| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 02/14/1989 | US4804043 Using a crosslinkable mixture of partially hydrolyzed polyacrylamide, phenol, formaldehyde |
| 02/14/1989 | US4804042 Bottom hole shut-in tool |
| 02/14/1989 | US4804018 Grouted closure assembly |
| 02/07/1989 | CA1249777A1 Process for passing carbon dioxide through a cased, cemented and perforated well |
| 02/07/1989 | CA1249772A1 Drill stem testing system |
| 02/07/1989 | CA1249713A1 Set retarded cement compositions and well cementing methods |
| 02/01/1989 | EP0301808A2 Device for providing a passage for a drill string |
| 01/31/1989 | US4801159 For gas meter connection |
| 01/31/1989 | US4800753 Geomechanical probe for a drilling well |
| 01/25/1989 | CN2031441U Wellhead blowout-preventing box |
| 01/24/1989 | US4799714 Sleeve type casing head adapter |
| 01/24/1989 | US4799552 Method and apparatus for injecting radioactive tagged sand into oil and gas wells |
| 01/24/1989 | CA1249218A1 Method and apparatus for injecting well treating liquid into the bottom of a reservoir interval |
| 01/24/1989 | CA1249217A1 Well treating apparatus |
| 01/19/1989 | DE3722652A1 Process for producing cement suspension |
| 01/17/1989 | USRE32831 Apparatus for sealing a well casing |
| 01/17/1989 | US4798243 Packer with electrical conduit bypass |
| 01/17/1989 | CA1248936A1 Device for the remote actuation of an appliance associated with a duct in which an incompressible fluid circulates, particularly a device for actuating a stabilizer of a set of drill rods |
| 01/17/1989 | CA1248870A1 System for installing subsea wellhead protective silo |
| 01/17/1989 | CA1248869A1 Wellhead equipment |
| 01/17/1989 | CA1248744A1 Method of recovering hydrocarbons from an underground formation |
| 01/11/1989 | CN2030649U Mixer with eight baffles for well-fixed car in petroleum mine field |
| 01/10/1989 | US4797003 Foamed slurry generator |
| 01/10/1989 | US4796922 Subsea multiway hydraulic connector |
| 01/10/1989 | US4796707 Apparatus for setting, unsetting, and retrieving a packer or bridge plug from a subterranean well |
| 01/10/1989 | US4796698 Landing nipple and plug |
| 01/10/1989 | US4796697 Slip stream device |
| 01/10/1989 | CA1248564A1 Flow diverter seal |
| 01/10/1989 | CA1248444A1 Twin seal well packer |
| 01/03/1989 | US4795198 Connector device for an underwater pipe system |
| 01/03/1989 | US4794989 Well completion method and apparatus |
| 01/03/1989 | US4794988 Surface wellhead |
| 01/03/1989 | US4794957 Bending strain relief for hose bundle |
| 01/03/1989 | US4794791 Method and device for making measurements characterizing geological formations, in a horizontal borehole formed from an underground way |
| 01/03/1989 | CA1248213A1 Geomechanical probe for oil or gas wells |
| 01/03/1989 | CA1248018A1 Deployment system |
| 01/03/1989 | CA1248016A1 Thermal slide joint |
| 01/03/1989 | CA1248015A1 Blowout preventer for use in combination with a deep well pump |
| 12/28/1988 | EP0296788A2 Electrical conductor arrangements for pipe system |
| 12/28/1988 | EP0167610B1 Multiple piezometer and application of such a piezometer |
| 12/28/1988 | CA1247519A Production tube and its connection, facilitating the completion of an oil well |
| 12/28/1988 | CA1247352A High temperature chemical cement |
| 12/27/1988 | US4793411 Retrievable gravel packer and retrieving tool |
| 12/22/1988 | EP0275304A4 Calcium-free clear high density fluids. |
| 12/21/1988 | EP0295734A2 Polished rod stuffing box with safety valve for a beam pumped production well |
| 12/20/1988 | US4792262 Process for strengthening geological formations |
| 12/20/1988 | US4791992 Hydraulically operated and released isolation packer |
| 12/20/1988 | US4791988 Permanent anchor for use with through tubing bridge plug |
| 12/20/1988 | US4791987 Wellhead seal |
| 12/20/1988 | US4791986 Tubing hanger |
| 12/20/1988 | CA1246999A1 Retrievable straddle packer |
| 12/20/1988 | CA1246990A1 Hydraulically activated liner setting device |
| 12/20/1988 | CA1246989A1 Isolation gravel packer |
| 12/20/1988 | CA1246988A1 Method and apparatus for gravel packing a well |
| 12/14/1988 | CN87210760U Device for pour drilling mud with casing pipes |
| 12/13/1988 | US4790572 Tapered wedge packoff assembly for a casing hanger |
| 12/13/1988 | US4790379 Wellhead hanger |
| 12/13/1988 | CA1246441A1 Slip releasing apparatus |
| 12/07/1988 | EP0294252A1 Equipment for a drill string with a side entry sub and method for its use |
| 12/07/1988 | EP0294240A2 Control valve |
| 12/07/1988 | EP0293584A1 Drilling device for high pressure injection method |
| 12/07/1988 | CN87205847U Device for filling gravel inside pipe |
| 12/06/1988 | US4789029 For sealing the annulus |
| 12/06/1988 | CA1245977A1 Water soluble perforation pack |
| 12/06/1988 | CA1245976A1 Preventing fluid migration around a well casing |
| 12/06/1988 | CA1245846A1 Fluid loss control in well cement slurries |
| 12/01/1988 | DE3717024A1 Device for drilling boreholes and injecting stabilising material |
| 11/29/1988 | US4787642 X-shaped high pressure sealing structure |
| 11/29/1988 | US4787457 Method and apparatus for rotating casing string segment |
| 11/29/1988 | US4787452 Injection of aqueous saline slurry incrementally |
| 11/29/1988 | US4787450 Gas lift process for restoring flow in depleted geothermal reservoirs |
| 11/29/1988 | US4787446 Inflatable packer and fluid flow control apparatus for wellbore operations |
| 11/23/1988 | EP0292085A2 Tubular connector |
| 11/23/1988 | EP0292084A2 Production tieback connector |
| 11/23/1988 | EP0291926A1 Borehole closure plug |
| 11/23/1988 | EP0291925A1 Borehole closure plug |
| 11/22/1988 | US4786805 Reusable radioactive material shipping container including cartridge and injector |
| 11/22/1988 | US4785885 Method and apparatus for cementing a production conduit within an underground arcuate bore |
| 11/22/1988 | US4785881 Plastic well with plastic well adapter |
| 11/22/1988 | US4785880 Apparatus for dispensing chemicals into oil and gas wells |
| 11/22/1988 | CA1245152A1 Retrievable exploration guide base/completion guide base system |
| 11/17/1988 | WO1988008917A1 Blowout preventer |
| 11/17/1988 | WO1988008916A1 Restriction subs for setting cement plugs in wells |
| 11/17/1988 | EP0291193A1 Method for cementing a production conduit within an underground arcuate bore |
| 11/17/1988 | EP0291143A2 Subsea riser for multiple bore wells |
| 11/15/1988 | US4784226 Drillable bridge plug |
| 11/15/1988 | US4784225 Well valve assembly method and apparatus |
| 11/15/1988 | US4784224 Casing guide for well template |
| 11/15/1988 | US4784223 Packing pellets injected as slurries |
| 11/15/1988 | US4784222 Wellhead sealing assembly |
| 11/15/1988 | CA1244756A1 Subsea hydraulic coupling |
| 11/09/1988 | EP0290250A2 Method and apparatus for deepwater drilling |
| 11/09/1988 | EP0290114A2 Tubing packer |
| 11/09/1988 | EP0290113A2 Wellhead annular seal |
| 11/09/1988 | EP0290112A2 Subsea wellhead seal assembly |
| 11/09/1988 | CN88201275U Releasing device of blocking device and cement dumping bucket |
| 11/08/1988 | US4783084 Head for a rotating blowout preventor |
| 11/08/1988 | US4782896 Retrievable fluid flow control nozzle system for wells |
| 11/08/1988 | US4782894 Cementing plug container with remote control system |
| 11/08/1988 | CA1244342A1 Stage cementing apparatus |