Rolling Depth-Of-Cut Control Improves Tool-Face Control and Overall ROP During Steerable Motor Applications
Notice bibliographique
Résumé
Abstract Rolling depth-of-cut control (RDOCC) on fixed cutter drill bits can improve rate of penetration (ROP) and reduce vibrations during steerable motor applications by reducing torque fluctuations caused by sliding friction. Torque fluctuations are reduced by absorbing weight-on-bit (WOB) variations using a rolling bearing element, without generating additional torque that leads to tool-face control issues. Laboratory testing validated RDOCC efficiency compared to traditional depth-of-cut control limiters (DOCLs) by evaluating frictional force, load, and material resistance to axial and lateral forces. At the field level, potential applications, where tool-face control was identified as a drilling performance limiter, were analyzed and selected for the initial field tests. Baseline performance and target depth of cut (DOC) were determined using foot-based data. Additional drilling parameters, such as WOB, torque, and vibration, were analyzed to measure the RDOCC influence on drilling performance. The vibration data were recorded using an at-bit data collection device (ABDCD) and later compared to data from bits with traditional DOCLs. Modified bit designs that included RDOCC with rolling elements on three blades to engage at the target DOC were run in the selected applications and results compared to historical data, performance, and dull bit condition. In southeastern Saskatchewan, Canada, the curve section of Bakken wells experienced overall ROP improvement and reduced vibrations at the bit, as indicated by improved dull condition and ABDCD data. Five consecutive field record runs were achieved using bits equipped with RDOCC technology. In McKenzie County, North Dakota, USA, direct comparisons between polycrystalline diamond compact (PDC) bits with RDOCC and those with traditional DOCLs show a 39.5% reduction in hours or better to drill the curve section from 10,300 to 11,100 ft measured depth (MD) on the same pad site. The improved tool-face control allowed higher WOB application from a lower inclination through landing the curve, thereby improving ROP throughout the run. In the Wadi Rafash Field, northern Oman, a PDC bit with RDOCC drilled the curve section, improving dogleg severity (DLS) by 45%, ROP by 23% and reducing distance by 30% over the average offset performance in the field. The novelty of the RDOCC is the ability to absorb WOB fluctuations without creating large torque fluctuations that inhibit tool-face control. By maintaining a consistent tool face, operators and directional drillers can apply more energy to the system, resulting in overall higher ROP.
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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) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| 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 ».