| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/27/2013 | CN202832277U Continuous oil tube with wall thickness gradually varied |
| 03/27/2013 | CN202832276U Coiled tubing with zones with different intensity |
| 03/27/2013 | CN202832275U Novel drill collar capable of reducing thread maximum stress |
| 03/27/2013 | CN202832274U Device of suction assistance and load reduction |
| 03/27/2013 | CN202832273U Centralizer |
| 03/27/2013 | CN202832272U Sheet type centralizer convenient to replace |
| 03/27/2013 | CN202832271U Rigidity idler wheel centering device |
| 03/27/2013 | CN202832270U Combined protective cylinder |
| 03/27/2013 | CN202832269U Cable-passable centralizer dedicated for electric submersible pump |
| 03/27/2013 | CN202832268U Self-dissolution millable centralizer |
| 03/27/2013 | CN202832267U Environment-friendly self-sealing double-centering protection device |
| 03/27/2013 | CN202832266U Drill rod rotation supporting protection device |
| 03/27/2013 | CN202832265U Sealing structure of threaded connector |
| 03/27/2013 | CN202832264U Long nose counter bending specialized screwed joint for thickened oil thermal production well |
| 03/27/2013 | CN202832263U Main sealing structure with double spherical faces on coupling face |
| 03/27/2013 | CN202832262U Sleeve joint with pace |
| 03/27/2013 | CN202832261U Petroleum casing joint |
| 03/27/2013 | CN202832260U Safety joint for drilling |
| 03/27/2013 | CN202832259U Rotary type anti-abrasion joint |
| 03/27/2013 | CN202832258U Multitube coaxial oil tube coupling |
| 03/27/2013 | CN202832257U Torsion reducing and wear resisting connector |
| 03/27/2013 | CN202832256U Oil field surface pipeline connector |
| 03/27/2013 | CN202832255U Jaw-type hollow uncoupling device |
| 03/27/2013 | CN202832254U Joint hoop |
| 03/27/2013 | CN202832253U High-temperature high-pressure transmission logging male connector |
| 03/27/2013 | CN202832252U Transmission well logging butt joint tool capable of being used under high temperature and high pressure |
| 03/27/2013 | CN202832251U Wire transmission device for connecting thread joint |
| 03/27/2013 | CN202832250U Portable energy-saving rotary excavating drill stem |
| 03/27/2013 | CN202832249U Drilling rod for fixing rail |
| 03/27/2013 | CN202832248U Drilling rod with movable wearing-resisting ring of rotary drilling rig |
| 03/27/2013 | CN202832247U Anti-tripping water power pressure device |
| 03/27/2013 | CN202832246U Super-thick multi-hole high-squeezing-resistant casing |
| 03/27/2013 | CN202832245U Triangular hollow steel pipe |
| 03/27/2013 | CN202832244U Triangular-prism-shaped drill rod |
| 03/27/2013 | CN202832243U Continuous oil tube with wall thickness gradually varied |
| 03/27/2013 | CN202832242U Installation pipe end cutting device for sleeve pipe |
| 03/27/2013 | CN202832214U Drilling tool |
| 03/27/2013 | CN202832204U Variable diameter stabilizer |
| 03/27/2013 | CN103003519A Enhanced smear effect fracture plugging process for drilling systems |
| 03/27/2013 | CN103003515A Traveling and locking centralizer |
| 03/27/2013 | CN102996103A Co-well extracting-pouring device adopting downhole oil-water separation for large-dimension sleeve of offshore oil well |
| 03/27/2013 | CN102996081A Drill device of drilling machine |
| 03/27/2013 | CN102996080A Abrasion-resistant sleeve of drilling machine |
| 03/27/2013 | CN102996079A Tubular air sealing screwed joint and application thereof |
| 03/27/2013 | CN102996078A Dustproof rock drilling machine |
| 03/27/2013 | CN102337845B Protection method for rotary drilling rig, controller, protection device and rotary drilling rig |
| 03/27/2013 | CN102261261B Drilling and reflection reducing integrated device for tectonic coal development area |
| 03/27/2013 | CN102230363B Device and method for drilling and forming hole in coal rock in structural belt |
| 03/27/2013 | CN102061888B Impact-resistant screw drill tool |
| 03/27/2013 | CN101775962B Active shock absorber for oil drilling |
| 03/27/2013 | CN101641542B Super high torque dope-free threaded joint |
| 03/26/2013 | US8407006 Multiple distributed force measurements |
| 03/26/2013 | US8403078 Methods and apparatus for wellbore construction and completion |
| 03/26/2013 | US8403066 Control line hybrid junction assembly |
| 03/26/2013 | US8403065 Fluid connection to drilling riser |
| 03/26/2013 | US8403059 External jet pump for dual gradient drilling |
| 03/21/2013 | WO2013039575A1 Methods and systems for circulating fluid within the annulus of a flexible pipe riser |
| 03/21/2013 | WO2013039406A1 Collar |
| 03/21/2013 | WO2013038072A1 Assembly for producing a threaded joint for the drilling and operation of hydrocarbon wells, and resulting threaded joint |
| 03/21/2013 | WO2013037706A2 Downhole gauge assembly |
| 03/21/2013 | WO2013037058A1 Drill pipe with replaceable tool joints |
| 03/21/2013 | WO2013037002A1 Redeployable subsea manifold-riser system |
| 03/21/2013 | WO2012156735A3 Perforating drill string assembly |
| 03/21/2013 | US20130069364 Threaded connection |
| 03/21/2013 | US20130068532 Three-way flow sub for continuous circulation |
| 03/21/2013 | US20130068483 Composite Limit Collar |
| 03/21/2013 | US20130068473 Pressure controlled well construction and operation systems and methods usable for hydrocarbon operations, storage and solution mining |
| 03/21/2013 | US20130068465 Methods and systems for circulating fluid within the annulus of a flexible pipe riser |
| 03/21/2013 | US20130068464 Methods, systems and apparatus for circulating fluid within the annulus of a flexible pipe riser |
| 03/21/2013 | US20130068451 Tools and Methods for Use in Completion of a Wellbore |
| 03/21/2013 | US20130068449 Laser cladding fe-cr alloy on downhole tools |
| 03/21/2013 | CA2848708A1 Methods and systems for circulating fluid within the annulus of a flexible pipe riser |
| 03/21/2013 | CA2848452A1 Methods, systems and apparatus for circulating fluid within the annulus of a flexible pipe riser |
| 03/21/2013 | CA2848114A1 Drill pipe with replaceable tool joints |
| 03/21/2013 | CA2848011A1 Assembly for producing a threaded joint for the drilling and operation of hydrocarbon wells, and resulting threaded joint |
| 03/20/2013 | EP2569503A2 Downhole electrical coupler for electrically operated wellbore pumps and the like |
| 03/20/2013 | CN202811961U Two-way disconnected titanium alloy slice spring |
| 03/20/2013 | CN202810843U Righting type well bottom sampling guiding head |
| 03/20/2013 | CN202810818U High-pressure wear-resistant manifold assembly |
| 03/20/2013 | CN202810815U Mechanical lifting technology tubular column of steam assisted gravity drainage (SAGD) production well |
| 03/20/2013 | CN202810793U Sucker rod centralizing paraffin scraping device |
| 03/20/2013 | CN202810779U Self-grouting underground connecting joint |
| 03/20/2013 | CN202810742U Slide valve device of oil well casing subsidy machine |
| 03/20/2013 | CN202810726U Triangular drill rod dust extractor |
| 03/20/2013 | CN202810698U Triangular friction welding drill rod with transitional circle |
| 03/20/2013 | CN202810697U Downhole pipeline anti-corrosion bracelet type positive pole |
| 03/20/2013 | CN202810696U Well drilling roller short circuit |
| 03/20/2013 | CN202810695U Centralizer |
| 03/20/2013 | CN202810694U Screw type stabilizer on rotary drill |
| 03/20/2013 | CN202810693U 套管稳定器 Stabilizer bushings |
| 03/20/2013 | CN202810692U Rotational flow casing centralizer capable of improving well cementation quality |
| 03/20/2013 | CN202810691U Antifriction resistance reducing short connection for well drilling |
| 03/20/2013 | CN202810690U Safety connector with zigzag thread |
| 03/20/2013 | CN202810689U Mining drill pipe |
| 03/20/2013 | CN202810688U Precision casting idler wheel short joint |
| 03/20/2013 | CN202810687U Continuous tube well-drilling connector |
| 03/20/2013 | CN202810686U Anchoring type multilateral well window height adjusting pup joint |
| 03/20/2013 | CN202810685U Non-rotating joint for coiled tubing drilling |
| 03/20/2013 | CN202810684U Joint connection structure of expansion pipes for oil wells |
| 03/20/2013 | CN202810683U Fastening connector for engineering drill pipe |