An embodiment of a well bore servicing apparatus includes a housing having a through bore and at least one high pressure fluid aperture in the housing, the fluid aperture being in fluid communication with the through bore to provide a high pressure fluid stream to the well bore, and a removable member...http://www.google.de/patents/US7963331?utm_source=gb-gplus-sharePatent US7963331 - Method and apparatus for isolating a jet forming aperture in a well bore servicing tool
