Innovative Tool for Coiled-Tubing Depth Measurement Increases Productivity and Minimizes Costs While Improving Accuracy and Safety
Bibliographic record
Abstract
Abstract Traditionally, coiled tubing (CT) counters have been mounted above the injector and typically on a levelwind between the coiled tubing reel and the injector. This tends to expose the coiled tubing counter to vibrations, jerks and slippage as the levelwind traveling head assembly slides from side to side and the coiled tubing is run in to the well or pulled out of the well. As a result of this exposure, the depth measurement accuracy of traditional coiled tubing counters is compromised. In the shallow gas market of the Western Canadian Sedimentary Basin, the error in depth measurements associated with coiled tubing velocity strings has been found to be significant and around 6 metres. Depth confirmation is typically then carried out using slickline. As a result of the error in depth measurement and the additional depth confirmation activity during the installation of the velocity string, the overall job time, the cost of operations and exposure of personnel at the wellsite are significantly increased. Select Energy Systems, Inc in partnership with Count-Rite Oilfield Services, Inc., has developed a length measurement tool for coiled tubing, the SelectRite coiled tubing counter. The SelectRite CT counter is installed below the injector, and field tests have shown that it eliminates the limitations of traditional coiled tubing counters highlighted previously. Data transfer from the counter to the electronic display is wireless. Currently, four operators in Western Canada will not land their velocity strings without using Select Energy's coiled tubing counter. For all these operators, accurate surface depth measurements have been achieved using the counter, thereby eliminating the requirement for additional depth confirmation and related personnel on the jobs. This paper discusses Select Energy's coiled tubing counter which is designed for use with CT outside diameters (OD) of 19.05 mm to 50.8 mm and is currently being used mainly for coiled tubing completions operations in Western Canada.
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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 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.009 | 0.003 |
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".