Referring to the drawings, wherein like reference characters designate corresponding parts throughout the several figures, and particularly to FIGS 1A and 1B, there is shown {HEAD ~ an oil field drill pipe}, indicated by the reference character 10, comprising {TAIL ~ an elongated hollow tubular pipe portion} 11 having a male coupling end 12 and a female coupling end 13 
comprising
Referring to the drawings , wherein like reference characters designate corresponding parts throughout the several figures , and particularly to FIGS 1A and 1B , there is shown { HEAD ~ an oil field drill pipe } , indicated by the reference character 10 , comprising { TAIL ~ an elongated hollow tubular pipe portion } 11 having a male coupling end 12 and a female coupling end 13
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