| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 03/20/2013 | CN202810682U Coupling positioning device of sucker rod |
| 03/20/2013 | CN202810681U Square-threaded safety connector |
| 03/20/2013 | CN202810680U Well drilling combination device using double-wall drill pipe |
| 03/20/2013 | CN202810679U Anti-corrosion and wear-resistant sucker rod |
| 03/20/2013 | CN202810678U Underground coal mine smooth surface drill rod |
| 03/20/2013 | CN202810677U Oil gas well down-hole tubular column short section with adjustable length |
| 03/20/2013 | CN202810676U Water stopping sleeve structure for water detection and drainage in coal mine |
| 03/20/2013 | CN202810675U Mechanical water plugging string for multiple water outlet points of perforated casing completion multi-section fractured horizontal well |
| 03/20/2013 | CN202810657U Spiral redressing and expanding tool |
| 03/20/2013 | CN202809599U Forward-backward cement-soil mixing pile machine |
| 03/20/2013 | CN102985635A Driver for torque and rotation transfer from a rotational chuck to a drill steel |
| 03/20/2013 | CN102979497A Device and method for immovable-string type packer-free sliding-sleeve hydraulic-jet pulsed acid fracturing |
| 03/20/2013 | CN102979464A Centering device |
| 03/20/2013 | CN102979463A Damping device for cutting drilling machine unit head |
| 03/20/2013 | CN102061892B Rotary drilling rig and drill rod assembly thereof |
| 03/20/2013 | CN102041965B Coal mine underground over-broken abnormal zone drilling method |
| 03/20/2013 | CN102003152B Lip type reversing coupling double-spiral blade type vortex induced vibration restraining device for deep sea vertical pipe |
| 03/19/2013 | US8397840 Replaceable wear band for well drill pipe |
| 03/19/2013 | US8397828 Spoolable downhole control system and method |
| 03/19/2013 | US8397814 Perforating string with bending shock de-coupler |
| 03/19/2013 | US8397800 Perforating string with longitudinal shock de-coupler |
| 03/19/2013 | CA2390054C Method for manufacturing continuous sucker rod |
| 03/14/2013 | WO2013036932A1 Helical bend restrictor |
| 03/14/2013 | WO2013034574A1 Method for connecting a flexible line to a structure of a fluid exploitation installation and associated connection device |
| 03/14/2013 | WO2013022691A3 Multilateral location and orientation assembly |
| 03/14/2013 | WO2012161910A3 Window joint for lateral wellbore construction and method for opening same |
| 03/14/2013 | WO2012142543A3 System and method for coupling an impregnated drill bit to a whipstock |
| 03/14/2013 | WO2012087514A3 Downhole release joint with radially expandable member |
| 03/14/2013 | WO2012077132A3 Turbulence free ring |
| 03/14/2013 | WO2012047562A3 Welded downhole components and method of forming same |
| 03/14/2013 | WO2012025461A3 Tubular threaded connection |
| 03/14/2013 | US20130062075 Hydraulically Actuated Standoff |
| 03/14/2013 | CA2850709A1 Drill string tubular component |
| 03/13/2013 | EP2568107A1 Multiple Control Line Assembly for Downhole Equipment |
| 03/13/2013 | EP2567057A1 Safety system for deep water drilling units using a dual blow out preventer system |
| 03/13/2013 | CN202788789U Heat-sensitive casing pipe thermal stress compensator |
| 03/13/2013 | CN202788772U Flexible oil sleeve contactor |
| 03/13/2013 | CN202788664U Telescopic long spiral drilling rod |
| 03/13/2013 | CN202788663U Ball cage type universal shaft of screw drill |
| 03/13/2013 | CN202788662U Simple and easy polish rod deviation adjusting device |
| 03/13/2013 | CN202788661U Energy-saving protector for oil extraction rod |
| 03/13/2013 | CN202788660U Paraffin removing and eccentric-wear preventing device of hollow rod |
| 03/13/2013 | CN202788659U Multifunctional protector for sucker rod |
| 03/13/2013 | CN202788658U Hydraulic centralizer driving hydraulic cylinder |
| 03/13/2013 | CN202788657U Superhigh pressure flow channel middle righting device in underground supercharging speeding-up system |
| 03/13/2013 | CN202788656U Underground-mine prospecting and well-logging centralizer |
| 03/13/2013 | CN202788655U Rotational flow casing centralizer used for complex well |
| 03/13/2013 | CN202788654U Sleeve perforation joint of abandoned oil well |
| 03/13/2013 | CN202788653U Hermetic seal thread connection device used for SEW oil casings |
| 03/13/2013 | CN202788652U Seal structure of screwed nipple |
| 03/13/2013 | CN202788651U Flange interface of multistage drill rod |
| 03/13/2013 | CN202788650U Anti-drop connector of sucker rod |
| 03/13/2013 | CN202788649U Self-lubrication and eccentric wearing prevention coupling for sucker rod |
| 03/13/2013 | CN202788648U Device for mounting tail tube to electric pump |
| 03/13/2013 | CN202788647U Reducing blowout-preventing nipple |
| 03/13/2013 | CN202788646U Coupling for coal-bed gas well |
| 03/13/2013 | CN202788645U Novel oil extraction tubular column of oil field |
| 03/13/2013 | CN202788644U Novel flow string |
| 03/13/2013 | CN202788643U Hot dipping multi-element zinc alloy bushing |
| 03/13/2013 | CN202788642U Portable and pluggable drill rod |
| 03/13/2013 | CN202788641U Novel torque pumping polished rod |
| 03/13/2013 | CN202788640U Backwater-proof alloy drill rod |
| 03/13/2013 | CN202788639U Detach-free manifold for normal or reverse circulation well flushing |
| 03/13/2013 | CN202788638U Cased hole completion multistage cracking horizontal well multistage segmentation release water exploration pipe column |
| 03/13/2013 | CN202788637U Drill pipe water supplying device |
| 03/13/2013 | CN202788610U Down-hole hammer sleeve follow-up drilling machine |
| 03/13/2013 | CN202788604U Drive shaft assembly of positive displacement motor |
| 03/13/2013 | CN102966314A Horizontal well central pipe and water control method thereof |
| 03/13/2013 | CN102966313A Marine riser ocean flow response surface additional layer |
| 03/13/2013 | CN102966304A Mud retaining wall and air down-the-hole hammer drilling tool and drilling technology |
| 03/13/2013 | CN102966094A Method for constructing concrete pile through rotary excavating and pressure irrigation |
| 03/13/2013 | CN102966072A Construction method for treating widened and heightened engineering joint surfaces of dikes on soft clay foundation |
| 03/13/2013 | CN102031933B Serial anti-fall centralizer |
| 03/13/2013 | CN101644144B Transverse shock absorber applicable in gas drilling |
| 03/13/2013 | CN101360945B tubular threaded joints and its female element, and method for determining effect of scratching energy absorbing device |
| 03/12/2013 | US8393417 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment |
| 03/12/2013 | CA2772895C Floating sub tool |
| 03/12/2013 | CA2545565C Device which is expandable to engage the interior of a tube |
| 03/12/2013 | CA2516445C Load-resistant coaxial transmission line |
| 03/07/2013 | WO2013033684A1 Drill-pipe tool-joint |
| 03/07/2013 | WO2013033196A2 Identification tags and systems suitable for thin-walled components |
| 03/07/2013 | WO2013032987A1 Piping system having an insulated annulus |
| 03/07/2013 | WO2013032604A2 Resettable lock for a subterranean tool |
| 03/07/2013 | WO2013032588A1 Multi-position mechanical spear for multiple tension cuts with releasable locking feature |
| 03/07/2013 | WO2013032560A1 Methods and apparatus for increasing the reach of coiled tubing |
| 03/07/2013 | WO2013032343A1 Apparatus for preparation and lubrication of a threaded portion of a drill pipe |
| 03/07/2013 | WO2013030599A1 A connector arrangement for a subsea pipeline |
| 03/07/2013 | WO2013012992A3 Adjustable mudline tubing hanger suspension system |
| 03/07/2013 | WO2012177460A3 Production system and method of varying restrictions to flow along the same |
| 03/07/2013 | WO2012167045A3 Anti-back off device for down hole tools and drive systems |
| 03/07/2013 | WO2012112668A8 Surface close proximity wells |
| 03/07/2013 | WO2012076703A3 Riser coupling |
| 03/07/2013 | WO2012074854A9 Remotely accessible subsea strain sensor assemblies and methods |
| 03/07/2013 | WO2012014068A3 Flex joint for downhole drilling applications |
| 03/07/2013 | WO2011143043A3 Downhole electrical coupler for electrically operated wellbore pumps and the like |
| 03/07/2013 | US20130056283 System and Method for Vibration in a Drill String |
| 03/07/2013 | US20130056282 Running tool with independent housing rotation sleeve |
| 03/07/2013 | US20130056225 Methods and apparatus for increasing the reach of coiled tubing |
| 03/07/2013 | US20130056223 Downhole torque limiter and method |
| 03/07/2013 | CA2846458A1 A connector arrangement for a subsea pipeline |