9results about How to "Good foam stabilization effect" patented technology

The invention provides a nano foam scrubbing agent suitable for environments with various temperatures and mineralization degrees as well as a preparation method and application of the nano foam scrubbing agent. The nano foam scrubbing agent comprises an anionic surfactant, a nonionic surfactant, a zwitterionic surfactant, foam stabilizing particles and a solvent, the total mass concentration of the anionic surfactant, the nonionic surfactant and the zwitterionic surfactant in the nano foam scrubbing agent is 0.1-1.0 wt%, and the mass concentration of the foam stabilizing particles is 0.1-0.5 wt%; the mass ratio of the anionic surfactant to the nonionic surfactant to the zwitterionic surfactant is (10-30): (15-20): (15-25). The foam scrubbing agent disclosed by the invention has relatively good foaming, foam stabilizing and liquid carrying capacities at 35-95 DEG C in a mineralization degree range of 10000-50000 mg / L, has very good salt resistance and calcium and magnesium ion resistance, and can adapt to environments with various temperatures and different mineralization degrees.

The invention provides a high-strength self-assembly gel foam oil displacement agent and a preparation method thereof, and belongs to the field of chemical oil displacement. The high-strength self-assembly gel foam oil-displacing agent is prepared from the following components: a ternary amphiphilic hydrophobic association copolymer, a zwitterionic surfactant, a nonionic surfactant, heat-resistant polybasic acid, a counter-ion compound, a chelating agent and formation water. According to the self-assembly gel foam oil-displacing agent, quadruple interaction is formed among molecules of all the components, the strength of foaming liquid is remarkably improved, generated nitrogen foam is fine, rich and good in stability, large cracks and karst caves can be blocked in a fracture-cavity type oil reservoir, the swept volume can be effectively enlarged, the crude oil recovery rate of the fracture-cavity type oil reservoir can be remarkably increased, and the oil-displacing effect is good. The foaming agent does not generate precipitates with calcium and magnesium ions, and does not separate out due to salt.

A kind of amphoteric rosin air-entraining agent and its preparation method, the present invention provides the structural formula of the amphoteric rosin air-entraining agent. The preparation method of the amphoteric rosin air-entraining agent comprises the following process steps: adding rosin acid and modifier A into a reactor, using NaF as a catalyst and aluminum oxide as a water absorbent, stirring and reacting at 150-170°C for 8-15h, adding acetone after the obtained material is cooled, stirring, filtering and drying to obtain a solid intermediate product; adding the intermediate product, modifier B and solvent into a reactor, reacting at 75-85°C for 8-15h, distilling off the solvent by reduced pressure after the reaction is completed, adding ethyl acetate, stirring, filtering and drying to obtain the final product, which is the amphoteric rosin air-entraining agent. The present invention has good air entraining performance and gas stabilizing performance, and has better salt resistance, foaming ability and foam stabilizing performance than the existing rosin air-entraining agent, thereby solving the problems of poor stability and poor foaming performance of the rosin air-entraining agent.

The invention discloses a foam workover fluid system and a preparation method thereof. The foam workover fluid system is prepared from a foaming agent, a foam stabilizer, a high-temperature stabilizer, water and the like. The foaming agent is a composition of sodium alpha-olefin sulfonate and sodium dodecyl benzene sulfonate; the foam stabilizer is a composition of xanthan gum and polyacrylamide; and the high-temperature stabilizer is thiourea. The use amount of the foaming agent accounts for 0.50%-0.70% of the mass of the water, the use amount of the foam stabilizer accounts for 0.10%-0.30% of the mass of the water, and the use amount of the high-temperature stabilizer accounts for 0.05%-0.20% of the mass of the water. The method comprises the following steps: adding a foam stabilizer into water at 50-60 DEG C, and uniformly stirring; adding a high-temperature stabilizer, and continuously stirring; and finally, adding the foaming agent and stirring for 30 minutes to obtain the foam workover fluid. The foam workover fluid system has excellent foaming performance and foam stabilizing performance, is low in density, strong in salt resistance and oil resistance and good in high-temperature stability, can effectively reduce the leakage problem in workover operation, meets the requirements of low-pressure oil and gas well workover operation, and is suitable for popularization and application in the low-pressure oil and gas well workover operation.

The utility model relates to the technical field of sprayers, and discloses a foam nozzle for a sprayer, the sprayer comprises an upper pipe body (1), an inner pipe body (2) arranged in the upper pipe body (1), an atomizing nozzle (3) connected with the inner pipe body (2), and a nozzle body (4) detachably arranged on the atomizing nozzle (3), the nozzle body (4) is internally provided with a foam spraying channel and an oil spraying port (5), and the inner pipe body (2) and the atomizing nozzle (3) are detachably arranged on the nozzle body (4). The foam spraying channel comprises a liquid inlet channel (601), a spiral channel (602) and a reducing channel (603) which are communicated with one another in sequence, the reducing channel (603) is communicated with the oil spraying opening (5), and the inner diameter of the spiral channel (602) and the inner diameter of the reducing channel (603) are gradually reduced in the direction towards the oil spraying opening (5) so that foam can be sprayed out; the foam nozzle can be directly installed on an existing sprayer, achieves efficient foam spraying, is simple in structure and can be installed and used at any time.

The invention relates to the field of phosphorite desilicication trapping agents, in particular to a preparation method and application of an acyl quaternary ammonium salt desilicication trapping agent, N, N-dimethyl dodecyl amine and epichlorohydrin react to obtain a compound A, and then N-fatty acylation-O-hydroxypropyl chitosan and the compound A react to obtain the acyl quaternary ammonium salt desilicication trapping agent. The acyl quaternary ammonium salt desilicication trapping agent prepared by the method is suitable for acidic conditions, good in flotation effect, low in cost, low in toxicity, easy to degrade and amphiphilic.

The invention belongs to the technical field of oil exploitation, and particularly relates to a foaming agent for nitrogen foam fracturing and a preparation method and application thereof. The preparation method comprises the following steps: (1) sequentially adding trimethylolpropane tri (3-aziridinyl propionate), an organic solvent and 1-amino-3, 6, 9, 12, 15, 18-hexaoxaheneicosan-21-acid into a reactor, adjusting the pH value to 2-3 by using hydrochloric acid, and carrying out heat preservation reaction; (2) adding alkyl halide into the reactor, adjusting the pH value to 8-9 by using sodium hydroxide, carrying out heat preservation reaction, irregularly detecting the pH value in the reaction process, and maintaining the pH value to 8-9 by using sodium hydroxide; and (3) carrying out reduced pressure distillation on the mixed solution in the step (2) to obtain a viscous solid, and drying to obtain the foaming agent for nitrogen foam fracturing. The foaming agent for nitrogen foam fracturing has the advantages of good foaming and foam stabilizing effects and large liquid carrying capacity.

The application relates to the technical field of fire extinguishing agents, and particularly discloses a foam fire extinguishing agent compounded by anionic Gemini surfactants and a preparation method thereof, which comprises the following components in percentage by mass: 5-15% of anionic Gemini surfactants; 0.5-3% of fluorocarbon surfactants; 3-9% of hydrophilic monomer oligomers; 2-5% of zwitterionic surfactants; 1.0-2.5% of nonionic surfactants; 3-12% of anti-burning agents; 2-7% of cosolvents; and the balance of water. The biodegradable short-chain fluorocarbon surfactants are precisely compounded with anionic Gemini surfactants of specific structures, hydrophilic monomer oligomers and the like, and a preparation process of step-by-step construction is adopted, so that the environmental friendliness is remarkably improved, the performance of the fire extinguishing agent is comprehensively broken through, the water film on the oil surface is ensured to be rapidly spread and rapidly extinguished, the foam covering layer is endowed with super-strong mechanical stability and thermal stability, the anti-reignition time is greatly prolonged, and the purposes of efficient fire extinguishing, long-lasting anti-burning and environmental friendliness are finally achieved.

The invention relates to the technical field of heavy oil reservoir development, and discloses a foam carrying agent for heavy oil steam recovery, a catalytic modification system and application. Wherein the foam carrying agent comprises a foaming agent, inorganic particles and water, the foaming agent is selected from two or more of lauryl glucoside, kochia saponin, tea saponin and Tween 40, and the inorganic particles are selected from one or more of fly ash, sodium bentonite and silicon dioxide. The invention provides a foam carrying agent with good temperature resistance and good compatibility with an oil phase modifier, a foaming agent solution is used as a basis, a certain amount of inorganic particles are added into the foaming agent solution, the viscosity of a foam base solution is enhanced, meanwhile, the mechanical strength of an interfacial film of the foam carrying agent can be enhanced, the foam carrying agent has a good foam stabilizing effect, and meanwhile, the foam carrying agent has good temperature resistance and good compatibility with the oil phase modifier. A certain stabilizing effect is achieved on the oil phase modifier, finally, the foam is in a stable state after making contact with the oil phase modifier, and the purpose of strengthening the temperature resistance is achieved.