Pretest pressure sampling while drilling -FPWD-

At certain stage of drilling and at the zone of interest, the drilling stops and hole cleaning process takes place to have a safe sampling operation. A full structured procedure will be done to have formation pressure reading by deploying a probe that seal the borehole and suck the fluid at various speed. Date is collected recorded in memory and sent to the surface.

As QA/QC checks we need to pay attention to those points.

• The down hole gauges calibration.
  
• The probe sealing status and type.
• The battery life time.
• The tool vacuum.
• Deck tests and results.
• The rat hole to allow the probe reaching the zone of interest.
• The pipes stretch.
• Drilling hazard and well control condition (stationary time allowed)
• The mud type.
• Nearby production status SIMOP.
• Depth control system.
• Log gaps and relogging.