Thermoplastic composite polymer for well drilling pressure-bearing plugging
A composite polymer and thermoplastic technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of repeated leakage and poor sealing, prevent lost circulation, slow down permeability leakage and fracture leakage , the effect of preventing the occurrence of
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Embodiment 1
[0021] Weigh ultra-fine calcium carbonate, LWD plugging agent 801, non-permeable plugging agent FST-2, sulfonated asphalt and ultra-fine rubber particles to prepare thermoplastic composite polymer type A DQ-FL-240 for drilling pressure-bearing plugging, The mass ratio is 7:2:2:2:1, and the particle size analysis experiment is carried out after mixing evenly. The results are shown in the attached figure 1 .a. After adding to the field slurry and stirring at 8000r / min for 20 minutes, the compatibility evaluation test was carried out. The evaluation test results are shown in Table 1. The on-site slurry was added to the thermoplastic composite polymer type A DQ-FL-240 for drilling pressure-bearing plugging to carry out the leak-proof plugging experiment, and the microscopic observation picture is shown in the attachment figure 2 .a. From Table 1, attached figure 1 .a and attached figure 2 .a It can be seen that the thermoplastic composite polymer type A DQ-FL-240 used for pr...
Embodiment 2
[0023] Weigh ultra-fine calcium carbonate, LWD plugging agent 801, non-permeable plugging agent FST-2, sulfonated asphalt and ultra-fine rubber particles to prepare thermoplastic composite polymer type A DQ-FL-240 for drilling pressure-bearing plugging, The mass ratio is 7:2:6:2:1, and the particle size analysis experiment is carried out after mixing evenly. See the attached figure 1 .b. After adding to the field slurry and stirring at 8000r / min for 20 minutes, the compatibility evaluation test was carried out. The evaluation test results are shown in Table 1. The on-site slurry was added to the thermoplastic composite polymer type A DQ-FL-240 for drilling pressure-bearing plugging to carry out the leak-proof plugging experiment, and the microscopic observation picture is shown in the attachment figure 2 .b. From Table 1, attached figure 1 .b and attached figure 2 .b It can be seen that the thermoplastic composite polymer type A DQ-FL-240 used for pressure-bearing pluggi...
Embodiment 3
[0028] Weighed superfine calcium carbonate, LWD 801, non-permeable plugging agent FST-2, sulfonated asphalt and superfine rubber particles, thermoplastic elastomer, acrylic superabsorbent resin and amphiphilic fiber to prepare thermoplastic composite rubber crack sealant. Plugging type B DQ-DL-3000, the mass ratio is 3:3:3:2:2:2:2:1, add it into the soil slurry and stir it at 8000r / min for 20 minutes, and carry out the plugging test of the crack width of 0.5~3.0mm , the experimental results are shown in Table 2. It can be seen from Table 2 that the thermoplastic composite rubber crack plugging type B DQ-DL-3000 can form a good plugging of cracks within 3 mm, and see the attached part for the plugging effect. image 3 .
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