| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 10/30/1991 | EP0454465A2 External sleeve downhole cementing tool |
| 10/30/1991 | CN1055793A Cement tank vehicle |
| 10/29/1991 | US5060985 Location of tubular members |
| 10/29/1991 | US5060724 Casing hanger seal locking mechanism with detent |
| 10/29/1991 | US5060723 Wellhead isolation tool nipple |
| 10/27/1991 | CA2041270A1 Well bore packing apparatus and methods of drilling thereof |
| 10/23/1991 | EP0453358A1 Device for collecting and evacuating fermentation gases, emanating in particular from municipal waste, dumped and layered in a refuse-pit |
| 10/23/1991 | EP0453052A2 Well bore measurement tool |
| 10/23/1991 | EP0453051A2 Well bore measurement tool |
| 10/22/1991 | US5058903 Drill rod seal |
| 10/22/1991 | US5058684 Drill pipe bridge plug |
| 10/22/1991 | US5058679 Solidification of water based muds |
| 10/22/1991 | US5058673 Hydraulically set packer useful with independently set straddle packers including an inflate/deflate valve and a hydraulic ratchet associated with the straddle packers |
| 10/22/1991 | US5058672 Landing collar and float valve assembly |
| 10/22/1991 | US5058671 Pipe insert assembly |
| 10/22/1991 | US5058668 Rod guide bearing assembly for oil well pumping apparatus |
| 10/17/1991 | WO1991015740A1 Integrated sensor-transducer device and pressure sensor-transducer |
| 10/17/1991 | DE4109010A1 Equipment for extinguishing burning oil-wells - by surrounding burning area with material that prevents or restricts entry of air |
| 10/16/1991 | EP0452033A2 A fluid flow control system, assembly and method for oil and gas wells |
| 10/16/1991 | EP0451185A1 System and method for sealed connection between two abutting tube ends. |
| 10/16/1991 | CN2086791U Rotary portal of pipe for oil-pumping well |
| 10/16/1991 | CN2086790U Permanent bridge-chock packer |
| 10/16/1991 | CN1014334B Whipstock packer assembly |
| 10/15/1991 | US5056418 Self-adjusting automatic locking piston for RAM blowout preventers |
| 10/15/1991 | CA1290684C Back pressure plug tool |
| 10/13/1991 | CA2037791A1 Fluid flow control system, assembly and method for oil and gas wells |
| 10/10/1991 | DE4010638A1 Underground storage of containers of radioactive waste |
| 10/09/1991 | EP0450676A1 Equipment for remote launching of cementing plugs into subsea drilled wells |
| 10/09/1991 | CN1055218A Equipment for completion of well |
| 10/08/1991 | US5054558 Equalizing blank valve apparatus and methods |
| 10/08/1991 | US5054556 Method of and means for operating geothermal wells |
| 10/08/1991 | CA1290242C Polished rod stuffing box with safety valve for a beam pumped production well |
| 10/02/1991 | EP0448871A2 Weight set connecting mechanism for subsea tubular members |
| 10/02/1991 | CN1055033A Drag analysis method |
| 10/01/1991 | WO1991015692A1 Improvements in or relating to subsea control systems and apparatus |
| 10/01/1991 | US5052941 Inductive-coupling connector for a well head equipment |
| 10/01/1991 | US5052492 Method for sealing an elongated, hollow cavity, and a device for carrying out the method |
| 10/01/1991 | US5052488 Plug apparatus and method for cementing a liner in a well bore |
| 10/01/1991 | US5052483 Sand control adapter |
| 10/01/1991 | US5052220 Apparatus for measurements related to fluid flow in a borehole |
| 10/01/1991 | CA2030210A1 Single plug arrangement, lock therefor and method of use |
| 10/01/1991 | CA1289869C Well head with adjustable flow for the exploitation of biogas |
| 10/01/1991 | CA1289867C Drainhole well completion |
| 09/25/1991 | EP0448218A1 Accelerating the set of cement compositions in wells |
| 09/25/1991 | CN2085414U Injecting and emission device for gas emission and liquid injecting for coal bed |
| 09/25/1991 | CN1054824A Prescription and technlogy for infrared radiation heater |
| 09/25/1991 | CN1014084B Method and apparatus for multi-stage cementing of well casing |
| 09/24/1991 | US5051103 Electrical coupling assembly for hot, high pressure service |
| 09/24/1991 | US5050690 In-situ stress measurement method and device |
| 09/24/1991 | US5050680 Environmental protection for subsea wells |
| 09/24/1991 | US5050679 Method of sealing contaminated wells |
| 09/24/1991 | US5050673 Lift through plug container for slant rig |
| 09/24/1991 | CA1289467C Tubing packer |
| 09/24/1991 | CA1289465C Method of securing a tubular member within an annular well member, the combined well structure and the tool therefor |
| 09/23/1991 | CA2038798A1 Head assembly for pump down equipment |
| 09/18/1991 | EP0447204A2 Inflatable packer with inflatable packing element for use in subterranean wells |
| 09/18/1991 | EP0446976A2 Gravel packer and service tool |
| 09/18/1991 | EP0446517A2 Long stroke packer |
| 09/18/1991 | CN2084978U Superhigh pressure drivepipe head |
| 09/18/1991 | CN1054644A Equipment for remote launching of cementing plugs into sub-sea drilled wells |
| 09/17/1991 | US5048613 Wireline resettable packoff assembly |
| 09/17/1991 | US5048610 Single bore packer with dual flow conversion for gas lift completion |
| 09/17/1991 | US5048606 Setting tool for a liner hanger assembly |
| 09/17/1991 | US5048605 Packing-seal for boreholes |
| 09/17/1991 | US5048603 Lubricator corrosion inhibitor treatment |
| 09/17/1991 | CA2023236A1 Long stroke packer |
| 09/17/1991 | CA1289064C Wellhead seal assembly |
| 09/17/1991 | CA1289063C Wellhead seal |
| 09/17/1991 | CA1289060C Subsea wellhead seal assembly |
| 09/17/1991 | CA1289059C Wellhead annular seal |
| 09/17/1991 | CA1289058C Subsea riser for multiple bore wells |
| 09/17/1991 | CA1289056C Method and apparatus for multi-stage cementing of a well casing |
| 09/11/1991 | EP0445941A1 Incrementally increasing density cementing spacer fluid |
| 09/10/1991 | US5046896 Inflatable buoyant near surface riser disconnect system |
| 09/10/1991 | US5046855 Mixing apparatus |
| 09/10/1991 | US5046558 Method and apparatus for repairing casings and the like |
| 09/10/1991 | US5046557 Well packing tool |
| 09/10/1991 | CA1288685C Cement control valve device or sub |
| 09/05/1991 | WO1991013237A1 Drag analysis method |
| 09/05/1991 | WO1991013234A1 Device for protecting wells from corrosion or deposits caused by the nature of the fluid produced or located therein |
| 09/05/1991 | WO1991013233A1 Releasable hydraulic and/or electric connection for subsea equipment |
| 09/03/1991 | US5044603 Variable bore ram rubber with non-overlapping inserts |
| 09/03/1991 | US5044602 Blowout preventer |
| 09/03/1991 | US5044444 Method and apparatus for chemical treatment of subterranean well bores |
| 09/03/1991 | US5044442 Casing hanger running tool using annulus pressure |
| 09/03/1991 | US5044441 Pack-off well apparatus and method |
| 09/03/1991 | US5044434 Long stroke packer |
| 09/03/1991 | US5044433 Pack-off well apparatus with straight shear release |
| 09/03/1991 | US5044432 Well pipe hanger with metal sealing annulus valve |
| 08/28/1991 | CN2083627U 热洗封隔器 Hot wash packer |
| 08/28/1991 | CN1054074A Preparation method of cement resistance reducing agent for oil well |
| 08/27/1991 | US5042960 Method for supporting offshore well caisson |
| 08/27/1991 | US5042530 Subsea wellhead apparatus |
| 08/27/1991 | CA2036835A1 Incrementally increasing density cementing spacer |
| 08/21/1991 | CN2083190U Underground blowout preventer |
| 08/21/1991 | CN1013605B Method and implements for retarding subsiding of earth surface above coal mine |
| 08/21/1991 | CN1013604B Releasing installation of bridge plug device |
| 08/21/1991 | CA2076008A1 Releasable hydraulic and/or electric connection for subsea equipment |
| 08/20/1991 | US5040608 Anchorable pack-off assembly and method of seating the same |
| 08/20/1991 | US5040606 Annulus safety valve |