52results about How to "Long period of action" patented technology

The invention belongs to the technical field of tertiary oil recovery and particularly relates to a method for extracting oil in single well steam stimulation by combining microorganisms and CO2 in the heavy oil well. The method comprises the following steps: (1) screening test oil wells; (2) screening microorganisms and nutrients thereof; (3) injecting the microorganisms and the nutrients thereof into the stratum of the test oil well; (4) injecting liquid CO2; (5) shutting the test oil well down; (6) opening the test oil well for production. The method disclosed by the invention has the advantage of wide application range and is simple in process implementation; oil well sand production and sleeve damage situations are avoided and the oil well utilization rate is high; the thickened oil viscosity can be greatly reduced, the oil-water interfacial tension is reduced, the stratum energy can be effectively replenished, the characteristics of long action period, remarkable enhanced production effect of oil, and the like are achieved, and therefore, the method is an economic and effective method for increasing the yield of the heavy oil well and can be widely applied to a single well steam stimulation technology of the heavy oil well.

The invention discloses a solid slow-release scale inhibitor and a preparation method thereof, and belongs to the technical field of oilfield auxiliary agents. A purpose of the invention is to solve the problems of a certain corrosivity to wellbore, short action period, high cost and the like of the scale inhibitor. According to the method, a quadripolymer is subjected to blending modification with organic attapulgite to obtain a solid slow-release scale inhibitor capable of effectively inhibiting formation and deposition of wellbore scale in an oil extraction process, greatly reducing the regular scale removal period of a wellbore, reducing the oil extraction cost and ensuring the safe and stable operation of an oil well. According to the invention, organic nano-clay is applied to the solid slow-release scale inhibitor, so that the stability and the mechanical strength of the solid slow-release scale inhibitor can be effectively improved, and the action period of the solid slow-release scale inhibitor is effectively prolonged.

The invention provides an immune-enhancing antineoplastic collagen composition as well as a preparation method and an application thereof. The composition is characterized by consisting of antineoplastic factors, collagen, polysaccharide substances and active factors. The composition is applicable to, but not limited in, cells for treating breast cancer, colorectal cancer, ovarian cancer, pancreatic cancer, prostatic cancer, bladder cancer, melanoma, lung cancer, stomach cancer, liver cancer, head and neck squamous cell carcinoma, carcinoma of uterine cervix, renal cell carcinoma, thyroid cancer, acute myeloid leukemia, myeloma, esophageal squamous cancer, lymphoma and the like.

The invention discloses a method for treating persistent halogenated hydrocarbons in soil by a slow-release compound remediation agent. The method includes steps: pre-ploughing contaminated soil, directly spreading a certain quantity of the slow-release compound remediation agent into ploughed soil, harrowing to well mix, watering to keep certain moisture content, and covering the soil surface with a protecting layer to realize anaerobic reduction dehalogenation reaction, wherein spreading quantity of the remediation agent is 0.05-1.5% of the dry weight of the contaminated soil, the soil ploughing depth is 25-40cm, the soil moisture content is adjusted to 50-80% of maximum field moisture capacity after spreading of the remediation agent, and remediation treatment time is 30-350d. The remediation method takes advantages of great adsorption performance of black charcoal, efficient chemical reducibility of nano zero-valence metal and dissimilatory iron reduction dehalogenation performanceof functional microorganisms to achieve physical, chemical and biological synergistic remediation effects on persistent halogenated hydrocarbon contaminated soil and has advantages of long action period, structural stability, low cost, environmental friendliness and the like.

The invention discloses a sustained-release composite remediation agent for treating persistent halogenated hydrocarbon in groundwater and a preparation method thereof. The preparation method comprises the following steps: 1) preparing bacterial liquid saturated black carbon; 2) preparing a colloidal solution A containing locust bean gum and an organic carbon source; 3) preparing a colloidal suspension B containing locust bean gum, an organic carbon source, a nano-scale zero-valent metal and the bacterial liquid saturated black carbon; 4) carrying out a crosslinking reaction for 2-6h; and 5) carrying out a delayed crosslinking reaction for 2-6h to obtain a sustained-release composite remediation agent for treating persistent halogenated hydrocarbon in groundwater. The sustained-release composite remediation agent prepared by the method provided by the invention can utilize the good adsorption performance of black carbon, the high-efficiency chemical reducibility of the nano-scale zero-valent metal and the dissimilation iron reduction dehalogenation capability of functional microorganisms to achieve the physical, chemical and biological synergistic remediation effect of persistent halogenated hydrocarbon polluted groundwater, and has the advantages of long action period, stable structure, low cost, environmental friendliness and the like.