Technology Focus: Bit Technology and Bottomhole Assemblies (December 2011)
Notice bibliographique
Résumé
Technology Focus The last decade has seen significant change in many areas of the drilling business, particularly with bits and bottomhole assemblies. Rising drilling costs, more-complex and -demanding drilling environments, and the ever-present stimulus of provider competition are continuing to drive improved understanding and decision making in this area. The days when bits were seen as simple commodities, with their leverage on well time and cost unrecognized, are fading. And this is long overdue. Particularly encouraging is the growing use of field-behavior modeling of the bit and drillstring under realistic conditions, and the development of knowledge-based tool-selection techniques, refined by an intensive study of field data. The migration toward deeper or more-tortuous well designs, often accompanied by simultaneous drilling and hole opening in regions in which vibration effects are prolific and are more punishing, is leading to more understanding and rigor. These are admirable trends that more-traditional operations can and should capitalize on, and sometimes are. My learned colleague Graham Mensa-Wilmot wrote of these trends a year ago in this feature, correctly pointing out to us that “We have the key, let’s open the door.” Perhaps we can claim to have done so with some challenges and in some geographical areas (e.g., vibration diagnosis and mitigation in deepwater Gulf of Mexico operations). However, with other equally important challenges (quantitative optimizing of the rate of penetration comes to mind), fundamental understanding and rigorous methods are not so widespread; we are still operating with “pockets of excellence.” So, it is appropriate to lay another challenge to those managing drilling operations and providing drilling services—if your teams are relying on a fuzzy definition of downhole processes or on trial and error to deliver drilling performance, it is time to modernize—let’s have the current pockets of excellence show the rest of us the way. Bit Technology and Bottomhole Assemblies additional reading available at OnePetro: www.onepetro.org SPE 142431 • “A Practical, Application-Based Guide to Borehole-Enlargement-Tool Selection” by J. McCarthy, SPE, National Oilwell Varco, et al. SPE 146732 • “Geosteering With Sonic in Conventional and Unconventional Reservoirs” by Jason Pitcher, Halliburton, et al. SPE 140069 • “Exploration of the Interaction Between Drill-Bit-Gauge Profile and Point-The-Bit Rotary-Steerable Systems” by L.A. Lines, SPE, Weatherford, et al.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,005 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».