PDC Bit

1. The Hole Preparation

①Make sure the hole is clean.

②If necessary,make a clean-up trip by the prior bit with a junk basket.

2. The Bit Preparation

①Transport bit in box to rig floor to avoid cutter damage.

②Remove bit from the box to wooden or rubber floor carefully.

③Inspect bit for damage.

④Record bit series No and model information.

⑤Check inside of bit and make sure it clear.

3. Making Up The Bit

①Fit breaker to bit and engage latch.

②Clean and grease pin.

③Lower drilling string to top of pin and engage threads.

④Locate bit and breaker in rotary table and make up to recommended torque.

4. Tripping in the Hole

①Remove breaker and lower bit through rotary table carefully.

②Trip carefully through BOPs,casing shoes and liner hangers.

③Trip slowly through ledges,dog legs and other tight sports.

④Wash last three joints to bottom with full flow at 50-60RPM.

⑤Tag bottom gently and pick up 6-12 inches off bottom.

⑥Circulate 5-10 minutes with full flow at 50-60 RPM.

5. Reaming

①Avoid small well reaming in long well sections.

②Reaming at tight spots with full flow to ensure sufficient cooling of the cutting teeth.

③Reaming with WOB of 2000-4000 pound and rotary of 50-60 RPM.

④Reaming slowly,avoid high torque.

6. Bit Break In

①Lower bit to bottom with full flow at 50-60 RPM.

②Compare expected and actual hydraulics.

③Record stand pipe pressure and pump strokes.

④After three feet,increase weight at 2000 pound and increase rotary to 100-200 RPM.

7. Drilling In

①Determine optimum drilling parameters by changing WOB and RPM with recommended guidance.

②If torque or RPM cycling is severe,control with higher WOB or increasing RPM.

③In harder formations RPM should be reduced to maintain smooth torque and reduce cutter temperature.

8. Make Connection

①After making connection,lower to bottom slowly with full flow and 50-60 RPM.

②Check stand pipe pressure and pump strokes on and off bottom.

③Increase RPM to previous level and add WOB slowly.