Collapsible taps have interchangeable tap heads and a common body, and will tap virtually any thread form with the appropriate chaser. Styles include: Model ALTs for straight-thread tapping, Model LLs ...
Williams Cos. Inc., Tulsa, and three other companies have spent 4 years and about $5 million to conceive and design a diverless, deepwater hot-tapping system that will undergo full-scale testing this ...
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