Powered Rotary Steerable System Technology

Successful New Technology Introduction and Applications of Rotary Steerable System

The change from steerable motor to rotary steerable system has been both technically and commercially successful in Lybia. Through these case histories the paper will demonstrate benefits resulting from the use of rotary steerable systems that have led to a step change in overall drilling performance in the Middle East. This paper describes the successful introduction and application of a rotar...

افزایش کنترل دقیقTVD در حفاری افقی به وسیله Rotary Steerable System RSS در میدان نفتی فروزان

Rotary Steerable Directional Drilling Stick/Slip Mitigation Control

This paper details the online-identification-based adaptive design of a stick/slip minimization algorithm and top-drive servo control for Rotary Steerable System (RSS) directional drilling tools. Stick/slip in this context refers to the downhole angular velocity variation of the bit about a nominal value. The basic pole placement controller designs are SISO linear but recursively evaluated base...

Control of a Rotary Steerable System Directional Drilling Tool Roll­stabilised Control Unit

A directional drilling tool control unit whose design is based on servo control of a rotary valve using the roll-stabilised instrumented system approach has been successfully used in oil fields for over twenty years. In this paper, Field Oriented Control (FOC) is applied to cascaded voltage regulation and servo control using a open-loop plant model of the roll-stabilised control unit. The servo...

A Continous Rotary Actuation Mechanism for a Powered Hip Exoskeleton

Follow this and additional works at: http://scholarworks.umass.edu/masters_theses_2 Part of the Biomechanical Engineering Commons, Biomechanics and Biotransport Commons, Biomedical Devices and Instrumentation Commons, Computer-Aided Engineering and Design Commons, Controls and Control Theory Commons, Electro-Mechanical Systems Commons, Robotics Commons, and the Systems and Integrative Engineeri...