| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/25/2004 | US20040059506 System and method for sensing leakage across a packer |
| 03/25/2004 | US20040056432 Metal seal with corrosion resistant alloy overlay |
| 03/25/2004 | US20040055760 Method and apparatus for forming an annular barrier in a wellbore |
| 03/25/2004 | US20040055758 Annular isolators for expandable tubulars in wellbores |
| 03/25/2004 | US20040055742 Cut tool for high pressure mandrel |
| 03/25/2004 | US20040055741 Plug-dropping container for releasing a plug into a wellbore |
| 03/25/2004 | US20040055421 Granular particle gripping surface |
| 03/24/2004 | EP1399643A1 Rotational mounts for blowout preventer bonnets |
| 03/24/2004 | CN1484730A 流体混合系统 Fluid mixing system |
| 03/23/2004 | US6708770 Drillable bridge plug |
| 03/23/2004 | US6708768 Drillable bridge plug |
| 03/23/2004 | US6708766 Wellhead assembly for communicating with the casing hanger annulus |
| 03/20/2004 | CA2404315A1 Well servicing apparatus and method |
| 03/18/2004 | WO2004022908A1 A completion having an annulus valve |
| 03/18/2004 | WO2004022903A2 Top drive swivel apparatus and method |
| 03/18/2004 | WO2004022902A2 Tie-back connection for subsea well |
| 03/18/2004 | WO2003067017A3 Plug installation system for deep water subsea wells |
| 03/18/2004 | US20040050217 Erosion resistant, self and/or artificial external cleaning solid exclusion system |
| 03/17/2004 | EP0698175B1 Well plugging apparatus and method |
| 03/17/2004 | CN2606791Y 压缩式注水封隔器 Compression injection packer |
| 03/17/2004 | CN2606790Y Small diameter washable well packer |
| 03/17/2004 | CN2606789Y Strong magnet environment protection type wellhead protector |
| 03/17/2004 | CN2606784Y Striking sheet type anti-jet short joint |
| 03/16/2004 | US6705615 Sealing system and method |
| 03/16/2004 | US6705401 Ported subsea wellhead |
| 03/16/2004 | US6705395 Wellbore casing |
| 03/16/2004 | CA2342619C Hydraulic well packer |
| 03/16/2004 | CA2271459C Method for accelerating production |
| 03/11/2004 | WO2004020782A1 Connection device |
| 03/11/2004 | WO2004020781A1 Connecting mechanism |
| 03/11/2004 | WO2004020780A1 Temporary abandonment cap |
| 03/11/2004 | WO2004020776A2 Well treatment apparatus and method |
| 03/11/2004 | US20040048751 Process for controlling gas migration during well cementing |
| 03/11/2004 | US20040045723 Drillable bridge plug |
| 03/11/2004 | US20040045722 Safety valve for oil wells |
| 03/11/2004 | US20040045718 Liner hanger with sliding sleeve valve |
| 03/11/2004 | US20040045711 Compressed bentonite-containing nodules are disclosed as are methods for their production and methods for using them to plug wells. |
| 03/10/2004 | EP1395732A1 In-situ casting of well equipment |
| 03/10/2004 | EP0938622B1 Method for accelerating production - c-i-p ii |
| 03/10/2004 | CN2606176Y Leakproof polish rod sealer of oil well |
| 03/10/2004 | CN1480627A Technique for dissecting depth of sludge containing oil in injection well |
| 03/09/2004 | US6702030 Procedures and equipment for profiling and jointing of pipes |
| 03/09/2004 | US6702029 Tubing anchor |
| 03/09/2004 | US6702013 Multiport gate valve assembly for flow completion system |
| 03/09/2004 | US6702012 High pressure rotating drilling head assembly with hydraulically removable packer |
| 03/04/2004 | WO2004018832A1 A method and device by a displacement tool |
| 03/04/2004 | WO2004018825A2 Riser connector |
| 03/04/2004 | WO2003093638A3 Tubing anchor |
| 03/04/2004 | WO2003093637A3 Tubing anchor |
| 03/04/2004 | US20040043501 Monitoring reservoir conditions, estimating and quantifying concentrations of oil and gas in earth formations and determining operating and physical conditions of down hole tools |
| 03/04/2004 | US20040040719 Plug concealment and diversion tool |
| 03/04/2004 | US20040040710 Prevent leakage of hydrocarbon fluid; plugging well; heating, expansion of low melting bismuth alloy |
| 03/04/2004 | US20040040709 Apparatus and method for disconnecting a tail pipe and maintaining fluid inside a workstring |
| 03/04/2004 | US20040040707 Well treatment apparatus and method |
| 03/04/2004 | US20040040702 Temporary abandonment cap |
| 03/04/2004 | US20040040701 Apparatus for retaining two strings of tubulars |
| 03/03/2004 | EP1394354A2 Hydraulic well control system |
| 03/03/2004 | EP1394353A2 Controlling gas migration during well cementing |
| 03/03/2004 | EP1392953A1 Line hanger, running tool and method |
| 03/03/2004 | EP0900320B1 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 03/03/2004 | CN2605378Y Hydraulic rigid centralising device for well drilling and well cementation |
| 03/02/2004 | US6698976 Grouting pipe equipment and method of grouting using the same for an underground water well |
| 03/02/2004 | US6698520 Light-intervention subsea tree system |
| 03/02/2004 | CA2220681C Internally latched subsea wellhead tieback connector |
| 03/02/2004 | CA2018754C Method of drilling and lining a borehole |
| 02/29/2004 | CA2436377A1 Process for controlling gas migration during well cementing |
| 02/26/2004 | WO2004016903A1 High expansion sealing device with leak path closures |
| 02/26/2004 | WO2004016901A1 Well abandonment apparatus |
| 02/26/2004 | WO2004016899A2 Horizontal spool tree wellhead system and method |
| 02/26/2004 | WO2003006778A3 Drilling system and method for controlling equivalent circulating density during drilling of wellbores |
| 02/26/2004 | US20040036225 Anti-extrusion assembly for a packing element system |
| 02/26/2004 | US20040035588 Expandable packer with anchoring feature |
| 02/25/2004 | EP1226331B1 Drillable inflatable packer & methods of use |
| 02/25/2004 | EP1149139B1 Agent and method for sealing or consolidating rock, loose rock or soils, especially bore holes |
| 02/25/2004 | CN2604518Y Washable well hydraulic compressing packer |
| 02/25/2004 | CN2604517Y Oil layer protector |
| 02/25/2004 | CN2604516Y Water packing-off up-down conductive antiresiduum device |
| 02/25/2004 | CN2604515Y Borehole blow-out preventer valve for rod-pumped well |
| 02/25/2004 | CN2604514Y Self-sealing well head packer |
| 02/25/2004 | CN2604513Y Antitheft well head cap and its special spanner |
| 02/24/2004 | US6697738 Method for selection of cementing composition |
| 02/24/2004 | US6695067 Wellbore isolation technique |
| 02/24/2004 | US6695064 Slip spool and method of using same |
| 02/24/2004 | US6695063 Expansion assembly for a tubular expander tool, and method of tubular expansion |
| 02/24/2004 | US6695059 Mechanical anti-rotational feature for subsea wellhead housing |
| 02/24/2004 | US6695057 Fracturing port collar for wellbore pack-off system, and method for using same |
| 02/24/2004 | US6695051 Expandable retaining shoe |
| 02/24/2004 | US6695050 Expandable retaining shoe |
| 02/24/2004 | CA2268104C Method of obtaining improved geophysical information about earth formations |
| 02/24/2004 | CA2086505C Control of fluid flow in oil wells |
| 02/21/2004 | CA2437635A1 Method and apparatus for wellbore fluid treatment |
| 02/19/2004 | WO2004015240A1 Seal ring for well completion tools |
| 02/19/2004 | US20040033906 Liner hanger with slip joint sealing members and method of use |
| 02/19/2004 | US20040032088 Metal-to-metal sealing system |
| 02/19/2004 | US20040031940 Blowout valve assembly |
| 02/19/2004 | US20040031610 Expanding well tools |
| 02/19/2004 | US20040031605 High expansion sealing device with leak path closures |
| 02/19/2004 | US20040031585 Earth loop energy systems |
| 02/19/2004 | CA2840348A1 Tubular expansion method |
| 02/19/2004 | CA2645400A1 Tubular expansion method |