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Individual
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Individual
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Priority to ES0210788ApriorityCriticalpatent/ES210788A3/es
Publication of ES210788A3publicationCriticalpatent/ES210788A3/es
Automatic Analysis And Handling Materials Therefor
(AREA)
Abstract
Nuevo sistema de válvulas de cabeza para pozos da tubo caracterizado porque se halla constituído por un codo superior una válvula que se enrosca sobre la boca o parte superior del pozo una segunda válvula flexible y de un contrapeso para la válvula flexible.
ES0210788A1953-08-071953-08-07UN NUEVO SISTEMA DE VáLVULAS DE CABEZA PARA POZOS DE TUBO
ExpiredES210788A3
(es)