1. When milling in drilling applications, it is important to maintain a high mud yield point prior to milling and to start rotating the mill before reaching the top of the fish.
2. Operators should adjust weight on bit and RPM, starting at 70 RPM while monitoring torque, to optimize milling rate for new bits.
3. Keeping high flow velocity ensures turbulent flow for cutting removal to prevent accumulation inside blowout preventers or mills.
4. Operators should record parameters like torque, RPM, pressure, progress, weight, and recovered metals.
1. When milling in drilling applications, it is important to maintain a high mud yield point prior to milling and to start rotating the mill before reaching the top of the fish.
2. Operators should adjust weight on bit and RPM, starting at 70 RPM while monitoring torque, to optimize milling rate for new bits.
3. Keeping high flow velocity ensures turbulent flow for cutting removal to prevent accumulation inside blowout preventers or mills.
4. Operators should record parameters like torque, RPM, pressure, progress, weight, and recovered metals.
Original Description:
Consist of guidelines for milling operations in drilling oil and gas wells
1. When milling in drilling applications, it is important to maintain a high mud yield point prior to milling and to start rotating the mill before reaching the top of the fish.
2. Operators should adjust weight on bit and RPM, starting at 70 RPM while monitoring torque, to optimize milling rate for new bits.
3. Keeping high flow velocity ensures turbulent flow for cutting removal to prevent accumulation inside blowout preventers or mills.
4. Operators should record parameters like torque, RPM, pressure, progress, weight, and recovered metals.
1. When milling in drilling applications, it is important to maintain a high mud yield point prior to milling and to start rotating the mill before reaching the top of the fish.
2. Operators should adjust weight on bit and RPM, starting at 70 RPM while monitoring torque, to optimize milling rate for new bits.
3. Keeping high flow velocity ensures turbulent flow for cutting removal to prevent accumulation inside blowout preventers or mills.
4. Operators should record parameters like torque, RPM, pressure, progress, weight, and recovered metals.
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Milling Applications In Drilling:
1. Keep mud yield point is high enough prior to milling operations
2. Start rotation before the top of fish with a minimum of 3 ft. 3. Adjust WOB & RPM (start with 70 rpm and monitor the torque while increasing RPM ) as you are using a new drilling bit to get the best Milling rate 4. Keep the flow velocity high to have a turbulent flow for cleaning while milling and avoid the accumulation of the cuttings inside important tools such as BOP rams 5. Never to circulate through choke while milling 6. Using Jars in compression will be good while milling to help in case of sudden stuck of the mill. 7. Use ditch magnets on the shaker area to help collect the metal cuttings, keep it always clean & record its weights. 8. If the milling is inside the casing, try to make your oil & gas drilling mud lubricant enough to avoid casing wear. 9. After POOH, if the mill blades have a hook shape, this means the milling is doing good. But if the shape was tapered, it will mean that you applied too much weight which caused wear. 10. Cutting shape is important. As if it was hair-like, it means that weight shall be increased. And if it was fish-like, it will be a good idea to decrease the weight and increase the RPM. 11. You always shall keep a record of the following: 1. torque 2. RPM 3. pump pressure 4. progress made 5. weight on mill 6. Recovered metal weight 7. circulation rate 12. Using non-rotating drill pipe protectors will be useful across build-up and drop-off sections (check also well trajectory calculations) to decrease casing wear. 13. Use drilling stabilizers (above the mill with one or two joints) and it will be great if they have soft blades. Don’t use a lot of centralizers as it may increase the resultant torque.