Results 211 to 220 of about 833,494 (262)

The threshold scale inhibition phenomenon

Desalination, 1979
Abstract The precipitation of calcium carbonate has been studied in the absence and presence of hydroxyethylidene-1, 1-diphosphonic acid (HEDP). At ambient temperatures, a stable, threshold inhibited solution of calcium carbonate can be made in the presence of HEDP.
K.G. Cooper, L.G. Hanlon, G.M. Smart, R.E. Talbot   +3 more
openaire   +1 more source

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
openaire   +1 more source

Inhibition of Sulphate Scale Nucleation

Offshore Technology Conference, 1990
ABSTRACT The nucleation of (Ba, Sr)S04 scale has been studied on different surfaces representative of those likely to be encountered in oil production. The amount of scale formed and the efficiencies ofthree typical scale inhibitors depended on the surface used.
A.M. Pritchard, L.C. Buckley, N.R. Smart, P.J. Webb   +3 more
openaire   +1 more source

Inhibition Mechanisms for Sulphide Scales

SPE International Symposium and Exhibition on Formation Damage Control, 2008
Abstract Sulphide scales have over recent years become increasingly common in many oil and gas producing regions. The main sulphide scales are iron, zinc and lead, with the latter two often occurring together. This paper presents experimental results from a series of static iron sulphide (FeS) inhibition efficiency tests using 2 scale ...
C. Okocha, K. S. Sorbie, L. S. Boak
openaire   +1 more source

Dual Kinetic Hydrate Inhibition and Scale Inhibition by Polyaspartamides

Energy & Fuels, 2011
Polyaspartamides are a recently developed class of kinetic hydrate inhibitors (KHIs) with good biodegradability, made from polysuccinimide (PSI).
Pei Cheng Chua, Mariann Sæbø, Anette Lunde, Malcolm A. Kelland   +3 more
openaire   +1 more source

Potential kinetic model for scaling and scale inhibition mechanism

Desalination, 2016
Abstract Scale deposition occurs when dissolved salts precipitate from aqueous solution. Scale formation is reported to occur by two pathways, surface crystallization & bulk crystallization. Scaling in pipe system is a combination of these two mechanisms and is affected by process conditions in the pipe.
Yousef M. Al-Roomi, Kaneez F. Hussain
openaire   +1 more source

The Performance of Scale Inhibitors in the Inhibition of Iron Carbonate Scale

Proceedings of SPE Formation Damage Control Symposium, 1994
Abstract A potential mechanism for part of the production decline observed in the Prudhoe Bay field is siderite (iron carbonate) scale deposition. This laboratory investigation focused on evaluating the effect of the existing downhole scale inhibitor program on the proposed siderite formation damage mechanism.
B. G. Kriel, C. A. Lacey, R. H. Lane
openaire   +1 more source

[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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source