Results 241 to 250 of about 6,810,560 (294)

Combined Scale Removal and Scale Inhibition Treatments

International Symposium on Oilfield Scale, 2000
Abstract Calcium carbonate scale impacts oil production in a large number of fields worldwide. This scale is generally managed by acid washing to removal the scale and/or by performing scale inhibition treatments. The choice between inhibition and regular stimulation is cost driven, with high cost operations generally selecting ...
P.S. Smith, C.C. Jr., A. Rojas
openaire   +1 more source

Investigation of Calcium Carbonate Scaling Inhibition and Scale Morphology by AFM

Journal of Colloid and Interface Science, 2001
The calcium carbonate scale inhibition by two inhibitors, polyacrylic acid (PAA) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), has been studied in two heat transfer systems: recirculating cooling water and pool boiling systems. It is found that PBTCA has a better inhibition effect than PAA under identical conditions.
Qingfeng, Yang, Yangqiao, Liu, Anzhong, Gu, Jie, Ding, Ziqiu, Shen   +4 more
openaire   +2 more sources

Inhibition of Barite Scale in the Presence Of Hydrate Inhibitors

SPE International Symposium on Oilfield Scale, 2004
Abstract Large volumes of hydrate inhibitors (e.g., methanol, ethanol, monoethylene glycol, and triethylene glycol as cosolvent) are added to control hydrate formation. Such practice has an adverse effect on scale formation since the mineral salts are generally less soluble in the cosolvent.
Mason Tomson, Amy Kan, Fu Gongmin
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

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

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

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
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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
openaire   +1 more source