1,The total petroleum hydrocarbon content is less than 0.3% after the treatment of oily cuttings
The TPH in the waste residue is 0.04% ~ 0.17%, which all meet the "Control Standard for Pollutants in Agricultural Sludge" (GB4284-84, TPH limit is less than 0.3%).
The residue is up to the “general pollution control standard of industrial solid waste storage and disposal site "(GB18599-2001) Ⅰ, Ⅱclass solid waste technology standard. It is safe to disposal.
2,Proved by third party authority monitoring, waste residue success rate 100% of environmental protection standard.
Drilling cuttings is changed from hazardous waste to general solid waste, one step method achieves resources, reduction and harmless disposal.
3,The recovered oil phase can be fully used to prepare oil-based mud, which has high utilization rate and high added value.
OBM is prepared by recovered oil phase, which has the same performance as the new diesel oil, and can meet the needs of drilling operation.
The oil phase can directly be prepared drilling fluid, and the amount of main additives such as primary and auxiliary emulsifiers can be reduced by 50%.
Comprehensive comparison of technology and economy with other methods:
1,All the waste residue after oil drilling cuttings treatment can reach the national standard.
| Process mode | up to standard | Description |
| RSF CTechnology | TPH＜0.3%、I Class solid waste | discharge directly |
| Cleaning/biochemistry | TPH＜0.3%、II Class solid waste | Long biological treatment cycle |
| （LRET）solvent extraction | TPH＜0.3%、II Class solid waste | The waste residue has solvent residue and VOC pollution |
| Thermal decomposition device | TPH＜0.3%、I Class solid waste | High temperature asphalt and other additives are carbonized into tar，oil phase and waste residue are irritant |
Treatment effect of RSFC technology Treatment effect of Solvent extraction Treatment effect of Cleaning/biological Treatment effect of Thermal decomposition
2,Quality of recovered oil phase and the added value of reuse.
| Process methods | Oil phase | Quality | Added value of reuse |
| Recovery，% | Base oil 5400 CNY | Emulgator 4300 CNY | Filtrate reducer 1800 CNY | Others 400 CNY |
|
|
| RSFC technology | ＞99.7 | √ | √ | √ | Portion | Very good | High |
| Cleaning-Biochemistry | ＞80 | √ | × | × | × | General | General |
| Solvent extraction（LRET） | ＞90 | √ | √ | Portion | × | General | Residual solvent is disadvantageous for liquid distribution |
| Thermal decomposition | ＞90 | Portion | × | × | × | General | Destruction of diesel structure is unfavorable for liquid distribution |
Recycle oil phase Clean and Recycle oil phase Solvent extraction for recycling oil phase
3,The disposal cost is moderate, the whole process is clean and environmental friendly.
| Process method | Process mode
| Cleaner Production |
| RSFC technology | Station/Drilling site | Energy saving，safe，environmental |
| Solvent extraction（LRET） | Station | VOC/volatile gases |
| Cleaning-Biochemistry | Drilling site | Energy saving，safe，producing waste water |
| Thermal decomposition | Station | Tail gas，dust pollution |
RSFC Diagram LRET Device Cleaning device Thermal decomposition
Conclusion:
The research results proves that the oily drilling cuttings RSFC treatment technology has realized one-step treatment of recycling, reduction and harmless , which features with good effect, lower cost, green and environmental protection, and provides a new technology and new method for the green treatment of oil drilling cuttings.It has a broad application prospect.
Industrial application and comprehensive economy evaluation results prove that this technology has a strong market competitiveness. The economic, ecological and social benefits are remarkable through popularization and application,
The application of RSFC in the field of environmental protection of oily sludge, such as drilling cuttings, waste oil-based mud and oil-contaminated soil, will bring great economic, social and ecological benefits.
