Junk Basket Drilling Procedure


  1. 6.4. Junk Basket
  2. 6.4. Junk Basket
  3. This procedure is more successful in soft formations.
  4. A reverse circulation type junk basket is preferred to a forward circulation type.
  5. Use the following parameters:
  • WOB = 2 to 4t
  • Rotary = 45rpms
  • Low Pump Rate ( /2 pump rate while drilling).
  1. Core approximately 20cm. Pick up to allow the junk on the side of the basket to fall into the pilot hole, then proceed coring a further +/-50cm.
  2. Pull the junk basket out of the hole
  3. After use, careful inspection and refurbishment is necessary.
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