NPT — non-productive time — is time where the operation pays for the rig without drilling. Logistics is rarely the main cause of NPT, but it is often the cheapest to improve.

What NPT actually costs

Rig day rates mean waiting time dominates the arithmetic. When an operation stops because a component is not on board, the delay costs more than almost any freight decision that could have prevented it.

That inverts normal logistics economics: the cheapest transport is not necessarily the lowest cost.

The logistics-driven causes of NPT

  • A critical part is not on board because it was ordered after the last sailing.
  • Cargo rejected at the quay for missing certification or incorrectly marked weight.
  • Wrong product grade in tank, so bulk cannot be transferred.
  • Equipment held in customs.
  • Deck space occupied by backload that should already have returned.

What genuinely reduces NPT

Early visibility of demand. The sooner logistics sees an upcoming order, the greater the chance it makes a scheduled sailing rather than triggering an emergency shipment.

Fewer interfaces. Every handover between parties is a place information can drop. One coordinator holding the whole chain measurably reduces that risk.

Criticality marking. Not everything is equally urgent. When cargo is prioritised by operational consequence rather than order date, scarce capacity lands where it matters.

Measurement is a precondition

Without logging deviations and their causes, NPT discussions stay anecdotal. A simple, consistent deviation register — what was delayed, why, and what the consequence was — provides the basis for prioritising improvements.

Frequently asked questions

What does NPT mean?

Non-productive time — time in which the rig is not performing productive work but still incurs cost.

Is logistics the main cause of NPT?

Usually not. Technical issues and weather dominate. But logistics-related NPT is often the category most easily reduced through better planning.

How is cargo prioritised when capacity is short?

By operational consequence: what stops the drilling if it does not arrive. That requires criticality to be agreed before the sailing, not during loading.

Need help applying this in practice?

Tell us about the operation and we'll respond with a concrete plan within one business day.

Request a quote