... in the grain boundary. So, the purpose of this work is to enhance the performance of drilling using a micro texture drill tool filled with solid lubricant. Design/methodology/approach Three different micro textures such as star shaped with 6-sharp apex, rectangular slots parallel and perpendicular to drill...

...Zhang Yi; Zhang Xiaodong; Chang Xueping; Wu Qian Purpose This paper aims to clarify the relationship between the cone bit seal failure and the down-hole drilling fluid pressure and high temperature that occur during ultra-deep well drilling. It proposes that the contact pressure distribution under...

...Jian Wu; Rong Di Han Purpose The purpose of this paper is to develop water vapour as a new cooling and lubricating technique in drilling Ti6Al4V. Water vapor is an economical and eco‐friendly coolant and lubricant. However, it is necessary to study the drilling chip deformation, forces...

... content and one with a low tellurium content. Machinability of the steel was determined by the number of holes drilled by the tool before undergoing severe deformation. The drilling test matrix was prepared using a fractional factorial design with five input variables studied at two levels (25‐1). Other...

... A summary of the parameters used in the measurements are given below: Drilling mud Yield stress Accelerated stress ramp 0,025 Pa to 5.0 Pa. Experiment repeated with a preshear of 25 Pa for 30 seconds. Viscometry Step stress ramp 0.025 Pa to 25.0...

...B. Onyekpe Laboratory investigation of the effect of carbonate contaminant on the rheological properties of drilling mud based on Bingham plastic flow model was carried out. The rheological properties investigated were yield point, plastic viscosity, initial gel strength and ten‐minute gel strength...

... © MCB UP Limited 2001 --> Cutting Drilling Special "Ventus" machine plays integral role in production of diamond drill bits for offshore use Keywords: Cutting, Drilling A specially adapted, semi-automatic "Ventus 125P" abrasive blasting machine designed...

... © MCB UP Limited 2001 --> Pumps Drilling Waste Mono Pumps at the cutting edge of drill waste management Keywords: Pumps, Drilling, Waste Oil and gas operators around the world are striving to meet ever toughening emissions control legislation. Mono Pumps, part...