Middle-high density elastic liquid rubber plug and well repair method
An elastic liquid, high-density technology, used in chemical instruments and methods, earth-moving drilling, sealing/packing, etc., can solve the problems of killing fluid adsorption and retention damage, difficult to smoothly flow back filtrate, etc., to reduce construction operation costs , Efficient flowback, good stability
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Embodiment 1
[0059] Embodiment 1 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:
[0060] Xiang Shengyou 40-85×10 4 Add 5g of acrylamide copolymer to a beaker of 98g of mg / L potassium formate aqueous solution and stir evenly; add 0.02g of thiourea, 0.25g of disodium edetate and trisodium citrate in turn, and then add 0.25g of g chromium acetate, 2g polyethyleneimine, stir well.
[0061] Test the medium and high density elastic liquid rubber stopper obtained in embodiment 1:
[0062] Load the medium-to-high-density elastic liquid rubber stopper obtained in Example 1 into a 50ml sealed bottle, and put it in a high-temperature (100-130°C) oven to observe the dynamic gelation situation. The specific gelation situation is shown in Table 2.
[0063] Table 2 The gelation situation of the medium and high density elastic liquid rubber stopper obtained in Example 1
[0064]
[0065] After testing, the density of the medium and high d...
Embodiment 2
[0067] Embodiment 2 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:
[0068] Xiang Shengyou 40-85×10 4 Add 5g of the mixture of xanthan gum, guar gum and acrylamide copolymer to a 100g beaker of mg / L potassium formate aqueous solution and stir evenly; add 0.035g thiourea and 0.4g disodium ethylenediaminetetraacetate in turn, after homogenization Add 1.5 g of hexamethylenetetramine and 2 g of polyethyleneimine in sequence and stir evenly.
[0069] The middle and high density elastic liquid rubber stopper that present embodiment obtains is tested:
[0070] Load the medium-to-high density elastic liquid rubber stopper obtained in Example 2 into a 50ml sealed bottle, put it into a high-temperature (100-130°C) oven to observe the dynamic gelation situation, see Table 3 for the specific gelation situation.
[0071] Table 3 Example 2 gelation situation
[0072]
[0073] After testing, the density of the medium and hig...
Embodiment 3
[0075] Embodiment 3 provides a kind of middle and high density elastic liquid rubber stopper, makes through the following steps:
[0076] Xiang Shengyou 40-85×10 4 Add 3g of the mixture of acrylamide, tert-butyl copolymer and acrylamide copolymer to a 100g beaker of mg / L potassium formate aqueous solution, and stir evenly; add 0.015g of the mixture of thiourea and sodium sulfite, 0.8g of ethylenediaminetetra After the mixture of disodium acetate and trisodium citrate is homogenized, 0.25g of chromium acetate and 0.4g of polyethyleneimine are added in sequence and stirred evenly.
[0077] The middle and high density elastic liquid rubber stopper that present embodiment obtains is tested:
[0078] Load the medium-high density elastic liquid rubber stopper obtained in Example 3 into a 50ml sealed bottle, put it into a high-temperature (100-130°C) oven to observe the dynamic gelation situation, and the specific gelation situation is shown in Table 4.
[0079] Table 4 Example 3 g...
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