| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
|---|
| 11/02/1988 | EP0289108A2 Wellhead hanger and seal |
| 11/02/1988 | EP0289107A2 Wellhead seal assembly |
| 11/02/1988 | EP0289106A2 Wellhead seals |
| 11/02/1988 | EP0289105A2 Wellhead seal |
| 11/02/1988 | EP0289104A2 Annular wellhead seal |
| 11/01/1988 | US4781387 Metal to metal subsea casing hanger seal |
| 11/01/1988 | US4781249 Progressively inflated packers |
| 10/26/1988 | EP0288106A2 Foamed slurry generator |
| 10/26/1988 | EP0287735A2 Method for completing a drainhole well |
| 10/26/1988 | CN88102073A Whipstock packer assembly |
| 10/25/1988 | US4779681 Packer for oil or gas well with lateral passage therethrough and method of fracturing well |
| 10/25/1988 | CA1243600A1 Wellhead connector |
| 10/25/1988 | CA1243599A1 Well apparatus |
| 10/25/1988 | CA1243584A1 Coded fluid control system |
| 10/25/1988 | CA1243481A1 Cement slurry compositions for cementing oil wells, adapted to control free water and corresponding cementing process |
| 10/19/1988 | CN88101275A Seal system |
| 10/18/1988 | US4778528 Cement slurry compositions for cementing oil wells, adapted to control free water and corresponding cementing process |
| 10/12/1988 | CN87216818U Bridging plug of cement block |
| 10/12/1988 | CN87212267U Connector of the drilling |
| 10/12/1988 | CN86206266U Multifunctional blockage |
| 10/11/1988 | US4776409 Insitu waste impoundment treating apparatus and method of using same |
| 10/11/1988 | US4776396 Apparatus for controlling inflation fluid to and from inflatable packer elements |
| 10/11/1988 | US4776395 Well bore treating fluid tool |
| 10/11/1988 | CA1242971A1 Method and means for storing a marine riser |
| 10/05/1988 | CN86209087U Self open and close spilling-proof device of pot cover |
| 10/05/1988 | CN86208780U Drillable bridge chocke plug |
| 10/04/1988 | US4775009 Process and device for installing seismic sensors inside a petroleum production well |
| 10/04/1988 | US4775008 Adjustable cement head manifold |
| 10/04/1988 | CA1242847A1 Expandable polymer concrete |
| 10/04/1988 | CA1242641A1 Casing hanger and packoff apparatus |
| 10/04/1988 | CA1242576A1 Method of recovering hydrocarbons from an underground formation |
| 09/28/1988 | CN87205499U Kelly bar rotating short-knot with antispray rotary plug |
| 09/27/1988 | USRE32755 Accelerated downhole pressure testing |
| 09/27/1988 | US4773478 Hydraulic setting tool |
| 09/27/1988 | CA1242472A1 Annular seal with v-cut |
| 09/27/1988 | CA1242390A1 Connector latch with reduced stresses |
| 09/20/1988 | US4772158 Method and apparatus for setting inflatable packers in deep water |
| 09/20/1988 | US4771832 Wellhead with eccentric casing seal ring |
| 09/20/1988 | US4771828 Wellhead seals |
| 09/20/1988 | CA1242140A1 Subsea wellhead structure |
| 09/20/1988 | CA1242071A1 Process and composition for cementing wells passing through salt formations |
| 09/14/1988 | EP0203172B1 Non-return valve for bore hole sleeves |
| 09/14/1988 | CN87105977A Method for treatmenting underground structural layer with coiler selectively |
| 09/13/1988 | US4770426 Sealing structure for the upper end of a rising or conveying pipeline |
| 09/13/1988 | US4770387 Variable ram seal for blowout preventers |
| 09/13/1988 | US4770257 Method of preventing loss of drilling mud during boring a hole in the ground |
| 09/13/1988 | US4770250 Hydraulically actuated lock pin for well pipe hanger |
| 09/13/1988 | US4770249 Method and appparatus for reduction of well assembly time |
| 09/13/1988 | US4770248 Device to orient electrical connectors in a subsea well |
| 09/13/1988 | US4770247 Subsea riser for multiple bore wells |
| 09/13/1988 | CA1242047A1 Rubber article having oil resistance and resistance to deterioration |
| 09/13/1988 | CA1241915A1 Device for connecting and disconnecting a movable tubular conduit inside a fixed tubular conduit |
| 09/13/1988 | CA1241847A1 Grouting method-chemical method |
| 09/06/1988 | US4768593 Method for primary cementing a well using a drilling mud composition which may be converted to cement upon irradiation |
| 09/06/1988 | US4768590 For sealing across downhole conduits |
| 09/06/1988 | US4768538 Radial seal hydraulic coupler |
| 08/31/1988 | CN87105805A Method and apparatus for multi-stage cementing of well casing |
| 08/30/1988 | US4766956 Wellhead annular seal |
| 08/25/1988 | DE3716133C1 Paper borehole plug |
| 08/25/1988 | DE3704969A1 Borehole closure with retaining lamellae |
| 08/23/1988 | US4765405 Oil well casing perforation cleaning tool |
| 08/23/1988 | US4765404 Whipstock packer assembly |
| 08/23/1988 | CA1240921A1 Diverter/bop system and method for a bottom supported offshore drilling rig |
| 08/17/1988 | CN87215070U Slip packer under well |
| 08/17/1988 | CN87215056U Packer cabable of flushing borehole |
| 08/16/1988 | US4763728 Jet-type well screen cleaner |
| 08/10/1988 | EP0277840A2 Modular near-surface completion system |
| 08/10/1988 | CN88100528A Releasing installation of bridge plug device and ash dumping barrel |
| 08/10/1988 | CN87107859A Packing seal for boreholes |
| 08/09/1988 | US4762180 Modular near-surface completion system |
| 08/03/1988 | CN87215084U Compression type small diameter sealing isolator |
| 08/02/1988 | US4760882 Crosslinking polymer |
| 08/02/1988 | US4760880 Combination anchor |
| 08/02/1988 | CA1239869A1 Groundwater monitoring system |
| 07/27/1988 | EP0275612A1 Well packer inflation system and method of inflating same |
| 07/27/1988 | EP0275304A1 Calcium-free clear high density fluids. |
| 07/26/1988 | US4759469 Apparatus and method for injecting balls into a well |
| 07/26/1988 | US4759409 Subsea wellhead seal assembly |
| 07/26/1988 | US4759408 Method of shutting off a portion of a producing zone in a hydrocarbon producing well |
| 07/21/1988 | DE3700717A1 Borehole plug with pressure-restrained ring expanding element |
| 07/20/1988 | EP0131618B1 Vent line system |
| 07/19/1988 | US4757860 Wellhead equipment |
| 07/19/1988 | US4757641 Decorative device for camouflaging a well casing |
| 07/13/1988 | EP0274162A2 Adjustable cement head manifold |
| 07/13/1988 | EP0274139A1 Process for selectively treating a subterranean formation using coiled tubing without affecting or being affected by the two adjacent zones |
| 07/12/1988 | US4757314 Apparatus for the control and monitoring of a well head submerged in a liquid |
| 07/12/1988 | US4756365 For use in a cased wellbore |
| 07/12/1988 | US4756364 Packer bypass |
| 07/12/1988 | CA1239091A1 Blowout preventer valve and bop stack |
| 07/12/1988 | CA1239090A1 Subsea bop stack control system |
| 07/06/1988 | EP0273471A1 Aqueous composition for universal spacer and its use in the field of drilling wells notably oil and gas wells |
| 07/05/1988 | US4755943 Communications system between a station on the surface of a liquid medium and submerged control and monitoring means of a group of submerged well head valves |
| 07/05/1988 | US4754820 Drilling head with bayonet coupling |
| 07/05/1988 | US4754814 Well packer with internally adjustable shear release mechanism |
| 07/05/1988 | US4754813 Tree capless cone seal manifold |
| 07/05/1988 | US4754812 Dual string packer method and apparatus |
| 07/05/1988 | US4754811 Controlled retracting gasifying agent injection point process for UCG sites |
| 07/05/1988 | US4754810 Method for patching casing leaks |
| 07/05/1988 | US4754705 Mechanical stemming construction for blast holes and method of use |
| 06/29/1988 | EP0272770A2 Tubular connector |