| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 05/30/2012 | CN202249930U Self-locking rubber plug |
| 05/30/2012 | CN202249929U Combined self-locking variable-diameter rubber plug for sleeve |
| 05/30/2012 | CN202249928U Cementing cement head |
| 05/30/2012 | CN202249927U Well bottom sealing device |
| 05/30/2012 | CN202249926U Hydraulic stirring device |
| 05/30/2012 | CN202249925U Water injection packer |
| 05/30/2012 | CN202249924U Tail pipe suspending packing assembly special for shallow horizontal well |
| 05/30/2012 | CN202249923U Packer |
| 05/30/2012 | CN202249922U Device for sealing high-pressure slip casting open hole deep hole with preposed expand tube |
| 05/30/2012 | CN202249921U Expanding type packer capable of unpacking stepwise |
| 05/30/2012 | CN202249920U Pumping packer |
| 05/30/2012 | CN202249919U Self-sealing cup packer |
| 05/30/2012 | CN202249918U Well-flushing self-test sealing packer |
| 05/30/2012 | CN202249917U Back flushing packer |
| 05/30/2012 | CN202249916U Underground spray-prevention tool for pumping unit well pump |
| 05/30/2012 | CN202249915U Oil-leaking oil well leakage stopping device |
| 05/30/2012 | CN202249914U Bidirectional pressure transmission test sealer |
| 05/30/2012 | CN202249913U Universal blowout prevention box for oil well |
| 05/30/2012 | CN202249912U Blowout-preventing box device of oil well |
| 05/30/2012 | CN202249911U Device for prevention of wellhead blowout under polished-rod break-off situation |
| 05/30/2012 | CN202249910U Pressure relief valve of hydraulic motor |
| 05/30/2012 | CN202249909U Liquid-spraying prevention sleeve recoverer |
| 05/30/2012 | CN202249908U Demolition-free simple sleeve head of blowout preventer |
| 05/30/2012 | CN202249907U Pipe fitting port sealing lock |
| 05/30/2012 | CN202249906U Automatic tightener for oilfield packing cap |
| 05/30/2012 | CN202249905U Anti-theft alarm for oil pumping polished rod |
| 05/30/2012 | CN202249904U Oilfield wellhead with protection function |
| 05/30/2012 | CN202249903U Leakproof environment-friendly protective device for oil production well |
| 05/30/2012 | CN202249902U Portable hanging self seal |
| 05/30/2012 | CN202249901U Well mouth sealing device |
| 05/30/2012 | CN202249900U Blow-out prevention double-stage packing box |
| 05/30/2012 | CN202249899U Pressure isolating device for wellhead production tree |
| 05/30/2012 | CN202249898U Multifunctional sealing device for polished rod |
| 05/30/2012 | CN202249897U Installation structure of wellhead nondestructive testing device of drilling tools |
| 05/30/2012 | CN202249896U Pressure-relieving safety protector |
| 05/30/2012 | CN202249895U Deflection adjustable multifunctional sealing device |
| 05/30/2012 | CN202249894U Large-diameter wellhead assembly easy to assemble and disassemble |
| 05/30/2012 | CN202249893U Hanger for small separate-exploitation separate-injection oil pipe |
| 05/30/2012 | CN202249892U Tie-back wellhead connection device for tail pipe |
| 05/30/2012 | CN202249891U Multifunctional polished rod sealing device |
| 05/30/2012 | CN202249890U Anti-spraying box fast connection device |
| 05/30/2012 | CN202249889U Auxiliary sealing device for casing hanger |
| 05/30/2012 | CN202249888U Device for preventing oil pipe from ejection during blowout |
| 05/30/2012 | CN202249887U Cable-penetrating thermal recovery wellhead device for electric submersible pump |
| 05/30/2012 | CN202249886U Self-lubricating wellhead sealer |
| 05/30/2012 | CN202249885U Washable well insertion type sealing device |
| 05/30/2012 | CN202249850U Sand washing and bailing device of absorption well |
| 05/30/2012 | CN202249829U Blowout rescuer rushing device |
| 05/30/2012 | CN202249804U Tubing head without well control for dragging operation |
| 05/30/2012 | CN102482928A 可扩张保径环 Expandable gage ring |
| 05/30/2012 | CN102482923A Metal-to-metal annulus seal arrangement |
| 05/30/2012 | CN102482564A 用于维修地下井的组合物和方法 The compositions and methods for maintenance of underground wells |
| 05/30/2012 | CN102477860A 一种高压油汽井地面测试改进工艺 A high-pressure oil and gas wells ground test process improvements |
| 05/30/2012 | CN102477859A 远程控制台数据记录模块 Remote console data logging module |
| 05/30/2012 | CN102477851A 一种深井注水泥塞工艺技术 One kind of deep well injection cement plug technology |
| 05/30/2012 | CN102477850A 煤层瓦斯抽采井固井方法和固井系统 Coal gas drainage wells cementing methods and cementing systems |
| 05/30/2012 | CN102477849A 一种选择性堵水工艺方法 A selective process for water shutoff |
| 05/30/2012 | CN102477288A 一种油气储层保护的钻井完井液 One kind of oil and gas drilling and completion fluid reservoir protection |
| 05/30/2012 | CN101614117B Expansion tube type liner hanger |
| 05/30/2012 | CN101550815B A bridge plug that blocks off oil tube |
| 05/29/2012 | US8186685 Seal |
| 05/29/2012 | US8186446 Method and apparatus for a packer assembly |
| 05/29/2012 | US8186441 Modular backup fluid supply system |
| 05/29/2012 | CA2716430C Pump drive head with stuffing box |
| 05/29/2012 | CA2681868C Riser rotating control device |
| 05/29/2012 | CA2675191C Plug protection system and method |
| 05/29/2012 | CA2568339C Blowout preventer positioning system |
| 05/24/2012 | WO2012068006A2 System for controlling cement flow in a well |
| 05/24/2012 | WO2012067842A2 Sealing devices having a non-elastomeric fibrous sealing material and methods of using same |
| 05/24/2012 | WO2012067786A2 Plug and method of unplugging a seat |
| 05/24/2012 | WO2012067704A1 System and method for containing borehole fluid |
| 05/24/2012 | WO2012067672A1 Rcd sealing elements with multiple elastomer materials |
| 05/24/2012 | WO2012067579A1 Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling |
| 05/24/2012 | WO2012066290A2 Downhole method and apparatus |
| 05/24/2012 | WO2012065218A1 A segmented riser bundle |
| 05/24/2012 | US20120126482 Tube sealing device and a sealing element for such a device |
| 05/24/2012 | US20120125642 Convertible multi-function downhole isolation tool and related methods |
| 05/24/2012 | US20120125641 Modular hydraulic packer-and-port system |
| 05/24/2012 | US20120125640 Swellable packer having thermal compensation |
| 05/24/2012 | US20120125639 Method of using gelled fluids with defined specific gravity |
| 05/24/2012 | US20120125631 Systems and Methods of Diverting Fluids In A Wellbore Using Destructible Plugs |
| 05/24/2012 | US20120125630 Retrievable swellable packer |
| 05/24/2012 | US20120125622 Wellsite equipment replacement system and method for using same |
| 05/24/2012 | US20120125600 Device for blocking-off part of the interior of a pipe |
| 05/24/2012 | US20120125598 Remote operation of a rotating control device bearing clamp |
| 05/24/2012 | CA2818105A1 Rcd sealing elements with multiple elastomer materials |
| 05/24/2012 | CA2817733A1 Sealing devices having a non-elastomeric fibrous sealing material and methods of using same |
| 05/24/2012 | CA2817343A1 Downhole method and apparatus |
| 05/24/2012 | CA2817087A1 Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling |
| 05/24/2012 | CA2816744A1 Plug and method of unplugging a seat |
| 05/23/2012 | EP2454446A1 Well tool and method for in situ introduction of a treatment fluid into an annulus in a well |
| 05/23/2012 | EP1603847B1 Flexible cementing compositions and methods for high-temperature wells |
| 05/23/2012 | CN202228091U Grouting cylinder |
| 05/23/2012 | CN202228041U Ball throwing-type hydraulic stage collar |
| 05/23/2012 | CN202228040U Pipe string for separate-zone production of thin oil |
| 05/23/2012 | CN202228039U Ground hydraulic-control cable packer |
| 05/23/2012 | CN202228038U Pipe string for plugging shallow-layer sleeve leakage water injection well |
| 05/23/2012 | CN202228037U Watering-type wellhead controller |
| 05/23/2012 | CN202228036U Efficient and energy-saving wellhead self-sealing blowout preventer |
| 05/23/2012 | CN202228035U Packing box for oil well |