- Cypress, TX, USA
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Junk Subs The DHOT Junk Sub an accessory tool used in milling or drilling operations. It is designed to prevent cuttings that are too heavy to be circulated from settling to the bottom of the hole. The standard junk sub is a welded assembly with a 10 inch deep cup. Long and extra long baskets are available; these provide a 20 or 30 inch deep cup. Junk Subs are manufactured from 4140HT or 4145M alloy steel. When ordering, please specify: Hole Size or Desired Cup OD API connection size (ex. 4-1/2" API REG pin up x 4-1/2" API REG box down) Length of cup: 10", 20" or 30"
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