Accurately and promptly detecting downhole abnormalities is of great importance to ensure
safe and efficient operation of geological drilling systems. In view of the lack of abnormal …

In this paper, a DD-4D double-layer orthogonal magnetic coupler with mutual inductance
compensation is proposed for powering electrical equipment mounted on fixed sleeve …

Quantification of fluid losses at the topside is beneficial for early kick‐loss detection and
automation of the drilling operation. A model‐based estimator is a useful tool for this …

Odometry is one of most-used techniques used in mobile robotics and autonomous vehicles,
especially when the indoor navigation is required or when robot or vehicle moves inside the …

With the development of horizontal Wells and extended reach Wells in the field of oil and
gas exploitation, it is of great significance to the development of MWD which can measure …

The accurate calculation of the attitude angle of the down-hole bit is the key technology to
realize the automation and intelligence in the field of oil drilling. Therefore, in recent years …

The utilization of the adjusting device has been shown to significantly enhance the precision
and stability of the mechanical vertical drilling tool. However, the inappropriate size of the …

Early kick/loss detection is a crucial part of safe well control, and it plays a major role in the
reduction of risk and non-productive time in drilling. In conventional drilling, topside sensing …

In the forming process of galvanized sheet, the friction between the die and the blank often
causes the zinc coating of galvanized sheet to peel off, scratch, and crack. The aim of this …

Real-time estimation of the return drilling fluid during oil well drilling is investigated in this
study. Online fluid level measurements from a Venturi channel which can be placed on the …