Elastic-plastic plugging particle for oil-based drilling fluid and preparation method of elastic-plastic plugging particle
An oil-based drilling fluid, elastic-plastic technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of complex downhole accidents, plugging, and re-circulation, and achieve good elastic deformation ability and plugging performance. , The effect of good oil resistance and high pressure bearing capacity
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Embodiment 1
[0026] An elasto-plastic plugging particle for oil-based drilling fluid, the inner core is an elastic-plastic rubber particle, and the outer shell is coated with inert nano-particles. Wherein, the rubber particles are natural rubber, and the particle size range is 1-3 mm; the inert nanoparticles are nano-calcium carbonate, and the particle size range of the nano particles is 50-100 nm.
[0027] The preparation method of the elastic-plastic plugging particles for the oil-based drilling fluid comprises:
[0028] (1) Select uniform rubber particles with a particle size range of 1-3mm to clean and dry;
[0029] (2) Spray the rubber particles with 8% acetic acid solution and 5% glycerol solution successively, and keep turning the rubber particles during the spraying process to ensure that the surfaces of all rubber particles are fully wetted;
[0030] (3) Put the wetted rubber particles on the temperature-controlled ultrasonic vibrating screen, and the mesh of the screen cloth is ...
Embodiment 2
[0035] An elasto-plastic plugging particle for oil-based drilling fluid, the inner core is an elastic-plastic rubber particle, and the outer shell is coated with inert nano-particles. Wherein, the rubber particles are natural rubber, with a particle size range of 3-5mm; the inert nanoparticles are nano-calcium carbonate, and the nanoparticle size range is 100-200nm.
[0036] The preparation method of the elastic-plastic plugging particles for the oil-based drilling fluid comprises:
[0037] (1) Select uniform rubber particles with a particle size range of 3-5mm to clean and dry;
[0038] (2) Spray the rubber particles with 8% acetic acid solution and 5% glycerol solution successively, and keep turning the rubber particles during the spraying process to ensure that the surfaces of all rubber particles are fully wetted;
[0039] (3) Put the wetted rubber particles on the temperature-controlled ultrasonic vibrating screen, and the mesh of the screen cloth is smaller than the dia...
Embodiment 3
[0044] An elastic-plastic plugging particle for oil-based drilling fluid, the inner core is an elastic-plastic rubber particle, and the outer shell is coated with inert nano particles. Wherein, the rubber particles are natural rubber, with a particle size range of 1-3 mm; the inert nanoparticles are nano-calcium carbonate, and the nanoparticle size range is 50-100 nm.
[0045] The preparation method of the elastic-plastic plugging particles for the oil-based drilling fluid comprises:
[0046] (1) Select uniform rubber particles with a particle size range of 1-3mm to clean and dry;
[0047] (2) Spray the rubber particles with 8% acetic acid solution and 5% glycerol solution successively, and keep turning the rubber particles during the spraying process to ensure that the surfaces of all rubber particles are fully wetted;
[0048] (3) Put the wetted rubber particles on the temperature-controlled ultrasonic vibrating screen, and the mesh of the screen cloth is smaller than the d...
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