| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 02/19/1992 | CN1058798A Foam for improving sweep efficiency in subterranean oil-bearing formations |
| 02/18/1992 | US5088559 Method and apparatus for running wireline and reeled tubing into a wellbore and stuffing box used in connection therewith |
| 02/18/1992 | US5088558 Undersea package and installation system |
| 02/18/1992 | US5088556 Subsea well guide base running tool |
| 02/11/1992 | WO1992002708A1 Foam for improving sweep efficiency in subterranean oil-bearing formations |
| 02/11/1992 | US5086850 Well bore drilling direction changing method |
| 02/11/1992 | US5086839 Well packer |
| 02/11/1992 | US5086802 Safety check valve |
| 02/11/1992 | CA1295548C Well packer with internally adjustable shear release mechanism |
| 02/06/1992 | WO1992001840A1 Apparatus for injecting soil conditioning fluid |
| 02/06/1992 | DE3625393C1 Hole plug |
| 02/05/1992 | EP0469140A1 Device for protecting wells from corrosion or deposits caused by the nature of the fluid produced or located therein. |
| 02/04/1992 | US5085277 Sub-sea well injection system |
| 02/04/1992 | US5085273 Casing lined oil or gas well |
| 02/01/1992 | CA2046566A1 Stripper rubbers for drilling heads |
| 01/29/1992 | EP0468668A2 Rotary locking system with metal seals |
| 01/28/1992 | CA2040013A1 Blowout preventer |
| 01/28/1992 | CA1294869C Permanent anchor for use with through tubing bridge plug |
| 01/26/1992 | CA2046805A1 Rotary locking system with metal seals |
| 01/22/1992 | EP0467573A2 Subsurface pressure actuated well apparatus |
| 01/21/1992 | US5082577 Method and composition for selectively reducing permeability to water in hydrocarbon reservoirs which are hot and saline |
| 01/21/1992 | US5082062 Horizontal inflatable tool |
| 01/21/1992 | US5082061 Rotary locking system with metal seals |
| 01/21/1992 | US5082060 Subsea well hanger |
| 01/21/1992 | US5082020 Valve body for oilfield applications |
| 01/21/1992 | US5081909 Releasable latch mechanism for attaching an actuator to a valve |
| 01/21/1992 | CA1294540C2 Adjustable cement head manifold |
| 01/21/1992 | CA1294539C2 Adjustable cement head manifold |
| 01/15/1992 | EP0465623A1 Method and apparatus for sealing pipe perforations |
| 01/14/1992 | US5080400 Double lobe tubular connector clamp |
| 01/14/1992 | US5080174 Hydraulic packoff and casing hanger installation tool |
| 01/14/1992 | US5080173 Tieback wellhead system with sidetrack facilities |
| 01/14/1992 | CA1294212C Cementing plug container with remote control system and method of injecting cementing plugs |
| 01/14/1992 | CA1294198C Method and apparatus for repairing casings and the like |
| 01/14/1992 | CA1294112C Insitu hazardous waste treating apparatus and method of using same |
| 01/13/1992 | CA2046714A1 Accelerating set of retarded cement |
| 01/10/1992 | CA2046470A1 Method and apparatus for actuating a downhole tool |
| 01/09/1992 | WO1992000438A1 Subsea pump system |
| 01/08/1992 | EP0464340A2 Apparatus and method for inserting a pump within a conduit |
| 01/08/1992 | CN2092598U Heating-powered bridging plugs of dredge-up type |
| 01/07/1992 | US5078212 Emplacement of filter packs and seals for groundwater monitoring |
| 01/07/1992 | US5078211 Plastic packer |
| 01/02/1992 | EP0463664A1 Treating an underground formation |
| 01/02/1992 | EP0463661A1 Anti-rotation device for cementing plugs with deformable peripheral "fins" or "lips" |
| 12/31/1991 | US5076356 Wellhead equipment |
| 12/26/1991 | WO1991019926A1 Improved quick disconnect coupling |
| 12/26/1991 | WO1991019883A1 Tools for wells |
| 12/26/1991 | WO1991019882A1 Tools for wells |
| 12/25/1991 | CN2091349U Expansion glue tube |
| 12/24/1991 | US5074518 Proportional annular B.O.P. controller |
| 12/24/1991 | CA1293374C Casing slip gague |
| 12/17/1991 | US5072755 Quick disconnect coupling |
| 12/12/1991 | WO1991018686A1 Automated scraping unit |
| 12/11/1991 | EP0460993A2 Multiple cup bridge plug for sealing a well casing |
| 12/11/1991 | EP0460902A2 Drill pipe bridge plug and method of use |
| 12/11/1991 | CN2090415U Safety blowout hookup for wireline test |
| 12/10/1991 | US5070950 Remote controlled actuation device |
| 12/10/1991 | US5070942 Well tubing hanger sealing assembly |
| 12/10/1991 | US5070904 BOP control system and methods for using same |
| 12/05/1991 | CA2119387A1 Method of stopping flow of fluid up through a pipe bore of a pipe string in a wall |
| 12/05/1991 | CA2119386A1 Retrievable bridge plug apparatus for sealing a pipe bore in a pipe string |
| 12/04/1991 | EP0459649A1 Inflatable buoyant near surface riser disconnect system |
| 12/03/1991 | US5069288 Single trip casing hanger/packoff running tool |
| 12/03/1991 | US5069287 Retrievable guide base for subsea well |
| 12/03/1991 | US5069281 Process for enhanced delayed in situ gelation of chromium polyacrylamide gels |
| 12/03/1991 | US5069280 Gravel packer and service tool |
| 12/03/1991 | US5069278 Leakage control device |
| 12/03/1991 | CA1292676C Well casing packers |
| 12/03/1991 | CA1292675C Wellhead isolation tool |
| 12/01/1991 | CA2038191A1 Inflatable buoyant near surface riser disconnect system |
| 11/28/1991 | DE4017013A1 Equipment for cleaning well shafts - involves staged frame moving along shaft walls with horizontal dividers forming sealed chambers |
| 11/27/1991 | CN2089521U Blocking device for oil field |
| 11/26/1991 | US5067734 Metal seal with grooved inlays |
| 11/26/1991 | US5067564 Selective placement of a permeability-reducing material to inhibit fluid communication between a near well bore interval and an underlying aquifer |
| 11/26/1991 | US5067563 Spillproof oil well seal |
| 11/21/1991 | EP0457653A1 Safety sleeve and device for wells, particularly for a subterranean reservoir of fluid under pressure |
| 11/21/1991 | EP0457563A2 Slant rig cementing apparatus |
| 11/20/1991 | CN2089067U Check valve for drill pipe |
| 11/19/1991 | WO1991018180A1 Preform device and processes for coating and/or lining a cylindrical volume |
| 11/19/1991 | US5066048 Weight set connecting mechanism for subsea tubular members |
| 11/16/1991 | CA2042557A1 Lift through plug container for slant rig |
| 11/13/1991 | EP0456397A1 Sequential remote control plug release system for wells |
| 11/13/1991 | CN2088593U Electric submersible pump cable well top sealing device |
| 11/12/1991 | WO1991018182A1 Production systems for underwater wells |
| 11/12/1991 | US5064164 Bop seal with improved metal inserts |
| 11/12/1991 | US5063996 Apparatus for protecting an environmental monitoring well head |
| 11/12/1991 | CA2082652A1 Production systems for underwater wells |
| 11/12/1991 | CA2042256A1 Safety sleeve for a borehole communicating with an underground reserve of fluid under pressure, and associated safety system, and an associated borehole operating method |
| 11/12/1991 | CA1291947C Packing-seal for boreholes |
| 11/12/1991 | CA1291945C Modular near-surface completion system |
| 11/12/1991 | CA1291923C Hydraulic power system |
| 11/06/1991 | EP0455328A1 Subterranean well welding habitat |
| 11/05/1991 | US5062667 Connection seal |
| 11/05/1991 | US5062479 Stripper rubbers for drilling heads |
| 11/05/1991 | US5062450 Valve body for oilfield applications |
| 11/05/1991 | CA1291705C Wellhead hanger and seal |
| 11/03/1991 | WO1991017340A1 Anti-rotation device for use in wellbores |
| 11/03/1991 | CA2081780A1 Anti-rotation device for use in wellbores |
| 10/31/1991 | WO1991016523A1 A system for the control and monitoring of surface or subsea hydrocarbon production |
| 10/30/1991 | EP0454466A2 Drillable well bore packing apparatus |