We put forward a new specialty blasting method to solve drill-jamming based on stress concentration and stress wave theory. Drill-jamming accident of banji was successfully solved at the early 2006 through this method first: for this drill-jamming, study drilling tools and location of drill-jamming to find the weak position (Fig. 1); produce impact loading and form stress concentration (Fig. 3) at weak position by place well-designed explosive package at special position. Through many times controllable safe explosions and repeatedly impact loading, accurate fracture, separate sinker bar and the above parts from drill bit, this part raised up successfully (Fig. 7). The rest would be taken out after second reaming.
Shock Wave Stress Concentration to Solve Large Drill-Jamming Problem
ICCAHE, International Conference on Civil, Architectural and Hydraulic Engineering, 2012 ; 4673-4678
Applied Mechanics and Materials ; 204-208
2012
6 Seiten
Conference paper
English
Geometry of the jamming problem
Tema Archive | 1978
|Stress concentration incorporated fatigue analysis of die-marked drill pipes
Tema Archive | 1999
|Solve unusual lifeboat problem
Engineering Index Backfile | 1924
Dynamic barrier used to solve a large construction dewatering problem
British Library Conference Proceedings | 2003
|Public must solve railroad problem
Engineering Index Backfile | 1932
|