Method and system for automated adjustment of drilling mud properties
AssigneeShell Oil Company
InventorsPatricia ASTRID, Jan-Jette BLANGÉ, Svetlana Viktorovna HAGERAATS-PONOMAREVA, Timothy Engelbertus SCHUIT
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Abstract
Drilling mud properties in a mud recirculation system (13) of an oil and/or gas well drilling assembly (1) are automatically adjusted by an automated mud treating assembly (20,25) that is governed hierarchal primary and secondary optimization and control loops (30,31) that continuously keep the density, viscosity, pH and other mud properties within specifications set by a model-based tertiary optimization and control loop to ensure that the mud properties will lead to sufficient drilled cutting transport, borehole stability, drill bit hydraulics, and minimum friction torque and drag.
Claims17
A method for automated adjustment of drilling mud properties in a mud recirculation system of a rig for drilling an underground wellbore, the method comprising inducing hierarchal primary and secondary optimization and control loops to adjust injection rates of mud additives into a circulated mud stream flowing through an automated mud treating assembly, to continuously keep mud properties, comprising density, viscosity, pH and optionally other mud properties, within specifications set by a model-based tertiary optimization and control loop.
A system for automated adjustment of drilling mud properties in a mud recirculation system of a rig for drilling an underground wellbore, the system comprising hierarchal primary and secondary optimization and control loops to adjust injection rates of mud additives into a mud circulation conduit in an automated mud treating assembly, arranged to continuously keep mud properties, comprising density, viscosity, pH, within specifications set by a model-based tertiary optimization and control loop.
Dependencies are inferred from the claim text.