Alert 99 – 33 More on Mismatched Hammer Unions

Alert 99 – 33 More on Mismatched Hammer Unions


Representatives from operators, drilling contractors, service companies, suppliers, and manufacturers held an industry wide meeting in Houston in November 1999 to continue discussions on ways to eliminate and/or control the mismatched hammer union hazard (see IADC Safety Alert 98-01). A quick and universal engineering solution appears elusive.

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