34results about How to "Temperature resistance" patented technology

A hot melt adhesive for use on porous substrates, wherein the hot melt adhesive hasa) about 10% to about 70% by weight of a polypropylene homopolymer having a DSC melting point of less than 100° C.;b) about 10% to about 60% of a first tackifying resin having a Ring & Ball Softening Point of about 95° C. to about 140° C.;c) about 0% to about 65% of a second tackifying resin that is different than the first tackifying resin;d) about 5% to about 50% of a plasticizer;e) about 1% to about 40% by weight of a secondary polymer which is either a semi-crystalline polymer or wax with an enthalpy of fusion of greater than 30 Joules / gram;f) about 0.1% to about 5% of a stabilizer or antioxidant;wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 centipoise (cP) at 163° C. (325° F.).

A high-strength temperature-resistant viscoelastic polymer for profile control, which is characterized in that the proportion of the polymer is: the proportion of each raw material in parts by mass, 5-60 parts of acrylamide; 2-acrylamide-2-methyl- 5-55 parts of 1-propanesulfonic acid; 2-15 parts of 2-acrylamido dodecanesulfonic acid; 0-3 parts of acrylate; 0-3 parts of N-vinylamide; 1-5 parts of cationic monomer; 0.01-1 part of solubilizing agent; 25-55 parts of deionized water; the present invention has the following advantages: one is classic reaction: it is easy to realize industrial production; the other is higher yield: the total yield reaches more than 90%; The synthetic raw materials and process routes of polymer-like polymers are environmentally friendly, have low environmental toxicity, good biodegradability, excellent salt resistance, and temperature resistance. Stability is better than ordinary polymers.

A hot melt adhesive for use on porous substrates, wherein the hot melt adhesive hasabout 10% to about 70% by weight of a polypropylene homopolymer having a DSC melting point of less than 100° C.;about 10% to about 60% of a first tackifying resin having a Ring & Ball Softening Point ofabout 95° C. to about 140° C.;about 0% to about 65% of a second tackifying resin that is different than the first tackifying resin;about 5% to about 50% of a plasticizer;about 1% to about 40% by weight of a secondary polymer which is either a semi crystalline polymer or wax with an enthalpy of fusion of greater than 30 Joules / gram;about 0.1% to about 5% of a stabilizer or antioxidant; wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 centipoise (cP) at 163° C. (325° F.).

The invention discloses a high temperature resistant organic zirconium crosslinking agent and a preparation method thereof. The crosslinking agent is prepared from an inorganic zirconium salt 5%-10%, a polyhydric alcohol 5%-15%, sodium hydroxide 10%-20%, an organic ligand 5%-10%, a complex crosslinking agent 1%-5%, and a heat temperature stabilizer 1%-5% in a water solution. The invention also discloses a fracturing fluid gel prepared from the high temperature resistant organic zirconium crosslinking agent and its preparation method. The fracturing fluid gel is prepared from the high temperature resistant organic zirconium crosslinking agent 0.15%-0.45%, a polyacrylamide thickener 0.3%-0.6%, potassium chloride 0.5%-1%, a temperature stabilizer 0.1%-0.3%, a cleanup additive 0.8%-1.5% and an anti-swelling agent 1.5%-2% with water as a solvent. The high temperature resistant organic zirconium crosslinking agent is suitable for fracturing transformation of an oil reservoir with main characteristics of deep layer, high temperature and low permeability, not only can obviously improve temperature resistance and shearing resistance of a fracturing fluid gel system, but also has a crosslinking delaying performance. And the fracturing fluid gel formed by crosslinking at a temperature of 180-200 DEG C with the polyacrylamide is stable in gel performances, good in temperature resistance and shear resistance, good in hydraulic fracturing effect, and can meet fracturing operation requirements.

The present invention relates to the field of fracturing fluid for oil and gas field reconstruction, in particular to a fracturing fluid stock solution and its preparation method, acidified fracturing fluid, resistance-reducing water and sand-carrying fracturing fluid, wherein the fracturing fluid emulsion is formed by emulsion polymerization, and the The emulsion is formed by mixing the water phase and the oil phase; the acidified fracturing fluid consists of 1.0-2.0% of the emulsion, 1-1.5% of the corrosion inhibitor, 0.5-1% of the iron ion stabilizer, 0.1-0.3% of the acid drainage aid, Made of 10-30% acid and the balance of water, the emulsion is the fracturing fluid stock solution; the resistance-reducing water is composed of 0.04-0.12% of the emulsion, 0.1-0.2% of the drainage aid, 0.2-0.5% of the anti-swelling agent and the balance The sand-carrying fracturing fluid is made of emulsion 1-2.5%, anti-swelling agent 0.2-0.5%, drainage aid 0.15-0.4% and the balance of water. The fracturing fluid stock solution, acidified fracturing fluid, anti-resistance water or suspended sand fracturing fluid of the present invention require different fracturing fluid emulsions, and the on-site construction can adjust the formula at any time according to the actual situation. Good demulsification performance, simple production process, low cost, outstanding temperature resistance and salt resistance.

The invention relates to a gemini amphiphilic surfactant as well as a preparation method and application thereof. The preparation method comprises the following steps of: adding n-octadecylamine and 3-chloro-2-hydroxy propyl sulfonic acid sodium of which the amount ratio is 1:(1.2-1.3) into a solvent containing a phase transfer catalyst to perform heating and refluxing, and standing for a night; adding a pH regulator into a reaction generated solution, adjusting the pH value of the system to be 8-9, and adding 1,2-dichlorethane, wherein the added amount of the 1,2-dichlorethane is metered according to the amount ratio of the n-octadecylamine to the 1,2-dichlorethane of 2:1 to 5:2; heating, refluxing, and standing for a night; and removing the solvent from the reaction generated solution through reduced pressure distillation to obtain the gemini amphiphilic surfactant. The gemini amphiphilic surfactant is used by compounding with sec-alkyl sodium sulphonate and sorbitol anhydride single oleate, the mineralization degree of the surfactant at 60 DEG C reaches 50000mg / L, and the interfacial tension with crude oil can reach 10<-3>mN / m, so that the crude oil recovery ratio can be effectively improved.

The invention belongs to the technical field of development of oil fields, and particularly relates to a seawater-based fracturing fluid which is suitable for preparing sweater and can be used for realizing continuous blending and a preparation method thereof. The seawater-based fracturing fluid is prepared from the following raw materials in part by weight: 0.5-1.5 parts of thickening agent, 0.3-1.0 parts of crosslinking agent, 0.2-0.6 parts of surfactant, 0.01-0.2 parts of pH value regulating agent, 0.01-0.2 parts of viscosity breaker, 46.5-64 parts of seawater and 35-50 parts of desalted seawater. The seawater-based fracturing fluid has the advantages of suitability for preparing seawater, capability of realizing continuous blending, high temperature resistance, high salt resistance, high shear resistance and quick dissolvability.

The invention discloses a temperature-resistant, salt-resistant, high-expansion plugging agent for sealing large cracks and a preparation method thereof. The agent system is composed of the following components in mass percentage: main agent 6%-10%, crosslinking agent 0.6% ~1%, initiator 0.006%~0.01%, additive 6%~14%, all the other are water; The preparation method provided by the invention comprises the following steps: adding montmorillonite to water to prepare montmorillonite dispersion system; Add the crosslinking agent and initiator to the montmorillonite dispersion system to prepare the main agent solution; put the main agent solution in an oven at 90-120°C to make it gel for 9-48 hours, and the gelling strength of this agent system can reach H level. The expansion multiple is 50-80 times, the strength after expansion is good, and the water shutoff effect is good under the conditions of 140°C and salinity of 250,000. The present invention is suitable for profile control and water shutoff in high temperature and high salt reservoirs to seal large fracture water channeling channels Operation.