Drilling string, threaded coupling, and rod adaptor for rotary drilling
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United States of America
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Jun 4, 2024
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app pub date -
Nov 6, 2019
filing date -
Nov 6, 2019
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Abstract
A drill string for rotary drilling of underground mining machines includes a first elongate drill string member and a second elongate drill string member. The first member has a main section and a male end, and the second member has a main section and a female end. The male and female ends each have respective threads to provide a thread coupling between the male and female ends, the thread coupling enabling the male end to be secured inside the female end such that the male and female ends overlap axially. A thread lead of the respective threads of the male and the female ends are greater than a diameter of the male end and the female end.
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