ABSTRACT

An innovative fully-automated Lubricity Evaluation Monitor incorporating new technology (LEM-NT) has been developed to study the lubricity of fluid systems, additives and their suitability for specific applications. The device was primarily developed to provide easily obtained, repeatable lubricity comparisons on both casing and formation simulated wellbores using a minimum volume of fluid. The LEM-NT evaluates relative lubricity by measuring the friction coefficient between a rotating bob and a side-loaded, simulated wellbore immersed in the fluid of interest. Torque is measured by a noncontact rotational torque meter and fluid is circulated around the bob and sample. Computer-controlled, pneumatically-applied side loads are periodically relieved to allow fluid refreshment between the formation and the fluid on the bob. Measurements are quick, inexpensive, and repeatable, requiring a minimum volume of fluid to perform each test. This paper will provide operational details of the LEM-NT and lubricant-additives test results.

Keywords:
drilling fluid property, concentration, drilling fluid management & disposal, torque, simulated wellbore, friction, drilling fluids and materials, wellbore fixture vessel, comparison density conc, circulation system
Subjects:
Drilling Fluids and Materials, Drilling fluid selection and formulation (chemistry, properties), Drilling fluid management & disposal
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2013. Offshore Mediterranean Conference
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