As the core accoutrement of directional drilling construction, measurement while (MWD) device can be divided into three types due to different data transmission methods: wired, mud pulse and electromagnetic wave. This paper used method develop a MWD for mines, working principle signal transmission, encoding structure were described. Experimental research showed that wireless had advantages long...

In the oil, gas and geothermal drilling industry, use of a drill pipe is vital for its as an addition to length depth. Another function channel high pressure mud (drilling fluid / fluid) bit. During operation, several problems were encountered, such broken, bent, leaking or wash-out pipes. This very detrimental company because time replace new will take long time, disrupt program which result i...

polyanionic cellulose polymer is used as an additive in drilling mud in order to decrease water loss and mudcake- thickness. in this study effect of bulk and nanosize polyanionic cellulose on water loss and mud-cakethickness in mud drilling is investigated. polyanionic cellulose nanoparticles are made by using of ball milling. size of nanoparticles is measured by particle size analyzer. polyani...

Abstract Rheological and filtration properties of drilling fluid contribute a vital role in successful operations. parameters such as apparent viscosity (AV), plastic (PV), yield point (YP) gel strength fluids are very essential for hydraulic calculations lifting drill cuttings during the operation. Control loss volume is also important cost effective Therefore, main goal this research to impro...

BACKGROUND High salinity and arsenic (As) concentrations in groundwater are widespread problems in the tidal deltaplain of southwest Bangladesh. To identify the sources of dissolved salts and As, groundwater samples from the regional shallow Holocene aquifer were collected from tubewells during the dry (May) and wet (October) seasons in 2012-2013. Thirteen drill cores were logged and 27 radioca...

Abstract Three-dimensional geological and groundwater flow models of a submarine discharge (SGD) site at Hanko (Finland), in the northern Baltic Sea, have been developed to provide framework tool for estimation SGD rates into coastal sea. The dataset used consists gravimetric, ground-penetrating radar shallow seismic surveys, drill logs, level monitoring data, field observations, LiDAR digital ...