A high temperature and salt resistant polymer, its preparation method and application

A technology of polymer and high temperature resistance, which is applied in the direction of drilling compositions, chemical instruments and methods, etc. It can solve the problems of loss of viscosity increase and viscosity drop of polymer solution, and achieve good temperature and salt resistance and excellent polymerization ability. Strong, the effect of improving rigidity

Active Publication Date: 2022-03-25
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a monomer additive, alkyl-like substituted acrylamide can effectively improve the high temperature resistance of polymers. However, due to the flexible molecular chain segment of alkyl-like substituted acrylamide, it is more affected by temperature changes. In high-temperature, high-salinity brine In the middle, the molecular chain curls up, the viscosity drops significantly, and the viscosifying effect of the polymer solution is obviously lost.

Method used

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Comparison scheme
Effect test

preparation example Construction

[0034] The present invention provides a method for preparing an anti-high temperature resistant salt polymer, comprising the steps of:

[0035] Step 1, 10 ~ 20 parts of the high-efficiency resistant resistant salt monomer, 100 to 150 copies of acrylamide, 5 to 10 sodium acrylate, 2-acrylamide-2-methylpropulfonic acid, 5 to 120 parts, light 0.3 ~ 0.5 parts, thermal initiator 0.08 ~ 0.1 parts, polymer branching agent 0.02 ~ 0.05 parts, polymer stabilizer 4 to 6 parts, nanochemical 4 to 6 parts of the reactant stirred solution;

[0036] Step 2, open the nitrogen valve diafurn nitrogen by oxygen for 20 to 30 minutes while opening the cooling saline. Slow stir until the dissolution is uniform;

[0037] Step 3, when the material temperature in the reactor is lowered to 5 to 6 ° C, the stirring is stopped, the polymer lamp is opened, and the light is polymerized for 1 to 2 hours, and the platen is placed in the kneading groove;

[0038] Step 4, after 10 minutes, then feed the product of ...

Embodiment 1

[0056] 16.5 parts of the high-efficiency resistance to salt monomer (8.5 parts of N'N-dimethylamidol monomer; N'N-dimethyridol monomer), 160 parts of acrylamide, 2-acrylamide-2- 110 sulfonate, 8 parts of acrylate, 5 parts of high methyl etherified melamine resin, 0.03 parts of polymer branching agent N'N-methylene double acrylamide, 5 nanochemical, 5 parts, light 2,2'-azo diisobutyl dihydrochloride and 2,2'-azo [2- (2-imidazoline-2-yl) propane] dihydrochloride is a total of 0.4 parts and thermal initiation A total of 0.09 serial sulfate and petrophenylpanoyl is added to the reactor, and the stirring dissolution is uniform. When the cooling brine is cooled, the cooling is cooled, and after 30 minutes of nitrogen in the reactor, when the reaction kettle temperature is lowered to 6 ° C, the stirring is stopped, and the nitrogen gas tube is adjusted to the liquid surface and the flow rate is 0.8 / min. The reaction ends. Open the aggregate lighting for 1.5 hours, input the polymerized...

Embodiment 2

[0058] 18 parts of the high-efficiency resistant resistant salt monomer (9 parts of N'N-dimethylamidamide monomer; 9 parts of N-vinylpyrrolidone monomer), 150 copies of acrylamide, 2-acrylamide-2- 120 sodium methylcyl sulfonate, 6 parts of methyl etherified higha amino polyhydroid resin, 0.04 parts of polymer branching agent N'N-methylene double acrylamide, 4 nanochemical, photoinitiator 4, 4'-azo bis (4-cyanoetanic acid) and azobisopropylimidazoline hydrochloride hydrochloride have a total of 0.08 potassium sulfate and ammonium sulfate to add 0.08 parts of ammonium sulfate to start stirring. Dissolved dispersion is uniform. When the cooling brine is cooled and cooling, and after 30 minutes of nitrogen in the reactor, the mixture is stopped at 5 ° C, and the nitrogen gas is adjusted to the liquid surface and the flow rate is 0.8 / min. The reaction ends. Open the aggregate lighting for 1.5 hours, input the polymerized rubber block to the kneading tank, then fleate the pinching rub...

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PUM

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Abstract

The invention discloses a high-temperature and salt-resistant polymer, its preparation method and application, and belongs to the field of high molecular polymer preparation. Using aqueous solution free radical polymerization, photoinitiation system, copolymerization with acrylamide, sodium acrylate, 2-acrylamide-2-methylpropanesulfonate sodium in aqueous solution, polymer stabilizer, polymer branching agent added at the same time, Nano-cellulose co-solvent; after polymerization, it is granulated and dried to obtain high-temperature and high-salt anionic polyacrylamide fluid loss reducer. The anti-high-temperature and anti-high-salt polymer fluid loss reducer prepared by the present invention has the following characteristics: high-efficiency viscosity increasing, good temperature resistance, salt resistance, good water solubility and stability including shear stability, chemical stability Sex, thermal stability, salt stability, biological stability, long-term stability.

Description

Technical field [0001] The present invention belongs to the field of preparation of a polymer polymer, in particular a resistance to high temperature resistant and salts polymers, a preparation method and application thereof. Background technique [0002] Commonly used antimony-free polymer filter dosage is mainly anionic polyacrylamide (APAM) and its derivatives. APAM is hydrophilic, easy to form hydrogen bonds with water, is soluble in water, and has a large hydrodynamic volume after hydration, which acts as a tackifying effect, electrical repellency between molecular chains, and makes molecular chain stretch, A larger hydraulic volume can be obtained. However, since the molecular chain is a flexible chain, in the aqueous solution as a random coach conformation, in the high temperature, high mineralization degree of salt water, the molecular chain occurs, the viscosity is greatly reduced, and the polymer solution is significantly adhered to the polymer solution. And the flexibl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F251/02C08F220/56C08F220/58C08F220/06C08F220/54C08F226/10C08F222/38C09K8/035
CPCC08F283/002C08F251/02C09K8/035C08F220/56C08F220/585C08F220/06C08F220/54C08F226/10C08F222/385
Inventor 杨开吉马勇王勤吴江勇魏星光
Owner JIANGSU FEYMER TECH
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