𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A bit–rock interaction model for rotary–percussive drilling

✍ Scribed by Franca, Luiz F.P.


Book ID
108148258
Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
771 KB
Volume
48
Category
Article
ISSN
0148-9062

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


A SELF-EXCITED SYSTEM FOR PERCUSSIVE-ROT
✍ A.D. BATAKO; V.I. BABITSKY; N.A. HALLIWELL 📂 Article 📅 2003 🏛 Elsevier Science 🌐 English ⚖ 852 KB

A dynamic model for a new principle of percussive-rotary drilling is presented. This is a non-linear mechanical system with two degrees of freedom, in which friction-induced vibration is used for excitation of impacts, which influence the parameters of stick-slip motion. The model incorporates the f

Seal assembly for a rotary earth drillin
📂 Article 📅 2011 🏛 Elsevier Science 🌐 English ⚖ 131 KB

ary seal assembly. This enables the mechanical seal to be fitted to equipment where the shaft is out of alignment with the equipment casing. This ability to accommodate angular variation can be achieved without any consequential misalignment of the sealing faces of the seal.