| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 07/24/1997 | WO1997026442A1 Method for measuring of flow and flowmeter |
| 07/23/1997 | CA2194417A1 Running liners with coiled tubing |
| 07/22/1997 | US5649594 Method and apparatus for servicing a wellhead assembly |
| 07/22/1997 | CA2028102C Undersea package and installation system |
| 07/17/1997 | WO1997025754A1 Wide-banded base station antenna |
| 07/17/1997 | WO1997025517A1 Flow meter |
| 07/15/1997 | US5647572 Low profile and lightweight high pressure blowout preventer |
| 07/15/1997 | US5647444 Rotating blowout preventor |
| 07/15/1997 | US5647437 Thru tubing tool and method |
| 07/09/1997 | CN2257567Y Packer locking and releasing mechanism |
| 07/08/1997 | US5645098 For an oil or gas well |
| 07/03/1997 | WO1997023709A1 System, method and means for replacement of components on bottom based installations |
| 07/03/1997 | WO1997023708A1 Wellhead apparatus |
| 07/03/1997 | WO1997023704A1 Socket pipe coupling means for subsea pipeline systems |
| 07/02/1997 | EP0781893A2 Apparatus and method for early evaluation and servicing of a well |
| 07/01/1997 | US5642872 For an oil or gas well |
| 07/01/1997 | US5642782 Downhole clutch assembly |
| 07/01/1997 | US5642780 For providing a fluid-tight seal |
| 06/26/1997 | WO1997022781A1 Improved measurement port coupler and probe interface |
| 06/26/1997 | DE19617196C1 Sealing-solidifying agent injection system in ground or rock, e.g. two-ingredient fast-reacting agent, esp. polyurethane |
| 06/25/1997 | EP0779946A1 Horizontal subsea tree pressure compensated plug |
| 06/25/1997 | CN2256931Y Bridging plug capable of fishing |
| 06/25/1997 | CN1152663A Activated fly ash and application thereof |
| 06/24/1997 | US5641021 Well casing fill apparatus and method |
| 06/24/1997 | US5641019 Swab-resistant subterranean well packer |
| 06/24/1997 | US5641017 Locking assembly for monitor wells |
| 06/19/1997 | WO1997021904A2 Open hole straddle system and method for setting such a system |
| 06/19/1997 | CA2193290A1 Packer with back-up retrieving method |
| 06/17/1997 | USRE35533 Double lobe tubular connector clamp |
| 06/17/1997 | US5639227 Seal arrangement for the drivehead of a downhole rotary pump |
| 06/17/1997 | US5638904 Within wells |
| 06/17/1997 | US5638903 Adjustable mandrel hanger system |
| 06/17/1997 | US5638855 Low profile and lightweight high pressure blowout preventer |
| 06/15/1997 | CA2191280A1 Adjustable casing hanger with contractible load shoulder and metal sealing ratch latch adjustment sub |
| 06/12/1997 | WO1997021019A1 Plug launching device |
| 06/11/1997 | EP0777813A1 Formation isolation and testing apparatus and method |
| 06/11/1997 | CN2256032Y Automatic screwing down sealing case for polish rod |
| 06/11/1997 | CN2256031Y Low pressure lightweight top apparatus of gas well |
| 06/10/1997 | US5636689 Release/anti-preset mechanism for down-hole tools |
| 06/10/1997 | US5636688 Self aligning stuffing box for pumpjack units |
| 06/10/1997 | CA2139067C Wireline-set tubing-release packer apparatus |
| 06/05/1997 | WO1997020129A1 Method of treating an underground formation |
| 06/04/1997 | EP0777018A1 A method of producing a concrete encasing in the ground, an apparatus for producing a concrete encasing within a hole in the ground, and a concrete encasing provided within a hole in the ground |
| 06/03/1997 | US5634984 Contacting with solution containing two surfactants with different hydrophilic-lipophilic balance values and nonpolar diluent oil, rinsing with water |
| 06/03/1997 | US5634671 Riser connector |
| 06/03/1997 | US5634485 Method and apparatus for retrofitting drilling rigs with a catch pan |
| 06/03/1997 | CA2078675C Improvements in or relating to subsea control systems and apparatus |
| 05/28/1997 | EP0775804A2 Completely removable bidirectional plug |
| 05/28/1997 | EP0775803A2 Linear indexing apparatus and methods of using same |
| 05/23/1997 | CA2190899A1 Apparatus and method for temporary subsurface well sealing and equipment anchoring |
| 05/22/1997 | WO1997018380A1 Riser that is to be detached near the water surface |
| 05/21/1997 | EP0774565A2 Downhole arrangement for acquiring well information |
| 05/21/1997 | EP0774564A2 Well casing fill apparatus and method |
| 05/21/1997 | EP0774107A1 Expansion foam borehole plug and method |
| 05/14/1997 | EP0723641B1 Sealing connection system having rotatably mounted tension means |
| 05/14/1997 | EP0685026B1 Method for drilling and cementing a well |
| 05/14/1997 | CN1149902A Double walled insulated tubing and method for installing same |
| 05/13/1997 | US5628516 For use with an oil well |
| 05/13/1997 | US5628366 Protective arrangements for downhole tools |
| 05/10/1997 | CA2189085A1 Completion apparatus and method |
| 05/09/1997 | WO1997011252A3 Simplified xmas tree using sub-sea test tree |
| 05/07/1997 | EP0771768A1 Well cement composition and use |
| 05/06/1997 | US5626190 Apparatus for protecting electrical connection from moisture in a hazardous area adjacent a wellhead barrier for an underground well |
| 05/01/1997 | WO1997015748A1 Completion assembly for wellbores |
| 05/01/1997 | WO1997015747A1 Assembly and process for drilling and completing multiple wells |
| 05/01/1997 | CA2189215A1 Lightweight well cement compositions and methods |
| 04/29/1997 | US5623994 Well head cutting and capping system |
| 04/29/1997 | US5623993 Method and apparatus for sealing and transfering force in a wellbore |
| 04/23/1997 | EP0629259B1 A method and a device for sealing between a casing and a drill hole in rock drilling operations |
| 04/23/1997 | CN2252882Y Separate fracturing packer |
| 04/23/1997 | CN2252881Y Underwater well self-guide self locking protective cap |
| 04/22/1997 | US5622453 For forming seals in boreholes and cylindrical shafts formed in host rock |
| 04/22/1997 | US5622224 Method and apparatus for cementing well casing using alternate flow paths |
| 04/17/1997 | WO1997005759A3 Improved downhole apparatus |
| 04/17/1997 | DE19637991A1 Injection device for pressurised cement suspension |
| 04/15/1997 | US5620052 Hanger suspension system |
| 04/15/1997 | US5620050 Method for setting hydraulic packers that enable placement of gravel pack in a downhole oil and gas well |
| 04/08/1997 | US5617918 Wellbore lock system and method of use |
| 04/08/1997 | US5617917 Integral blowout preventer and flow tee |
| 04/02/1997 | CN2251039Y Anti-theft sluice valve for well head |
| 04/01/1997 | US5615741 Packer inflation system |
| 04/01/1997 | US5615739 Apparatus and method for completing and recompleting wells for production |
| 04/01/1997 | US5615737 Apparatus for insertion of full bore tools into an earth borehole |
| 04/01/1997 | US5615736 Unitary diversionary-tubing hanger and energizable rod seal |
| 03/30/1997 | CA2186770A1 Apparatus for measuring pressure |
| 03/27/1997 | WO1997011253A1 Single bore riser system |
| 03/27/1997 | WO1997011252A2 Simplified xmas tree using sub-sea test tree |
| 03/26/1997 | CN2250419Y New support type water block device |
| 03/25/1997 | US5613567 Process for completing a well |
| 03/25/1997 | US5613560 Wireline set, tubing retrievable well packer with flow control device at the top |
| 03/25/1997 | US5613559 Decentralizing centralizing locating and orienting subsystems and methods for subterranean multilateral well drilling and completion |
| 03/25/1997 | US5613557 Apparatus and method for sealing perforated well casing |
| 03/25/1997 | US5613555 Inflatable packer with wide slat reinforcement |
| 03/20/1997 | WO1997010480A1 Apparatus and method for installing a pipe in a wellbore |
| 03/20/1997 | WO1997010412A1 Tool for blocking axial flow in gravel-packed well annulus |
| 03/18/1997 | US5611547 Elongated seal assembly for sealing well tubing-to liner annulus |
| 03/18/1997 | US5611400 Drill hole plugging capsule |
| 03/18/1997 | US5611398 Two-piece drilling flange |
| 03/18/1997 | CA2120798C Annular safety system |
| 03/18/1997 | CA2102649C Cement mixing and pumping system and method for oil/gas well |