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| Number | Title | Issue Date |
| 5229091 | Process for desulfurizing Claus tail-gas A process is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides. Oxidized tail-gas is directed into an absorber where a solid absorbent... | 07/20/1993 |
| 5228510 | Method for enhancement of sequential hydraulic fracturing using control pulse fracturing A method for fracturing a subterranean formation containing desired natural resources in which controlled pulse fracturing (CPF) is combined with hydraulic fracturing in a second wellbore along with hydraulic fracturing in a first wellbore. Multiple radia... | 07/20/1993 |
| 5224541 | Use of profile control agents to enhance water disposal A method for the disposal of waste water in a formation having varying permeability zones therein where a higher permeability zone is first closed to fluid flow via a solidifiable gellable mixture. This mixture forms a solid gel in the higher permeability... | 07/06/1993 |
| 5222557 | Sand control agent and process A method for forming a gravel pack in a washed-out interval is provided where a borehole penetrates an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole. After perforatin... | 06/29/1993 |
| 5222556 | Acidizing method for gravel packing wells A method for gravel packing perforations in a wellbore where an acid is directed into the perforations so as to dissolve formation fines in channels contained in said perforations. The acid is of a strength sufficient to dissolve said fines. After the fin... | 06/29/1993 |
| 5219026 | Acidizing method for gravel packing wells A method for gravel packing perforations in a wellbore where an acid is directed into the perforations so as to dissolve formation fines in channels contained in said perforations. The acid is of a strength sufficient to dissolve said fines. After the fin... | 06/15/1993 |
| 5215149 | Single horizontal well conduction assisted steam drive process for removing viscous hydrocarbonaceous fluids A conduction assisted steam flooding process is described where heavy oil is recovered from reservoirs with limited native injectivity and a high water saturated bottom zone. A horizontal well is placed above the water saturated zone. This well is perfora... | 06/01/1993 |
| 5215147 | Method for selectively closing an intermediate zone of a near wellbore area A method for selectively closing an intermediate zone of a near wellbore area in a formation. Initially, a drillable mechanical packer is placed into the wellbore below the intermediate zone. The wellbore area adjacent to the intermediate zone is cooled t... | 06/01/1993 |
| 5214384 | Method including electrical self potential measurements for detecting multiphase flow in a cased hole A method for time lapse electric logging in a cased hole in which electrodes are implanted in the casing or the hole is completed with a gravel packed non conductive, perforated liner that allows an open hole logging tool to be used for time-lapse logging... | 05/25/1993 |
| 5211236 | Sand control agent and process A method for forming a consolidated gravel pack in a washed-out interval is provided where a borehole penetrates an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole. Aft... | 05/18/1993 |
| 5211235 | Sand control agent and process A method for forming a gravel pack in a washed-out interval is provided where a borehole penetrates an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole. After perforatin... | 05/18/1993 |
| 5211233 | Consolidation agent and method A sand consolidating method is provided for use in a borehole within an unconsolidated or loosely consolidated oil or gas reservoir which is likely to introduce substantial amounts of sand into the borehole and cause caving. After perforating the borehole... | 05/18/1993 |
| 5211232 | In-situ silica cementation for profile control during steam injection A method for controlling the profile of a formation where temperatures higher than 200° F. are encountered. Initially, an aqueous solution of an alkali metal hydroxide, ammonium hydroxide or organoammonium hydroxide is injected into a zone of greater per... | 05/18/1993 |
| 5211231 | In-situ cementation for profile control A method and composition for controlling the profile of a formation where temperatures higher than 200° F. are encountered. An aqueous solution of an organoammonium silicate, alkali metal or ammonium silicate is injected into a zone of higher permeabilit... | 05/18/1993 |
| 5209296 | Acidizing method for gravel packing wells A method for producing substantially sand or fines free hydrocarbonaceous fluids from a wellbore which is initially gravel packed. Thereafter, an acid is directed into the wellbore so as to dissolve formation fines in channels contained in perforations co... | 05/11/1993 |
| 5207778 | Method of matrix acidizing This invention is directed to a method to improve matrix acidizing of a carbonate containing formation by taking advantage of wormholes which are created during acidizing. The wormholes are closed with a solidifiable gel which protects them from entry of ... | 05/04/1993 |
| 5207271 | Foam/steam injection into a horizontal wellbore for multiple fracture creation A foam/steam injection method for forming fractures is a for reservoir penetrated by a horizontal wellbore. Steam is injected into said wellbore at a pressure sufficient to fracture the formation. Water which is used to make the steam contains a foamable ... | 05/04/1993 |
