at-the-opening (opening only) order

Auto-Opening Window System

casing window-opening

inward opening window

large openning well

V-window opening

well opening sequence

Window Opening

window opening and lateral drilling

Window Opening and Sidetrack Drilling

horizontal well well

Opening-Closing-Opening Test

reform and opening-up; reform and opening to the outside world

window wide window level

window center -window width

All’s well that ends well

be well-fed and well-clothed

DEVIATED WELL AND HORIZONTAL WELL

high deviated well and horizontal well