Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 33 - Sealing or packing boreholes or wells
Patents for E21B 33 - Sealing or packing boreholes or wells (33,564)
04/1982
04/06/1982US4323118 Apparatus for controlling and preventing oil blowouts
04/06/1982US4323117 Method and means for emergency shearing and sealing of well casing
04/06/1982US4322969 Gas pressure relieving hydrostatic tester
03/1982
03/31/1982EP0048342A2 Process and apparatus to supply a pressure fluid which is pumped with a variable pressure
03/30/1982US4321975 Slurry diverter
03/24/1982EP0047878A2 Process and apparatus for measuring foundation injection pressure
03/23/1982US4320994 Preparation of grout for stabilization of abandoned in-situ oil shale retorts
03/23/1982US4320804 Subsea test tree
03/23/1982US4320803 Valve retrieval mechanism for an inflatable packer system
03/23/1982US4320800 Inflatable packer drill stem testing system
03/16/1982US4319773 Fastener and devices in which load supporting members are secured thereby
03/16/1982US4319638 Apparatus for cementing from a floating vessel
03/16/1982US4319637 Well tool orientation system with remote indicator
03/10/1982EP0046801A1 Packer arrangements for oil wells and the like.
03/03/1982EP0046651A2 Method and apparatus for obtaining selected samples of formation fluids
03/02/1982US4317587 Split fastening ring and assemblies employing same
03/02/1982US4317557 Emergency blowout preventer (BOP) closing system
03/02/1982US4317488 Apparatus for use in placing a submarine structure on the sea bed alongside an underwater well and method of drilling a plurality of closely spaced underwater wells
03/02/1982US4317486 Cementing head apparatus and method of operation
02/1982
02/23/1982US4316814 Seal for a storage bore hole accommodating radioactive waste and method of applying the seal
02/23/1982US4316506 Oil well blow-out safety system
02/23/1982US4316504 Check/relief valve for an inflatable packer system
02/16/1982US4315543 Seal system for wellhead isolation tool diffuser
02/16/1982CA1118343A1 Plug for eliminating troublesome zones in wells
02/16/1982CA1118342A1 Method and apparatus for hydraulically controlling subsea equipment
02/16/1982CA1118217A1 Storage arrangement for radioactive waste
02/16/1982CA1118200A1 Apparatus and method for positioning one part relative to another part
02/09/1982US4314608 Method and apparatus for well treating
02/09/1982CA1117865A1 Flow plug
02/05/1982EP0036019A4 Well treating fluid.
02/02/1982US4313694 Submersible pipe installation systems
02/02/1982US4313497 Pressure control valve
02/02/1982US4313496 Wellhead shearing apparatus
02/02/1982US4313495 Downhole pump with pressure limiter
01/1982
01/26/1982US4312524 Self-aligning coupling
01/26/1982US4312405 Cementing procedure for casing
01/26/1982US4312404 Rotating blowout preventer
01/19/1982US4311314 Well packer
01/19/1982US4311196 Tangentially loaded slip assembly
01/19/1982US4311195 Hydraulically set well packer
01/19/1982CA1116511A1 Fluid pressure set and released well packer apparatus
01/12/1982US4310161 Inflatable packer element
01/12/1982US4310139 Annular blowout preventer
01/12/1982US4310052 Offshore structure for production of hydrocarbons
01/05/1982US4309734 Methods and apparatus for limiting electrical current to a subsea petroleum installation
01/05/1982US4308918 Blowout preventer
01/05/1982US4308916 Pitless connection incorporating pressure relief valve
01/05/1982US4308884 Method for transmission of pressure signals through a conduit
12/1981
12/29/1981US4307902 Riser connector
12/29/1981US4307783 Method and apparatus for conducting wireline operations during blowout conditions in oil and gas wells
12/29/1981US4307781 Constantly energized no-load tension packer
12/22/1981US4306742 Pipe hanger
12/22/1981US4306624 System for preventing hydrate plug formation in gas wells
12/22/1981US4306447 Y-Ram tester
12/22/1981CA1114741A1 Isolating packer units in geological and geophysical measuring casings
12/22/1981CA1114740A1 Sea-floor shoring cellar and method of installing the same
12/22/1981CA1114738A1 Method of applying tensile stress to a casing
12/22/1981CA1114737A1 Polyurethane ball sealers for well treatment fluid diversion
12/15/1981US4305565 Variable position ram lock for blowout preventers
12/15/1981US4305463 Oil recovery method and apparatus
12/15/1981US4305461 Well pumping apparatus
12/15/1981CA1114265A1 Adjustable relief valve
12/08/1981US4304310 Drilling head
12/08/1981US4304300 Hydratable polymer blend spacer fluid
12/01/1981CA1113382A1 Offshore platform retrievable plug
12/01/1981CA1113381A1 Automatic coupling of two non aligned conduit sections
12/01/1981CA1113234A1 Micro-emulsions suitable for use as spacers in brorchole cementing
11/1981
11/26/1981WO1981003356A1 A method and apparatus for lining holes formed when drilling through earth layers
11/24/1981US4302341 Gelled aqueous well treating fluids
11/24/1981US4302018 Packer arrangements for oil wells and the like
11/24/1981US4301840 Fixed turret subsea hydrocarbon production terminal
11/24/1981CA1113136A1 Sealing member for use in well shafts
11/24/1981CA1113002A1 Well head retriever tool and method
11/17/1981US4300750 Position indicating valves
11/17/1981US4300637 Tool for remotely determining the position of a device in an underwater well assembly
11/17/1981US4300633 Method of cementing wells with foam-containing cement
11/17/1981US4300631 Flexible continuous grout filled packer for use with a water infusion system
11/17/1981US4300373 Well Christmas tree guard apparatus
11/17/1981CA1112559A1 Casing assembly probes
11/17/1981CA1112557A1 Sampler and measurement apparatus
11/12/1981WO1981003143A1 Blender apparatus
11/10/1981US4299397 Inflatable packer assembly with control valve
11/10/1981US4299395 Geothermal well head assembly
11/10/1981US4299284 Pretreatment by injection of a diverter fluid containing a surfactant
11/10/1981US4299281 Compensating bridge plug
11/10/1981US4299280 Tool retaining apparatus
11/10/1981US4299260 Hydrocarbon production terminal
11/10/1981CA1112157A1 Well tubing coupling system
11/03/1981US4298067 Method and apparatus for installing multiple pipe strings in underwater wells
11/03/1981US4298065 Pitless adapter
11/03/1981US4298064 Remotely operated coupling and well devices employing same
11/03/1981US4297965 Tension leg structure for tension leg platform
10/1981
10/27/1981US4296910 Hydraulically controlled safety valve
10/27/1981US4296808 Isolation packer extension
10/27/1981US4296807 Crossover tool
10/27/1981US4296806 High temperature well packer
10/20/1981US4295665 Well casing suspension system
10/20/1981US4295536 Pressure seal for pumping instruments through drill rod
10/20/1981US4295529 Blow-out preventor
10/20/1981US4295524 Isolation gravel packer
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