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- W2065720447 abstract "Abstract This paper describes how improved performance was achieved drilling large diameter surface holes through hard formations prone to severe loss of circulation. The paper is based on field experience in Yemen. Modified hammer bit designs and powerful construction-industry hammers were used to significantly increase penetration rates. High rates of penetration demanded an effective cuttings removal medium. A polymer-enhanced foam system was chosen for this purpose, and it successfully cleaned cuttings from the hole at the highest rates of penetration. By changing foam properties, air injection rate, bit design, hammer size and the depth at which the hammer drilling assembly was replaced with a rotary drilling assembly, the time required to drill surface holes was reduced by 65%." @default.
- W2065720447 created "2016-06-24" @default.
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- W2065720447 date "1993-02-22" @default.
- W2065720447 modified "2023-09-27" @default.
- W2065720447 title "How Surface Hole Drilling Performance Was Improved 65%" @default.
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- W2065720447 doi "https://doi.org/10.2118/25766-ms" @default.
- W2065720447 hasPublicationYear "1993" @default.
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