Results 261 to 270 of about 1,432,052 (301)

Scale Inhibition by the Squeeze Technique

Journal of Canadian Petroleum Technology, 1969
ABSTRACT The productivity of many wells has been seriously reduced in the pastbecause of scale deposition. In some fields, the produced water is saturatedwith gyp (calcium sulphate) that precipitates in the pores of the reservoirformation sand near the wellbore.
J.K. Kerver, J.K. Heilhecker
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Investigation and Improvement of BaSO4 Scale Inhibition Tests

International Symposium on Oilfield Chemistry, 1997
Abstract The commonest means of laboratory evaluation/screening of scale inhibitors for oilfield applications is by conducting scale inhibition jar tests. This paper focuses on several aspects concerning barium sulphate scale inhibition jar tests and highlights three particular factors which may influence the test outcome and the ranking
M.D. Yuan, M. Anderson, E. Jamieson
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Downhole Scale Formation and Inhibition in Mild Sulphate Scaling Conditions

SPE International Symposium on Oilfield Chemistry, 2005
Proposal The presence of a mild scaling regime in a field necessitates effective measures to be taken to prevent scale formation before production is adversely impacted. However, in many cases the scaling regimes are too mild to be investigated by conventional laboratory inhibitor test protocols under realistic timescales. In such cases,
R. Stalker, G.M. Graham, G. Hellings, Joanne Williams, I. Littlehales   +4 more
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Aluminum silicate scale formation and inhibition (2): scale solubilities and laboratory and field inhibition tests

Geothermics, 1998
Abstract The solubilities of pure silica, iron-silicate and aluminum-silicate scales were measured in water from 25–250°C in a laboratory pressure reactor. Iron- and aluminum-silicate scales are significantly less soluble than pure amorphous silica.
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Scaling Risk and Inhibition Prediction of Carbonate Scale at High Temperature

SPE International Conference on Oilfield Chemistry, 2017
Abstract Calcium carbonate is the most common scales in oilfield and thus has been heavily studied. However, calcium carbonate scale problems continue to occur in oilfield causing significant economic loss. To better control carbonate scale, reliable models on carbonate scaling risk and inhibition predictions are clearly necessary, which
Fangfu Zhang, Zhaoyi Dai, Zhang Zhang, Hamad Al-Saiari, Fei Yan, Narayan Bhandari, Gedeng Ruan, Ya Liu, Yi-Tsung Lu, Guannan Deng, Amy T. Kan, Mason B. Tomson   +11 more
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Biomimetic scale-resistant polymer nanocomposites: towards universal additive-free scale inhibition

Journal of Materials Chemistry A, 2018
Scale-resistant membranes may be produced by incorporating nanoengineered anionic hairy cellulose crystals into model polymer matrices.
Amir Sheikhi, Ashok Kakkar, Theo G. M. van de Ven   +2 more
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Barium Sulfate Crystal Growth and Inhibition: Implications of Molecular Structure on Scale Inhibition.

CORROSION 2016, 2016
Abstract. Barium sulfate scale deposits are serious impediments in the gas and oil production industry, as they are tenaciously adhering on surfaces and they are hard to remove due to the independence of their solubility on pH. The practice most commonly applied is prevention of their formation using water soluble compounds acting as ...
Evangelos Athanassopoulos, Stamatia Rokidi, Petros G. Koutsoukos   +2 more
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Inhibition of Calcium Carbonate Scale Using an Environmental Friendly Scale Inhibitor

Tenside Surfactants Detergents, 2017
Abstract Calcium carbonate is considered as the most frequent scale commonly occurring in cooling water systems. To reduce calcium carbonate scale in an environment–friendly way, a copolymer consisting of acrylic acid (AA)-acrylamide (AM)-polypropylene glycol and maleic anhydride (PPGAZMA) was developed to inhibit this phenomenon.
Huchuan Wang, Chengjun Peng, Yujuan Jian, Chenchen Fang, Xianna Wang, Xuewu Li, Chuanrun Li   +6 more
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[The WP scale, an evaluation scale of anxious inhibition].

L'Encephale, 1988
The phenomenon of inhibition concerns a feeling of being blocked in usual functioning. It is frequently encountered, in many disorders. Using a general model of anxiety, the authors propose a taxonomy of the phenomenon into inhibition in anxiety states and inhibition associated with other disorders, a differentiation between generalized inhibition and ...
D, Widlocher, C B, Pull
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Aluminum silicate scale formation and inhibition: Scale characterization and laboratory experiments

Geothermics, 1997
Amorphous silica scale enriched in aluminum is deposited from a variety of geothermal brines. Scale deposits examined in the present study are formed by tetrahedrally-coordinated aluminum substitution within an amorphous silica framework. There is no evidence that aluminum in these scales derives from distinct aluminum minerals, such as gibbsite, or ...
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