| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 05/01/2013 | CN202914014U Medicine adding blowout preventer for gas well |
| 05/01/2013 | CN202914013U Anti-spraying device used for petroleum drilling |
| 05/01/2013 | CN202914012U Electromagnet blowout prevention box |
| 05/01/2013 | CN103080464A A rapid kill method for blowout wells |
| 05/01/2013 | CN103080463A Preloading device |
| 05/01/2013 | CN103075516A Segmented seal ring and support of same |
| 05/01/2013 | CN103075179A Entitative coal seam gas drainage drilling hole double-pipe drainage method |
| 05/01/2013 | CN103075149A Method and device for quickly determining gas pressure of coal bed in downward superdeep borehole |
| 05/01/2013 | CN103075148A Method and device for fast measuring coal bed gas pressure through upward remote-distance hole drilling |
| 05/01/2013 | CN103075138A Staged fracturing and staged oil production integrated string for horizontal well |
| 05/01/2013 | CN103075128A Method for sealing gas extraction drill holes |
| 05/01/2013 | CN103075127A Device and method for sealing drill hole by flexible filling material |
| 05/01/2013 | CN103075126A Wedge type reusing setting and deblocking packer |
| 05/01/2013 | CN103075125A Pressure balancing device |
| 05/01/2013 | CN103075124A Oil field wellhead with protection installation |
| 05/01/2013 | CN102061153B Crude oil emulsifying agent for water plugging of oil well and preparation method thereof |
| 05/01/2013 | CN101864921B Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
| 05/01/2013 | CN101863643B Hydrophobic gel composite cement and plugging method thereof |
| 04/30/2013 | CA2729922C Downhole tool with multiple material retaining ring |
| 04/30/2013 | CA2645920C Low heat of hydration cement compositions and methods of using same |
| 04/30/2013 | CA2582275C Self-cleaning well control fluid |
| 04/25/2013 | WO2013059430A1 Subsea pressure reduction system |
| 04/25/2013 | WO2013058972A1 Control systems and methods for subsea activities |
| 04/25/2013 | WO2013056859A1 Methods for installing and retrieving a well monitoring apparatus |
| 04/25/2013 | WO2013056858A1 Plug sensor |
| 04/25/2013 | WO2013056857A1 Plug sensor |
| 04/25/2013 | WO2013056719A1 Subsea production system with multiple location master control station system |
| 04/25/2013 | WO2013022724A3 Reorienting annular debris barrier |
| 04/25/2013 | WO2012178214A3 Pump drain arrangements for packer systems and methods for sampling underground formations using same |
| 04/25/2013 | WO2012166928A3 Downhole tools having radially expandable seat member |
| 04/25/2013 | WO2012148956A3 Flange overshot retrieval tool |
| 04/25/2013 | WO2012148955A3 Flange separation and retrieval tool |
| 04/25/2013 | WO2012121745A3 Metal chevron axial seal |
| 04/25/2013 | WO2012087541A3 Modular fracture plug and method of construction thereof |
| 04/25/2013 | WO2012052721A3 Apparatus and methods for restricting flow in a bore |
| 04/25/2013 | WO2012034984A3 Stable subsea electric power transmission to run subsea high speed motors |
| 04/25/2013 | WO2012009536A3 Low density cementitious compositions using limestone |
| 04/25/2013 | US20130099449 Seal |
| 04/25/2013 | US20130098635 Receptacle sub |
| 04/25/2013 | US20130098628 Subsea pressure reduction system |
| 04/25/2013 | US20130098613 Geothermal well diversion agent formed from in situ decomposition of carbonyls at high temperature |
| 04/25/2013 | US20130098611 Alkaline persulfate for low-temperature breaking of polymer viscosified fluid |
| 04/25/2013 | US20130098600 Manufacturing Technique for a Composite Ball for Use Downhole in a Hydrocarbon Wellbore |
| 04/25/2013 | CA2852660A1 Method for installing and retrieving a well monitoring apparatus |
| 04/25/2013 | CA2852659A1 Plug sensor |
| 04/24/2013 | EP2582909A2 Controlling well operations based on monitored parameters of cement health |
| 04/24/2013 | EP2582908A2 Method and apparatus for closing or securing a well |
| 04/24/2013 | CN202903604U Rubber sleeve for bridge plugs and packer and rubber sleeve assembly test device |
| 04/24/2013 | CN202900562U Pressure regulation pump for downhole hole sealing double acting piston |
| 04/24/2013 | CN202900221U Thickened oil steam huff and puff injection-extraction integrated device |
| 04/24/2013 | CN202900205U Multifunctional formation testing well completion integral pipe column |
| 04/24/2013 | CN202900194U Packing and sand control tool for secondary treatment of open-hole screen pipe of horizontal well |
| 04/24/2013 | CN202900172U Blowout prevention device conveying sliding block driving device used for offshore drilling platform |
| 04/24/2013 | CN202900155U Star bit strip-type silk mouth grouting pipe |
| 04/24/2013 | CN202900154U Gel plugging agent infusing filtering device |
| 04/24/2013 | CN202900153U Machine and tool of slip casting |
| 04/24/2013 | CN202900152U Bidirectional slip packer |
| 04/24/2013 | CN202900151U Hydraulic fracturing packer |
| 04/24/2013 | CN202900150U Well flushing type step-by-step deblocking packer |
| 04/24/2013 | CN202900149U Pass-type oil pipe plug for snubbing operation |
| 04/24/2013 | CN202900148U Blanking plug of well kill pipe column |
| 04/24/2013 | CN202900147U Simple packer |
| 04/24/2013 | CN202900146U Lead seal packer |
| 04/24/2013 | CN202900145U Device for downhole inorganic hole sealing thin material hole sealing |
| 04/24/2013 | CN202900144U Hole sealing device for coal bed bedding hole |
| 04/24/2013 | CN202900143U Combined-type sucker rod blowout preventer |
| 04/24/2013 | CN202900142U Self-sealing casing head |
| 04/24/2013 | CN202900141U Okinawa packing |
| 04/24/2013 | CN202900140U Anti-theft screwed plug |
| 04/24/2013 | CN202900139U Novel air drilling spin control head |
| 04/24/2013 | CN202900138U Blowout-prevention and environmental-protection device for oil well |
| 04/24/2013 | CN202900137U Thermal production well multifunctional leakage-proof packing box |
| 04/24/2013 | CN202900136U Oil producing wellhead device capable of adjusting pulling distance |
| 04/24/2013 | CN202900135U Novel polish rod sealer |
| 04/24/2013 | CN202900134U Wellhead bell mouth device |
| 04/24/2013 | CN202900133U Mobile packing box |
| 04/24/2013 | CN202900132U Wellhead self-sealing device |
| 04/24/2013 | CN202900131U Polish rod sealer |
| 04/24/2013 | CN202900130U Pumping well mouth lubrication double seal device |
| 04/24/2013 | CN202900129U Oil field borehole operation wellhead flange |
| 04/24/2013 | CN202900128U Oil pumping polish rod deviation adjusting packing box |
| 04/24/2013 | CN202900127U Detachable and replaceable type sealing device |
| 04/24/2013 | CN202900126U A seal packing with lubricating oil grooves |
| 04/24/2013 | CN202900125U Slide sleeve type polish rod sealing device |
| 04/24/2013 | CN202900124U Rooting device for blowout rescue of oil well |
| 04/24/2013 | CN202900123U Expanded type channel sealer |
| 04/24/2013 | CN202900112U Wellhead sleeve fixator |
| 04/24/2013 | CN202900064U Flange head |
| 04/24/2013 | CN202900060U Process string for coiled tubing perforation, casing fracturing and bridge plug packing |
| 04/24/2013 | CN103069103A Methods for high solid content fluids in oilfield applications |
| 04/24/2013 | CN103061796A Extraction pipe, extraction system and downwards-drilling extraction method |
| 04/24/2013 | CN103061785A Borehole casing pressure-proof seepage sealing grouting device and process for roadway breaking water burst surrounding rock |
| 04/24/2013 | CN103061733A Sleeve valve type fracturing production-increasing tool |
| 04/24/2013 | CN103061706A Casing float shoe for well cementation |
| 04/24/2013 | CN103061705A High-temperature long-acting polish rod sealing device |
| 04/24/2013 | CN103061704A Metal polished rod sealer with function of automatic wear compensation |
| 04/24/2013 | CN103061703A Efficient energy-saving environment-friendly mechanical sealing device |
| 04/24/2013 | CN103061702A Plugging device for double-barreled directional drilling machine |
| 04/24/2013 | CN103061701A Recoverable production module for use with production tree |
| 04/24/2013 | CN103061670A Structure for preventing collapse of boreholes in pebble bed and construction method thereof |