Surface testing a Section Mill before RIH to create a window inside a 9 5/8″ #casing, during a P&A program that has a micro annulus in the B-annulus.
Mill is designed for milling tubular fish, cleaning a casing internal diameter before running a casing patch and suppressing the damaged parts of a casing.
Mill can be perfectly directed into the fish head, avoiding side tracking. The pilot is hardfaced for optimum resistance to wear and enables perfect, smooth guiding of the milling blades.
These downhole tools can be hardfaced with your choice of TOPLOY (tungsten carbide grains) or cutting inserts : TOPMILL (square) or SWORDFISH (shaped). Inserts enable better ROP and tool life.
All features (pilot diameter, fishing neck, number of blades, etc.) can be customized to your exact needs.
◾️Section milling advantages are:
- Sidetracks can kick off in any direction.
- Lower dog leg severity is created.
- Less eqiuipment is required for remote locations.
- A smoother exit from old well bore is created.
◾️The disadvantages to section milling are:
- Mud properties must be altered.
- Sweeps must be prepared.
- Higher volumes of steel and cement must be handled.
-Bird nesting downtime is a possiblity.
-A cement plug must be set in order to kick-off.