Due to gravity, drilling cuttings are easily accumulated in an inclined well section, ultimately forming a bed, which places the drill pipe under strong friction torque. In severe cases, this can cause dragging, stuck drills, and broken tools. Because conventional fluids difficult prevent formation of sections, method carrying with pulsed fluid improve wellbore cleanness is proposed. Experiment...

Throughout this paper, G denotes a fixed, not necessarily connected, reductive algebraic group over an algebraically closed field k. This paper is a part of a series [L9] which attempts to develop a theory of character sheaves on G. The usual convolution of class functions on a connected reductive group over a finite field makes sense also for complexes in D(G0) and then it preserves (see [Gi])...

Abstract Laser surface hardening is rapidly growing in industrial applications due to its high flexibility, accuracy, cleanness and energy efficiency. However, the experimental process optimization can be a tricky task number of involved parameters, thus suggesting for alternative approaches such as reliable numerical simulations. Conventional laser models compute achieved hardness on basis mic...

This study had as objective to evaluate the workstation of the responsible for the collection of urban garbage in relation to the factors associates with the appearance or aggravation of WMRD, as well as identifying signals and symptoms of these illnesses in the related professionals. For this, was developed a form with open and closed questions, that approached item relative to the identificat...

Herbs are commonly used in the food and pharmaceutical industries. Their vast use is connected with their antibacterial or antioxidising properties, as well as numerous pro-health properties. The aim of the presented research was assessment of the quantitative and qualitative composition of moulds which contaminate samples of dried herbs: Sage (Salvia officinalis L.), Camomile (Matricaria chamo...

With the reduction of fossil energy and increase consumption, development utilization new is an inevitable trend. Renewable has attracted attention because its cleanness abundance. However, affected by randomness intermittence renewable energy, it difficult for traditional power system to meet needs users after connected, solve consumption problem relying on alone. To address this problem, inte...

The technology of flexible cooking surfaces applied to domestic induction heating (IH) appliances offers several advantages that improve the experience users, not only because safety or cleanness, but also due fast and flexibility. These cooktops have more challenging design requirements different mains connections, efficiency requirements, electromagnetic compatibility (EMC) standards, control...

Surface-enhanced Raman spectroscopy (SERS) is one of the most powerful analytical techniques for identification molecules in microelectronics industry failure analysis protocols. In this work, dry-processed gold nanoclusters were prepared by magnetron sputtering deposition to promote enhancement signal from selected common polymers found hard disk drive as surface contamination. The optimized c...