Unocal Indonesia Ltd. significantly reduced drilling time and cost by introducing a four-component drilling system in the Attaka field. The new drilling system includes use of polycrystalline-diamond-compact (PDC) bits, a low-toxicity oil-based mud (LTOBM), a measurement-while-drilling (MWD) survey tool, and a steerable positive-displacement mud motor. This paper presents a case study that shows the advantages of the new drilling system over the conventional drilling technique.

Keywords:
rop, specification, rock bit, spe drilling engineering, mwd tool, mud motor, bit selection, hole section, drilling operation, bit design
Subjects:
Bit design, Directional drilling, Drill Bits, Drilling Equipment, Drilling fluid selection and formulation (chemistry, properties), Drilling Fluids and Materials, Drilling Operations
Copyright 1989, Society of Petroleum Engineers
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