Research Regarding Drilling Masts Reliability under the Combined Action of the Wind and the Hook Load

Portable masts are parts of mobile servicing rigs designed to work at drilling or extraction wells and are made of three sections: fixed section, lower section and upper section. During transportation, the mast is placed in a horizontal position on a truck chassis, with the upper section nested inside the lower section. Before putting into service the mobile servicing rig, the lower and upper sections are erected as a unit, in a slightly inclined position. In this paper, the authors present the results of a research regarding the safety in functioning for such a mast which is under the action of the wind with high velocities. The wind’s action direction with respect to the mast is analyzed in two cases: front-back and lateral, with stress and strain values that occur.