Methods for completing wells traversing earth formations

摘要: This application discloses new and improved methods for completing wells having earth formations which are to be fractured, acidized, or treated inhibiting the production of unconsolidated formation materials. In one manner practicing present invention, a tool string is arranged suspension from pipe includes well packer coupled an elongated tubular member defining enclosed chamber substantial volume maintained at reduced pressure by normally closed valves opposite ends that adapted selectively opened in succession. then positioned cased bore set above previously perforated interval traversing treated. Once isolate thereabove, first two opened. Upon opening valve, fluids will suddenly exhausted into reduced-pressure removing contaminants may have entered following perforation casing so as leave only uncontaminated materials immediately surrounding perforations. Thereafter, second valve injecting pressured treating supporting through perforations back adjacent formations.