Douwe Johannes Runia

Title: Douwe Johannes Runia: Innovator in Tool String Systems

Introduction

Douwe Johannes Runia is a notable inventor based in Rijswijk, Netherlands. He has made significant contributions to the field of engineering, particularly in the development of methods and systems for enhancing tool string performance. With a total of 17 patents to his name, Runia's work has had a substantial impact on the industry.

Latest Patents

One of his latest patents is a "Method and system for damping vibrations in a tool string system." This invention provides a control system and method for limiting vibrations in a tool string system. The system comprises a pump connected to a rotatable tool string driven by a drive system. The control system incorporates feedback of both torque and rotational speed signals into a controller. An objective of the controller is to maintain the drive speed over torque ratio equal to the connected tool string impedance (Z). Additionally, for lower frequencies, the system aims to approach and maintain a setpoint speed as drive rotation speed. The system includes a rotational speed sensor and a torque sensor, which can be replaced by a motor torque signal already available from a variable frequency drive (VFD) for an AC motor and the current safeguarding signal for a DC motor.

Another significant patent involves "Methods for installing sensors in a borehole." This method details the installation of a sensor in a borehole drilled through underground formations. The borehole is drilled with a hollow drill string formed from a series of pipe sections connected end-to-end, with a drill bit positioned at one end of the drill string. The method includes a closure member that provides an opening between the borehole and the inside of the drill string.

Career Highlights

Throughout his career, Douwe Johannes Runia has worked with prominent companies such as Shell Oil Company and Schlumberger Technology Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field.

Collaborations

Runia has collaborated with notable individuals in his field, including Robert Nicholas Worrall and David George Livesey Smith. These collaborations have further enriched his work and expanded the scope of his inventions.

Conclusion

Douwe Johannes Runia is a distinguished inventor whose contributions to tool string systems and sensor installation methods have advanced engineering practices. His innovative spirit and dedication to his work continue to inspire future developments in