نتایج جستجو برای: drilling fluids
تعداد نتایج: 56003 فیلتر نتایج به سال:
Polyacrylamide and its derivatives are the most widely used industrial water-soluble acrylic polymers due to their low cost high molecular weight. In drilling, there is a great demand for associating copolymers of acrylamide hydrophobic comonomers. Therefore, processes synthesis hydrolysis copolymer maleic acid were studied obtain drilling fluid stabilizers. The highest viscosity characteristic...
PURPOSE The aim of this study was to assess short-term changes in pulmonary function in drill floor workers currently exposed to airborne contaminants generated as a result of drilling offshore. We also aimed to study the prevalence of pulmonary fibrosis using high-resolution computed tomography (HRCT) scans of another group of previously exposed drill floor workers. METHODS Pulmonary functio...
The need for flexibility in operation and minimized drill time has necessitated the extended use of coiled tubing drilling technology. Among others, the technology eliminates the time to connect drill pipes and thus enables a quick retraction and insertion of different tools in the well. On the other hand, the complexity of the operating conditions makes the task of testing functionality of com...
Reservoir depletion will cause the safe equivalent circulation density (ECD) operating window of drilling fluids to narrow, or even disappear. Previous studies have proposed a set of two specific casings at the top and bottom of the depleted reservoir, respectively, or conducted wellbore strengthening to increase fracture pressure, but these will cause a waste of time and costs, or differential...
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