| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/03/2013 | CN202850909U Tubing anchor special for blowout-prevention oil-drainable mechanical screw pump |
| 04/03/2013 | CN202850893U Double channel drill stem hydraulic power piston pressure adding tool |
| 04/03/2013 | CN202844951U On-line emulsion breaking device for emulsion polymer |
| 04/03/2013 | CN103025995A Blowout preventer monitoring system and method of using same |
| 04/03/2013 | CN103025994A Subsea hydrocarbon production system |
| 04/03/2013 | CN103015951A Layer-selected oil production processing pipe column |
| 04/03/2013 | CN103015947A Solving method for out-of-control high-pressure petroleum blowout |
| 04/03/2013 | CN103015946A Hole-drilling and hole-sealing method for gas extraction |
| 04/03/2013 | CN103015945A Process for improving bearing capacity of formation |
| 04/03/2013 | CN103015944A Method of completing poorly consolidated formations |
| 04/03/2013 | CN103015943A Metal sealing mechanism for packer |
| 04/03/2013 | CN103015942A Under-balanced casing packing completion technique |
| 04/03/2013 | CN103015941A Guide funnel |
| 04/03/2013 | CN103015940A Rotationally actuated riser tubular connection |
| 04/03/2013 | CN103015939A Protective device for thermal recovery well mouth |
| 04/03/2013 | CN103015938A Intelligent hydraulic wellhead sealer |
| 04/03/2013 | CN103015930A Multi-level heavy-load rotating tail pipe suspender |
| 04/03/2013 | CN103013480A Modified petroleum coke granule composite profile control water blocking agent and multi-round bidirectional blocking control technology |
| 04/03/2013 | CN103013479A Dinas coagulated mortar for leaking stoppage and leak stopping method thereof |
| 04/03/2013 | CN102174881B Method for drilling holes and protecting walls by plastic expansion casing pipe and special expansion casing pipe |
| 04/03/2013 | CN102108846B Followed vibration well cementation method |
| 04/03/2013 | CN102041975B Compressed packer sealing cylinder for oil and gas fields |
| 04/03/2013 | CN102011563B Randomly positioned float collar |
| 04/03/2013 | CN102011561B Multi-stage fracturing hole-closing tool |
| 04/03/2013 | CN101915075B Gas hydrate mined by adopting low-temperature solid oxide fuel cell method and device thereof |
| 04/03/2013 | CN101899959B Fishing oil tube overflow controller |
| 04/03/2013 | CN101806223B Method for reinforcing return channel |
| 04/03/2013 | CN101555776B Wellhead blowout preventer of external packer of pipe |
| 04/03/2013 | CN101538995B Method for replacing valve by utilizing borehole pressure |
| 04/02/2013 | US8408514 Lock mechanism for blowout preventer and method |
| 04/02/2013 | US8408337 Downhole blowout preventor |
| 04/02/2013 | US8408319 Control swelling of swellable packer by pre-straining the swellable packer element |
| 04/02/2013 | US8408316 Downhole apparatus with a swellable support structure |
| 04/02/2013 | US8408315 Multilateral expandable seal |
| 04/02/2013 | US8408309 Running tool |
| 04/02/2013 | US8408303 Compositions for improving thermal conductivity of cement systems |
| 04/02/2013 | US8408302 Double swivel apparatus and method |
| 04/02/2013 | US8408290 Interchangeable drillable tool |
| 04/02/2013 | CA2732180C Low profile, high capacity ball injector |
| 04/02/2013 | CA2676526C Downhole preparation and use of thixotropic cement slurries |
| 04/02/2013 | CA2571548C An arrangement for affixing an expandable packer in a hole |
| 04/02/2013 | CA2529728C A sealing device for temporarily closing a well or a pipe |
| 04/02/2013 | CA2473017C Well chemical treatment utilizing plunger lift deliver system |
| 03/28/2013 | WO2013043836A1 Fluid sample cleanup |
| 03/28/2013 | WO2013043663A2 Dual purpose observation and production well |
| 03/28/2013 | WO2013041364A1 Subsea transformer |
| 03/28/2013 | WO2013040709A1 Axially compressed and radially pressed seal |
| 03/28/2013 | WO2013003760A3 Well pump with seal section having a labyrinth flow path in a metal bellows |
| 03/28/2013 | WO2012059202A3 Method and apparatus for sealing a well |
| 03/28/2013 | WO2012037173A3 Blowout preventer ram assembly and method of using same |
| 03/28/2013 | US20130075104 Guide funnel |
| 03/28/2013 | US20130075096 Composition for Well Cementing Comprising A Compounded Elastomer Swelling Additive |
| 03/28/2013 | US20130075095 Method and Apparatus for Treatment of A Perforated Casing |
| 03/28/2013 | US20130075094 Cement Shoe and Method of Cementing Well with Open Hole Below the Shoe |
| 03/28/2013 | US20130075089 Method and system for providing temporary formation sealant |
| 03/28/2013 | DE102010026425B4 Verfahren zum Abdichten von Leckagen an medienführenden Konstruktionen A method for sealing leaks in fluid-carrying structures |
| 03/28/2013 | CA2849144A1 Fluid sample cleanup |
| 03/28/2013 | CA2847875A1 Dual purpose observation and production well |
| 03/27/2013 | CN202832628U Under-pressure gas drainage hole packer |
| 03/27/2013 | CN202832506U Depression angle measuring system of gas pressure |
| 03/27/2013 | CN202832493U Well logging steel wire draining device of water injection well |
| 03/27/2013 | CN202832491U High pressure gas well testing adjustable type inner blowout prevention pipeline |
| 03/27/2013 | CN202832484U Well mouth pressure testing device |
| 03/27/2013 | CN202832463U Step pressure guiding layering fracturing pipe column |
| 03/27/2013 | CN202832458U Deep hole coal seam spalling water injection hole sealing device |
| 03/27/2013 | CN202832433U Slip downhole restriction chock easy to salve |
| 03/27/2013 | CN202832418U Screen pipe completion system |
| 03/27/2013 | CN202832380U Safety valve for float shoe or float collar |
| 03/27/2013 | CN202832377U Rail type switching valve |
| 03/27/2013 | CN202832370U Rapid-drilling bridge plug |
| 03/27/2013 | CN202832369U Double-stage composite well cementation rubber plug |
| 03/27/2013 | CN202832368U Channel fast drillable composite bridge plug |
| 03/27/2013 | CN202832367U Packer |
| 03/27/2013 | CN202832366U Packer capable of expanding when encountering oil and water |
| 03/27/2013 | CN202832365U Small-diameter separated layer water injection packer |
| 03/27/2013 | CN202832364U Blow-by preventing packer |
| 03/27/2013 | CN202832363U Resistance preventing water attack resistant expansion packer |
| 03/27/2013 | CN202832362U Slip-type swab damper |
| 03/27/2013 | CN202832361U Oil-water well packer anticorrosion bracelet shaped anodic protection device |
| 03/27/2013 | CN202832360U Pre-salt 8 - 1 / 8 '' hydraulic packer |
| 03/27/2013 | CN202832359U Lock cylinder plugging device |
| 03/27/2013 | CN202832358U Combined hole sealing device |
| 03/27/2013 | CN202832357U Blowout preventer for rod breakage of screw pump well |
| 03/27/2013 | CN202832356U Anti-jet press cover of stuffing box |
| 03/27/2013 | CN202832355U Shear band blank ram of hydraulic blowout preventer |
| 03/27/2013 | CN202832354U Wellhead blowout prevention cover |
| 03/27/2013 | CN202832353U Straight-buckle fast connection cement head device with large inner diameter |
| 03/27/2013 | CN202832352U Double floating type environment-friendly multifunctional well mouth sealing device |
| 03/27/2013 | CN202832351U Oil well plugging device |
| 03/27/2013 | CN202832350U Sealing device of oil pumping well polish rod |
| 03/27/2013 | CN202832349U Stuffing box |
| 03/27/2013 | CN202832348U Centered type combination polish rod sealing device |
| 03/27/2013 | CN202832347U Gas seal device for radon gas reconnaissance |
| 03/27/2013 | CN202832346U Fixator for fluid control pipeline |
| 03/27/2013 | CN202832345U Pumping well production tree tee joint |
| 03/27/2013 | CN202832344U Skewing-adjusting sealer for well mouth |
| 03/27/2013 | CN202832343U Narrow tube suspension sealing device for gas well injection agents |
| 03/27/2013 | CN202832342U Sedimentation type oil-gas well mouth ball catcher |
| 03/27/2013 | CN202832341U Safety belt tying and hanging device of oil extraction gas wellhead |
| 03/27/2013 | CN202832340U Automatic packing box |