drilling
Post on 19-Dec-2015
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DESCRIPTION
core drilling
TRANSCRIPT
1) Holding Force (Pressure)2) Relative Motion3) Debris Removal
C.F.P Cell designed to measure• Weight on Bit (WOB)• Speed of rotation (RPM)• Rate of Penetration (ROP)• Temperature raise of cutting tool
Courtesy: Compagnie Francaise des Petroles (C.F.P.), France: Forability cell (1977-79)
h = depth of cutVf = feed rateVs = cutting speedC = Surface concentration of cutting edgesw = width of cutting edge
1) Holding Force (Pressure)2) Relative Motion3) Debris Removal
PUMPS
• Rotodynamic Pump
• Positive displacement Pump
Cutting Fluids:
• Clear water
• Mud
• Polymers
Burnt BitCauses: lack of cutting fluid,
excessive WOB
Surface set bit
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