Abstract: An environmentally friendly insect eradication method and apparatus for removing invasive insects from tunnels bored through and within trees and other similarly composed structures by providing a canister containing a pressurized, non-flammable, non-ozone depleting fluorocarbon propellent disposed therein with the propellent having a pre-use internal pressure in the approximate range of about 75 psig to 150 psig and where the pressure is sufficient to introduce some or all of the propellent into the internal portion of an insect tunnel bored in an invaded structure. A gas introduction nozzle is inserted into an entrance or exiting insect bore in such a manner so as to cause a valve mechanism, in operative communication with the nozzle and cannister to be displaced and allow the propellent to exit the canister and enter the internal portion of the invaded insect bore to displace or otherwise eradicate the insect.

Abstract: An apparatus for maintaining a continuous supply of air pressure downhole during a well bore drilling operation, even during the addition of a pipe section to the drill string, and comprising a housing installed at the surface of the well at the position of the drilling equipment wherein the upper end of the drill string is separated from the drive mechanism in order that a new piece of drill pipe may be added to the drill string, a flapper or closure member pivotally secured within the housing normally held in an open position by the outer periphery of the drill string and spring urged in a direction toward the open end of the sleeve through which the drive mechanism passes when the drive mechanism has been backed off or removed for the addition of a section of pipe to the drill string, and a by-pass line in communication with the interior of the housing for directing air pressure from the air supply to the housing when the flapper member is in the closed position whereby the air pressure may be circulated d