| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/10/2010 | CN201420522Y Blowout-prevention control device for steam flooding well |
| 03/10/2010 | CN201420516Y Filtering device for hydraulic control system of ground blowout preventer control device |
| 03/10/2010 | CN201420512Y Threaded connecting piece capable of bearing high torque as well as cementing rotary casing and collar employing same |
| 03/10/2010 | CN101668924A Downhole wet connect using piezoelectric contacts |
| 03/10/2010 | CN101666219A Well head mobile anti-theft device |
| 03/10/2010 | CN101666218A Double-sealing packing box for oil field wellhead and wellhead double-sealing method |
| 03/10/2010 | CA2676270A1 Measuring properties of low permeability formations |
| 03/09/2010 | US7674331 use of silicate as a retarder enhancer at appropriate levels to enhance the retarding effect of retarders at high temperatures encountered downhole while accelerating the set of cement at lower temperatures encountered near to the surface |
| 03/09/2010 | US7673693 Hydraulic coiled tubing retrievable bridge plug |
| 03/09/2010 | US7673692 Eutectic material-based seal element for packers |
| 03/09/2010 | US7673691 Apparatus for retaining two strings of tubulars |
| 03/09/2010 | US7673690 Method and apparatus for dynamic application management in sub-sea well installations |
| 03/09/2010 | US7673687 Cement compositions comprising crystalline organic materials and methods of using same |
| 03/09/2010 | US7673686 Method of stabilizing unconsolidated formation for sand control |
| 03/09/2010 | US7673677 Reusable ball seat having ball support member |
| 03/09/2010 | CA2646556C Casing shoes and methods of reverse-circulation cementing of casing |
| 03/04/2010 | WO2010025155A1 Sand control screen assembly and method for use of same |
| 03/04/2010 | WO2010005990A3 Method for maximizing energy recovery from a subterranean formation |
| 03/04/2010 | WO2010005893A3 Locking arrangement to store setting forces |
| 03/04/2010 | US20100052261 Metallic seal for use in highly-corrosive oil and gas environments |
| 03/04/2010 | US20100051295 Swellable packer construction for continuous or segmented tubing |
| 03/04/2010 | US20100051294 Swellable packer with fluid supply |
| 03/04/2010 | US20100051293 Downhole tool with load diverting system and method |
| 03/04/2010 | US20100051280 Intelligent completion design for a reservoir |
| 03/04/2010 | US20100051277 Reverse-Circulation Cementing of Surface Casing |
| 03/04/2010 | US20100051276 Stage cementing tool |
| 03/04/2010 | US20100051275 Methods of activating compositions in subterranean zones |
| 03/04/2010 | US20100051269 Bypass of damaged lines in subterranean wells |
| 03/04/2010 | US20100051261 Telescopic fracturing isolation sleeve |
| 03/04/2010 | US20100051259 Expandable Packer Construction |
| 03/04/2010 | US20100051258 Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same |
| 03/03/2010 | EP2159369A2 Christmas tree with internally positioned flowmeter |
| 03/03/2010 | EP2158380A2 Barrier for instrumentation piping |
| 03/03/2010 | CN201416434Y Repeated climbing-free high-pressure test blowout control device |
| 03/03/2010 | CN201416414Y Integral combination type electric cable-passing through packer for deep well |
| 03/03/2010 | CN201416413Y Sleeve built-in oil well anti-theft device |
| 03/03/2010 | CN201416412Y High-pressure rapid check device |
| 03/03/2010 | CN201416411Y Dual-aligning movable packing kit for polished rod of oil pump |
| 03/03/2010 | CN201416410Y Wellhead oil-stealing preventing device for oil well |
| 03/03/2010 | CN201416409Y Omnidirectional offset packing box |
| 03/03/2010 | CN201416408Y Efficient energy-saving stuffing box |
| 03/03/2010 | CN201416407Y Energy-saving multistage sealed stuffing box |
| 03/03/2010 | CN201416406Y Theft-proof clamp |
| 03/03/2010 | CN201416405Y Rush spray operation machine |
| 03/03/2010 | CN201416404Y Special-shaped packing of universal adjustment wellhead packing box |
| 03/03/2010 | CN201416398Y Anti-theft polished rod side card |
| 03/03/2010 | CN201416395Y Suspension type oil pumping well polished rod lubricator |
| 03/03/2010 | CN101660396A Compensating self-sealing blowout preventer |
| 03/03/2010 | CN101660395A Manual multifunctional thermal production blowout preventer |
| 03/02/2010 | US7669665 Mandrel for introduction into a fluid circulation duct, and related production well |
| 03/02/2010 | US7669654 Cup tool with three-part packoff for a high pressure mandrel |
| 03/02/2010 | US7669653 System and method for maintaining zonal isolation in a wellbore |
| 03/02/2010 | US7669650 Stuffing box for rotating rod |
| 03/02/2010 | US7669648 Polymer shock absorber for use with well head lubricator assembly |
| 03/02/2010 | CA2577774C Casing shoes and methods of reverse-circulation cementing of casing |
| 03/02/2010 | CA2356130C Method and apparatus for drilling and lining a wellbore |
| 02/25/2010 | WO2010022167A1 Tubing hanger seal |
| 02/25/2010 | WO2010020826A1 Expandable downhole tools and methods of using and manufacturing same |
| 02/25/2010 | WO2010020742A1 Wellhead annulus monitoring |
| 02/25/2010 | WO2010020353A1 System and method for connecting and aligning a compliant guide |
| 02/25/2010 | WO2009154913A3 Thermally expansive fluid actuator devices for downhole tools and methods of actuating downhole tools |
| 02/25/2010 | WO2009142847A3 Methods of underground formation consolidation |
| 02/25/2010 | WO2009140591A3 Continuous fibers for use in well completion, intervention, and other subterranean applications |
| 02/25/2010 | WO2009137840A3 Oil well plug and abandonment method |
| 02/25/2010 | US20100044051 Zone isolation assembly array for isolating a plurality of fluid zones in a subsurface well |
| 02/25/2010 | US20100044043 sealants |
| 02/25/2010 | US20100044042 Method of forming subterranean barriers with molten wax |
| 02/25/2010 | US20100044028 High temperature packer and method |
| 02/25/2010 | CA2734266A1 Tubing hanger seal |
| 02/24/2010 | EP2156013A1 Method for completing a borehole |
| 02/24/2010 | EP2156012A2 Subsea intervention system |
| 02/24/2010 | CN201412630Y Special ash transporting three-way valve for oil field well cementing truck |
| 02/24/2010 | CN201412139Y Antitheft box for test wellhead |
| 02/24/2010 | CN201412134Y Small-casing pipe string for multilayer fracturing |
| 02/24/2010 | CN201412133Y Pipe string for multi-stage drag fracturing of horizontal well |
| 02/24/2010 | CN201412129Y Pumping and drainage gas production device of gas production well |
| 02/24/2010 | CN201412113Y Safe environment-friendly slurry pouring device for drilling well |
| 02/24/2010 | CN201412112Y Dual-Faner well cementing tool for well completion by expansible sleeve |
| 02/24/2010 | CN201412111Y Well cementing sliding sleeve device |
| 02/24/2010 | CN201412110Y Compulsive self-unsealing fracturing packer |
| 02/24/2010 | CN201412109Y Telescopic clamp prevention heat-sensitive packer |
| 02/24/2010 | CN201412108Y Well head oil pipe sealing control device for oil field squeeze-injection operation |
| 02/24/2010 | CN201412107Y Hand-hold mobile freeze-proof anti-toxin well head sampler |
| 02/24/2010 | CN201412106Y Well-head protector |
| 02/24/2010 | CN201412105Y Clamp flange throttling device |
| 02/24/2010 | CN201412104Y Anti-splash oil cup |
| 02/24/2010 | CN201412103Y Simple well-head packing pressure cap of oil well |
| 02/24/2010 | CN201412102Y Non-concentric disc-type centering double-cap granular packing box |
| 02/24/2010 | CN201412097Y Hydraulic expansion type hanger for expansion sieve tube |
| 02/24/2010 | CN201412081Y Well-head reserved casing pipe protector |
| 02/24/2010 | CN100591890C Encrypted sealing joint for oil gas well |
| 02/23/2010 | US7665538 Swellable polymeric materials |
| 02/23/2010 | US7665537 System and method to seal using a swellable material |
| 02/23/2010 | US7665534 Zone isolation assembly for isolating and testing fluid samples from a subsurface well |
| 02/23/2010 | US7665532 Pipeline |
| 02/23/2010 | US7665531 Apparatus for facilitating the connection of tubulars using a top drive |
| 02/23/2010 | US7665528 Frangible flapper valve with hydraulic impact sleeve and method of breaking |
| 02/23/2010 | US7665521 Safety cement plug launch system |
| 02/23/2010 | US7665520 Multiple bottom plugs for cementing operations |
| 02/23/2010 | CA2580590C Apparatus and method of fracturing |