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02290 CORROSION AND HYDRATE INHIBITION IN HIGH SHEAR, LOW TEMPERATURE CONDITIONS

Picture for 02290 CORROSION AND HYDRATE INHIBITION...
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Product Number: 51300-02290-SG
ISBN: 02290 2002 CP
Author: Samuel E. Campbell, Weidong Li, Vu Thieu, and Lynn M. Frostman
Industry: Oil and Gas Production
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In subsea oil and gas production, both corrosion inhibitors and hydrate inhibitors are used for chemical treatment due to the severe conditions encountered. Performance is traditionally measured separately due to the low CO2 corrosion rates at temperatures where hydrates form, resulting in plugged flowlines. However, hydrates under certain conditions can alter the rate of metal loss due to changes in fluid chemistry and potentially due erosion and erosion corrosion. The effects corrosion inhibitors, methanol, and low dosage hydrate inhibitors (LDHI's) on the measured corrosion rate under low shear and high shear conditions in the presence of hydrates are concurrently measured. Under the test conditions, significant quantities of hydrates are formed without an inhibitor present. The difference in measured corrosion rates and the qualitative trends between methanol, hydrate inhibitors, a corrosion inhibitor, and their combinations are illustrated. The role of both temperature and shear stress in hydrate and corrosion inhibition is experimentally measured in the laboratory. The role of erosion due to hydrate formation is also explored. Keywords: deepwater, corrosion inhibitor, hydrate, gas production, electrochemistry, production chemicals, oil production, wet gas, hydrate inhibitor
In subsea oil and gas production, both corrosion inhibitors and hydrate inhibitors are used for chemical treatment due to the severe conditions encountered. Performance is traditionally measured separately due to the low CO2 corrosion rates at temperatures where hydrates form, resulting in plugged flowlines. However, hydrates under certain conditions can alter the rate of metal loss due to changes in fluid chemistry and potentially due erosion and erosion corrosion. The effects corrosion inhibitors, methanol, and low dosage hydrate inhibitors (LDHI's) on the measured corrosion rate under low shear and high shear conditions in the presence of hydrates are concurrently measured. Under the test conditions, significant quantities of hydrates are formed without an inhibitor present. The difference in measured corrosion rates and the qualitative trends between methanol, hydrate inhibitors, a corrosion inhibitor, and their combinations are illustrated. The role of both temperature and shear stress in hydrate and corrosion inhibition is experimentally measured in the laboratory. The role of erosion due to hydrate formation is also explored. Keywords: deepwater, corrosion inhibitor, hydrate, gas production, electrochemistry, production chemicals, oil production, wet gas, hydrate inhibitor
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Picture for 02274 EFFECTIVENESS OF CORROSION INHIBITORS...
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02274 EFFECTIVENESS OF CORROSION INHIBITORS IN RETARDING PROPAGATION OF LOCALISED CORROSION

Product Number: 51300-02274-SG
ISBN: 02274 2002 CP
Author: A. Turnbull, D. Coleman, A.J. Griffiths, P.E. Francis, and L. Orkney
Publication Date: 2002
$20.00

In many service applications excursions in solution chemistry, temporary loss of inhibitor, or transient increases in temperature may give rise to localised corrosion. To test the return of inhibition when the loss is remedied, the use of an artificial pit has been investigated using simulations of cooling water and of of oil production formation water.
Picture for 07663 The Effect of Oxygenated Methanol on Corrosion in Sour Wet Gas Environments
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07663 The Effect of Oxygenated Methanol on Corrosion in Sour Wet Gas Environments

Product Number: 51300-07663-SG
ISBN: 07663 2007 CP
Author: Neil Park, Sherif Maksoud, Lara Morello, and Jennifer E. Wong
Publication Date: 2007
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This paper studies the effect of oxygen in methanol on the structures and growth kinetics of iron sulfide scales. Gravimetric weight analysis was used to evaluate the corrosion mechanisms and rates. Scanning Electron Microscope/ Energy Dispersive X-ray Spectrometry (SEM/EDX), Optical Microscope and X-ray Diffraction (XRD) were used to analyze the scale.

 
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02276 WHY CORROSION INHIBITORS DO NOT PERFORM WELL IN SOME MULTIPHASE CONDITIONS: A MECHANISTIC STUDY

Product Number: 51300-02276-SG
ISBN: 02276 2002 CP
Author: Hongbin Wang, Hongwei Wang, Hua Shi, Cheolho Kang, and Paul W. Jepson
Publication Date: 2002
$20.00

Results of inhibitor performance at slug flow in a 101.6 mm inner diameter horizontal pipeline. Electrochemical Impedance Spectroscopy (EIS) and scanning electrom microscope (SEM) techniques are used to reveal that the strong bubble impact, high shear stress and turbulent intensity are the reasons for a poor performance of inhibitor.
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