Combining a Mechanical and Chemical Solution To Mitigate Corrosion inMPD/UBD/Air-Drilling Operations
Bibliographic record
Abstract
Combining a Mechanical and Chemical Solution to Mitigate Corrosion in MPD/UBD/Air Drilling Operations David P. Kippie; David P. Kippie Weatherford Intl. Search for other works by this author on: This Site Google Scholar Charlie E. Bellinger; Charlie E. Bellinger Weatherford Intl. Search for other works by this author on: This Site Google Scholar Paul D. Scott Paul D. Scott ConocoPhillips Search for other works by this author on: This Site Google Scholar Paper presented at the IADC/SPE Managed Pressure Drilling & Underbalanced Operations, Galveston, Texas, U.S.A., March 2007. Paper Number: SPE-108338-MS https://doi.org/10.2118/108338-MS Published: March 28 2007 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Get Permissions Search Site Citation Kippie, David P., Bellinger, Charlie E., and Paul D. Scott. "Combining a Mechanical and Chemical Solution to Mitigate Corrosion in MPD/UBD/Air Drilling Operations." Paper presented at the IADC/SPE Managed Pressure Drilling & Underbalanced Operations, Galveston, Texas, U.S.A., March 2007. doi: https://doi.org/10.2118/108338-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/IADC Managed Pressure Drilling and Underbalanced Operations Conference and Exhibition Search Advanced Search Abstract Corrosion mitigation is critical for successful managed pressure drilling (MPD), underbalanced drilling (UBD), and air drilling operations. During these operations, large volumes of gas are injected to lower the hydrostatic pressure in the annulus. Most often the injected gas contains some oxygen and the gas is circulated in combination with some quantity of drilling fluid or liquid. Due to the oxygen content and aqueous environment, corrosion potential during MPD/UBD/air drilling operations is high.Without a proper corrosion mitigation program during these operations, corrosion can lead to the catastrophic failure of drillstring components with corrosion rates 15 times or higher than the industry-acceptable rate of <2 lb/ft2/yr. These high corrosion rates can lead to numerous operational problems resulting in higher well costs and/or formation damage.This paper discusses how to properly design, implement, and monitor a successful corrosion program to mitigate corrosion during MPD/UBD/air drilling operations. Furthermore, it highlights a process that utilizes membrane technology as a mechanical means of reducing oxygen concentration in the gaseous media in combination with chemical corrosion inhibitors to alter the drilling fluid environment. By using this process, the corrosion rates can be controlled to satisfactory levels during these operations.Other areas of discussion include membrane technology, drilling fluid chemistry in terms of corrosion control, and the types of corrosion that occur during a MPD/UBD/air drilling operation. Laboratory data will be presented demonstrating the development and limits of the various corrosion control chemistries. And finally, the operational considerations of an effective corrosion control program with case histories will be presented. Keywords: materials and corrosion, well integrity, inhibitor, flowline corrosion, Subsurface Corrosion, corrosion inhibitor, Pipeline Corrosion, riser corrosion, concentration, water influx Subjects: Drilling Operations, Pressure Management, Drilling Equipment, Drilling Fluids and Materials, Well & Reservoir Surveillance and Monitoring, Production Chemistry, Metallurgy and Biology, Pipelines, Flowlines and Risers, Reservoir Characterization, Fluid Characterization, Improved and Enhanced Recovery Copyright 2007, IADC/SPE Managed Pressure Drilling and Underbalanced Operations Conference and Exhibition You can access this article if you purchase or spend a download.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.007 | 0.002 |
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 source (direct Gemma or distilled Codex), 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".