Figure F5. Procedure for probe penetration. Drill string pushes the probe into the formation. After penetration, the drill string is raised and the colleted delivery system telescopes to decouple the drill string from the tool. The probe stays in the formation to monitor the temperature and pressure. A good measurement is indicated by an abrupt increase in pressure and temperature during penetration and then a slow dissipation of pressure and temperature as the tool stays in the formation.
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