23 WELL-DRILLING, SERVICING, AND PRODUCTION EQUIPMENT AND PARTS THEREOF-NAMELY, DERRICK RIGS, CROWN, BLOCKS, TRAVELING AND SPEED BLOCKS, CORING REELS, DRAW WORKS, KELLY DRIVES, POWER RIGS, ROTARY TABLES, TOOL SWIVELS, DRILLING MACHINES; HOISTS; WINCHES AND PULLEYS, AND PARTS THEREOF