Menu
Search
Filters
Close
Menu

Save 20% on select titles with code HIDDEN24 - Shop The Sale Now

10402 THPS Degradation in the Long-term Preservation of Subsea Flowlines and Risers

Picture for 10402 THPS Degradation in the Long-term Preservation of Subsea Flowlines and Risers
Available for download

The Thunder Horse project’s sub-sea flow-lines were installed in 6,000’ water depths and filled with chemically treated seawater. After 2 years, investigations were done to determine continued effectiveness of the chemical treatments. 

Product Number: 51300-10402-SG
ISBN: 10402 2010 CP
Author: Jeffrey Willmon
Publication Date: 2010
Industries: Chemical Inhibitors , Maritime , Oil and Gas Production
$0.00
$20.00
$20.00

The Thunder Horse project’s sub-sea flow-lines were installed in 6,000’ water depths; the installation of the risers followed a year later. These lines were initially filled with chemically treated seawater in anticipation of hydro-testing and start-up. The initial chemical treatments were in accordance with BP guidelines and EPA GoM specific regulations. The initial chemical treatments consisted of a THPS biocide (~270 ppm), oxygen scavenger (~100 ppm), corrosion inhibitor (~100 ppm), and dye (~30 ppm). The initial chemically-treated fluids remained in place for up to two years during which time installation operations continued. Due to the extended length of fluid residence time, investigations were undertaken to determine the continued effectiveness of the chemical treatments in maintaining the mechanical integrity of the risers and flow-lines. The primary interest of this investigation was to determine the degradation rate of the active biocide product, THPS, under in-situ conditions. With an understanding of the biocide degradation rate, the Project Team could effectively and efficiently maintain the appropriate concentrations of biocide in the fill fluids for the control of microbial influenced corrosion. This paper summarizes the work done by the Thunder Horse Sub-sea Commissioning Team to investigate THPS degradation of chemically treated seawater in sub-sea risers and flow-lines. The investigation included the following. 1. Literature review of associated THPS degradation data, 2. Laboratory study to investigate the degradation of THPS in the sub-sea risers and flow-lines, and 3. A sampling campaign during the execution of the Thunder Horse project’s installation and commissioning scopes of work to quantify the actual THPS initial and final concentrations. Key Words: Hydrotest, THPS, MIC

The Thunder Horse project’s sub-sea flow-lines were installed in 6,000’ water depths; the installation of the risers followed a year later. These lines were initially filled with chemically treated seawater in anticipation of hydro-testing and start-up. The initial chemical treatments were in accordance with BP guidelines and EPA GoM specific regulations. The initial chemical treatments consisted of a THPS biocide (~270 ppm), oxygen scavenger (~100 ppm), corrosion inhibitor (~100 ppm), and dye (~30 ppm). The initial chemically-treated fluids remained in place for up to two years during which time installation operations continued. Due to the extended length of fluid residence time, investigations were undertaken to determine the continued effectiveness of the chemical treatments in maintaining the mechanical integrity of the risers and flow-lines. The primary interest of this investigation was to determine the degradation rate of the active biocide product, THPS, under in-situ conditions. With an understanding of the biocide degradation rate, the Project Team could effectively and efficiently maintain the appropriate concentrations of biocide in the fill fluids for the control of microbial influenced corrosion. This paper summarizes the work done by the Thunder Horse Sub-sea Commissioning Team to investigate THPS degradation of chemically treated seawater in sub-sea risers and flow-lines. The investigation included the following. 1. Literature review of associated THPS degradation data, 2. Laboratory study to investigate the degradation of THPS in the sub-sea risers and flow-lines, and 3. A sampling campaign during the execution of the Thunder Horse project’s installation and commissioning scopes of work to quantify the actual THPS initial and final concentrations. Key Words: Hydrotest, THPS, MIC

Product tags
Also Purchased
Picture for 10407 Compatibility of Tetrakis (Hydroxymethyl) Phosphonium Sulfate (THPS) and Ammonium Bisulfate
Available for download

10407 Compatibility of Tetrakis (Hydroxymethyl) Phosphonium Sulfate (THPS) and Ammonium Bisulfate (ABS)

Product Number: 51300-10407-SG
ISBN: 10407 2010 CP
Author: Jennifer Moore, Vic Keasler and Brian Bennett
Publication Date: 2010
$20.00

In this paper the compatibility of the biocide tetrakis(hydroxymethyl) phosphonium sulfate (THPS) and the oxygen scavenger ammonium bisulfite (ABS) were explored.  Performance testing of both the biocide in the presence of the oxygen scavenger and the oxygen scavenger in the presence of biocide are reported.
Picture for 10401 Prevention of Corrosion in Carbon Steel Pipelines Containing Hydrotest Water
Available for download

10401 Prevention of Corrosion in Carbon Steel Pipelines Containing Hydrotest Water-An Overview

Product Number: 51300-10401-SG
ISBN: 10401 2010 CP
Author: Adam Darwin, Karthik Annadorai and Krista Heidersbach
Publication Date: 2010
$20.00
Picture for 03572 CHEMICAL TREATMENT OPTIONS FOR HYDROTEST
Available for download

03572 CHEMICAL TREATMENT OPTIONS FOR HYDROTEST

Product Number: 51300-03572-SG
ISBN: 03572 2003 CP
Publication Date: 2003
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support