Sour-Well Serviceability of Higher-Strength Coiled Tubing
Bibliographic record
Abstract
Sour-Well Serviceability of Higher-Strength Coiled Tubing H. B. Luft; H. B. Luft BJ Services Co. Canada Ltd. Search for other works by this author on: This Site Google Scholar T. Padron; T. Padron BJ Services Co. Canada Ltd. Search for other works by this author on: This Site Google Scholar E. Kee; E. Kee BJ Services Co. Canada Ltd. Search for other works by this author on: This Site Google Scholar E. Szklarz E. Szklarz Shell Canada Ltd. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, U.S.A., March 2007. Paper Number: SPE-107014-MS https://doi.org/10.2118/107014-MS Published: March 20 2007 Connected Content Related to: Sour-Well Serviceability of Higher-Strength Coiled Tubing Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Luft, H. B., Padron, T., Kee, E., and E. Szklarz. "Sour-Well Serviceability of Higher-Strength Coiled Tubing." Paper presented at the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, The Woodlands, Texas, U.S.A., March 2007. doi: https://doi.org/10.2118/107014-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE/ICoTA Well Intervention Conference and Exhibition Search Advanced Search Abstract A joint industry project (JIP) among ExxonMobil Development Company, Shell Canada Limited and BJ Services Company Canada was initiated approximately 2 years ago to extend the prior research conducted into the serviceability of coiled tubing (CT) for under-balanced sour well drilling and work-over operations, to the higher strength (90 to 110 ksi SMYS) grades. A significantly different and unique laboratory testing protocol is employed in the present JIP research. The methodology entails full-body tubing specimens that have been immersed in a sour solution of varying severity followed by testing in a bend fatigue machine to determine the low cycle fatigue performance of high strength CT materials degraded by prior exposure to the sour environment. In addition, there are several important aspects of possible CT degradation from exposure to sour wells that were not adequately investigated previously. These include the incubation times for cracks to form due to hydrogen induced cracking (HIC) or sulphide stress cracking (SSC), the tensile strength integrity of coiled tubing strings in which HIC and/or SSC have formed, the relative resistance of different CT strength grades to HIC and SSC, the benefits of H2S corrosion inhibitors and the effects of different sour environment severities and external mechanical damage. Detailed metallographic examinations of the CT material characteristics that define their relative susceptibility to failure under sour conditions were also performed. Although the JIP research is still in progress, this presentation will reveal many of the significant results obtained to date with emphasis on CT operational implications and considerations. The newly obtained test results are also being exploited for the preparation of Alberta Industry Recommended Practices (IRP-21) currently under development in Canada. Keywords: Completion Installation and Operations, Corrosion Management, inhibitor, oilfield chemistry, Upstream Oil & Gas, concentration, Corrosion Inhibition, Coiled tubing operations, butt weld, bend fatigue life Subjects: Production Chemistry, Metallurgy and Biology, Completion Installation and Operations, Coiled tubing operations, Corrosion inhibition and management (including H2S and CO2) Copyright 2007, Society of Petroleum Engineers You can access this article if you purchase or spend a download.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".