| Patents for E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800) |
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| 01/23/2013 | CN202689966U High-reliability threaded connection structure of oil well pipe |
| 01/23/2013 | CN202689965U Air-tight seal oil pipe threaded joint applied to high-temperature and high-pressure gas well |
| 01/23/2013 | CN202689964U Casing thread connecting structure for heat production well |
| 01/23/2013 | CN202689963U Threaded connection structure of anti-galling double taper pipe |
| 01/23/2013 | CN202689962U Three-edge drilling rod |
| 01/23/2013 | CN202689961U High-sealing-performance threaded connection structure of oil well pipe |
| 01/23/2013 | CN202689960U Tubing pressure test water injection spindle and quick-change connector component |
| 01/23/2013 | CN202689959U Tubular component and joint of drill pipe |
| 01/23/2013 | CN202689958U Arc-shaped ribbed drill rod with isodiametric central holes |
| 01/23/2013 | CN202689957U Multi-structure threaded casing string for heavy oil thermal recovery wells |
| 01/23/2013 | CN202689956U Cellular drill rod connection device |
| 01/23/2013 | CN202689955U Anti-channeling wear-resistant casing for oil well |
| 01/23/2013 | CN202689949U Multifunctional PDC (Polycrystalline Diamond Compact) bit |
| 01/23/2013 | CN202689942U PDC (Polycrystalline Diamond Compact) bit used for oil drilling |
| 01/23/2013 | CN202689930U Drill-close full-rotating vertically drilling tool |
| 01/23/2013 | CN202689924U Drilling device of bottom plate of coal mine tunnel |
| 01/23/2013 | CN102889060A Drill clamp mechanism and jackdrill |
| 01/23/2013 | CN101832131B Surface real-time processing of downhole data |
| 01/23/2013 | CN101832099B Special drilling machine applied to coal mine getting working face |
| 01/23/2013 | CN101479440B Tubular member connection method, device and system |
| 01/23/2013 | CN101235704B Rotary drive assembly for a drill rod |
| 01/22/2013 | CA2701909C Apparatus and method for ratcheting stimulation tool |
| 01/20/2013 | CA2783442A1 Rotating flow control devices having stabilized bearings |
| 01/20/2013 | CA2782084A1 A wire access line drum assembly |
| 01/17/2013 | WO2013009312A1 Methods and systems for controlling torque transfer from rotating equipment |
| 01/17/2013 | WO2013007404A1 Extraction assembly including an information module |
| 01/17/2013 | WO2013007026A1 Disconnector of downhole tool |
| 01/17/2013 | WO2013006963A1 Internal riser rotating flow control device |
| 01/17/2013 | WO2012101402A3 Composite bow centralizer |
| 01/17/2013 | WO2012010480A3 Drill pipe |
| 01/17/2013 | WO2012006455A3 Torque enhanced threaded connection |
| 01/17/2013 | WO2012001426A3 Retrievable subsea device and method |
| 01/17/2013 | US20130014997 Post Hole Digger |
| 01/17/2013 | US20130014991 Drilling system and method of operating a drilling system |
| 01/17/2013 | US20130014954 Subsea Connector with a Split Clamp Latch Assembly |
| 01/17/2013 | CA2841609A1 Internal riser rotating flow control device |
| 01/17/2013 | CA2841254A1 Methods and systems for controlling torque transfer from rotating equipment |
| 01/16/2013 | EP2546453A1 Dc powered subsea inverter |
| 01/16/2013 | EP2545243A2 Cablehead |
| 01/16/2013 | CN202673187U Rotating homing type guiding shoe |
| 01/16/2013 | CN202673186U Branch well drillable well completion guiding shoe |
| 01/16/2013 | CN202673185U Supporting block type casing centralizer |
| 01/16/2013 | CN202673184U Swirl centralizer for removing cuttings bed in well drilling process |
| 01/16/2013 | CN202673183U Replaceable sleeve eccentric stabilizer |
| 01/16/2013 | CN202673182U Automatic tubular column support device |
| 01/16/2013 | CN202673181U A novel sucker rod centering device |
| 01/16/2013 | CN202673180U Rigid spiral idler wheel centering device |
| 01/16/2013 | CN202673179U Coiled tubing delivering perforation torsion release short joint |
| 01/16/2013 | CN202673178U High-sealing buttress threaded conduit connecting joint |
| 01/16/2013 | CN202673177U High sealing partial trapezoidal thread casing pipe connector |
| 01/16/2013 | CN202673176U Special thread casing joint connector with high resistance to squeeze |
| 01/16/2013 | CN202673175U High seal special buttress thread sleeve pipe connector |
| 01/16/2013 | CN202673174U High seal special buttress thread pipe connector |
| 01/16/2013 | CN202673173U Double-shoulder gas-sealing threaded joint for casing tube with tube outer diameter of 200.03mm |
| 01/16/2013 | CN202673172U Locking device used for rapid replacement and connection of principal shaft and main drilling rod |
| 01/16/2013 | CN202673171U Threaded-type riser joint |
| 01/16/2013 | CN202673170U Breechblock type riser joint |
| 01/16/2013 | CN202673169U Multiphase-flow flow adjusting device |
| 01/16/2013 | CN202673168U Sucker rod uncoupling device |
| 01/16/2013 | CN202673167U Three-arris drill pipe special for coal mine underground gas drainage |
| 01/16/2013 | CN202673154U Drill bit used for mixing pile machine and mixing pile machine |
| 01/16/2013 | CN202673141U Mount type integrated hydraulic rock driller |
| 01/16/2013 | CN102881401A Casing degaussing instrument and method |
| 01/16/2013 | CN102877809A Seal fishing mechanism for tubing collar |
| 01/16/2013 | CN102877799A Cardan joint for rotary drilling rig |
| 01/16/2013 | CN102877798A Multi-tube coaxial tubing coupling |
| 01/16/2013 | CN102877797A Elevator-step free directional crossing dedicated tool joint |
| 01/16/2013 | CN102877796A Guide sleeve for drill rod of rotary drill rig |
| 01/16/2013 | CN102877795A Inserted joint casing for drilling machine |
| 01/16/2013 | CN102877791A Drill bit and drilling device |
| 01/16/2013 | CN102877782A Rotary drilling rig and bittern collecting method |
| 01/16/2013 | CN101858196B Low gravity center three-axle spiral drilling machine and drilling method thereof |
| 01/15/2013 | CA2677345C In-situ molded non-rotating drill pipe protector assembly |
| 01/15/2013 | CA2600602C Annulus pressure control drilling systems and methods |
| 01/15/2013 | CA2505556C Steerable drill bit arrangement |
| 01/15/2013 | CA2502165C Bottom hole assembly |
| 01/10/2013 | WO2013005899A1 Rod for a bedrock boring apparatus |
| 01/10/2013 | WO2013004478A2 Inductive connection |
| 01/10/2013 | WO2013003939A1 Cement head with hammer union |
| 01/10/2013 | WO2013003919A1 Metal tx seal |
| 01/10/2013 | WO2012151146A3 Single upset landing string running system |
| 01/10/2013 | WO2012148979A3 Systems and methods for making subsea fluid conduit connections |
| 01/10/2013 | WO2012138813A3 Roller standoff assemblies |
| 01/10/2013 | WO2012138126A3 Rod mounting device for drilling machine |
| 01/10/2013 | WO2012101401A3 Composite bow centralizer |
| 01/10/2013 | WO2012004235A3 Method for preventing the escape of environmentally harmful substances in underwater drilling operations and pipe string therefor |
| 01/10/2013 | WO2011134636A3 Drilling or extraction pipe string |
| 01/10/2013 | US20130008682 Battery for a power tool |
| 01/10/2013 | US20130008662 Clamping arrangement |
| 01/10/2013 | US20130008645 Intelligent Well System And Method |
| 01/09/2013 | EP2542751A2 Super shoe swell packer |
| 01/09/2013 | CN202659218U Oil lubrication oil-pumping device |
| 01/09/2013 | CN202659174U Single-cone single-screw twist drill |
| 01/09/2013 | CN202659173U Guiding and correcting device for formed hole of bored pile of diving drilling machine |
| 01/09/2013 | CN202659172U Triple-connection spiral centering device |
| 01/09/2013 | CN202659171U Anti-scaling and anti-eccentric wear multi-functional nipple for scaling and eccentric wear rod pumped well |
| 01/09/2013 | CN202659170U Thin-wall drill base table type joint |
| 01/09/2013 | CN202659169U Drilling rod joint with teeth-shaped threads |
| 01/09/2013 | CN202659168U Rotary joint for horizontal directional drilling machines |
| 01/09/2013 | CN202659167U Telescoping mechanism applicable to detection of multi-aperture tubing coupling |