کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8912247 | 1639326 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influences of bit profiles on possible fracture modes
ترجمه فارسی عنوان
تاثیرات پروفایل های بیت در حالت های شکستگی احتمالی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
چکیده انگلیسی
The influence of different bit profiles on possible fracture modes was investigated using Finite Element Method. The International Association of Drilling Contractors (IADC) classification was used to design 14 types of profiles. The formation model was built, with given bit size, formation properties, meshing method and boundary conditions, etc. Moreover, the pseudo-static state and mass scaling were used to reduce the simulation time and increase the simulation accuracy. The simulation results showed that, for nine common bit profiles, larger cone height led to larger area of high stress zone, and the gauge height was not apparently related to the stress generated. When the gauge height decreased, the high stress zone turned from the nose and center to the gauge zone. For the non-common bit profiles, the convex bit produced larger high stress field, and the pilot section bottom of bicentre bits had concentrated stress. Fractures were created in the gauge zones and noses, and the bits with larger cone height and gauge height induced longer vertical fractures. The flat and convex bits did not generate longer vertical fractures. The bicentre bit can hinder the vertical fractures in the gauge zone, but enables the horizontal fractures easier. The bit with intermediate reamer has less damage to sidewall.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Petroleum Exploration and Development - Volume 44, Issue 4, August 2017, Pages 667-674
Journal: Petroleum Exploration and Development - Volume 44, Issue 4, August 2017, Pages 667-674
نویسندگان
Seyed Ali HEYDARSHAHY, Shivakumar KAREKAL,