The Effect of Drilling Fluid Rheological Properties on Hole Cleaning

Numerical simulation of Taylor Couette flow of Bingham fluids

“…According to Eq. (22), w kmn are assumed to be expanded in both z and  directions with Fourier expansion coefficients W kmn . Thus, W kmn can also be split into two classes (W + kmn , W − kmn ).…”

“…Examples include journal-bearing lubrication, cooling of rotating machinery among others, purification of industrial wastewater, and oil well drilling [21]. The hole cleaning is among the most important problems to handle in drilling operations [22]. Taylor vortices are clearly observed to form under typical drilling rotation rates, and do contribute to lift the mud [23], which generally exhibits a yield stress.…”

Analisa v Slip Pada Sumur Bunyu BSB Dengan Metode Moore

“…Prediksi laju pengendapan ini sulit karena kerapatan stek bervariasi, sifat lumpur berubah, dan rezim rendah di anulus jarang memiliki kecepatan yang seragam. Meskipun banyak persamaan yang tersedia untuk prediksi slip stek, hanya dua yang akan disajikan [5][6] [7], Aliran lumpur dianulus umumnya laminar. Kapasitas angkat cutting dapat ditingkatkan dengan mengubah sifat lumpur sehingga kecepatan keseluruhan lamina lebih sama dari profil yang ditunjukkan pada Gambar 1.…”