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Bias weld

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Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, March 22–23, 2016
Paper Number: SPE-179045-MS
... Figure 2 Bias weld in a helical shape after forming the pipe. Fatigue crack propagating through the bias weld (filler metal or heat-affected-zone) ( Fig. 11 ) Severe striping at the bias welds ( Fig. 10 ). Striping was also observed when fatigue testing bias welds to failure. ( Fig...
Proceedings Papers

Paper presented at the SPE/ICoTA Well Intervention Conference and Exhibition, March 26–27, 2019
Paper Number: SPE-194246-MS
.... This development led to the creation of the first-ever vacuum chamber of its kind—one that does not entirely enclose the product. The working PVD prototype has been successfully installed at the manufacturing facility in Houston, and test strings coated locally on the bias welds have been created. The paper...
Proceedings Papers

Paper presented at the SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, March 24–25, 2015
Paper Number: SPE-173660-MS
... by the service companies involved. In 2013, for one particular client, a series of failures on the coiled tubing string bias welds was observed, with a root cause due to the presence of sulfate-reducing bacteria (SRB) in the recirculated water. Two different mechanisms were identified as causing the premature...
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100 grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location at <b>bias</b> <b>weld</b> fil...
Published: 23 March 2010
Figure 17 100 grade bias weld exposed to 50% H 2 S. Pinhole location at bias weld filler metal More
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110 grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location at <b>bias</b> <b>weld</b> fil...
Published: 23 March 2010
Figure 20 110 grade bias weld exposed to 50% H 2 S. Pinhole location at bias weld filler metal More
Images
100 grade <b>bias</b> <b>weld</b> CLT - 25% H 2 S. SSC failure at the <b>bias</b> <b>weld</b> filler me...
Published: 23 March 2010
Figure 26 100 grade bias weld CLT - 25% H 2 S. SSC failure at the bias weld filler metal More
Images
Schematic view of the <b>Bias</b> <b>Weld</b> (left) and a <b>Bias</b> <b>Weld</b> with a Masking&#x2F;Coati...
Published: 18 March 2019
Figure 3 Schematic view of the Bias Weld (left) and a Bias Weld with a Masking/Coating (right) applied to one side. More
Images
90-grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location at seam-<b>weld</b>&#x2F;<b>bias</b>...
Published: 18 November 2010
Figure 15 90-grade bias weld exposed to 50% H 2 S. Pinhole location at seam-weld/bias-weld intersection. More
Images
90 grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location at seam <b>weld</b>-<b>bias</b>...
Published: 23 March 2010
Figure 15 90 grade bias weld exposed to 50% H 2 S. Pinhole location at seam weld-bias weld intersection More
Images
100-grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location within the <b>weld</b>-...
Published: 18 November 2010
Figure 17 100-grade bias weld exposed to 50% H 2 S. Pinhole location within the weld-metal zone of the bias weld. More
Images
100-grade <b>bias</b> <b>weld</b>—100% H 2 S + inhibitor A. Pinhole location at seam-<b>weld</b>...
Published: 18 November 2010
Figure 19 100-grade bias weld—100% H 2 S + inhibitor A. Pinhole location at seam-weld/bias-weld intersection. More
Images
110-grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Pinhole location within the <b>weld</b>-...
Published: 18 November 2010
Figure 20 110-grade bias weld exposed to 50% H 2 S. Pinhole location within the weld-metal zone of the bias weld. More
Images
100-grade <b>bias</b>-<b>weld</b> CLT—25% H 2 S. SSC failure within the <b>weld</b>-metal zone o...
Published: 18 November 2010
Figure 26 100-grade bias-weld CLT—25% H 2 S. SSC failure within the weld-metal zone of the bias weld. More
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100-grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Micrographs showing pinhole locat...
Published: 18 November 2010
Figure 18 100-grade bias weld exposed to 50% H 2 S. Micrographs showing pinhole location within the weld-metal zone of the bias weld. More
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80 grade <b>bias</b> <b>weld</b> tested with 50% H 2 S – Pinhole location
Published: 23 March 2010
Figure 14 80 grade bias weld tested with 50% H 2 S – Pinhole location More
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90 grade <b>bias</b> <b>weld</b> exposed to 50% H 2 S. Failure by HIC in the base metal
Published: 23 March 2010
Figure 16 90 grade bias weld exposed to 50% H 2 S. Failure by HIC in the base metal More

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