Function: This tool is used to grind top of fish, junks under well and stuck tools.
Applicable documents: SY/T5067-91
Operational process
Check the concave mill first, the size of milling alloy had better be 2-3mm. than. Abut 2-3 drill collar or device for saving the annular tube. Please lay the concave mill slowly to avert concaving the annular tube.
Put on the pump and clean well when the concave mill down 1-2M to the well, then lay it down by rotate speed 70～100/min, pressurize 20-40kn gradually when tight pull. Set the delivery capacity based on the annular capacity, deep of grinding and the performance of work over, ensure picking to the ground.
When the power torque decrease, the grinding cutting blade my be blunt . You can pick up the tube a little, lay down to cut a new cutting blade. If not, please pull out and change the mill. If it is not advanced or restraining, or astern seriously, please analyze causes in time, and think what to do next.
If it is not advanced or restraining, skip or astern seriously, please case study in time, and think what to do next.
The type and main parameter of milling shoe
|
Type |
mm |
Button type |
Use standard |
|
MP-（105-115）-01 |
Φ105-115×220 |
NC31 |
As a standard for every 1mm |
|
MP-（116-137）-02 |
Φ116-137×260 |
NC31 |
As a standard for every 1mm |
|
MP-（138-150）-03 |
Φ138-150×260 |
NC31 |
As a standard for every 1mm |
|
MP-（90-100）-04 |
Φ90-100×220 |
NC26 |
As a standard for every 1mm |
