Development and Use of a Through-Tubing Aluminum Cement Basket
Bibliographic record
Abstract
Development and Use of a Through-Tubing Aluminum Cement Basket J.S. Lam; J.S. Lam Adams Pearson Associates Inc. Search for other works by this author on: This Site Google Scholar J.R. Lee; J.R. Lee Lee Specialties Ltd. Search for other works by this author on: This Site Google Scholar N. Hands; N. Hands Shell Canada Ltd. Search for other works by this author on: This Site Google Scholar R. Nelson; R. Nelson Shell Canada Ltd. Search for other works by this author on: This Site Google Scholar T. Murphy T. Murphy Shell Canada Ltd. Search for other works by this author on: This Site Google Scholar Paper presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, September 2001. Paper Number: SPE-71680-MS https://doi.org/10.2118/71680-MS Published: September 30 2001 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Lam, J.S., Lee, J.R., Hands, N., Nelson, R., and T. Murphy. "Development and Use of a Through-Tubing Aluminum Cement Basket." Paper presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, September 2001. doi: https://doi.org/10.2118/71680-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 Annual Technical Conference and Exhibition Search Advanced Search AbstractAn ingenious and inexpensive removable through-tubing cement basket has been constructed for use in open or cased hole and highly corrosive environments. While the basket was designed specifically for use in deep sour gas wells with sulphur deposition problems, it can be used in any zonal isolation application. A conventional inflatable through-tubing bridge plug can be used in sour service, but its elastomeric components make the plug vulnerable in the presence of sulphur solvents and amine based corrosion inhibitors. The cement basket is constructed from 100% aluminum, which eliminates the problems associated with the elastomeric materials and assures complete removal with acid, thus leaving no debris in the well.In June 2000, the cement basket was successfully deployed in a deep, sour, horizontal gas well. The 54mm OD basket was run through the tapered 89/73mm OD tubing string before being expanded in the 127mm OD production liner and capped with 4 metres of calcium carbonate chips and 10 metres of cement to provide the pressure integrity. Once cemented, the basket became a plug providing well control for workover operations and a barrier preventing fluid and debris loss to the formation. Subsequently, the permanent packer was milled and retrieved, enabling a new packer and larger tubing to be installed. The aluminum basket with the carbonate and cement cap was successfully milled out using coiled tubing in less than three hours. A small quantity of acid was used to remove any debris from the cement basket and cement sheath from the liner wall.While the cement basket is a new development, it is deployed using conventional, field proven equipment. It is also simpler and offers the potential for cheaper solutions than a conventional expandable bridge plug. With the experience gained, the next challenge is to build a 42 mm O.D. plug to be set inside 178mm OD casing, which will be more universally applicable for wells in Western Canada and around the World.IntroductionDownhole operations require the use of plugs for a variety of reasons. For example, downhole plugs may be used to isolate a section of a wellbore or to abandon a zone in the reservoir. They are also used to control production from a well or to permit selective zonal work such as stimulating part of the reservoir. Downhole plugs can also be used as a platform in conjunction with cementing operations or to prevent debris from falling deeper into the wellbore. Debris can be naturally occurring or can be generated by operations such as the milling of a packer. Plugs are also commonly used to prevent fluid loss to the formation during workover operations, which might otherwise result in formation damage.In the production of highly sour reservoirs, downhole conditions can be highly corrosive, due to the presence of aggressive chemicals such as downhole solvents like dimethyl disulfide (DMDS), corrosion inhibitors, H2S, CO2, and elemental sulfur. To be useful in the production of such reservoirs, a downhole plug must remain functional in such a highly corrosive environment.It should be possible to remove the plug without leaving debris in the wellbore, which could interfere with subsequent operations or production of reservoir fluids. This is especially true for wells that are prone to scaling and sulfur deposition and that have no sump to hold the debris below the location of the downhole plug, such as in the case of a wellbore that is highly deviated or horizontal through the producing zone. Keywords: corrosion inhibition, acid, deployment, upstream oil & gas, bridge plug, production chemistry, society of petroleum engineers, aluminum cement basket, downhole plug, sulphur solvent Subjects: Production Chemistry, Metallurgy and Biology, Completion Installation and Operations, Corrosion inhibition and management (including H2S and CO2) This content is only available via PDF. 2001. 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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".