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51318-10508-HSLA material design and its susceptibility to cracking during acidic stimulation jobs in Shale well

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This paper presents the experimental work done with different API 5CT P110 materials under high levels of stress created by a solution of HCl acid.

Product Number: 51318-10508-SG
Author: Carlos Blanc / Guillermo Echaniz / Ramiro Mazzina / Gustavo Kissner
Publication Date: 2018
Industry: Oil and Gas Production
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Hydraulic fracturing treatments in unconventional wells increase stress levels in API couplings and have been one of the key contributing factors that caused many costly failures in the field in the recent years. The combination of these overstressed connections; material susceptibility and presence of hydrogen have led to a Hydrogen stress-cracking phenomenon, with brittle longitudinal cracks in the couplings.

 This paper presents the experimental work done with different API 5CT P110 materials under high levels of stress in a very demanding environment that was created by a solution of HCl acid with none to different levels of inhibition. The analyzed conditions were simulated for short time intervals, in similar way that they are experienced in most plug & perf completions typically performed in the majority of shale’s wells.

Key words: Grade P110, Hydrogen stress cracking, Brittle fracture, Couplings failures.

Hydraulic fracturing treatments in unconventional wells increase stress levels in API couplings and have been one of the key contributing factors that caused many costly failures in the field in the recent years. The combination of these overstressed connections; material susceptibility and presence of hydrogen have led to a Hydrogen stress-cracking phenomenon, with brittle longitudinal cracks in the couplings.

 This paper presents the experimental work done with different API 5CT P110 materials under high levels of stress in a very demanding environment that was created by a solution of HCl acid with none to different levels of inhibition. The analyzed conditions were simulated for short time intervals, in similar way that they are experienced in most plug & perf completions typically performed in the majority of shale’s wells.

Key words: Grade P110, Hydrogen stress cracking, Brittle fracture, Couplings failures.

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