Organic synthetic plugging granules for well drilling, and preparation method and application thereof
A technology of organic synthesis and particles, which is applied in drilling compositions, chemical instruments and methods, and earthwork drilling and mining, can solve the problems of poor dispersion of plugging particles, unsuitable density, and easy degradation, and achieve non-degradable, raw materials Saving and good effect of dispersion
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Embodiment 1
[0033] The following components are proportioned by weight: 48 parts of polyetheretherketone (PEEK powder), 48 parts of polyetherimide (PEI pellets), 4 parts of calcium sulfate whiskers, and dyes. Add the aforementioned raw materials into a high-speed mixer, mix at a blending temperature of 380°C and a shear rate of 2.5 / s for 10 to 30 minutes, then extrude at 300°C, cool, dry, and granulate. Product particle size 0.180mm~4.750mm, density 1.35g / cm 3 , in a caustic soda solution with a pH value of 12.5 at 120°C, the mass loss rate is 13.51%, the plugging capacity is 16.5MPa, the filtration loss is 483ml, and the crushing rate under 25MPa pressure is 10.80%.
[0034] The test standards or methods for the aforementioned data are as follows:
[0035] Test method of crushing rate under pressure: Weigh 10g (accurate to 0.01g) of the sample (for example: particles with a specification of 1.000mm ~ 1.200mm, take the 1.200mm sieve but not the 1.000mm sieve) as m, add Into the pressure...
Embodiment 2
[0039]This example is basically the same as Example 1, the difference being that the following components are proportioned by weight: 33 parts of polyetheretherketone (PEEK powder), 33 parts of polyetherimide (PEI pellets), carbonic acid Calcium whiskers 4 parts, magnesium borate whiskers 30 parts, dye. Product particle size 0.180mm~4.750mm, density 2.0g / cm 3 , in a caustic soda solution with a pH value of 12.5 at 120°C, the mass loss rate is 9.85%, the plugging capacity is 18.5MPa, the filtration loss is 321ml, and the crushing rate under 25MPa pressure is 5.22%. The experimental detection method is as above.
Embodiment 3
[0041] This example is basically the same as Example 1, the difference being that the following components are proportioned by weight: 40 parts of polyether ether ketone (PEEK powder), 40 parts of polyetherimide (PEI pellets), carbonic acid Calcium whiskers 5 parts, magnesium borate whiskers 15 parts, dye. Product particle size 0.180mm~4.750mm, density 1.67g / cm 3 , in a caustic soda solution with a pH value of 12.5 at 120°C, the mass loss rate is 10.51%, the plugging capacity is 17MPa, the filtration loss is 383ml, and the crushing rate under 25MPa pressure is 7.32%. The experimental detection method is as above.
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