Oil-drilling companies rely on long stretches of steel piping, which are known as 'strings', to reach down deep into oil wells. These individual strings are joined together (thus extending their reach) by robust, heavy-duty couplings that feature high-precision, performance-critical internal thread forms. Coupling threading has traditionally entailed multiple-pass push threading with right-hand tooling systems. This process of generating internal threads is inefficient, in large part due to the process's inefficient handling of chips and resultant long cycle times.
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