| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 03/20/2013 | CN202810752U Water resistance device for drilling |
| 03/20/2013 | CN202810751U Well mouth sealing device of oil pumping unit |
| 03/20/2013 | CN202810750U Precast process fixing foundation pier |
| 03/20/2013 | CN202810749U Assembling type blowout-preventing pipe |
| 03/20/2013 | CN202810733U Rod pumped well wellhead packing adding and taking device |
| 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 | CN202803037U Positive/negative pressure vibration type dust removing system special for oil field |
| 03/20/2013 | CN102985637A Tubular severing system and method of using same |
| 03/20/2013 | CN102985318A System and method for subsea power distribution network |
| 03/20/2013 | CN102979481A Anti-blocking constant pressure switch of water injection string |
| 03/20/2013 | CN102979479A Electric plaster throwing device and use method thereof |
| 03/20/2013 | CN102979478A Water stopping device for water inrush borehole drilling |
| 03/20/2013 | CN102979477A Downhole electric control compression type packer |
| 03/20/2013 | CN102979476A BOP (blowout preventer) storage and transportation device for deep sea float type drilling well |
| 03/20/2013 | CN102979475A Orifice blowout prevention and water blocking system and water blocking process of orifice blowout prevention and water blocking system |
| 03/20/2013 | CN102979474A A control system for a subsea well |
| 03/20/2013 | CN102979472A Expansion hanger |
| 03/20/2013 | CN102979471A Anti-fall split slip hydraulic hanging packer |
| 03/20/2013 | CN102977870A Plugging cement slurry and igneous rock fracture developing well plugging method |
| 03/20/2013 | CN102977869A Underground high-pressure hydraulic fracturing hole sealing material for coal mine and hole sealing technology |
| 03/20/2013 | CN102977868A Hole sealing material for gas and blast drilling underground coal mine |
| 03/20/2013 | CN102080512B Multiposition one-way bypass connection structure for deep-water abandoned well cutting device |
| 03/20/2013 | CN102080511B Deepwater abandoned well cutting device having cementing plug and operation method of cementing plug thereof |
| 03/20/2013 | CN101975041B Well cementing method for avoiding coal bed and device thereof |
| 03/19/2013 | US8399387 Settable compositions comprising cement kiln dust and rice husk ash and methods of use |
| 03/19/2013 | US8397825 Hydraulic lubricating system and method of use thereof |
| 03/19/2013 | US8397820 Method and apparatus for wellbore fluid treatment |
| 03/19/2013 | US8397813 Device for a test plug |
| 03/19/2013 | US8397804 Expandable device for use in a well bore |
| 03/19/2013 | US8397803 Packing element system with profiled surface |
| 03/19/2013 | US8397802 Swellable packer slip mechanism |
| 03/19/2013 | CA2690142C In situ determination of critical desorption pressures |
| 03/19/2013 | CA2667156C Degradable material assisted diversion |
| 03/19/2013 | CA2378541C Using of stokes law cement slurries for improved well cementation |
| 03/19/2013 | CA2377347C Cementing spacers for improved well cementation |
| 03/16/2013 | CA2789859A1 Gravel pack and sand disposal device |
| 03/14/2013 | WO2013036446A1 Method of deploying nanoenhanced downhole article |
| 03/14/2013 | WO2013036420A1 Load-sharing ram packer for ram type blowout preventers |
| 03/14/2013 | WO2013036390A1 Swelling acceleration using inductively heated and embedded particles in a subterranean tool |
| 03/14/2013 | WO2013036288A1 Annular seal for expanded pipe with one way flow feature |
| 03/14/2013 | WO2013034378A1 Subsea docking station |
| 03/14/2013 | WO2012151265A3 Locking assembly for mechanically set packer |
| 03/14/2013 | WO2012090056A4 Downhole packer tool with antifracture means |
| 03/14/2013 | WO2012042269A3 Blowout preventer blade assembly and method of using same |
| 03/14/2013 | WO2012042268A3 Blowout preventer blade assembly and method of using same |
| 03/14/2013 | WO2012027001A3 Independent guide string hanger |
| 03/14/2013 | US20130064604 Methods and systems for co2 sequestration |
| 03/14/2013 | US20130062540 Load-Sharing Ram Packer for Ram Type Blowout Preventers |
| 03/14/2013 | US20130062077 Methods and equipment to improve reliability of pinpoint stimulation operations |
| 03/14/2013 | US20130062073 Packer Assembly with a Standoff |
| 03/14/2013 | US20130062067 Method of deploying nanoenhanced downhole article |
| 03/14/2013 | US20130062066 Multi-Zone Screened Fracturing System |
| 03/14/2013 | US20130062063 Completing a multi-stage well |
| 03/14/2013 | US20130062062 System and method for a slotted liner shoe extension |
| 03/14/2013 | US20130062061 Methods and systems for zonal isolation in wells |
| 03/14/2013 | US20130062051 Probless Packer and Filter Systems |
| 03/14/2013 | US20130062049 Shaped memory polyphenylene sulfide (pps) for downhole packer applications |
| 03/14/2013 | CA2847696A1 Swelling acceleration using inductively heated and embedded particles in a subterranean tool |
| 03/14/2013 | CA2846856A1 Petroleum well intervention winch system |
| 03/13/2013 | EP2568108A1 A control system for a subsea well |
| 03/13/2013 | CN202790024U Anti-theft collar clamp of oil-water well |
| 03/13/2013 | CN202789474U Alarm control device for hydraumatic blowout-preventing controller in petroleum drilling |
| 03/13/2013 | CN202788779U High-hole-density perforation sand-controlling device |
| 03/13/2013 | CN202788746U Drilling tool device for drilling, grouting and wall protection |
| 03/13/2013 | CN202788745U Pneumatic cement head |
| 03/13/2013 | CN202788744U Auxiliary tool for expansion pipe |
| 03/13/2013 | CN202788743U Pressure stabilization bag device |
| 03/13/2013 | CN202788742U Well-control priming bypass manifold |
| 03/13/2013 | CN202788741U Completion tool free of drilling and plugging |
| 03/13/2013 | CN202788740U Touch-and-press-free switch device of cementing well |
| 03/13/2013 | CN202788739U High pressure water inrush point non-pressure plugging structure |
| 03/13/2013 | CN202788738U Self-compensating heat stress sectioning and packing machine |
| 03/13/2013 | CN202788737U Twin-stage sealing packer for staged fracturing of sidetrack horizontal well |
| 03/13/2013 | CN202788736U Two-way pressure-bearing packer |
| 03/13/2013 | CN202788735U Seat sealing ball seat specially used for slim-hole horizontal well |
| 03/13/2013 | CN202788734U Underground tubing plug |
| 03/13/2013 | CN202788733U Draw plate type pneumatic hole closing device |
| 03/13/2013 | CN202788732U Blowout preventer used in oil well testing |
| 03/13/2013 | CN202788731U Siphoning type blowout-control pressing cap for water injection well testing |
| 03/13/2013 | CN202788730U Side door oil cylinder of hydraulic ram preventer |
| 03/13/2013 | CN202788729U Multifunctional sucker rod hanging blowout preventer |
| 03/13/2013 | CN202788728U Cup sealing device for pressure test of blowout preventers |
| 03/13/2013 | CN202788727U Pilot four-flashboard blowout preventer |
| 03/13/2013 | CN202788726U Integrated diversity oil extraction wellhead device |
| 03/13/2013 | CN202788725U Metal hard sealing oil tube head |
| 03/13/2013 | CN202788724U Sealing adjustment device for leakage of wellhead oil cup |
| 03/13/2013 | CN202788723U Quick-detachment sucker rod self-sealing blowout preventer |
| 03/13/2013 | CN202788722U Blowout-prevention tool string for pressure energy storage workover rig |
| 03/13/2013 | CN202788721U Retractable type horn mouth device for oilfield drilling |
| 03/13/2013 | CN202788720U Pipe-in-pipe steam injection wellhead device |
| 03/13/2013 | CN202788719U Quick sealing self-explosion bag in drilling |
| 03/13/2013 | CN202788709U Sealing and stringing device for sleeve of oil-water well |
| 03/13/2013 | CN202788702U Anchor for fixing open hole staged fracturing stringstand pipe |
| 03/13/2013 | CN202788662U Simple and easy polish rod deviation adjusting device |
| 03/13/2013 | CN202788647U Reducing blowout-preventing nipple |
| 03/13/2013 | CN202788638U Cased hole completion multistage cracking horizontal well multistage segmentation release water exploration pipe column |
| 03/13/2013 | CN102971484A Mitigating leaks in production tubulars |
| 03/13/2013 | CN102966371A Drainage borehole plugging device and method |
| 03/13/2013 | CN102966370A Drainage borehole plugging device and method |
| 03/13/2013 | CN102966329A Drainage borehole plugging device and method |