Cutting Efficiency of a Single PDC Cutter on Hard Rock
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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.
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- Genre
- Signal candidat: EmpiriqueSignal consensuel: Empirique
- Score de désaccord entre enseignants
- 0,283
- Score d'incertitude au seuil
- 0,510
- Statut de validation
machine_predicted_unvalidated·codex-gemma-dda1882f352a
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
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| 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 |
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- Écart entre enseignants
- 0,173 · la distance entre les deux têtes enseignantes sur ce seul travail
- Statut de validation
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 découle
Résumé
Abstract Polycrystalline diamond compact (PDC) bits have gained wide popularity in the petroleum industry for drilling soft and moderately firm formations. However, in hard formation applications, the PDC bit still has limitations, even though recent developments in PDC cutter designs and materials steadily improves PDC bit performance. The limitations of PDC bits for drilling hard formations is an important technical obstacle that must be overcome before using the PDC bit to develop competitively priced electricity from enhanced geothermal systems, as well as deep continental gas fields. Enhanced geothermal energy is a very promising source for generating electrical energy and, therefore, there is an urgent need to further enhance PDC bit performance in hard formations. In this paper, the cutting efficiency of the PDC bit has been analyzed based on the development of an analytical single PDC cutter force model. The cutting efficiency of a single PDC cutter is defined as the ratio of the volume removed by a cutter over the force required to remove that volume of rock. The cutting efficiency is found to be a function of the back rake angle, the depth of cut and the rock property, such as the angle of internalfriction. The highest cutting efficiency is found to occur at specific back rake angles of the cutter based on the material properties of the rock. The cutting efficiency directly relates to the internal angle of friction of the rock being cut. The results of this analysis can be integrated to study PDC bit performance. It can also provide a guideline to the application and design of PDC bits for specific rocks. Introduction PDC bits have gained popularity in drilling for petroleum due to its long bit life together with its ability to maintain a high rate of penetration (ROP). The shearing action induced by fixed cutters has shown to be more efficient for penetrating rock than the crushing effect of the teeth or inserts on the rolling cones of a roller bit(1–4). However, PDC bits have traditionally had limitations when encountering hard formations(5). Therefore, PDC bits are not yet preferred for hard formations encountered with mining, petroleum or geothermal energy. Enhanced geothermal energy, i.e., geothermal energy from considerable (+3 km) depths, is seen as one of the promising energy sources in the U.S.(6) Deep continental gas developments also suffer from a low rate of penetration and high bit wear for wells drilled. The objective of this paper is to develop an analytical model to study the cutting efficiency of PDC bits in hard rock formations which can improve the future design of PDC bits and, thereby, improve the cost efficiency of wells in hard formations. PDC Bit Most PDC bits are composed of a hard matrix body which is milled out of a solid block of steel. The matrix body is milled out in such a shape that the bits contain blades where the actual PDC cutters are 'glued' or 'braced' on, and open areas where the cuttings and mud flow can escape to the annulus (Figure 1).
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.
La notice
- Revue
- Journal of Canadian Petroleum Technology
- Thématique
- Tunneling and Rock Mechanics
- Domaine
- Engineering
- Établissements canadiens
- University of Calgary
- Organismes subventionnaires
- non disponible
- Mots-clés
- Rake angleDrillingBit (key)Polycrystalline diamondEfficient energy useRakeMechanical engineeringPetroleum engineeringComputer scienceEngineeringGeologyDiamondMaterials scienceElectrical engineeringMachining
- Résumé présent dans OpenAlex
- oui