Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
Patents for E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
08/1998
08/04/1998US5787980 Well screen having a uniform outer diameter
08/04/1998CA2048888C Mining method and unit for small sea deposits
07/1998
07/30/1998WO1998032951A2 Method and device for driving bore-holes, especially in the sea bed, using a guide tip
07/30/1998WO1998032950A1 Method for pumping a fluid
07/30/1998CA2250101A1 Method for pumping a fluid
07/29/1998CN1188854A Electric machine commutating long stroke beam unit
07/28/1998US5785500 Well pump having a plunger in contact with well and pump fluid
07/28/1998US5785130 High density perforating gun system
07/28/1998US5785124 Method for accelerating production
07/28/1998US5785123 Apparatus and method for controlling a well plunger system
07/28/1998US5785122 Wire-wrapped well screen
07/28/1998US5785120 Tubular patch
07/23/1998WO1998031919A1 Method and apparatus for producing and shipping hydrocarbons offshore
07/23/1998WO1998031918A1 Process for stimulation of oil wells
07/23/1998WO1998015712A3 Method of forming wellbores from a main wellbore
07/23/1998CA2277109A1 Method and apparatus for producing and shipping hydrocarbons offshore
07/22/1998EP0854266A2 Method and apparatus for retrieving a rotary pump from a wellbore
07/22/1998EP0853651A1 Cleaning compositions for oil and gas wells, lines, casings, formations and equipment and methods of use
07/22/1998EP0853508A1 A method for introducing materials into a solid or semi-solid medium
07/22/1998EP0646213B1 Process and tool for laying underground collector mains for liquids and gases
07/22/1998CN2286497Y Sand control and sand retention apparatus for viscous crude well
07/21/1998US5784530 Iterated electrodes for oil wells
07/21/1998US5782608 Method and apparatus for controlling a progressing cavity well pump
07/21/1998US5782303 For opening one or more drain holes in a well bore
07/21/1998US5782302 Apparatus and method for loading fluid into subterranean formations
07/21/1998US5782299 Particle control screen assembly for a perforated pipe used in a well, a sand filter system and methods of making the same
07/16/1998WO1998030783A1 A process and a formulation to inhibit scale in oil field production
07/15/1998EP0853202A1 Joint assembly
07/15/1998EP0853186A2 Treatment of subterranean formation to control particulate flowback
07/15/1998EP0852657A1 Tool for blocking axial flow in gravel-packed well annulus
07/15/1998EP0852656A1 Method and system for the treatment of a well stream from an offshore oil field
07/15/1998EP0852655A1 Gutter for a hose for transfer of oil between two floating structures
07/15/1998EP0852653A1 Method and apparatus for selective horizontal well re-entry using retrievable diverter oriented by logging means
07/15/1998EP0852652A1 Method for isolating multi-lateral well completions while maintaining selective drainhole re-entry access
07/15/1998EP0616656B1 Processes for local ground treatment, especially testing and cleaning polluted ground
07/15/1998CN2286242Y Activated water stirrer under oil well pump
07/15/1998CN1187572A Gas lift ball gas lift production ball controlled and oil extracting method thereof
07/14/1998US5780407 Includes a surfactant and a diluent oil; useful in cleaning oil-contaminated substrates
07/14/1998US5780395 Acrylamide polymer, chromium-containing crosslinking agent, surfactant, liquid solvent, and gas; enhanced oil recovery
07/14/1998US5778979 Latch and release perforating gun connector and method
07/14/1998US5778977 Enhanced oil recovery
07/14/1998CA2226988A1 Method for vertically extending a well
07/14/1998CA2145627C Polymer enhanced foams for reducing gas coning
07/10/1998CA2194801A1 Separator and method for separating components of pressurized drilling fluid returns
07/09/1998WO1998029369A1 Method for recovering gas from hydrates
07/09/1998CA2273054A1 Method for recovering gas from hydrates
07/08/1998EP0851968A1 A method of separating production fluid from an oil well
07/08/1998EP0851843A1 Subsurface remediation method and apparatus
07/08/1998EP0608238B1 Electro-vac decontamination process
07/07/1998US5775879 For communicating energy to a multiphase effluent
07/07/1998US5775846 For use with wells located in a body of water
07/07/1998US5775426 Apparatus and method for perforating and stimulating a subterranean formation
07/07/1998US5775425 Control of fine particulate flowback in subterranean wells
07/07/1998US5775424 Process of collecting subsurface fluid samples
07/07/1998US5775421 Fluid loss device
07/02/1998WO1998028520A1 Device and method for heating a treating fluid
07/02/1998WO1998028519A1 Method of oil/gas well stimulation
07/02/1998CA2276048A1 Device and method for heating a treating fluid
07/01/1998EP0851094A2 Method of fracturing subterranean formation
07/01/1998EP0774039B1 Device and method for making a slot in an underground formation
07/01/1998CN2285371Y Detachable composite perforation fracturing device
07/01/1998CN1186149A Anti-sand filling material for oil well and water well and preparation thereof
06/1998
06/30/1998US5774816 Apparatus and method for cleaning a vessel
06/30/1998US5771976 Enhanced production rate water well system
06/30/1998US5771973 Horizontal well bore, injection of methane, propane, ethane and/or butane to mobilize the heavy oil in the formation
06/30/1998CA2122106C Well screen having a slurry flow path
06/25/1998WO1998027315A1 Method for stabilizing the gas flow in water-bearing natural gas deposits or reservoirs
06/25/1998WO1998027314A1 Method for drying out rock containing immobile formation water within the encroachment area of natural gas deposits and gas reservoirs
06/25/1998WO1998005848A3 Method and apparatus for the downhole metering and control of fluids produced from wells
06/25/1998DE19653140A1 Verfahren zur Austrocknung von immobiles Formationswasser enthaltendem Gestein im Einzugsradius von Erdgas- und Gasspeicherbohrungen Method for drying of immobile formation water containing rocks in the catchment radius of gas and gas storage wells
06/25/1998DE19653136A1 Verfahren zur Stabilisierung des Gasflusses in wasserführenden Erdgaslagerstätten und Erdgasspeichern A method for stabilizing the gas flow in water-bearing deposits of natural gas and natural gas storage
06/25/1998CA2212206A1 Borehole sucker-rid pumping plant for pumping out gas liquid mixtures
06/24/1998EP0849433A2 Downhole fluid separation unit
06/24/1998CN1038867C Temp. Controlled split-flow device valve
06/23/1998US5769569 To remove contaminants from soils located above water table
06/23/1998US5769165 Method for increasing methane recovery from a subterranean coal formation by injection of tail gas from a hydrocarbon synthesis process
06/23/1998US5769161 Polished rod for oil well pumping
06/23/1998CA2193771A1 Inclined separation tank
06/23/1998CA2154957C Dual action pumping system
06/23/1998CA2094088C Gas well treatment compositions and methods
06/23/1998CA2019163C Steam injection process for recovering heavy oil
06/18/1998WO1998026152A1 Expandable tubing
06/18/1998WO1998026151A2 Method and device for driving bore holes, specially exploring and extraction drillings in the sea bottom
06/18/1998WO1998013579A3 Oil separation and pumping systems
06/17/1998EP0847464A1 Method of effecting fluid flow in porous materials
06/17/1998EP0847300A1 Filter assembly
06/17/1998CN1185190A Connector assembly for an expandable slotted pipe
06/17/1998CN1184882A Well for storage of high pressure gas
06/16/1998US5766457 Water aeration system
06/16/1998US5766270 Contacting ore with aqueous solution containing sodium carbonate to produce feed brine, steam stripping to convert sodium bicarbonate to sodium carbonate, cooling to precipitate crystals, separating, returning mother liquors to ore deposit
06/16/1998US5765964 Combustion, pressure
06/16/1998US5765756 Abrasive slurry jetting tool and method
06/16/1998US5765642 Subterranean formation fracturing methods
06/16/1998US5765639 From an oil bearing formation penetrated by a well
06/16/1998US5765637 Multiple test cased hole formation tester with in-line perforation, sampling and hole resealing means
06/16/1998CA2105104C Methods of perforating and testing wells using coiled tubing
06/11/1998WO1998025005A1 Method and apparatus for increasing fluid recovery from a subterranean formation
06/11/1998WO1998024686A1 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
06/11/1998CA2282696A1 Method and apparatus for disconnecting and retrieving multiple risers attached to a floating vessel
06/11/1998CA2192607A1 Natural gas production optimization switching valve system
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