Alert 99 – 33 More on Mismatched Hammer Unions

Alert 99 – 33 More on Mismatched Hammer Unions

WHAT HAPPENED:

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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