The use of hexamethyldisilazane (HMDS) as a drying agent was investigated in the specimen preparation for scanning electron microscopy (SEM) imaging of bacterial surface colonization on sub-bituminous coal. The ability of microbes to biofragment, ferment and generate methane from coal has sparked interest in the initial attachment and colonization of coal surfaces. HMDS represents an … Continue reading
Monthly Archives: June 2015
The use of solids free brines as completion fluids like calcium bromide has given rise to the need for methods of fine solids removal. Filtration of clear brines has become a major concern to operators. The mechanics of removal include sieving, bridging, adsorption, and settling within the porous matrix. Parameters such as flow density or … Continue reading
Water adsorption by porous low-k silica films results in increased dielectric constants and is often due to silanol groups on the pore surfaces. Reacting the silanols with silylating agents (e.g., hexamethyldisilazane (HMDS) and trimethylchlorosilane (TMCS)) in supercritical CO2 (SC-CO2) can increase film hydrophobicity and can remove adsorbed water. In porous methylsilsesquioxane (MSQ) films (average pore … Continue reading
As per a latest research report, World demand for oilfield chemicals like calcium bromide is forecast to increase 6.0 percent per year to $33 billion in 2019 as technological advances and a healthy level of oil and gas exploration and development activity drive gains.
Global clear brine fluids market was 920 kilo tons in 2012. Growing drilling activities across China, Egypt, Russia, Gulf of Mexico and the U.S. on account of growing energy demand is expected to remain a key driving factor for global clear brine fluids market. Increasing drilling activities has prompted the increase in global rig count … Continue reading
The silation of silica with hexamethyldisilazane (HMDS) was examined over the temperature range 150−450 °C. The products and sequence of the reactions at the silica surface were determined. The major products are hexamethyldisiloxane (HMDSO) and ammonia, with lesser amounts of nitrogen and methane. No methane is produced during reactions below 300 °C. Ammonia is the … Continue reading