Steerable Systems

Steerable Systems

Deviated wells are normally drilled using a steerable system which is a combination of bent sub, motor and MWD allowing both rotary drilling and sliding without tripping for directional changes.

Bottom Hole Assembly

Generally the BHA shall comprise:

  • tri-cone bit / PBC bits
  • straight housing motor (low torque)
  • bent sub
  • non-magnetic drill collar
  • drill collars (as required for WOB at inclination)
  • drilling jar
  • HWDP.

Provisional bottomhole assemblies are generally recommended by the Directional Drilling Contractor as . . .

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