What is synthetic-based mud?
What is synthetic-based mud?
Synthetic-based drilling mud (SBM) also known as low toxicity oil-based mud (LTOBM) is an invert emulsion mud with synthetic oil as the external phase instead of oil. This has made SBM’s more environmentally acceptable than oil-based muds for use in offshore drilling in spite of the high initial cost.
How do you make drilling mud?
Drilling mud is created by thoroughly mixing water with clay to a desired consistency. Pumping water through the by-pass hose on the 3-way valve and recirculating water back through the pits will help ensure that the clay and water are thoroughly mixed.
What is a polymer based mud?
Polymer drilling fluid or polymer fluid is a type of drilling fluid used to drill through reactive formations where shale inhibition is a prime concern. Frequently used shale inhibitors are salts, glycols, and amines which are not compatible with bentonite.
What is oil based mud made of?
Oil-based mud is a drilling fluid used in drilling engineering. It is composed of oil as the continuous phase and water as the dispersed phase in conjunction with emulsifiers, wetting agents and gellants. The oil base can be diesel, kerosene, fuel oil, selected crude oil or mineral oil.
What is the difference between oil based mud and water-based mud?
Oil-Based muds can be formulated to withstand high temperatures over long periods of time, however, Water-Based mud can break down and lead to loss of viscosity and fluid loss control.
How do you make oil-based mud?
Mixing Oil Base Muds Procedures
- Add the required quantity of base oil to the mixing mud tank.
- Add the primary emulsifier and secondary emulsifier as required.
- Add filtration control additives if required.
- Add lime as required.
- Add required amount of water to the above mixture.
- Add organophilic viscosifier as required.
What chemicals are in drilling mud?
The Components of Drilling Fluids/Mud Water-based drilling mud most commonly consists of Bentonite clay (gel) with additives such as Barium sulfate (Barite), Calcium carbonate (chalk) or Hematite. Various thickeners are used to influence the viscosity of the fluid, e.g. xanthan gum, guar gum, glycol, or starch.
What is the difference between oil-based mud and water-based mud?
How do you make oil based mud?
What are types of mud?
Conclusion
Mud Type | Principal Components |
---|---|
Simple freshwater | Freshwater |
Simple seawater | Seawater |
Spud mud | Bentonite, water |
Saltwater | Seawater, brine or saturated saltwater; saltwater clay, starch, cellulosic polymer |
What is the chemical composition of mud?
Composition
Chemical name | Chemical formula | Percentage composition |
---|---|---|
Hematite (iron oxide) | Fe2O3 | 10–30% |
Silica (crystalline & amorphous) | SiO2 | 5–20% |
Tricalcium aluminate | 3CaO⋅Al2O3⋅6H2O | 2–20% |
Boehmite | AlO(OH) | 0–20% |