| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 04/03/1996 | CN2223776Y Shoe type packer |
| 04/02/1996 | US5503230 On a subsea wellhead housing |
| 04/02/1996 | US5503227 Methods of terminating undesirable gas migration in wells |
| 03/27/1996 | EP0702747A1 Inflatable reinforced downhole packer |
| 03/27/1996 | EP0559735B1 Plugs for well logging operations |
| 03/26/1996 | US5501281 Torque-resistant, seal setting force-limited, hydraulically settable well packer structure and associated methods |
| 03/26/1996 | US5501280 For running a casing string into a well bore |
| 03/26/1996 | US5501277 Combating lost circulation during the drilling of wells |
| 03/21/1996 | WO1996008634A1 Pressurized sheave mechanism for high pressure wireline service |
| 03/21/1996 | DE19533917A1 Hydraulische Unterwasserkupplung mit axialer Vorlast Hydraulic coupling with axial preload |
| 03/20/1996 | EP0701651A1 Multiple-seal underwater pipe-riser connector |
| 03/20/1996 | CA2154974A1 Apparatus and method for installing coiled tubing in a well |
| 03/19/1996 | US5499687 Downhole valve for oil/gas well |
| 03/19/1996 | US5499682 Method for setting a slotted face wellbore deviation assembly using a rectilinear setting tool |
| 03/19/1996 | US5499681 Centralizing liner hanger method and system for subterranean multilateral well drilling |
| 03/19/1996 | US5499680 Diverter, diverter retrieving and running tool and method for running and retrieving a diverter |
| 03/19/1996 | CA2083156C Preform device and processes for coating and/or lining a cylindrical volume |
| 03/14/1996 | WO1996007812A1 Horizontal subsea tree pressure compensated plug |
| 03/13/1996 | EP0701045A2 Multilateral well drilling and completion method and apparatus |
| 03/13/1996 | EP0701043A2 Torque-resistant well packer |
| 03/13/1996 | EP0701042A2 Decentring method and apparatus, especially for multilateral wells |
| 03/13/1996 | EP0701041A2 Well flow conductor and manufacture thereof |
| 03/13/1996 | EP0701040A2 Downhole diverter and retrieving tool therefor |
| 03/13/1996 | CN1118616A Method for drilling and cementing a well |
| 03/12/1996 | US5497840 Process for completing a well |
| 03/12/1996 | US5497829 Expansion foam borehole plug and method |
| 03/12/1996 | CA2006760C Plug for pier hole |
| 03/06/1996 | EP0699820A2 Inflation packer apparatus |
| 03/06/1996 | EP0699819A2 Method and apparatus for well testing or servicing |
| 03/05/1996 | US5495892 Inflatable packer device and method |
| 02/29/1996 | WO1996006260A1 Template construction for drilling subsea wells for oil and gas |
| 02/28/1996 | EP0698175A1 Well plugging apparatus and method |
| 02/27/1996 | US5494110 Two-part connector for fluid carrying conduits |
| 02/27/1996 | US5494107 Reverse cementing system and method |
| 02/27/1996 | CA2156981A1 Composite well flow conductor for subterranean multilateral well drilling and completion and method of manufacture therefor |
| 02/21/1996 | EP0697501A2 Integrated well drilling and formation evaluation system |
| 02/21/1996 | EP0697500A2 Method and apparatus for the evaluation of formation pressure |
| 02/21/1996 | EP0697496A2 High pressure well cementing plug assembly |
| 02/21/1996 | CN2220528Y Oil pumping rod sealing apparatus |
| 02/20/1996 | US5492373 Wellhead flange for interconnecting a threaded wellhead and a flanged blowout preventer |
| 02/20/1996 | US5492173 Plug or lock for use in oil field tubular members and an operating system therefor |
| 02/20/1996 | US5492017 Inductive pressure transducer |
| 02/13/1996 | US5490877 Low-viscosity cement composition |
| 02/13/1996 | US5490565 Casing seal and spool for use in fracturing wells |
| 02/07/1996 | CN1116269A High temp.-resistant sand-solidifying agent and preparing method |
| 02/06/1996 | US5489574 Cementitious composition for the cementation of oil wells |
| 02/06/1996 | US5488994 Inflation packer method and apparatus |
| 02/06/1996 | US5488992 Spoolable flexible sliding sleeve |
| 02/06/1996 | US5488876 Soil sampling system with sample container ridgidly coupled to drive casing |
| 02/01/1996 | DE4439546C1 Method for permanent closure of earth drillings |
| 01/30/1996 | US5487427 For activating a slip for downhole use |
| 01/25/1996 | WO1996001937A1 Preform, device and method for casing a well |
| 01/23/1996 | US5485882 Low-density ball sealer for use as a diverting agent in hostile environment wells |
| 01/23/1996 | CA2128668A1 Method and apparatus for no touch tagging of cement plugs used in well abandonment |
| 01/18/1996 | DE4441719C1 Method for cladding shaft, esp. well shaft |
| 01/17/1996 | EP0692609A2 Release mechanism without presetting means for down-hole tools |
| 01/17/1996 | CN1115185A Assembly and process for drilling and completing multiple wells |
| 01/16/1996 | US5484024 Oilwell spill containment |
| 01/16/1996 | US5484020 Remedial wellbore sealing with unsaturated monomer system |
| 01/16/1996 | US5484019 Method for cementing in a formation subject to water influx |
| 01/16/1996 | US5484018 Method for accessing bypassed production zones |
| 01/16/1996 | US5483986 Cementing in well bores, forming separator plug in situ by vulcanization of rubber |
| 01/10/1996 | EP0690942A1 Process for sealing off ground sites and device for carrying out this process |
| 01/10/1996 | CN1114672A Urea-formaldehyde resin solution sand-proof process formulation |
| 01/03/1996 | EP0689637A1 Method and device for cementing a well |
| 01/02/1996 | US5480933 In oil wells, enhanced oil recovery |
| 01/02/1996 | US5479991 Reeled tubing deployed packer with control line bypass |
| 01/02/1996 | US5479986 Temporary plug system |
| 01/02/1996 | US5479960 Fluid couplings and seals |
| 01/02/1996 | CA2058869C Primary cementing |
| 12/28/1995 | WO1995035428A1 Soil sampler with fluid-coupled latching system |
| 12/27/1995 | EP0688393A1 Method for isolating a wellbore formation zone |
| 12/27/1995 | CN2216140Y Quick casing head |
| 12/27/1995 | CN2216139Y Portable multifunction wellhead well plugging device |
| 12/26/1995 | US5478970 Apparatus for terminating and interconnecting rigid electrical cable and method |
| 12/26/1995 | US5477925 Method for multi-lateral completion and cementing the juncture with lateral wellbores |
| 12/26/1995 | US5477920 Membrane liner for casing head of oil wells and the like and method of use therefore |
| 12/20/1995 | EP0687801A2 Metal sealing wireline plug |
| 12/19/1995 | US5476145 Selective placement of a permeability-reducing material in a subterranean interval to inhibit vertical flow through the interval |
| 12/19/1995 | US5476144 Conversion of oil-base mud to oil mud-cement |
| 12/13/1995 | EP0686228A1 A downhole tool |
| 12/13/1995 | EP0535030B1 Improved quick disconnect coupling |
| 12/12/1995 | US5474133 Method for retreiving a slotted face wellbore deviation assembly using a retrieval tool |
| 12/12/1995 | US5474127 Annular safety system for oil well |
| 12/12/1995 | US5474125 Retrieval tool for use with a slotted face wellbore deviation assembly |
| 12/07/1995 | WO1995033121A1 Injector for injecting a tracer into an oil or gas reservoir |
| 12/07/1995 | WO1995033120A1 A well entry tool |
| 12/07/1995 | CA2191739A1 Injector for injecting a tracer into an oil or gas reservoir |
| 12/06/1995 | EP0685026A1 Method for drilling and cementing a well. |
| 12/06/1995 | CN2214519Y Single wing portal apparatus |
| 12/06/1995 | CN2214518Y U-shape tube effect controller in the process of strengthening well |
| 12/05/1995 | US5472055 Liner hanger setting tool |
| 12/05/1995 | US5472052 Method of abandoning a well and apparatus therefor |
| 12/05/1995 | US5472049 For remediating an underground formation containing contaminated groundwater |
| 12/05/1995 | US5472048 Parallel seal assembly |
| 11/30/1995 | WO1995032355A1 Double walled insulated tubing and method of installing same |
| 11/30/1995 | WO1995032354A1 Method for selectively treating wells with a low viscosity epoxy resin-forming composition |
| 11/29/1995 | CN2213839Y Protect board type cup leather packer |
| 11/29/1995 | CN2213838Y Two-way spray mixed chemical shut-off device |
| 11/28/1995 | US5469919 Programmed shape inflatable packer device and method |