Application of Down-hole Screw-type Pressure Intensifier for ROP Enhancement
Bibliographic record
Abstract
Abstract Down-hole Screw-type Pressure Intensifier is a new ROP enhancement device, using helicoid hydraulic motor as the power. It can convert the rotation movement of the helicoid hydraulic motor into the reciprocating movement of the piston pump through a special spiral cant type reversing mechanism, thus some part of the total drilling fluid can be pressurized to more than 100 MPa and erupt out from the ultra high pressure nozzles installed in PDC bit. The high pressure water assisting the rock breaking was implemented by this device and the rock breaking efficiency was improved. This new down-hole pressure intensifier has been tested and used in 2 wells situated in Jilin oilfield, Songliao basin. The hole depth was from 1967m to 2355m, and the bit size was 9-1/2in. The Down-hole Screw-type Pressure Intensifier worked for 70hrs, and increased the rate of penetration by 52.4% and 95.3% compared with the adjacent wells. Result of the applications shows that the Down-hole Screw-type Pressure Intensifier is structured reasonably, be cable of working for more than 100hrs and has increasd the rate of penetration remarkably. The success of this tool's field application might provide a way to increase the rate of penetration in hard and complex layers, shorten well construction period, and reduce the drilling cost.
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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 | 0.000 |
| 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 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".