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)
12/1989
12/26/1989US4889199 Downhole valve for use when drilling an oil or gas well
12/26/1989US4889184 Polished rod stuffing box with safety valve for a beam pumped production well
12/21/1989DE3819733A1 Impact packing
12/20/1989EP0346961A2 Method and apparatus for placing a cement lining in a borehole
12/19/1989US4887672 Subsea wellhead with annulus communicating system
12/19/1989US4887669 Well closure assembly with cap-to-casing adapter
12/19/1989US4887643 Pilot actuated spool valve
12/14/1989WO1989012157A1 Liquid composition for production of a gel, and process for inserting such gel in a well
12/14/1989DE3818998A1 Process and apparatus for laying supply lines
12/13/1989CN2049262U Small diameter compression packer
12/13/1989CN1037945A Sub surface safety valve block,particularly suitable for the risers of offshore platforms
12/12/1989US4886300 Improvements in and relating to connection assemblies and components thereof
12/12/1989US4886121 Universal flexbowl wellhead and well completion method
12/12/1989US4886117 Inflatable well packers
12/12/1989US4886115 Wireline safety mechanism for wireline tools
12/12/1989CA1263840A2 Packer and service tool assembly
12/12/1989CA1263839A2 Packer and service tool assembly
12/05/1989US4884633 A hydraulic remotely-controlled bleeder valve for a well head
12/05/1989CA1263543A1 Flow basket
11/1989
11/30/1989DE3913625A1 Vorrichtung zum installieren und festlegen einer tauchpumpeneinheit in einem bohrloch Apparatus for install and set a submersible pump unit in a borehole
11/29/1989EP0344087A2 Wellhead load supporting system
11/29/1989EP0343689A2 Method for plugging lost circulation areas
11/29/1989EP0343298A2 Running tool
11/28/1989CA1263302A1 Process for remedial cementing
11/21/1989US4881599 Mechanical system for diversion in the acidizing treatment of oil formations
11/21/1989US4881598 Blow-out preventor test tool
11/21/1989US4881597 Environmentally safe locking cap for monitoring well
11/16/1989DE3901013A1 Injection packer for pressing fluid compositions into cracked structural bodies with a valve
11/15/1989CN2047713U Thermal packer
11/14/1989US4880061 Tool for running structures in a well
11/14/1989US4880058 Stage cementing valve
11/14/1989US4880025 BOP control system and methods for using same
11/09/1989DE3907637A1 Rodless drilling, pressure or cleaning implement
11/09/1989DE3809263A1 Self-locking, universally usable hydraulic borehole plug with reusable filling pipe
11/08/1989EP0340365A2 Well housing and landing shoulder
11/07/1989US4879695 Method of locating a member in a borehole
11/07/1989US4878783 Hydraulic stab connector with angular freedom
11/02/1989EP0198853B1 Marine riser well control method and apparatus
11/02/1989DE3813347A1 Borehole plug with self-restraining tube
11/01/1989CN2046923U Casing pipe auto-grouting device
11/01/1989CN2046922U Fish-able type bridge plug sealer
10/1989
10/31/1989US4877217 Fail-safe blowout preventer
10/31/1989US4877088 Process and equipment for oil well drilling and completing operations in deep water
10/31/1989US4877086 Pressure limiter for a downhole pump and testing apparatus
10/31/1989CA1262508A1 Composition and method for temporarily reducing the permeability of subterranean formations
10/25/1989EP0338165A1 Pressure controlled tool for servicing operations in a pipeline
10/25/1989EP0338154A1 Submerged actuator
10/25/1989CN2046541U Hydraulic water stoping sealing isolating apparatus for dual purpose piston
10/25/1989CN2046540U Detachable pressure crack bridge plug
10/25/1989CN1036598A Use of manganese oxide in drilling mud and oil well cement slurries
10/24/1989US4875523 Pipeline servicing tool
10/24/1989CA1262437A1 String bypass
10/18/1989CN1036447A Connector for fluid carrying conduits
10/10/1989US4872708 Production tieback connector
10/10/1989US4872508 Oil well pump leakage accumulator
10/10/1989US4872253 Apparatus and method for improving the integrity of coupling sections in high performance tubing and casing
10/04/1989CN2045422U Fast installing casinghead
10/03/1989US4871179 Inflatable packer with roughened mandrel
10/03/1989US4871018 Plugging apparatus for a gravel packer
09/1989
09/27/1989EP0334389A2 Wellhead seals
09/27/1989EP0333955A1 Wellhead valve
09/26/1989US4869535 Submerged actuator
09/26/1989US4869325 Method and apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well
09/26/1989US4869324 Inflatable packers and methods of utilization
09/26/1989US4869323 Cementing and rotating an upper well casing attached by swivel to a lower casing
09/26/1989US4869321 Method of plugging openings in well conduits
09/26/1989US4869320 Wellbore packer
09/26/1989US4869319 Wellhead structure
09/26/1989US4869318 Annulus valve for concentric tubing hangers
09/26/1989CA1261734A1 Method and apparatus for placing cement plugs in wells
09/26/1989CA1261456A1 Hydraulic pressure propulsed device for use in deviated well drilling
09/26/1989CA1261176A1 Method of, and measuring tube and measuring probe for, measuring fluid pressure in a sealed bore hole
09/26/1989CA1260254A1 Process for strengthening geological formations
09/26/1989CA1259909A1 Valve assembly for inflatable packer
09/26/1989CA1259908A1 Non-return valve
09/26/1989CA1259907A1 Gravel packer
09/26/1989CA1259906A1 Method and apparatus for hydraulically releasing from a gravel screen
09/26/1989CA1259788A1 Method for controlling lost circulation of drilling fluids with water absorbent polymers
09/21/1989WO1989008934A1 Electrical connectors
09/20/1989EP0332622A1 Subsea systems and devices.
09/19/1989US4867243 Wellhead isolation tool and setting and method of using same
09/19/1989US4867240 Method and apparatus for molding underground diaphragms
09/19/1989CA1259458A1 Wellhead structure and method of producing same
09/13/1989EP0331676A1 Packing-seal for boreholes.
09/13/1989CN2044283U Self-sealing direction adjustable seal for lever
09/12/1989US4865490 Portable wellhead and welder protector system
09/12/1989US4865127 Method and apparatus for repairing casings and the like
09/12/1989CA1259356A1 Remotely operable pipe length connector and compensator
09/07/1989DE3806407A1 Arrangement for producing soil sections compacted with the addition of binding or sealing agents
09/06/1989EP0331227A1 Sub surface safety valve block, particularly suitable for the risers of offshore platforms
09/06/1989EP0330769A1 Tubular joint with seal, method for repairing seal, and repair part insert
09/05/1989US4864128 Method of introducing a radioactive substance into a well
09/05/1989US4862967 Method of employing a coated elastomeric packing element
09/05/1989US4862966 Liner hanger with collapsible ball valve seat
09/05/1989US4862961 Retrievable tension-set packer
09/05/1989US4862960 Blowout preventer testing apparatus
09/05/1989US4862957 Packer and service tool assembly
09/05/1989CA1259087A1 Inverted cone stuffing box
08/1989
08/30/1989EP0329895A2 Hanger and seal assembly
08/30/1989EP0221154B1 Mechanical drive packer
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