| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/05/2003 | CN2538949Y Layered waterflooding packer |
| 03/05/2003 | CN2538948Y Pressure-meter protector |
| 03/05/2003 | CN1400376A Cement band pressure curing channelling-blocking method |
| 03/04/2003 | US6527057 Wiper plug delivery apparatus |
| 03/04/2003 | US6527049 Apparatus and method for isolating a section of tubing |
| 02/27/2003 | WO2003016953A1 Downhole nmr processing |
| 02/27/2003 | WO2003016675A1 Modular catch pan for wellheads |
| 02/27/2003 | WO2003016674A1 Annulus monitoring system |
| 02/27/2003 | WO2003016673A1 Tool for replaceable pressure and temperature sensor |
| 02/27/2003 | WO2003016671A2 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/27/2003 | WO2003006778A8 Drilling system and method for controlling equivalent circulating density during drilling of wellbores |
| 02/27/2003 | US20030037932 Drillable inflatable packer & methods of use |
| 02/27/2003 | US20030037931 Expandable packer, and method for seating an expandable packer |
| 02/27/2003 | US20030037921 Downhole packer system utilizing electroactive polymers |
| 02/27/2003 | CA2454865A1 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/26/2003 | EP1286019A1 Expandable retaining shoe |
| 02/26/2003 | EP0828920B1 A simplified sealing and anchoring device for a well tool |
| 02/26/2003 | CN2537809Y Duck tongue type float hoop and float shoe |
| 02/26/2003 | CN1399705A Sealing off openings through wall of well tubular |
| 02/26/2003 | CN1399704A Setting annular seal |
| 02/25/2003 | US6523613 Hydraulically actuated valve |
| 02/25/2003 | US6523612 Method and apparatus for cleaning wellbore casing |
| 02/25/2003 | CA2190932C Bidirectional disappearing plug |
| 02/20/2003 | WO2003014608A1 Valve system and method |
| 02/20/2003 | WO2003014604A2 Method and apparatus for replacing bop with gate valve |
| 02/20/2003 | WO2003014518A1 Bidirectional sealing blowout preventer |
| 02/20/2003 | WO2003014040A1 Low density, fibre-reinforced cement composition |
| 02/20/2003 | US20030034177 High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
| 02/20/2003 | US20030034163 Packer system |
| 02/20/2003 | US20030034159 Combined sealing and gripping unit for retrievable packers |
| 02/19/2003 | EP1284248A1 Low density, fibre-reinforced cement composition |
| 02/19/2003 | EP1283939A1 Method for plugging a well with a resin |
| 02/19/2003 | CN2536780Y Free-releasing washing packer |
| 02/19/2003 | CN2536779Y Packer |
| 02/19/2003 | CN2536778Y Oil gas well safety devices |
| 02/19/2003 | CN2536770Y Offset thickened tubing hanger |
| 02/18/2003 | US6520263 Retaining apparatus for use in a wellhead assembly and method for using the same |
| 02/18/2003 | US6520262 Riser connector for a wellhead assembly and method for conducting offshore well operations using the same |
| 02/18/2003 | US6520256 Method and apparatus for cementing an air drilled well |
| 02/18/2003 | US6520255 Method and apparatus for stimulation of multiple formation intervals |
| 02/18/2003 | US6520253 Rotating drilling head system with static seals |
| 02/13/2003 | WO2003012252A1 Labyrinth lock seal for hydrostatically set packer |
| 02/13/2003 | WO2003012251A1 Adjustable tubing hanger assembly |
| 02/13/2003 | US20030030017 Valve system and method |
| 02/13/2003 | US20030029619 Method and apparatus for replacing BOP with gate valve |
| 02/13/2003 | US20030029618 Method and system for moving equipment into and through an underground well |
| 02/13/2003 | US20030029611 System and method for actuating a subterranean valve to terminate a reverse cementing operation |
| 02/13/2003 | CA2454948A1 Labyrinth lock seal for hydrostatically set packer |
| 02/12/2003 | EP1159509A4 Single valve for a casing filling and circulating apparatus |
| 02/12/2003 | EP1090238B1 Seal |
| 02/12/2003 | CN2535549Y Bidirectional anchoring packer |
| 02/12/2003 | CN2535548Y Double-valve pressure difference water-filling expansion-packing packer |
| 02/11/2003 | US6517125 Cementing head |
| 02/11/2003 | US6516887 Method and apparatus for tensioning tubular members |
| 02/11/2003 | US6516885 Reducing water flow |
| 02/11/2003 | US6516876 Running tool for soft landing a tubing hanger in a wellhead housing |
| 02/11/2003 | US6516875 Tubing hanger lockdown mechanism |
| 02/11/2003 | US6516861 Method and apparatus for injecting a fluid into a well |
| 02/11/2003 | CA2239748C Cementing plug |
| 02/11/2003 | CA2173416C Inserting device for coiled tubing |
| 02/06/2003 | WO2002077496A3 Metal-to-metal seal with soft metal insert |
| 02/06/2003 | US20030024712 Bridge plug |
| 02/06/2003 | US20030024709 Well tubing rotator and hanger system |
| 02/06/2003 | US20030024708 Structral support |
| 02/06/2003 | US20030024705 Bidirectional sealing blowout preventer |
| 02/06/2003 | US20030024704 Use of downhole high pressure gas in a gas-lift well |
| 02/06/2003 | US20030024701 Cementing manifold assembly |
| 02/05/2003 | EP1280976A2 Instrumented cementing plug and system |
| 02/05/2003 | EP1153320A4 Focused formation fluid sampling probe |
| 02/05/2003 | CN2534364Y Pressure difference packer |
| 02/05/2003 | CN2534363Y Wellhead blowout preventer |
| 02/05/2003 | CN2534362Y Arc shape O type pumping unit packing |
| 02/05/2003 | CN2534361Y Oil field wallhead adulterating water process assembling apparatus |
| 02/05/2003 | CN1395024A Viscous oil emulsion phase-inversion profile control water blockoff |
| 02/05/2003 | CN1395023A Quick workover process |
| 02/04/2003 | US6513601 Method for setting a packer in a well bore, and a packer |
| 02/04/2003 | US6513600 Apparatus and method for packing or anchoring an inner tubular within a casing |
| 02/04/2003 | US6513590 System for running tubular members |
| 02/04/2003 | CA2071721C Downhole tool apparatus with non-metallic components and methods of drilling thereof |
| 02/02/2003 | CA2395723A1 Improved bridge plug |
| 01/31/2003 | WO2002021072A2 Displacement measurement with a spring and force measurement for actuators, blow-out preventers, valves |
| 01/31/2003 | CA2418099A1 Displacement measurement with a spring and force measurement for actuators, blow-out preventers, valves |
| 01/30/2003 | WO2003008762A1 Drilled hole closure |
| 01/30/2003 | WO2003008760A1 Method of sealing an annulus |
| 01/30/2003 | WO2003008756A1 Wellbore system with annular seal member |
| 01/30/2003 | WO2002055831A3 Improved method for stimulation of liquid flow in a well |
| 01/30/2003 | US20030019867 Method and apparatus for sealing multiple casings for oil and gas wells |
| 01/30/2003 | US20030019638 Procedures and equipment for profiling and jointing of pipes |
| 01/30/2003 | US20030019635 Cap for a well casing and method to retrofit a well casing with a cap |
| 01/30/2003 | US20030019632 Production tree with multiple safety barriers |
| 01/30/2003 | US20030019631 Subsea wellhead equipment |
| 01/30/2003 | US20030019628 Bottom hole assembly |
| 01/30/2003 | US20030019623 Labyrinth lock seal for hydrostatically set packer |
| 01/30/2003 | US20030019622 Downhole actuation system utilizing electroactive fluids |
| 01/30/2003 | CA2453659A1 Method of sealing an annulus |
| 01/29/2003 | EP1278936A1 Tubing hanger with annulus bore |
| 01/29/2003 | EP1278935A1 Tubing head seal assembly |
| 01/29/2003 | EP1278934A1 Tubing hanger system with gate valve |
| 01/29/2003 | EP1278933A1 Internal gate valve for flow completion systems |
| 01/29/2003 | CN2533257Y Multipurpose packer for oil and gas field |