Bridging particle for shallow casing blind hole
A plugging agent and casing leakage technology, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problem of short thickening time of oil well cement and ultra-fine cement, difficulty in solving the problem of casing leakage, and low plugging success rate and other problems, to achieve the effect of no shrinkage in curing volume, no shrinkage in volume, and improved safety
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Embodiment 1
[0012] A kind of plugging agent for shallow casing lost circulation well, the concrete steps of its technical scheme are as follows:
[0013] Weigh 40g of water, add 0.5g of iron complex salt under stirring, after it is completely dissolved, slowly add 2g of nano-zirconia, 17g of silica powder, 13g of light calcium carbonate, 26g of ultra-fine cement, 0.5g of glass fiber, etc. under high-speed stirring After the material is fully stirred evenly, continue to add 1g of calcium formate while stirring until it is evenly mixed, take the slurry and put it into a constant temperature container and mold, seal it and put it in a constant temperature water bath at 60°C for constant temperature curing for 48 hours, take out the solidified body and flow it according to the core The test requires drilling a rock core and measuring its breakthrough pressure as 1.0MPa / cm; taking out the solidified body in the mold, and measuring its compressive strength with a uniformly loaded pressure testin...
Embodiment 2
[0015] A kind of plugging agent for shallow casing lost circulation well, the concrete steps of its technical scheme are as follows:
[0016] Weigh 37g of water, add 1g of iron complex salt under stirring, after it is completely dissolved, slowly add 1.5g of nano-zirconia, 18g of silicon micropowder, 14g of light calcium carbonate, 27g of ultra-fine cement, 1g of glass fiber and other materials under high-speed stirring After fully stirring evenly, continue to add 0.5g of calcium formate while stirring until evenly mixed, take the slurry and put it into a constant temperature container and mold, seal it and put it in a constant temperature water bath at 60°C for 48 hours, take out the solidified body and flow it according to the core The test requires drilling a rock core and measuring its breakthrough pressure as 1.3MPa / cm; taking out the solidified body in the mold, and measuring its compressive strength with a uniformly loaded pressure testing machine as 31.5MPa; pouring the...
Embodiment 3
[0018] A kind of plugging agent for shallow casing lost circulation well, the concrete steps of its technical scheme are as follows:
[0019] Weigh 35g of water, add 1g of iron complex salt under stirring, after it is completely dissolved, slowly add 1g of nano-zirconia, 19g of silica powder, 15g of light calcium carbonate, 28g of ultra-fine cement, 0.5g of glass fiber and other materials under high-speed stirring After fully stirring evenly, continue to add 0.5g of calcium formate while stirring until evenly mixed, take the slurry and put it into a constant temperature container and mold, seal it and put it in a constant temperature water bath at 60°C for 48 hours, take out the solidified body and flow it according to the core The test requires drilling a rock core and measuring its breakthrough pressure as 1.2MPa / cm; taking out the solidified body in the mold, and measuring its compressive strength with a uniformly loaded pressure testing machine as 30.8MPa; pouring the prepa...
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