Deep gas wells and fields have the characteristics of high pressure. The vibration tubing string during production causes to be subjected severe stress even dynamic fatigue failure. Therefore, this article is based on finite element theory, aiming at large-size strings in deep wells. mechanics model mathematical packer high-pressure were established, ANSYS software was re-developed. analysis pr...

Nineteen representative water samples were collected from surface and ground water sources, covering urban, rural area, shallow and deep aquifers in Pondicherry region. The samples were analysed for various pesticide residues such as HCH, Aldrin and DDT. Both surface and ground water sources found to exhibit the residuals of various pesticides. The residual levels oforganochlorine pesticides we...

Petrochemical industry is one of the key industry areas where Internet of Things (IoTs) and big data analytics could be widely applied to support smarter production and maintenance. In oil and gas exploitation, sucker-rod pumping systems are used in approximately 90 percent of artificially lifted wells. An automatic pipeline is crucial for real-time condition monitoring and fault detection of t...

Following a period of exploration and development in the mid-late 1970’s, there was little activity at the Raft River geothermal field for the next ~20 years. US Geothermal Inc. acquired the project in 2002, and began commercial power generation in January 2008. From mid-2004 to present, US Geothermal Inc. has collected geochemical data from geothermal and monitoring wells in the field, as well...

Here, the first account of self-resonant fully-colloidal u-lasers made from colloidal quantum well (CQW) solution is reported. A deep patterning technique developed to fabricate well-defined high aspect-ratio on-chip CQW resonators grating waveguides and in-plane reflectors. CQWs patterned layers are closed-packed with sharp edges residual-free lifted-off surfaces. Additionally, method successf...

The potential-energy surface of the ground electronic state of CaHCl has been obtained from 6400 ab initio points calculated at the multireference configuration-interaction level and represented by a global analytical fit. The Ca+HCl-->CaCl+H reaction is endothermic by 5100 cm(-1) with a barrier of 4470 cm(-1) at bent geometry, taking the zero energy in the Ca+HCl asymptote. On both sides of th...

Mita is a moderate temperature geothermal system that was discovered in 1997 during gold exploration in south-eastern Guatemala. This system is associated with bimodal basaltrhyolite volcanism, and occurs alongside (and overlapping with) the Cerro Blanco 2 million ounce epithermal gold deposit. Four 1000-1500m deep slim holes were drilled in 2008-09 to confirm the nature of the deep reservoir. ...