Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells

EFIXED CONSTRUCTIONS E21Mining E21BEARTH DRILLING

E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells

E21B43/003Vibrating earth formations E21B43/006Production of coal-bed methane E21B43/01specially adapted for obtaining from underwater installations E21B43/0107Connecting of flow lines to offshore structures E21B43/0122Collecting oil or the like from a submerged leakage E21B43/013connecting a production flow line to an underwater well head E21B43/0135using a pulling cable E21B43/017Production satellite stations E21B43/02Subsoil filtering E21B43/025Consolidation of loose sand or the like round the wells without excessively decreasing the permeability thereof E21B43/04Gravelling of wells E21B43/045Crossover tools E21B43/08Screens or liners E21B43/082Screens comprising porous materials E21B43/084Screens comprising woven materials E21B43/086Screens with preformed openings E21B43/088Wire screens E21B43/10Setting of casings, screens, liners or the like in wells E21B43/101for underwater installations E21B43/103of expandable casings, screens, liners, or the like E21B43/105Expanding tools specially adapted therefor E21B43/106Couplings or joints therefor E21B43/108Expandable screens or liners E21B43/11Perforators Permeators E21B43/112Perforators with extendable perforating members E21B43/114Perforators using direct fluid action on the wall to be perforated E21B43/116Gun or shaped charge perforators E21B43/117Shaped charge perforators E21B43/118characterised by lowering in vertical position and subsequent tilting to operating position E21B43/1185Ignition systems E21B43/11852hydraulically actuated E21B43/11855mechanically actuated E21B43/11857firing indication systems E21B43/119Details E21B43/1195Replacement of drilling mud; decrease of undesirable shock waves E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells E21B43/121Lifting well fluids E21B43/122Gas lift E21B43/123Gas lift valves E21B43/124Adaptation of jet-pump systems E21B43/126Adaptations of down-hole pump systems powered by drives outside the borehole E21B43/127Adaptations of walking-beam pump systems E21B43/128Adaptation of pump systems with down-hole electric drives E21B43/129Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole E21B43/14Obtaining from a multiple-zone well E21B43/16Enhanced recovery methods for obtaining hydrocarbons E21B43/162Injecting fluid from longitudinally spaced locations in injection well E21B43/164Injecting CO2 or carbonated water E21B43/166Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium E21B43/168Injecting a gaseous medium E21B43/17Interconnecting two or more wells by fracturing or otherwise attacking the formation E21B43/18Repressuring or vacuum methods E21B43/20Displacing by water E21B43/24using heat E21B43/2401by means of electricity E21B43/2403by means of nuclear energy E21B43/2405in association with fracturing or crevice forming processes E21B43/2406Steam assisted gravity drainage [SAGD] E21B43/2408SAGD in combination with other methods E21B43/241combined with solution mining of non-hydrocarbon minerals E21B43/243Combustion in situ E21B43/247in association with fracturing processes or crevice forming processes E21B43/248using explosives E21B43/25Methods for stimulating production E21B43/255including the injection of a gaseous medium as treatment fluid into the formation E21B43/26by forming crevices or fractures E21B43/261Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation E21B43/263using explosives E21B43/2635by means of nuclear energy E21B43/267reinforcing fractures by propping E21B43/28Dissolving minerals other than hydrocarbons E21B43/281using heat E21B43/283in association with a fracturing process E21B43/285Melting minerals E21B43/29Obtaining a slurry of minerals E21B43/292using steerable or laterally extendable nozzles E21B43/295Gasification of minerals E21B43/30Specific pattern of wells E21B43/305comprising at least one inclined or horizontal well E21B43/32Preventing gas- or water- coning phenoma E21B43/34Arrangements for separating materials produced by the well E21B43/36Underwater separating arrangements E21B43/38in the well E21B43/385by reinjecting the separated materials into an earth formation in the same well E21B43/40Separation associated with re-injection of separated materials