A study of flow rate effects in drilling with embedded diamond coring bits, and the commissioning of a cerchar rock abrasivity tester
Bibliographic record
Abstract
The research is composed of two separate efforts. First, a study of the effect of flow rate of drilling fluid on the drilling performance of two-inch coring bits; and second, the commissioning of equipment for the CERCHAR rock abrasiveness test. CERCHAR is a standard test to determine a measure of rock abrasiveness based on the wear flat that the rock produces on the tip of a scratching tool. -- In the drilling tests the primary variables were the flow rate and weight on bit and also the drilling modes (vibration assisted and conventional). The bits were impregnated diamond coring bits and wear measurements were based on both microscopic photos of the bit surface and the diamonds and on the weight loss of the tool. The results show an overall increase of the rate of penetration for vibration assisted drilling compared to conventional drilling and also the boosting the effect of the flow rate on this increase in the rate of penetration. -- A previously constructed CERCHAR testing facility was commissioned, including the determination of the appropriate heat treatment of the tool steel chosen for the styli. The effect on the CECHAR Abrasiveness Index (CAl) of stylus hardness within the range of hardness of ±2HRC about the hardness stipulated in the standard is within the confidence limits for a CAl determination.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".