| Patents for E21B 33 - Sealing or packing boreholes or wells (33,564) |
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| 03/10/1998 | US5725059 Method and apparatus for producing parallel boreholes |
| 03/10/1998 | US5725056 Wellhead assembly with removable bowl adapter |
| 03/10/1998 | US5725055 For use in a borehole in the earth |
| 03/05/1998 | WO1998009163A1 Method for verifying positive inflation of an inflatable element |
| 03/05/1998 | WO1998009054A1 Cement reinforced inflatable seal for a junction of a multilateral |
| 03/05/1998 | WO1998009053A2 Method and apparatus for sealing a junction on a multilateral well |
| 03/05/1998 | WO1998009052A1 Swivel |
| 03/05/1998 | WO1998009051A1 Subsea module |
| 03/05/1998 | WO1998009050A1 Subsea well |
| 03/03/1998 | US5723423 Solvent soaps and methods employing same |
| 03/03/1998 | US5722844 Wellhead junction system |
| 03/03/1998 | US5722491 Well cementing plug assemblies and methods |
| 02/28/1998 | CA2212590A1 Hydrostatically actuated packer |
| 02/26/1998 | WO1998007956A1 Rotating blowout preventor |
| 02/26/1998 | CA2263602A1 Rotating blowout preventor |
| 02/25/1998 | EP0825328A2 Apparatus for formation testing |
| 02/25/1998 | EP0824630A1 Mechanism for anchoring a well tool |
| 02/25/1998 | CN1174588A Method of creating casing in borehole |
| 02/24/1998 | US5720343 For use in a subterranean well |
| 02/19/1998 | DE19729059A1 Sealing arrangement for boreholes in rock formations with pressure burden |
| 02/18/1998 | CN1173581A Pressure index deciding method for block integral profile control for water packing-off |
| 02/17/1998 | US5718292 Inflation packer method and apparatus |
| 02/17/1998 | US5718288 Method of cementing deformable casing inside a borehole or a conduit |
| 02/17/1998 | US5718287 For injecting fluid into a wellbore |
| 02/17/1998 | CA2168090C Downhole clutch assembly |
| 02/11/1998 | EP0823537A1 Well stabilisation tool and method |
| 02/11/1998 | CN1172890A Preparing and use of liquid bridging plug |
| 02/10/1998 | US5717131 Apparatus for testing a shear thickening plugging fluid |
| 02/10/1998 | CA2183019A1 Retrievable sealing plug coil tubing suspension device |
| 02/05/1998 | WO1998004805A1 An overtrawlable protection envelope |
| 02/03/1998 | US5713581 Fibrous seal for blowout preventer |
| 01/29/1998 | CA2211228A1 Liner wiper plug apparatus and method |
| 01/28/1998 | EP0820556A2 Cementing plug |
| 01/27/1998 | US5711801 Cement compositions |
| 01/27/1998 | US5711383 Cementitious well drilling fluids and methods |
| 01/27/1998 | US5711375 Well stabilization tools and methods |
| 01/27/1998 | US5711372 Inflatable packer with port collar valving and method of setting |
| 01/26/1998 | CA2211088A1 Apparatus and method for recompleting wells with coil tubing |
| 01/22/1998 | WO1998002638A1 Apparatus and method for performing imaging and downhole operations at work site in wellbores |
| 01/22/1998 | WO1998002635A1 Method for accelerating production-c-i-p |
| 01/21/1998 | EP0819830A2 Inflation packer |
| 01/21/1998 | EP0735919B1 Solvent soaps and methods employing same |
| 01/20/1998 | US5709269 Dissolvable grip or seal arrangement |
| 01/20/1998 | US5709267 Aqueous particulate dispersion for reducing the water influx rate into a wellbore |
| 01/13/1998 | US5706897 Drilling, production, test, and oil storage caisson |
| 01/13/1998 | US5706893 For a well |
| 01/13/1998 | US5706892 Downhole tools for production well control |
| 01/07/1998 | EP0815347A1 Method for measuring of flow and flowmeter |
| 01/07/1998 | EP0815346A1 Flow meter |
| 01/07/1998 | EP0620892A4 Case cementing method and system. |
| 01/07/1998 | CN2272047Y Pumping wellhead rod packing device |
| 01/06/1998 | US5704425 For use in a multilevel borehole monitoring system |
| 01/06/1998 | US5704393 Coiled tubing apparatus |
| 01/06/1998 | CA2148575C Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms |
| 01/01/1998 | CA2207662A1 Automatic slip casing hanger with radially energized seal element |
| 12/31/1997 | WO1997049892A1 Christmas tree |
| 12/31/1997 | CA2258932A1 Christmas tree |
| 12/30/1997 | US5702109 For sealing piping in gas or oil fields |
| 12/30/1997 | US5701959 Downhole tool apparatus and method of limiting packer element extrusion |
| 12/30/1997 | US5701957 Well perforator isolation apparatus and method |
| 12/30/1997 | US5701956 Methods and compositions for reducing water production from subterranean formations |
| 12/30/1997 | US5701954 For use in a subterranean well |
| 12/30/1997 | US5701953 Well head for environmental extraction wells |
| 12/30/1997 | CA2134762C Straight bore metal-to-metal wellbore seal apparatus and method of sealing in a wellbore |
| 12/29/1997 | EP0813647A2 Universal pipe injection apparatus for wells and method |
| 12/18/1997 | WO1997047854A1 Device for giving out doses of a fluid |
| 12/18/1997 | DE19623439A1 Water sampling tube for borehole to extract samples from differing levels |
| 12/17/1997 | CN1168165A Drilling and pipe laying unit |
| 12/16/1997 | US5698799 Zone isolator module for use on a penetrometer |
| 12/16/1997 | US5697449 Apparatus and method for temporary subsurface well sealing and equipment anchoring |
| 12/16/1997 | US5697441 Selective zonal isolation of oil wells |
| 12/16/1997 | US5697439 Assembly and method for hanging elongated tubing in well bore |
| 12/16/1997 | CA2130957C Pre-formed stress rings for inflatable packers |
| 12/11/1997 | WO1997040255A3 Tubing injection systems for land and under water use |
| 12/10/1997 | EP0811747A2 Downhole tool and method for use of the same |
| 12/10/1997 | CN1036672C Method for cementing well |
| 12/09/1997 | CA2106699C Coiled tubing inflatable packer with circulating port |
| 12/04/1997 | WO1997045624A1 Well head system |
| 12/04/1997 | WO1997045623A1 System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells |
| 12/03/1997 | EP0595907B1 Improved sub-sea test tree apparatus |
| 12/03/1997 | CN2269461Y Packer for slant well and directional well |
| 12/02/1997 | US5692565 Apparatus and method for sampling an earth formation through a cased borehole |
| 12/02/1997 | US5692564 Horizontal inflation tool selective mandrel locking device |
| 11/25/1997 | US5690172 Seal-sub packer and a setting tool therefor |
| 11/19/1997 | EP0807151A1 Polymeric earth support fluid compositions and method for their use |
| 11/18/1997 | US5687795 Packer locking apparatus including a time delay apparatus for locking a packer against premature setting when entering a liner in a wellbore |
| 11/18/1997 | US5687794 Subsea wellhead apparatus |
| 11/18/1997 | US5687793 Apparatus for use in lowering a well pipe into alignment with a subsea conduit |
| 11/18/1997 | CA2026396C Optimization of cyclic steam in a reservoir with inactive bottom water |
| 11/13/1997 | WO1997028349A3 Downhole valve |
| 11/11/1997 | US5685373 Assembly and process for drilling and completing multiple wells |
| 11/11/1997 | US5685372 Temporary plug system |
| 11/11/1997 | US5685370 Dual-bore, antirotating pump assembly |
| 11/11/1997 | US5685369 Metal seal well packer |
| 11/11/1997 | US5685343 Decorative pipe tubing cover |
| 11/05/1997 | EP0804678A1 Method of creating a casing in a borehole |
| 11/04/1997 | CA2055127C Non-rotating cementing plug with molded inserts |
| 11/04/1997 | CA2030191C Arrangement and method for conducting substance and seal therefor |
| 10/30/1997 | WO1997040255A2 Tubing injection systems for land and under water use |
| 10/28/1997 | US5681059 Pipe connector |