Existing method for the composition for the treatment of utilized with diagnosis and for determining toxin from shigella dysenteriae

摘要

An actuating mechanism for a tool of oil/gas well, such as a plug. It is operable mechanism under borehole pressure, is arranged and plugs in the first natural closing state for a pressure under a predetermined pressure range; Second closes state, and wherein plug is no matter pressure is locked and closed; Third opening state, by increasing pressure to predetermined pressure range and the pressure in range of one predetermined time of holding. Electronics and mechanical, dual piston, actuating mechanism is described as the method flowed using a kind of control fluid in a wellbore of plug and executes a pressure testing against plug.