High-strength temperature resistant viscoelastic polymer for profile control
A polymer and high-strength technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as shear sensitivity, and achieve the effects of low environmental toxicity, environmental friendliness, and good biodegradability
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Embodiment 1
[0046] Polymerization of the solution: Blow nitrogen to remove oxygen for 30-40 minutes, add the initiator ammonium persulfate, pass nitrogen for 15 minutes, add the initiator sodium formaldehyde bisulfite, continue to pass nitrogen, when the temperature rises by 2°C during the induction period, stop nitrogen, After 5 hours of reaction, shear, dry, and granulate to obtain the finished product.
[0047] Example 2:
Embodiment 2
[0049] Polymerization of the solution: Blow nitrogen to remove oxygen for 30-40 minutes, add the initiator ammonium persulfate, pass nitrogen for 15 minutes, add the initiator sodium formaldehyde bisulfite, continue to pass nitrogen, when the temperature rises by 2°C during the induction period, stop nitrogen, After 5 hours of reaction, shear, dry, and granulate to obtain the finished product.
[0050] Example 3:
Embodiment 3
[0052] Polymerization of the solution: Blow nitrogen to remove oxygen for 30-40 minutes, add the initiator ammonium persulfate, pass nitrogen for 15 minutes, add the initiator sodium formaldehyde bisulfite, continue to pass nitrogen, when the temperature rises by 2°C during the induction period, stop nitrogen, After 5 hours of reaction, shear, dry, and granulate to obtain the finished product.
[0053] Example 4:
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