Reference Tools

Dilution versus Displacement

This dilution calculator enables the user to determine volumes of dilution and/or displacement of the mud system to reach a desired % by volume solids and/or mud density (ppg).

Two resulting modes are illustrated -
     1) Volumes of dilution and displacement to maintain a given system volume,
     2) Volume of dilution with zero displacement resulting in a total system volume

Dilution versus Displacement


Solids Removal System Performance - API RP 13C (ISO 13501)

This calculator is designed to determine a quick and effective method for determining the performance of a rig's solids removal system according to the API RP 13C specifications.

Solids Removal System Performance - API RP 13C (ISO 13501)


Dilution Cost Calculator

This calculator utilizes user-input data to determine a drilling rig's current total mud dilution cost associated with mud costs and solids removal efficiencies.

By entering a second data set and performing a comparative analysis, this calculator will determine if upgrading a rig's solids control system is justified based on the projected increase in solids removal efficiency and the subsequent decrease in total dilution costs.

Dilution Cost Calculator


Retort Solids Analysis

The retort solids analysis can be used to determine the volume percent of Liquid and Solids found in a particular mud system and/or a particular phase of solids removal equipment.

Results shall detail volume % oil, volume % corrected salt water, average specific gravity of total solids, volume % Low Gravity solids and volume % High Gravity solids.

Note: Resulting volume % Low Gravity solids is not corrected for the MBT of a water base drilling fluid.

Retort Solids Analysis



Flowrate Calculator


This screen selector calculator is designed to offer a quick and easy method for determining the proper model(s) and API screen size(s) of Derrick® brand screens for various drilling applications

Flowrate Calculator


9 Line Response Matrix


The following items are checks that you can do at your level to help you resolve screen related issues, or to help gather additional information for your Technical Services Department. Please call Technical Services for any issues that you cannot resolve at your level, or should you have any questions.

9 Line Response Matrix