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)
11/1990
11/14/1990CN1046956A Manual port closing tool for well cmenting
11/13/1990US4969627 Rod locking device
11/13/1990US4969519 Subsea hanger and running tool
11/13/1990US4969517 Sub-mudling casing hanger/packoff
11/13/1990US4969516 Packoff running tool with rotational cam
11/13/1990US4969515 Expendable devices for well lock system
11/13/1990US4969390 Rod locking device
11/13/1990CA1276102C Subsurface stuffing box assembly
11/06/1990US4968187 System for backfilling a subterranean void
11/06/1990US4967846 Progressively inflated packers
11/06/1990US4967844 Selectively operable ball valve and production packer system
11/06/1990US4967842 Sub surface safety valve block, particularly suitable for the risers of offshore platforms
10/1990
10/31/1990CN2064819U Combined multifunctional oil production wellhead assembly
10/31/1990CN2064818U Piston rod sealer for pumping oil
10/30/1990US4966237 Method of effecting expanding chemical anchor/seals for rock cavities
10/30/1990US4966236 Cementing method and arrangement
10/28/1990CA2015592A1 Method and apparatus for chemical treatment of subterranean well bores
10/28/1990CA2008152A1 Downhole pump
10/23/1990US4964610 Manual blowout preventer with invertible rams
10/23/1990US4964465 Method employing liquidized sand for controlling lost circulation of drilling fluids
10/23/1990US4964462 Tubing collar position sensing apparatus, and associated methods, for use with a snubbing unit
10/18/1990WO1990012236A1 Seals for co-axial tubes
10/18/1990WO1990010139A3 Undersea package and installation system
10/17/1990EP0392964A2 Locking ring for oil well tool
10/17/1990CN2063975U Blowout-proof apparatus of oil well
10/17/1990CN2063974U Full hydraulic blowout-proof working machine
10/17/1990CN1046150A Cement foaming agent for well cementation of oil-gas well and preparation method thereof
10/16/1990US4962952 Pressure tube with deflecting section
10/16/1990US4962815 Inflatable straddle packer
10/16/1990US4962814 Optimization of cyclic steam in a reservoir with inactive bottom water
10/16/1990US4962812 Tubular system for use in packing off a well bore
10/10/1990EP0391541A1 Wear bushing retrieval tool
10/09/1990US4961465 Casing packer shoe
10/04/1990WO1990012194A1 Device for blocking off a well in open flow
10/03/1990CN2063165U Compensator for water-injecting pipe string
10/03/1990CA2012534A1 Wear bushing retrieval tool
10/02/1990US4960181 Method and device for improving the coefficient of transmission to geological formations of energy created by a well seismic source
10/02/1990US4960174 Equipment for oil well drilling and completing operations in deep water
10/02/1990US4960172 Casing hanger seal assembly with diverging taper
10/02/1990CA1274770A1 Well apparatus
10/02/1990CA1274721A1 Downhole inflatable packer pump and testing apparatus
09/1990
09/25/1990US4958686 Subsea well completion system and method of operation
09/25/1990US4958685 Method for plugging lost circulation areas and lost circulation material to be used therefor
09/20/1990WO1990010779A1 Drilling head
09/18/1990CA1274265A1 Tubular connector
09/11/1990US4955436 Seal apparatus
09/11/1990CA1273869A1 Sealing structure for the upper end of a rising or conveying pipeline
09/05/1990CN1009470B Casing patch seal
09/04/1990US4953636 Electrical conductor arrangements for pipe system
09/04/1990US4953618 Apparatus for use on a well
09/04/1990US4953617 Apparatus for setting and retrieving a bridge plug from a subterranean well
08/1990
08/29/1990CN2061206U Self-injecting mud back-pressure valve
08/29/1990CN2061205U Blow-out preventer under well
08/29/1990CN2061204U Self-adjustable wellhead sealing device
08/28/1990US4951988 Casing hanger packoff retrieving tool
08/28/1990US4951972 Rotatable sealing assemblies
08/28/1990US4951760 Remote control actuation device
08/28/1990US4951751 Diverting technique to stage fracturing treatments in horizontal wellbores
08/28/1990US4951747 For use in a subterranean well bore
08/28/1990US4951745 Stuffing box and grease injector for underwater wells
08/28/1990US4951743 Environmental leakage protector for recirocating rod fluid displacement arrangements
08/28/1990CA1273287A1 Use of ball sealers in co.sub.2 or steam injection wells
08/25/1990WO1990010139A2 Undersea package and installation system
08/22/1990EP0383494A2 Retrievable bridge plug and packer apparatus
08/22/1990EP0382760A1 Connector for fluid carrying conduits.
08/22/1990CN2060809U Split casing heads
08/22/1990CN2060808U Packer in the borehole
08/21/1990US4949796 Drilling head seal assembly
08/21/1990US4949793 Method and apparatus for completion of a well
08/21/1990US4949792 Packer assembly and means for activating same only in smaller diameter well conduit
08/21/1990US4949788 Well completions using casing valves
08/21/1990US4949787 Casing hanger seal locking mechanism
08/21/1990US4949786 Emergency casing hanger
08/21/1990US4949785 Force-limiting/wear compensating annular sealing element for blowout preventers
08/21/1990US4949784 Wellhead leak containment
08/21/1990CA1273046A1 Anti-corrosive stuffing box bearings
08/16/1990EP0382677A1 Wellhead casing hanger support mechanism
08/15/1990CN2060473U Trace type sucker rod sealing device
08/14/1990CA1272684A1 Wellhead isolation tool nipple
08/10/1990CA2009872A1 Steam injection survey apparatus and method for testing wells
08/08/1990CN1044513A Post grouting process for water bearing sand strata behind the wall
08/02/1990WO1990008878A1 Tubing conveyed wellbore fluid flow measurement system
08/02/1990CA2026317A1 Tubing conveyed wellbore fluid flow measurement system
08/01/1990EP0380148A1 Deployement/ retrieval method and apparatus for well tools used with coiled tubing
08/01/1990CN2059937U Double-stage cement pouring device
07/1990
07/31/1990US4944348 Gravel packing assembly
07/31/1990CA1272121A1 Single zone gravel packing system
07/26/1990WO1990008406A1 Subsea electrical conductive insert coupling
07/25/1990EP0379376A1 A Hanger
07/25/1990EP0379270A2 Hydraulic power system
07/24/1990US4943031 Blowout preventer
07/24/1990US4942925 Liner isolation and well completion system
07/24/1990US4942924 Liner setting assembly and method
07/24/1990US4942923 Apparatus for isolating a testing zone in a bore hole screen casing
07/24/1990CA1271953A1 Pressure limiter for a downhole pump and testing apparatus
07/18/1990EP0378040A1 Casing hanger running and retrieval tools
07/18/1990EP0377928A1 Elastomer seal structure
07/18/1990EP0377806A2 Method for setting well casing using a resin coated particulate
07/18/1990CN2059451U Overflow-proof blowout-preventing drilling joint
07/18/1990CA2008039A1 Subsea electrical conductive insert coupling
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