Dynamic mechanical properties of different types of rocks
The results show that with the increase of SHPB impact pressure (0.5–0.8 MPa), the stress peak values of granite, marble, and limestone also increase, while gypsum and reef limestone follow no ...
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HANDLING AND STORAGE OF GYPSUM PANEL …
The typical plastic wedge is 24 in. (600 mm) long by 8 in. (200 mm) wide with a 3 in. (75 mm) thick butt and is used in the same manner as the wooden wedge. Plastic wedges may be preferable because of their low cost and light weight nature, plus they generally last longer. Figure 5 – Typical Wedge Block.
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An insight review on formation damage induced by drilling …
This article reviews the research works published during the past 30 years on formation damage associated with drilling fluids, including mechanical damage, chemical …
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ed gypsum for multipurpose applications in building
Abstract. Gypsum plasterboards are nowadays very appreciated in buildings, mainly due to their lightness, thermal insulation and suitable sound transmission loss when used in double walls. However thermal and acoustic features of gypsum plasterboard can be enhanced. In the present study an innovative method, consisting in the direct addition …
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AADE-02-DFWM-HO-31
The increase in the water content in the shale due drilling fluid exposure can lead to an increase in near-wellbore pore pressure and subsequent changes in the effective stress-state. In many cases, borehole instability arises from insufficient mud column support on the borehole wall from an inadequate mud weight or a time-
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Utilization of desulfurization gypsum potentially impairs the …
The total average Hg emitted due to FGD gypsum resource utilization in China in 2017 was estimated to be 11.42 tons (ranging between 2.15 and 38.35 tons), which accounted for about 23.8 % (ranging between 4.6 and 79.8%) of the stack Hg emissions from CFPPs in that year. ... the ratios of FGD gypsum used for wallboard …
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PEH:Drilling Problems and Solutions
The most prevalent drilling problems include pipe sticking, lost circulation, hole deviation, pipe failures, borehole instability, mud contamination, formation damage, hole cleaning, H 2 S-bearing formation and shallow gas, and equipment and personnel-related problems. Understanding and anticipating drilling problems, understanding their …
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Increased Operational Safety and Efficiency with Managed Pressure Drilling
ABSTRACT. Planning has always been essential to create and maintain a safe drilling environment. Safety and environmental concerns are now a larger concern than ever before with the increasing difficulty in drilling projects and the more sensitive environmental areas that wells are being constructed and produced from. This is …
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Effects of Brine Concentration and Pressure Drop on Gypsum …
The solubility of gypsum or anhydrite in water increases with pressure due to a slight decrease in total volume as the salt dissolves. Upon release of pressure a …
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A Novel Method to Determine the Drilling Fluid Density for …
This paper established a composite gypsum-salt model based on the rock mechanism and experiments, and a safe-drilling density selection layout is formed to solve the borehole …
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Increasing Drilling Speed in Hard-to-Drill Formations with …
As shallow oil and gas resources become scarce, exploring deep formations for oil and gas resources has become a long-term focus. However, the high compressive strength and poor drillability [1,2,3] of deep stratum rocks seriously restrict the development speed of deep oil and gas resources.To overcome this challenge, drilling speed …
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A Look at US Gypsum Production
Wyoming. In total, the US produced an estimated 17.5 million metric tons (Mt) of crude gypsum in 2017, with the states above contributing about 86% to domestic output. US crude production accounted for 13% of …
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The Successful Application of MPD Technology in Drilling
The ultra-high pressure saltwater formation coupled with high permeability sand intercalation makes the ultra-deep salt and gypsum formation (6670–7700 m TVD) …
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Scales
Operational Problems Due to Scales. Scale deposits are not restricted to any particular location in the production system, although some locations are more important than others in terms of ease and cost of remedial treatment. The following are areas or events where scale formation is possible in production systems. Drilling/Completing Wells
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A comprehensive review of flue gas desulphurized gypsum: Production …
In 2020, global FGD gypsum production reached an estimated 255 million tons, primarily in Asia (55%), followed by Europe (22%), North America (18%), and the rest of the world (5%). ... as expected ...
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Does gypsum formation during sulfate attack on concrete …
To simplify the chemical reaction process and eliminate the effects of ettringite formation, the suitable materials for the research on the sulfate attack caused by gypsum formation are the cement minerals: C 3 S or C 2 S. In this study, two kinds of C 3 S were used. A limited amount available as a gray powder alite was provided by Concrete …
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Gypsum: a review of its role in the deterioration of
The deterioration of buildings and monuments by gypsum is the result of crystallization cycles of this salt. Although gypsum can dehydrate to a hemihydrate, the mineral bassanite, and to an anhydrate, the mineral anhydrite, this reaction occurs in nature on a geological time scale and therefore it is unlikely to occur when gypsum is found on …
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Multiphase Flow Behaviors and Wellhead Backpressure
where, P is the wellbore pressure, Pa; f is the friction coefficient; d h is the equivalent diameter, m; g is the acceleration of gravity, m2/s; θ is the well inclination angle, rad. 98.2.2 Heat Transfer Model. According to the first law of thermodynamics, the two-phase transient heat transfer model of annular air–liquid two-phase flow can be …
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Identification and evaluation of well integrity and
CO 2 has a tendency to migrate through natural fractures and defects prevailing in the cement due to operational pressure and temperature fluctuations, shrinkage during hydration, mechanical shock from pipe movements, solid cuttings and drilling fluid residuals in the cement, and poor cementing jobs. Also, the prevailing …
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High-quality gypsum binders based on synthetic calcium …
The increase of the compressive strength of the binder with an increase in particle size can be explained by the fact that, with a decrease in the dispersion of the binder, the supersaturation of the gypsum solution during hydration increases due to better solubility of the gypsum crystals. This leads to an increase in the number of surface ...
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A Novel Method to Determine the Drilling Fluid Density for Gypsum …
The hydration expansion of the gypsum is the dominant reason for the shrinkage of the composite salt-gypsum layer. In order to mitigate the borehole diameter reduction, the drilling fluid density ...
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Analysis of the External Pressure on Casings Induced by Salt-Gypsum …
The external pressure on the casing was analyzed in different drilling directions, with curvature radii of 573 and 859.5 m (with borehole curvatures of 3°/30 and 2°/30 m, respectively) and a casing thickness of 12 mm. Figure 11 shows the equivalent stresses on a casing for a creep time of 0.1, 1, 3, 5 and 10 years when drilling either …
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Sustainable Uses of FGD Gypsum in Agricultural Systems …
In addition, local beneficial use of FGD gypsum lessens the demand for gypsum production and land degradation associated with mining, reduces manufacturing energy expenditures, and avoids long distance transportation costs. Thus, beneficial use of FGD gypsum can provide benefits to agriculture, utilities, and the …
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Loss circulation in drilling and well construction: The …
Rehm et al. (2013) reported a statistical study showing that for a period of 10 years more than 12% of NPT was due to loss circulation in the Gulf of Mexico (GoM) and about 18% was due to resulted kicks and wellbore instabilities. Similar studies showed that in general loss circulations can increase drilling cost by $70 to $100 per foot.
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Gypsum formation mechanisms and their contribution to
The observation of gypsum formation in hardened cement paste prepared with C 3 A-free PC L (Fig. 10) that lead to a free expansion during storage in 3000 mg l −1 SO 4 2−, but did not cause expansion pressure larger than the initial tension, indicates that this type of gypsum formation can increase the volume of the overall sample but does ...
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The Successful Application of MPD Technology in Drilling
Fluid losses while drilling the salt and gypsum formation, which occur due to lower pressure sand and mudstone formations trapped between the salt. ... MPD of constant liquid volume effectively reduced the non-production time, shortened the drilling duration, and opened up a new method for safe and rapid drilling of the high-pressure …
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The state-of-the-art review on the lost circulation
The LCM blend increased fracture pressure by 70% compared to the unblended water-based drilling mud (Nwaoji et al. 2013). According to Contreras et al. ( 2014a ) and Contreras et al. ( 2016 ), the use of in-house produced calcium- and iron-based NPs as LCMs in invert-emulsion drilling muds was examined in order to prevent …
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FGD Gypsum Production Process
FGD Gypsum Production Process. Mineralogically identical to natural gypsum, FGD gypsum, or synthetic gypsum, is produced from gas captured within emission control systems at coal fired electric utilities. …
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Production
Demand for natural gypsum was 45Mt, up by 3% from 43.7Mt in 2022. The market imported 8.1Mt of gypsum throughout the year, up by 18% year-on-year. Domestic production of crude gypsum in the US dropped by 1.3% year-on-year in 2023, to 22Mt. Exports grew by 15% to 45,000t. Published in Global Gypsum News.
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The Pressures of Drilling and Production | Request PDF
The development of geopressured systems and the effects of formation pressure on drilling, evaluation, production, and recovery of hydrocarbons are discussed.
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