| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 04/28/1981 | US4263968 Hydraulic set and straight pull release well packer |
| 04/21/1981 | US4262748 Remote multiple string well completion |
| 04/21/1981 | US4262743 Diffuser for wellhead isolation tool |
| 04/21/1981 | US4262742 Downhole seal for low profile oil well pumping installations |
| 04/21/1981 | US4262702 Conductor pipe plug |
| 04/16/1981 | WO1981001028A1 High temperature well packer |
| 04/15/1981 | EP0027025A1 Apparatus for controlling subsea well template production systems |
| 04/14/1981 | CA1099212A1 Method and apparatus for protecting subsea wells |
| 04/14/1981 | CA1099211A1 Enhanced oil recovery process utilizing a plurality of wells |
| 04/07/1981 | US4260289 Connection-disconnection device between tubing and underwater wellhead for use with articulated production installations |
| 04/07/1981 | US4260164 Inflatable packer assembly with control valve |
| 04/07/1981 | US4260022 Through the flow-line selector apparatus and method |
| 04/07/1981 | US4260017 Cementing collar and method of operation |
| 04/02/1981 | WO1981000851A1 Well treating fluid |
| 03/31/1981 | US4258926 High temperature well packer |
| 03/31/1981 | US4258794 Underwater completion habitat |
| 03/31/1981 | US4258788 CPI Casing |
| 03/31/1981 | US4258787 Subterranean well injection apparatus |
| 03/17/1981 | US4256282 Subsea valve apparatus having hydrate inhibiting injection |
| 03/10/1981 | US4255068 Method and a device for undersea drilling |
| 03/10/1981 | US4254832 Sampler and measurement apparatus |
| 03/03/1981 | US4253676 Inflatable packer element with integral support means |
| 03/03/1981 | US4253638 Blowout preventer |
| 03/03/1981 | US4253522 Gravel pack tool |
| 03/03/1981 | US4253521 Setting tool |
| 03/03/1981 | CA1096769A1 Closing cap on well casings in well openings |
| 02/25/1981 | EP0024214A2 A by-pass valve for a well testing apparatus |
| 02/25/1981 | EP0024180A2 Guides for use in making pipe connections and a method of making pipe connections |
| 02/24/1981 | US4252195 Well test systems and methods |
| 02/24/1981 | US4252187 Bearing-equipped well tool |
| 02/24/1981 | CA1096302A1 High temperature well packer |
| 02/17/1981 | US4251176 Well tubing handling apparatus |
| 02/17/1981 | US4250966 Insertion type cementing baffle |
| 02/17/1981 | US4250963 Selective permeability reduction with polymerizable monomers around steam injection wells |
| 02/17/1981 | US4250918 Rotary joint device with multiple piping passages, in particular for loading or transfer columns on marine sites |
| 02/17/1981 | CA1095830A1 Method for tensioning casing in thermal wells |
| 02/10/1981 | US4249610 Offshore drilling control cable clamp system |
| 02/10/1981 | US4249576 Retrievable plug for offshore platforms having shear type retaining means |
| 02/10/1981 | CA1095401A1 Split-stack blowout prevention system |
| 02/04/1981 | EP0023399A2 Method and apparatus for testing petroleum wells |
| 02/04/1981 | EP0023383A1 Cementing head apparatus and method of injecting a cementing plug into a well casing |
| 02/03/1981 | US4248299 Packer nose assembly |
| 02/03/1981 | US4248265 Adjustable relief valve |
| 02/03/1981 | CA1094949A1 Rotating blowout preventor with rigid washpipe |
| 02/03/1981 | CA1094945A1 Well tree saver |
| 01/28/1981 | EP0023012A2 Apparatus for the remote control of oil or gas wells |
| 01/27/1981 | US4246968 Cementing tool with protective sleeve |
| 01/27/1981 | US4246967 Cementing head apparatus and method of operation |
| 01/27/1981 | US4246964 Down hole pump and testing apparatus |
| 01/13/1981 | US4244908 Cure-in-place process for seals |
| 01/13/1981 | US4244590 Inflatable packer construction |
| 01/13/1981 | CA1093460A1 Placement method and apparatus for low density ball sealers |
| 01/13/1981 | CA1093458A1 Well testing tool system |
| 01/07/1981 | EP0021589A1 Retrievable bridge plug tool and method for plugging off a well casing therewith |
| 01/06/1981 | CA1092968A1 Hydraulic test tool and method |
| 12/30/1980 | US4241786 Well tree saver |
| 12/30/1980 | CA1092509A1 Tubing hanger for temperature variations and extremes |
| 12/23/1980 | US4240767 Valving methods and apparatus for flooding and grouting offshore jacket sleeves |
| 12/23/1980 | US4240503 Blowout preventer shearing and sealing rams |
| 12/16/1980 | US4239112 Plug for eliminating troublesome zones in wells |
| 12/16/1980 | CA1091577A1 Hydraulically controlled safety valve |
| 12/09/1980 | US4237979 Valve for hydraulic setting packer setting tool and method of setting a hydraulically settable packer therewith |
| 12/09/1980 | CA1091146A1 Automatic device for positioning and coupling two submerged blocks |
| 12/09/1980 | CA1091145A1 Well casing hanger assembly |
| 12/02/1980 | US4236734 Well tubing coupling system |
| 11/25/1980 | US4236113 Electrical well logging tool, having an expandable sleeve, for determining if clay is present in an earth formation |
| 11/18/1980 | US4234197 Conduit sealing system |
| 11/18/1980 | US4234043 Removable subsea test valve system for deep water |
| 11/18/1980 | CA1089762A1 Well tool |
| 11/18/1980 | CA1089760A1 Method for placing ball sealers onto casing perforations |
| 11/18/1980 | CA1089660A1 Plat-gard leg closure |
| 11/11/1980 | US4232736 Leak detection system and control using non-rigid bladder |
| 11/04/1980 | US4231617 Consolidation of in-situ retort |
| 10/28/1980 | US4230190 Blow out preventer handling system |
| 10/28/1980 | US4230187 Methods and apparatus for sensing wellhead pressure |
| 10/28/1980 | US4230186 Simplified subsea production wellhead |
| 10/28/1980 | US4230180 Isolating packer units in geological and geophysical measuring casings |
| 10/28/1980 | CA1088417A1 Device for cleaning widening and repairing of wells |
| 10/28/1980 | CA1088413A1 Well testing tool |
| 10/21/1980 | US4229122 Hole filling and sealing method and apparatus |
| 10/21/1980 | US4229027 Remote automatic make-up stab-in sealing system |
| 10/21/1980 | US4229012 Variable bore packer assembly for ram-type blowout preventers |
| 10/21/1980 | US4228704 Marine riser tool |
| 10/14/1980 | US4227543 Blowout preventer |
| 10/14/1980 | CA1087522A1 Full flow tubing plug |
| 10/14/1980 | CA1087520A2 Seal adaptor alignment means and landing tool and method |
| 10/14/1980 | CA1087407A1 Articulated column for the exploitation of marine bottom resources, comprising pipings connectable between the column and its base |
| 10/07/1980 | US4226286 Pitless adapter |
| 09/30/1980 | US4224987 Well tool |
| 09/30/1980 | US4224985 Containment of pressurized fluid jets |
| 09/30/1980 | CA1086640A1 Packer with chemically activated sealing member and method of use thereof |
| 09/23/1980 | US4223920 Vertically retrievable subsea conduit connector |
| 09/23/1980 | US4223738 Production well-heads for underwater oil wells |
| 09/23/1980 | US4223737 Method for well operations |
| 09/23/1980 | US4223724 Device for cleaning, widening and repairing wells of drinking water and irrigation water |
| 09/23/1980 | CA1086223A1 Split-ring riser latch |
| 09/17/1980 | EP0015726A1 Method relating to the pumping of fluid along a tubular structure in a bore of a well and tubular component for use in such structure |
| 09/16/1980 | US4222592 Toggle mechanism connector |
| 09/16/1980 | US4222590 Equally tensioned coupling apparatus |
| 09/16/1980 | US4222444 Method of well fluid leak prevention |