Abstract: Systems and methods are discussed herein for an optimal approach for wireless emergency alerting within cells of wireless communication networks by using a careful estimation of a “true effective radius” of each cell/sector to eliminate broadcasts falling short of alert area boundaries (with users in such gaps in coverage not receiving an alert despite being in the designated alert area). By utilizing true provisioning information of each cell/sector that is at least partly within the alert area boundaries to understand the true effective radii of particular cell sectors can be selected for broadcast of the alert such that the entire alert area is covered for broadcasting of the alert without excessive over-broadcasting, e.g., broadcasting excessively beyond the alert area boundaries. Alerts can then be broadcast within each selected cell sector.

Abstract: Systems and methods are discussed herein for an optimal approach for wireless emergency alerting within cells of wireless communication networks by using a careful estimation of a “true effective radius” of each cell/sector to eliminate broadcasts falling short of alert area boundaries (with users in such gaps in coverage not receiving an alert despite being in the designated alert area). By utilizing true provisioning information of each cell/sector that is at least partly within the alert area boundaries to understand the true effective radii of particular cell sectors can be selected for broadcast of the alert such that the entire alert area is covered for broadcasting of the alert without excessive over-broadcasting, e.g., broadcasting excessively beyond the alert area boundaries. Alerts can then be broadcast within each selected cell sector.

Abstract: Methods and apparatus are provided for draining or removing well fluid from a production tubing string into a well borehole while pulling the tubing string from the well. A special length of tubing is provided near the lower end of the tubing string with a drain port communicating the interior and exterior of the tubing. The drain port is initially plugged and sealed with a knock out plug. When it is desired to remove the tubing string from the well and drain its fluid into the borehole, a drop sleeve is dropped from the surface to shear and open the knock out plug. A sleeve stop catches the drop sleeve for re-use.