| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 08/18/1998 | US5794696 From a well borehole |
| 08/18/1998 | US5794693 Dual tubing string hanging apparatus |
| 08/18/1998 | CA2094793C Downhole tool apparatus with non-metallic components and methods of drilling thereof |
| 08/18/1998 | CA2036376C Apparatus for recovering a wellhead |
| 08/18/1998 | CA2027211C Casing circulator and method |
| 08/13/1998 | WO1998035131A2 Tool and method for removing excess cement from the top of a liner after hanging and cementing thereof |
| 08/13/1998 | WO1998035130A1 Device by a retrievable bridge plug |
| 08/13/1998 | WO1998035129A1 A seal for a longitudinally movable drillstring component |
| 08/13/1998 | CA2279374A1 Device by a retrievable bridge plug |
| 08/12/1998 | EP0857854A2 Apparatus with a nipple for use in a well |
| 08/12/1998 | EP0857248A1 Completion assembly for wellbores |
| 08/12/1998 | EP0857247A1 Assembly and process for drilling and completing multiple wells |
| 08/11/1998 | US5791657 Seals containing composite non-extrusion springs |
| 08/11/1998 | US5791418 Tools for shallow flow wellhead systems |
| 08/11/1998 | US5791416 Well completion device and method of cementing |
| 08/11/1998 | US5791414 Early evaluation formation testing system |
| 08/11/1998 | US5791413 Wireline-set, retrievable packer with flow control plug at the top |
| 08/11/1998 | US5791412 Pressure-boost device for downhole tools |
| 08/11/1998 | US5791411 For sealing around the cylindrical polish rod of a rotating rod string |
| 08/07/1998 | CA2215755A1 Tubing hanger |
| 08/06/1998 | WO1998034008A1 Downhole packer |
| 08/06/1998 | WO1998034005A1 Deployment system and apparatus for running bottomhole assemblies in wells, particularly applicable to coiled tubing operations |
| 08/05/1998 | EP0856636A2 Method and apparatus for testing and sampling open-hole oil and gas wells |
| 08/05/1998 | CN2287206Y Sealing and separating device for hot production |
| 08/05/1998 | CN2287205Y Sealer for hot production |
| 08/04/1998 | US5788781 Contacting with mixture of surfactants having specified hydrophilic-lipophilic balance in nonpolar diluent oil, rinsing with water |
| 08/04/1998 | US5788421 Hectorite slurry |
| 08/04/1998 | US5787987 Lateral seal and control system |
| 08/04/1998 | US5787979 Plug system for wellbore operations |
| 08/03/1998 | CA2228728A1 Frangible pressure seal |
| 07/29/1998 | EP0855491A2 Subterranean wellbore tool |
| 07/29/1998 | CN2286797Y Double-stage cement-injeftion tool |
| 07/28/1998 | US5785131 Pressurized formation sample collection |
| 07/28/1998 | US5785124 Method for accelerating production |
| 07/28/1998 | US5785121 Blowout preventer protector and method of using same during oil and gas well stimulation |
| 07/23/1998 | WO1998015712A3 Method of forming wellbores from a main wellbore |
| 07/22/1998 | EP0854267A2 Fluid circuitry for a tubing hanger |
| 07/21/1998 | US5782306 Removable packer device for isolating a segment of a well bore |
| 07/21/1998 | US5782298 For use in a well mining operation |
| 07/21/1998 | CA2222291A1 Apparatus and method for controlling hydraulic control fluid circuitry for a tubing hanger |
| 07/15/1998 | EP0853185A2 Inflation packer tool and method for well cementing |
| 07/15/1998 | EP0852657A1 Tool for blocking axial flow in gravel-packed well annulus |
| 07/15/1998 | CN2286239Y Low-voltage electric cable test wellhead blowout preventor |
| 07/14/1998 | US5780407 Includes a surfactant and a diluent oil; useful in cleaning oil-contaminated substrates |
| 07/14/1998 | US5780395 Acrylamide polymer, chromium-containing crosslinking agent, surfactant, liquid solvent, and gas; enhanced oil recovery |
| 07/14/1998 | US5778982 Fixed head inflatable packer with fully reinforced inflatable element and method of fabrication |
| 07/14/1998 | US5778981 Device for suspending a sub sea oil well riser |
| 07/14/1998 | US5778978 Exterior wireline cable adapter sub |
| 07/14/1998 | US5778918 Pilot valve with improved cage |
| 07/09/1998 | WO1998022301A3 Transmission assembly |
| 07/09/1998 | CA2226179A1 Well cement inflation packer tools and methods |
| 07/08/1998 | EP0851967A1 Single bore riser system |
| 07/08/1998 | EP0851965A2 Simplified xmas tree using sub-sea test tree |
| 07/08/1998 | CN2285819Y Supershort packer capable of clean-out of well |
| 07/08/1998 | CN1187238A Primary and secondary seal assemblies with contacting convex surfaces |
| 07/07/1998 | US5775429 For filling a space proximate to a tool surface downhole in a wellbore |
| 07/07/1998 | US5775428 Whipstock-setting apparatus |
| 07/07/1998 | US5775427 Internally latched subsea wellhead tieback connector |
| 07/07/1998 | US5775422 Tree test plug |
| 07/07/1998 | US5775421 Fluid loss device |
| 07/07/1998 | US5775420 Dual string assembly for gas wells |
| 07/07/1998 | US5775419 Wellhead leak containment device |
| 07/07/1998 | CA2197584E Wellhead assembly |
| 07/02/1998 | WO1998028518A1 Rotary stuffing box and seal assembly |
| 07/02/1998 | DE19700974A1 Adaptor to fill hollow spaces for ditchless laying of pipe conduits in ground |
| 07/01/1998 | EP0851093A2 Subsurface apparatus and method for releasing a cementing plug |
| 07/01/1998 | CN2285370Y Automatic cement-throwing device for grout off operation |
| 07/01/1998 | CN2285369Y Composite potable blowing-prevention box for oil-producing well |
| 06/30/1998 | US5771931 High pressure wear resistant pilot valve |
| 06/30/1998 | US5771927 Undersea hydraulic connector with equalization channel |
| 06/25/1998 | WO1998027313A1 Apparatus for and method of assembling a rotary blowout preventer |
| 06/24/1998 | EP0848784A1 Expandable retrievable bridge plug |
| 06/24/1998 | CN2284858Y Flushing packer |
| 06/24/1998 | CN2284856Y Side-drilling tool with well shutting-in function |
| 06/24/1998 | CN1185515A Side drilling tool with well enclosing function |
| 06/23/1998 | US5769162 Dual bore annulus access valve |
| 06/18/1998 | WO1998026155A1 Blowout preventer control system |
| 06/16/1998 | US5767400 Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions |
| 06/16/1998 | US5765834 Sealing device |
| 06/16/1998 | US5765813 Wellhead production blowout preventer ram |
| 06/16/1998 | US5765641 Positionable in a subterranean well |
| 06/16/1998 | US5765639 From an oil bearing formation penetrated by a well |
| 06/16/1998 | US5765637 Multiple test cased hole formation tester with in-line perforation, sampling and hole resealing means |
| 06/16/1998 | CA2096068C Retrievable well packer |
| 06/11/1998 | WO1998025004A1 Apparatus for launching at least one plug into a tubular in a wellbore |
| 06/11/1998 | WO1998025003A1 Single riser with two wellheads |
| 06/11/1998 | WO1998009053A3 Method and apparatus for sealing a junction on a multilateral well |
| 06/11/1998 | CA2273101A1 Single riser with two wellheads |
| 06/10/1998 | EP0846839A2 Method and apparatus for placing and cementing casing in horizontal wells |
| 06/10/1998 | EP0846218A1 Downhole apparatus |
| 06/10/1998 | CN2283723Y Wellhead cover |
| 06/09/1998 | US5762143 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 06/09/1998 | US5762142 Coiled tubing apparatus |
| 06/09/1998 | US5762139 Subsurface release cementing plug apparatus and methods |
| 06/09/1998 | US5762135 Underground well electrical cable transition, seal and method |
| 06/09/1998 | US5762106 Undersea hydraulic coupling and metal seal |
| 06/09/1998 | CA2110638C Expansion foam borehole plug and method |
| 06/04/1998 | WO1998023846A1 System, vessel, seabed installation and method for producing oil or gas |
| 06/03/1998 | EP0845577A1 Wellhead assembly |
| 06/03/1998 | CN2283126Y Blow-out preventing lock valve |