| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/24/2013 | CN102226375B Method for forming easy-to-collapse drilled hole |
| 04/24/2013 | CN102071900B Custom-pressure expandable naked eye packer |
| 04/24/2013 | CN102011560B Bidirectional pressure-bearing packer |
| 04/24/2013 | CN101881143B Drillable ball injection sliding sleeve suitable for horizontal well |
| 04/24/2013 | CN101787863B Expansion airtight-type water swelling packer |
| 04/24/2013 | CN101787854B Subsection well completion system of bottom water reservoir horizontal well |
| 04/24/2013 | CN101370902B Methods of consolidating unconsolidated particulates in subterranean formations |
| 04/24/2013 | CN101358514B Special bridge plug for cementing open hole well |
| 04/23/2013 | US8424605 Methods and devices for casing and cementing well bores |
| 04/23/2013 | US8424604 Methods and devices for forming a wellbore with casing |
| 04/23/2013 | US8424598 Magnetically controlled delivery of subterranean fluid additives for use in subterranean applications |
| 04/23/2013 | CA2762730C Combination burst-disc subassembly for horizontal and vertical well completions |
| 04/23/2013 | CA2700960C Installable load shoulder for a wellhead |
| 04/18/2013 | WO2013055582A1 Hydraulically set resettable liner hanger |
| 04/18/2013 | WO2013055516A1 Apparatus and method for providing wellbore isolation |
| 04/18/2013 | WO2013055351A1 Alignment of bop stack to facilitate use of a rotating control device |
| 04/18/2013 | WO2013055226A1 Device and method for controlling return flow from a bore hole |
| 04/18/2013 | WO2013055225A1 System for active sealing of a drill string |
| 04/18/2013 | WO2013053057A1 Wellbore actuators, treatment strings and methods |
| 04/18/2013 | WO2013028517A3 Universal pipe thread protector |
| 04/18/2013 | WO2013028329A3 Systems and methods for gravel packing wells |
| 04/18/2013 | WO2013022720A3 Annular gap debris barrier |
| 04/18/2013 | WO2013016097A3 System and method for production of reservoir fluids |
| 04/18/2013 | WO2012156751A3 Connector |
| 04/18/2013 | WO2012112823A4 Stage tool |
| 04/18/2013 | US20130093140 Soft Skin Metal Seal and Technique of Manufacture |
| 04/18/2013 | US20130092401 Method and Flexible Bodies for Subterrain Sealing |
| 04/18/2013 | US20130092400 Apparatus and Method for Providing Wellbore Isolation |
| 04/18/2013 | US20130092377 Use of a chopper mechanism to add fibers to a well |
| 04/18/2013 | US20130092376 Cement oil-based mud spacer formulation |
| 04/18/2013 | US20130092375 Liner wiper plug with bypass option |
| 04/18/2013 | US20130092372 Apparatus and methods of flow testing formation zones |
| 04/18/2013 | CA2851710A1 Wellbore actuators, treatment strings and methods |
| 04/18/2013 | CA2850611A1 Apparatus and method for providing wellbore isolation |
| 04/18/2013 | CA2850007A1 Hydraulically set resettable liner hanger |
| 04/17/2013 | EP2580421A1 Monitoring a subsea installation |
| 04/17/2013 | CN202883008U Water drainage detection hole controller |
| 04/17/2013 | CN202882989U Coal site synthesized polyurethane foaming bag |
| 04/17/2013 | CN202882873U Underground steam injection heat insulation compensation device |
| 04/17/2013 | CN202882843U Self-seal-examining fracturing bridge plug |
| 04/17/2013 | CN202882842U Hole sealing device |
| 04/17/2013 | CN202882841U Pipe external packer capable of being self-expandable when encountering water or oil |
| 04/17/2013 | CN202882840U Water plugging device |
| 04/17/2013 | CN202882839U Throwing-type washable underground pressure bearing blocking device |
| 04/17/2013 | CN202882838U Underground plugging tubular column without leaving stopper on arbitrary layer |
| 04/17/2013 | CN202882837U Backpressure control type anti-jacking and blowout-preventing device |
| 04/17/2013 | CN202882836U Long-term-efficient wear-resisting energy-saving packing |
| 04/17/2013 | CN202882835U Decentralized wellhead transfer device |
| 04/17/2013 | CN202882834U Detecting device for oil drilling blowout preventer |
| 04/17/2013 | CN202882833U Manual operation single disc sucker rod blowout preventer used for complex bolt support structure |
| 04/17/2013 | CN202882832U Lubrication type double-sealing packing box |
| 04/17/2013 | CN202882831U Oil pumping wellhead sealing device |
| 04/17/2013 | CN202882830U Casing temporary plugging device |
| 04/17/2013 | CN202882829U Pumping unit wellhead polished rod sealing ring |
| 04/17/2013 | CN202882828U Double-layer omni-directional adjustable well opening device of heavy oil well |
| 04/17/2013 | CN202882827U Pressurized encapsulating device for well head |
| 04/17/2013 | CN202882826U Sealing and leakage-proof device of oil extraction wellhead polish rod |
| 04/17/2013 | CN202882815U Object falling preventing type wellhead blocking seat |
| 04/17/2013 | CN202882795U Full hydraulic energy-saving belt pressing operation combination device |
| 04/17/2013 | CN202882786U Wireline log blowout prevention pup joint |
| 04/17/2013 | CN202877088U Sundry filter for oil field well cementation ash transport device |
| 04/17/2013 | CN103046896A Fracturing bridge plug |
| 04/17/2013 | CN103046895A Method for filling refracturing plugging agent into single rock core |
| 04/17/2013 | CN103046894A Injection process of refracturing plugging agent |
| 04/17/2013 | CN103046893A Composite rubber sleeve packer |
| 04/17/2013 | CN103046892A Pressurizing packer setting device capable of conducting repeated pressure setting |
| 04/17/2013 | CN103046891A Mine water absorption self-expansion hole sealing technique |
| 04/17/2013 | CN103046890A Sealing blowout preventing device |
| 04/17/2013 | CN103046889A Single-stage sleeve joint device of oil well |
| 04/17/2013 | CN103046888A Self-sealing device of well opening |
| 04/17/2013 | CN103046887A Ball-sealing hollow safety device |
| 04/17/2013 | CN102251760B Loose bed and bedrock layer mixed water-intaking and well-forming process for geothermal well |
| 04/17/2013 | CN102102499B Plugging equipment for ground fracturing plugging water-bearing stratum |
| 04/17/2013 | CN101949273B Method for plugging spring opening in drilling |
| 04/17/2013 | CN101365863B Pressure containment methods of shaft |
| 04/16/2013 | US8418772 Mandrel to be inserted into a liquid circulation pipe and associated positioning method |
| 04/16/2013 | US8418769 Tubular actuator and method |
| 04/16/2013 | US8418763 Self-degrading cement compositions and associated fluid loss applications |
| 04/16/2013 | US8418762 Method of using gelled fluids with defined specific gravity |
| 04/16/2013 | US8418756 Well plug |
| 04/16/2013 | US8418755 Well treatment device, method, and system |
| 04/16/2013 | CA2677478C Apparatus and methods of flow testing formation zones |
| 04/16/2013 | CA2677289C Wellhead system and connector for wellheads |
| 04/16/2013 | CA2626861C Method and apparatus for isolating a wellhead for fracturing |
| 04/14/2013 | CA2791506A1 Scalloped landing ring |
| 04/11/2013 | WO2013052359A1 Method and foam composition for recovering hydrocarbons from a subterranean reservoir |
| 04/11/2013 | WO2013051937A1 Swellable elastomeric polymer materials |
| 04/11/2013 | WO2013050905A1 Method for stopping or at least reducing the uncontrolled release of hydrocarbons, blowout, from a hydrocarbon extraction well |
| 04/11/2013 | WO2013050826A1 Backup wellhead blowout prevention system and method |
| 04/11/2013 | WO2013050315A1 Power cell for deepwater application |
| 04/11/2013 | WO2013050051A1 Subsea retrievable pressure sensor |
| 04/11/2013 | WO2013022637A3 Permeable material compacting method and apparatus |
| 04/11/2013 | WO2012028848A3 Systems and methods for monitoring a parameter of a subterranean formation using swellable materials |
| 04/11/2013 | US20130087977 Damage tolerant casing hanger seal |
| 04/11/2013 | US20130087338 Wellbore operations using controlled variable density fluid |
| 04/11/2013 | US20130087335 Method and Apparatus for Use in Well Abandonment |
| 04/11/2013 | US20130087334 Downhole device actuator and method |
| 04/11/2013 | US20130087333 Apparatus and Method for Cementing a Borehole |
| 04/11/2013 | US20130087323 Multi-function Surge Reduction Apparatus |
| 04/11/2013 | US20130087322 Inflatable packer and control valve |