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Polyacrylamide inorganic nano composite drilling fluid aid and preparation method thereof

A polyacrylamide, composite technology, applied in chemical instruments and methods, drilling compositions, etc.

Inactive Publication Date: 2010-09-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the technology of utilizing polyacrylamide and the inorganic phase of specific structure to carry out organic-inorganic polymerization reaction has not been reported yet, especially there is no report on improving the temperature and salt resistance of polyacrylamide by using the organic-inorganic polymerization composite method.

Method used

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  • Polyacrylamide inorganic nano composite drilling fluid aid and preparation method thereof
  • Polyacrylamide inorganic nano composite drilling fluid aid and preparation method thereof
  • Polyacrylamide inorganic nano composite drilling fluid aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 0.08mol magnesium nitrate and 0.04mol aluminum nitrate were dissolved in 350ml distilled water. Dissolve 0.08mol sodium hydroxide and 0.08mol acrylic acid in 400ml distilled water, add nitrate solution dropwise at room temperature, adjust the pH value to about 10 with 3mol / L sodium hydroxide solution, and add 0.8g Coupling agent KH-151 was treated at 50°C for 5 hours to obtain inorganic phase suspension A

[0029] Add 50g of acrylamide and appropriate amount of water into the reactor to dissolve. Add 14wt% (acrylamide weight percentage, the same below) sodium carbonate, 6% sodium bicarbonate, 3% urea, 0.4% N,N'-tetramethylethylenediamine and appropriate amount of water to dissolve and stir evenly. Add the above-mentioned inorganic phase suspension A accounting for 1% of the mass of acrylamide monomer, stir and mix well, cool to about 10°C, add 0.2% ammonium persulfate and 0.2% sodium sulfite, and wait for the polymerization reaction to proceed until the temperature of ...

Embodiment 2

[0031] Add 50 g of acrylamide into the reactor, and add an appropriate amount of water to dissolve it. Add 14wt% (acrylamide weight percent, the same below) sodium carbonate, 6% sodium bicarbonate, 3% urea, 0.4% N,N'-tetramethylethylenediamine in sequence, add an appropriate amount of water to dissolve and stir evenly. Add the inorganic phase suspension A in Example 1 accounting for 3% of the mass of acrylamide monomer, stir and mix well, cool to about 10°C, add 0.2% ammonium persulfate and 0.2% sodium sulfite, wait for the polymerization reaction to proceed After the temperature of the system no longer rises, keep the temperature at 60°C for 2 hours, and hydrolyze at 100°C for 3 hours. Finally, the colloid was taken out and diced, dried at 85° C., and pulverized to obtain polyacrylamide nano-composite powder, and the size of the inorganic dispersed phase was 30-70 nm.

Embodiment 3

[0033]Add 50 g of acrylamide into the reactor, and add an appropriate amount of water to dissolve it. Add 14% (weight percentage based on acrylamide, the same below) sodium carbonate, 6% sodium bicarbonate, 3% urea, 0.4% N, N'-tetramethylethylenediamine in sequence, add appropriate amount of water to dissolve and stir uniform. Add the inorganic phase suspension A in Example 1 accounting for 5% of the mass of acrylamide monomer, stir and mix well, cool to about 10°C, add 0.2% ammonium persulfate and 0.2% sodium sulfite, wait for the polymerization reaction to proceed After the temperature of the system stops rising, keep the temperature at 60°C for 2 hours, and then hydrolyze at 100°C for 3 hours. Finally, the colloid was taken out and diced, dried at 85° C., and pulverized by a pulverizer to obtain a polyacrylamide nanocomposite material.

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Abstract

The invention discloses a polyacrylamide inorganic nano composite material prepared by adopting a polymerization composite method of polyacrylamide and nano inorganic phase and a drilling fluid aid. The inorganic material is nano dispersed suspension formed by co-precipitation hydrothermal reaction and surface treatment reaction of laminated silicate, nitrate or the both. The suspension is mixed with acrylamide aqueous solution, cosolvent and complexing agent; and the mixture is polymerized under the initiation of persulfate and sulfite to form the polyacrylamide nano composite material with proper molecular weight, good water solubility and good tackifying effect, wherein the dimension of the inorganic phase is 30 to 70 nanometers. The drilling fluid prepared from the composite material has remarkable viscosity increment, good rheological property and filtration control, temperature and salt resistance and protection property on a reservoir layer, and improves the yield and recovery rate.

Description

technical field [0001] The invention relates to a preparation method of a polyacrylamide composite material, in particular to a preparation method of a polyacrylamide inorganic nanocomposite material and a drilling fluid additive thereof, and belongs to the field of nanocomposite preparation and drilling fluid for oil and gas drilling. Background technique [0002] In oil drilling engineering, the timely cooling and lubrication of the drill bit, the cleaning of broken cuttings and the stability of the well wall all require the use of high-performance drilling fluid media. Polyacrylamide is used as a drilling fluid additive in drilling engineering due to its remarkable viscosity increase, fluid loss reduction and good coating flocculation properties. At the same time, polyacrylamide is a long-chain organic polymer. Using it to replace inorganic salt inhibitors used in calcium-treated drilling fluids can effectively inhibit the formation of mud, greatly improve the stability o...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08F120/56C08K3/34C08K3/24C09K8/035
Inventor 柯扬船魏光耀
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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