| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 06/29/1988 | EP0272709A1 Process for plugging subterranean formations, notably in the domain of oilfield services and corresponding applications |
| 06/29/1988 | CN87213020U Portal acid-proof apparatus |
| 06/28/1988 | US4753444 Composite of fluorocarbon resins, poly aryl ketones, carbon fibers; heat, pressure and chemical resistant |
| 06/22/1988 | EP0272080A2 Cementing and washout method and device for a well |
| 06/22/1988 | CN87210519U Mechanical packer for preventing heat dynamic cycle |
| 06/21/1988 | US4751969 Apparatus and method for removing fluids from a well |
| 06/21/1988 | US4751968 Wellhead stabilizing member with deflecting ribs |
| 06/21/1988 | US4751967 Stage cementing apparatus |
| 06/21/1988 | US4751965 Wellhead seal assembly |
| 06/21/1988 | US4751939 Immersed hydraulic unit for controlling an underwater oil working station |
| 06/21/1988 | CA1238271A1 Electric power supplying well head assembly |
| 06/21/1988 | CA1238270A1 Tubing actuated retrievable packer |
| 06/21/1988 | CA1238198A1 Offshore structure for deepsea production |
| 06/15/1988 | EP0271297A2 Packer bypass |
| 06/14/1988 | US4750865 Subsurface stuffing box assembly |
| 06/14/1988 | US4750564 Tubing resettable well packer |
| 06/14/1988 | CA1237981A1 Underwater production station unit and wellhead shield |
| 06/14/1988 | CA1237979A1 Method for treatment and/or workover of injection wells |
| 06/08/1988 | EP0269630A1 Process for strengthening geological formations. |
| 06/07/1988 | US4749047 Annular wellhead seal |
| 06/07/1988 | US4749046 Well drilling and completion apparatus |
| 06/07/1988 | US4749045 Well drilling and completion apparatus |
| 06/07/1988 | US4749037 String bypass |
| 06/07/1988 | US4749036 Dual bore well treating tool |
| 06/07/1988 | US4749035 Tubing packer |
| 06/07/1988 | CA1237665A1 Tubular member anchoring arrangement and method |
| 06/07/1988 | CA1237663A1 Misalignment tieback tool - swivel connection |
| 06/07/1988 | CA1237661A1 Misalignment tieback tool - rotating casing |
| 06/07/1988 | CA1237660A1 Marine production riser and method for installing same |
| 06/07/1988 | CA1237659A1 Misalignment tieback tool - non-rotating casing |
| 06/07/1988 | CA1237658A1 Marine riser well control method and apparatus |
| 06/07/1988 | CA1237657A1 High temperature well packer |
| 05/31/1988 | US4747453 Security cover and housing for a well |
| 05/25/1988 | EP0268521A1 Lock valve |
| 05/24/1988 | US4745972 Well packer having extrusion preventing rings |
| 05/24/1988 | US4745971 Multiple string well packer |
| 05/24/1988 | US4745970 Rotating head |
| 05/24/1988 | CA1237072A1 Tubing hanger |
| 05/24/1988 | CA1237071A1 Rotating fluid manifold |
| 05/19/1988 | WO1988003597A1 Packing-seal for boreholes |
| 05/19/1988 | WO1988003596A1 Subsea systems and devices |
| 05/17/1988 | US4744698 Method and apparatus for installing marine silos |
| 05/17/1988 | US4744421 Inflatable packer systems |
| 05/17/1988 | CA1236772A1 Marine wellhead structure |
| 05/17/1988 | CA1236771A1 Remote cementing plug launching system |
| 05/11/1988 | EP0266792A2 Method and mortar composition for reconditioning a water well |
| 05/11/1988 | CN87210515U Mechanical packer for heating well |
| 05/10/1988 | US4743033 Dynamic seal assembly for piston and cylinder operating in subterranean wells |
| 05/10/1988 | US4742874 Subsea wellhead seal assembly |
| 05/10/1988 | US4742792 Communication arrangement between a sub-sea structure and floating vessel |
| 05/10/1988 | CA1236550A1 Well valve control system |
| 05/04/1988 | EP0266053A2 Downhole inflatable packer pump and testing apparatus |
| 05/04/1988 | EP0266036A2 Pressure limiter for a downhole pump and testing apparatus |
| 05/04/1988 | EP0266017A2 Rod locking device |
| 05/03/1988 | US4741402 Subsea hydraulic connector with multiple ports |
| 05/03/1988 | US4741395 Vent-well system |
| 05/03/1988 | CA1236008A1 Packer assembly |
| 05/03/1988 | CA1236006A1 Lubricator section for a wellhead |
| 04/27/1988 | EP0265341A2 Inflatable well packers |
| 04/27/1988 | EP0265054A2 Downhole string bypass apparatus |
| 04/27/1988 | EP0264973A2 Inflatable packer element |
| 04/19/1988 | CA1235374A1 Parallel flow tube apparatus |
| 04/13/1988 | EP0263722A2 Casing guide for well template |
| 04/13/1988 | CN87210993U Special packer with retaining mechanism for bare borehole |
| 04/12/1988 | US4736807 Apparatus for rotating and reciprocating well pipe |
| 04/12/1988 | US4736799 Packoff assembly for sealing the walls of an annulus |
| 04/12/1988 | US4736796 Tamp hole plug system and method |
| 04/12/1988 | US4736794 Method for the sonic cementing of down hole well casings |
| 04/05/1988 | US4735266 Method and apparatus for isolating a plurality of vertically spaced perforations in a well conduit |
| 04/05/1988 | CA1234752A1 Bonded, mechanically interconnected seal arrangement for a blowout preventer |
| 04/05/1988 | CA1234750A1 Oilfield closing device operating system |
| 03/30/1988 | EP0261909A2 Casing hanger systems |
| 03/24/1988 | DE3629220A1 Methane-drainage pipe for gas-drainage boreholes in underground working, with casing by socket pipes |
| 03/22/1988 | CA1234352A1 Method for suppressing oil well fires |
| 03/16/1988 | EP0260237A1 Connector device for an underwater pipe system |
| 03/16/1988 | EP0260143A2 Method and apparatus for installing marine silos |
| 03/15/1988 | US4730835 Anti-extrusion seal element |
| 03/15/1988 | US4730677 Method and system for maintenance and servicing of subsea wells |
| 03/15/1988 | US4730670 High temperature packer for well conduits |
| 03/10/1988 | WO1988001678A1 Method and apparatus for multi-stage cementing of a well casing |
| 03/09/1988 | EP0259170A2 Plug for use in wellbores |
| 03/08/1988 | US4729430 Pressure limiter for a downhole pump and testing apparatus |
| 03/08/1988 | US4729429 Hydraulic pressure propelled device for making measurements and interventions during injection or production in a deflected well |
| 03/02/1988 | EP0257943A2 Apparatus having a radially movable member |
| 03/02/1988 | CN85105851B Method and equipment for blocking water currents with filled sacks |
| 03/01/1988 | US4728296 Electrical adaptor for downhole submersible pump |
| 03/01/1988 | CA1233410A1 Method and apparatus for plugging a wellbore in high impulse fracturing |
| 02/24/1988 | CN87100905A Sealing and torsion-reducing device for under-water dill |
| 02/24/1988 | CN86108877A Zirconium gel water sealing agent |
| 02/23/1988 | US4726424 Well apparatus |
| 02/23/1988 | US4726422 Annular safety assembly for an oil well, especially a double production zone well |
| 02/23/1988 | US4726419 Single zone gravel packing system |
| 02/18/1988 | DE3627627A1 Injection packer |
| 02/16/1988 | US4724907 Method and device for blending surfactant mixtures for treatment of oil wells |
| 02/16/1988 | CA1232836A1 Borehole packers |
| 02/11/1988 | WO1988001010A1 Calcium-free clear high density fluids |
| 02/11/1988 | WO1988001009A1 Method and system for attaching and removing equipment from a wellhead |
| 02/09/1988 | US4723474 Pneumatic stepping actuator positioner |
| 02/09/1988 | CA1232536A1 Well casing packer |
| 02/02/1988 | US4722391 Wellhead system |