Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Annular velocity

Mean fluid velocity in the annulus in metres per second.

Slip velocity

Particle slip (settling) velocity in metres per second.

Determine the net rise velocity and transport ratio of drill cuttings from annular velocity and particle slip velocity. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Transport velocity

Net upward transport velocity of cuttings in metres per second.

Transport ratio

Transport ratio (transport velocity over annular velocity).

• Drilling and casing calculations depend on well geometry, fluid rheology and density, temperature, pressure, surge and swab, kick scenario, cement placement, wear, connection strength, transient hydraulics, and operator standards.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

• Hole Cleaning Efficiency Calculator

  Compute the annular velocity, cuttings transport velocity and hole cleaning efficiency from circulation rate, well geometry and cuttings slip velocity.

• Fault Heave Calculator

  Horizontal component of net dip slip on a fault plane: heave = dip slip * cos(dip).

• Fault Slip Calculator

  Compute net slip and the implied dip of the slip vector from the heave (horizontal) and throw (vertical) components of dip-slip displacement.