe |
| 01/05/2011 | CN201695963U Automatic centralizing anti-wear body of sucker rod |
| 01/05/2011 | CN201695962U Centralizer of sucker rod |
| 01/05/2011 | CN201695961U Oil pumping unit polished rod deviation adjusting device |
| 01/05/2011 | CN201695960U Wear-resistant collar of sucker rod |
| 01/05/2011 | CN201695959U Lengthened polished rod for oil well |
| 01/05/2011 | CN201695958U Drill stem with hexagonal joints |
| 01/05/2011 | CN201695957U Drill rod |
| 01/05/2011 | CN201695952U Rotary drilling rig and flat head device thereof |
| 01/05/2011 | CN201695941U Hand-held optical cable mark-burying drill |
| 01/05/2011 | CN101936139A Integrated wind-blade spiral drilling rod for air pressure drilling |