Coiled Tubing Operations from a Work Boat
Bibliographic record
Abstract
Abstract Unless there is support provided by a workover rig or temporary fixed platform, coiled tubing (CT) intervention workover on a small offshore platform is not feasible. Usually, small offshore platforms have low deck load capacity and available deck space is insufficient for CT workover operations. To puzzle out the solution to this issue, CT operations from a vessel were discussed and subsequently developed more than a decade ago. In 2002, the technique was substantially refined and improved to improve safety and reliability, which allows well intervention from the deck of a floating anchored vessel. This technique utilizes a system which provides emergency CT disconnect and effectively compensates wave motion. The system includes the CT slack-disconnect assembly, reel control cabin, CT stabbing system, platform support gooseneck and a Pan/Tilt/Zoom Closed Circuit video system. The combination of the mentioned equipment allows CT intervention applications to be carried out with minimum equipment on the platform in a safe and secure manner. The system is not only the solution for CT intervention on small offshore platforms but it also saves the rig up/rig down time, therefore minimizing human exposure to equipment handling. The system features improve the overall operation safety and provide an opportunity to perform CT stimulation with large treatment fluid volumes. Fundamentally, this system now forms a key part within an integrated service solution which allows CT services, pumping services, e-line, slick-line and testing services to be performed in a single smooth operation. In Brunei, this technique has now been taken to a new level. The preferred vessel is now a relatively small self-propelled work boat, similar to those used for rig supply, albeit one fitted with a suitable pedestal crane, capable of lifting an injector head and support frame. These work boats allow swift movement between platforms and reduced reliance on support vessels such as tugs, anchor handlers or supply boats. This paper introduces the features and benefits of a CT system which is designed to work from the deck of an anchored work boat and briefly summarizes the success of CT intervention campaigns in Brunei since 2007.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.018 | 0.006 |
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".