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)
11/1998
11/05/1998WO1998049422A1 Apparatus and method for subsea connections of trees to subsea wellheads
11/05/1998DE19718688A1 Method of securing ground surrounding disused and filled mine-shaft
11/04/1998EP0875657A2 Method of sealing subterranean zone
11/04/1998EP0527932B1 Preform device and process for coating and/or lining a cylindrical volume
11/03/1998US5831156 Downhole system for well control and operation
11/03/1998US5829526 Method and apparatus for placing and cementing casing in horizontal wells
11/03/1998US5829524 Method of preparing a downhole casing tubular
11/03/1998US5829523 Method of cementing a string of casing disposed in a wellbore
11/02/1998CA2204297A1 Improved blowout preventer
10/1998
10/29/1998WO1998048143A1 Downhole surge pressure reduction system and method of use
10/27/1998US5826662 Apparatus for testing and sampling open-hole oil and gas wells
10/27/1998US5826661 Linear indexing apparatus and methods of using same
10/27/1998US5826652 Packer-setting assembly
10/20/1998US5823541 Rod seal cartridge for progressing cavity artificial lift pumps
10/20/1998US5823273 Well stabilization tools and methods
10/20/1998US5823267 Universal pipe and tubing injection apparatus and method
10/20/1998US5823256 Ferrule--type fitting for sealing an electrical conduit in a well head barrier
10/15/1998WO1998019042A3 Method and apparatus to isolate a formation zone
10/14/1998EP0870898A1 Method for injection treatment of a formation of little deformability and sleeve for use with the method
10/14/1998CN2294329Y Spiral cutting-line type 'T' shaped sealing
10/13/1998US5820416 Multiple contact wet connector
10/13/1998US5819854 Activation of downhole tools
10/13/1998US5819852 Monobore completion/intervention riser system
10/13/1998US5819851 Blowout preventer protector for use during high pressure oil/gas well stimulation
10/13/1998US5819850 Geotechnical grouting device and method
10/13/1998US5819846 Bridge plug
10/13/1998CA2114619C Improved sub-sea test tree apparatus
10/07/1998EP0869257A2 Primary well cementing
10/07/1998CN2293641Y Internal hole pluging device for maintenance of wellhead valve arrangement
10/07/1998CN1195389A Inflatable tubular sleeve for tubing or obturating well or pipe
10/06/1998US5816748 Method for sealing off ground sites
10/01/1998WO1998042948A1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production
09/1998
09/30/1998EP0866911A1 Improved measurement port coupler and probe interface
09/30/1998CN2292900Y Packer for combination oil production by layer
09/30/1998CN2292899Y 热采封隔器 Thermal Recovery Packer
09/30/1998CN2292898Y Rotary well shut-in device
09/30/1998CA2233468A1 Primary well cementing methods and apparatus
09/29/1998US5813470 Means for relieving load on stacked casing hangers
09/29/1998US5813468 Dual casing hanger
09/29/1998US5813463 Method of completing welbores to control fracturing screenout caused by multiple near-welbore fractures
09/29/1998US5813460 Formation evaluation tool and method for use of the same
09/29/1998US5813459 For use in a subterranean well bore
09/29/1998US5813457 Wellbore cementing system
09/29/1998US5813456 Retrievable bridge plug and retrieving tool
09/29/1998US5813455 Chemical dispensing system
09/29/1998CA2144023C Short wellhead plug
09/24/1998WO1998041811A1 Device to facilitate the placing of slurries in up-holes
09/24/1998WO1998041732A1 Wellhead device for retaining the solid particles carried by the production fluid
09/24/1998WO1998041730A1 Arrangement in a subsea production control system
09/24/1998CA2283686A1 Wellhead device for retaining the solid particles carried by the production fluid
09/23/1998EP0866211A2 Stabilizing and cementing lateral well bores
09/23/1998EP0865563A1 Plug launching device
09/23/1998EP0676002B1 Anti-rotation devices for use with well tools
09/23/1998CN2292161Y Water-filling packer squirm eliminating device
09/23/1998CN2292160Y Sealing device for petroleum sucker rod
09/22/1998US5810515 Protective device for an installation mounted on the seabed
09/22/1998US5810086 Single riser with two wellheads
09/22/1998US5810085 Drill hole plugging method utilizing sodium bentonite nodules
09/22/1998US5810083 For utilization in a subterranean wellbore
09/22/1998US5810082 Hydrostatically actuated packer
09/22/1998US5809916 Inserting device for coiled tubing
09/17/1998CA2232019A1 Stabilizing and cementing lateral well bores
09/16/1998EP0864725A1 Oil-based compositions for sealing subterranean zones
09/16/1998EP0864032A1 Method of treating an underground formation
09/16/1998EP0864031A1 Tubing injection system for oilfield operations
09/15/1998US5808192 Arrangement for acquiring downhole information
09/15/1998US5806599 Method for accelerating production
09/15/1998US5806596 One-trip whipstock setting and squeezing method
09/15/1998US5806594 Portland cement, alpha plaster of peris, water, foaming and foam stabilizing agents; foaming the mixture with an inert foaming gas
09/15/1998US5806590 Torque-resistant slip
09/11/1998WO1998039550A1 Structure for the production of oil and/or gas at sea
09/11/1998WO1998039548A1 Subsea manifold stab with integral check valve
09/09/1998CN2290691Y Layered water clogging tool
09/09/1998CN2290690Y Oil well dirt-proof choke appts.
09/09/1998CN2290689Y Box type side flow blowout-proof pressure cap
09/08/1998US5804714 Flow meter
09/08/1998US5803191 Well entry tool
09/08/1998US5803186 Formation isolation and testing apparatus and method
09/08/1998US5803178 For recovering formation fluids from subsurface zones
09/08/1998US5803177 Well treatment fluid placement tool and methods
09/08/1998US5803175 Perforating gun connection and method of connecting for live well deployment
09/08/1998US5803173 Liner wiper plug apparatus and method
09/08/1998US5803172 Mine shaft and adit closure apparatus and method
09/08/1998US5803169 Rotary stuffing box and seal assembly
09/08/1998US5803167 Computer controlled downhole tools for production well control
09/04/1998CA2230425A1 Alignment system for a slip
09/03/1998WO1998038411A2 Apparatus for use in drilling operations
09/02/1998CN2289875Y Self-lubricating anti-pollution polish rod sealer
09/01/1998US5800096 Subsurface barrier wall and method of installation
09/01/1998US5799733 Method of servicing a well
09/01/1998US5799730 Wellhead casing hanger assembly
09/01/1998CA2129835C Template and process for drillng and completing multiple wells
08/1998
08/26/1998CN2289054Y Suction hydraulic blow-out preventer
08/26/1998CN2289053Y Oil well hydraulic plunger sealing suction blow-out preventer
08/26/1998CN1191586A Apparatus and process for drilling and completing multiple wells
08/20/1998WO1998036152A1 Inflatable downhole seal
08/19/1998EP0859119A2 Template and process for drilling and completing multiple wells
08/19/1998EP0858550A1 Sampling device
08/19/1998CN2288265Y Movable lubricating polish rod sealer
08/18/1998US5795169 Elevated electrical connector assembly
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