The Drilling Construction Steps Include Several Section-Pull In Hole and Pull Out Hole

The Drilling Construction Steps Include Several Section-Pull In Hole and Pull Out Hole

2. Pull In Hole and Pull Out Hole

Pull In Hole: In order to replace a blunt drill bitDrill Bit, or to prepare for core sampling, repair equipment, or to do other work in the well, the drill and drill bit need to be lifted to the ground, and then the blunt old drill bit is removed, and the newly selected new drill bit is connected, and then the drill is lowered to the original well bottom in the reverse order of the drilling.

Pull Out Hole: The deeper the well is, the more time it takes to drill and drill. The actual drilling time is relatively reduced. Therefore, how to choose a good drill bit to increase the progress of drilling, reduce the number of drilling and drilling, and shorten the construction period is also the responsibility of engineers.