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High bending-strength ratio drill string component and drill string composed of a number of these components
High bending-strength ratio drill string component and drill string composed of a number of these components
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机译:高抗弯强度比的钻柱部件和由许多这些部件组成的钻柱
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摘要
A drill collar is disclosed having a fishing neck just behind the pin end, which has a reduced dimension compared with the box end. Hence, the tool is particularly well suited for being oriented with its pin end up in a drill string. The BSR is enhanced while the collar retains good "fishability", and "washoverability", characteristics.
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