Digital oilfield is the main means to increase production and income. Developing ultra-short radius sidetracking horizontal wells in old requires high-performance well trajectory control. In this paper, flexible drill pipe designed by bionics principle, logging tool monitor borehole real time using gamma ray technology. The combination of can realize remaining oil recovery between dense pattern...

Arc-shaped forceps are important in pharyngeal cancer surgery, endoscopic sinus surgery, and single port surgery. Rotating the gripper of an arc-shaped forceps with respect to its shaft axis can improve the manipulability of the forceps. Concentric pipe structures consisting of inner and outer pipes are often used for this purpose. The inner pipe transmits rotations from its proximal end to dis...

The functioning of the first type, the flue or labial pipe, was already investigated within previous extensive research projects. The second pipe type, the reed pipe, is less often installed in pipe organs, and only little research was done in this field so far. This is why this pipe type is now the focus of research of the working group ‚Musical Acoustics ‘ at the Fraunhofer Institute for Buil...

The Navy and Marine Corps provide the Nation with a flexible and joint instrument of security policy with which to promote stability, project maritime power landward, and exercise American sovereignty abroad. Naval forces shape the global security environment; help assure access to regions of vital interest; and permit timely, and frequently, the initial crisis response from the sea. The abilit...

The long term goal of this research is twofold: (1) develop an advanced multi-physics model with a multi-numerical solution techniques approach to predict nonlinear dynamic behavior of impact burial and flow-induced motion of flexible structures (mines) and surrounding sediments (sand) in the marine environment; and (2) calibrate resulting models with experimental and field measurements. The pr...