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Method of preparing oil well cement briquette from quartz ceramic closed-pore hollow microspheres

A technology of quartz ceramics and hollow microspheres, which is applied in the field of materials to achieve excellent performance, high activity, and improved early strength

Inactive Publication Date: 2014-06-25
广州市昊晶建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]Due to the gradual reduction of oil and gas resources in low-temperature oil wells on land, the development of low-temperature oil wells on land has gradually shifted from low-temperature oil wells on land to deep land and ocean deep layers. The needs of oil wells require the use of new technologies, new processes, and new materials to meet the requirements of deep high-pressure, high-temperature oil wells. The cement slurry density is 1.0 g / cm3~1.5 g / cm3 sup>, the hydrostatic pressure resistance of quartz ceramic microbeads is 80Mpa to 120 Mpa, which can meet the cementing requirements of low-density oil wells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029](1) Preparation of closed-cell hollow microspheres of quartz ceramics ① Batching and firing: Quartz powder with a particle size of 1-15 μm, holmium oxide with a particle size of 10-20 μm and polyvinyl alcohol solution in a weight ratio of 90 wt%: 3 wt%: 7 wt%, first mix the quartz powder and holmium oxide powder evenly, then add polyvinyl alcohol solution and stir evenly in a mixer, seal for 4 hours and press into a billet, dry at 100 C for 1 hour, and heat-preserve and fire at 1200 C for 1 hour The quartz ceramic material containing holmium oxide was obtained within hours, and the sintered body of quartz ceramics containing holmium oxide was processed into 10 μm microspheres in a spheroidizing machine. ② Liquid preparation: 10 μm quartz ceramic microspheres 72 wt%: water 28 wt%, in the Add light potassium sulfate foaming agent to the medium, the concentration is 1g / L, ④ Filtration: remove large particles and impurities; The temperature is 800 °C, the drying and sinterin...

Embodiment 2

[0041] (1) Preparation of closed-cell hollow microspheres of quartz ceramics ① Batching and firing: Quartz powder with a particle size of 20-35 μm, holmium oxide with a particle size of 25-35 μm and polyvinyl alcohol solution in a weight ratio of 92 wt%: 2 wt%: 6 wt%, firstly mix quartz powder and holmium oxide powder evenly, then add polyvinyl alcohol solution and stir evenly in a mixer, seal for 4 hours and press into a billet, dry at 100 C for 1.5 hours, and heat-preserve and fire at 1300 C The quartz ceramic material containing holmium oxide was obtained in 2 hours, and the quartz ceramic sintered body containing holmium oxide was processed into 15 μm microbeads in a spheroidizing machine. ② Liquid preparation: 15 μm quartz ceramic microbeads 75 wt%: water 25 wt%, Add light potassium sulfate foaming agent to the slurry, the concentration is 2g / L, ④ Filtration: remove large particles and impurities; The expansion temperature is 820 °C, the drying and sintering temperature i...

Embodiment 3

[0053] (1) Preparation of closed-cell hollow microspheres of quartz ceramics ① Batching and firing: Quartz powder with a particle size of 40-50 μm, holmium oxide with a particle size of 40-50 μm and polyvinyl alcohol solution in a weight ratio of 95 wt%: 1 wt%: 4 wt%, firstly mix the quartz powder and holmium oxide powder evenly, then add polyvinyl alcohol solution and stir evenly in a mixer, seal for 4 hours and press into a billet, dry at 100 C for 2 hours, and heat-preserve and fire at 1400 C for 3 The quartz ceramic material containing holmium oxide was obtained within hours, and the sintered body of quartz ceramics containing holmium oxide was processed into 20 μm microspheres in a spheroidizing machine. ② Dosing: 20 μm quartz ceramic microspheres 80 wt%: water 20 wt%, in the slurry Add light potassium sulfate foaming agent, the concentration is 3g / L ④ Filtration: Remove large particles and impurities; ⑤ Firing: Use high-pressure jet high-speed centrifugal rotary spray met...

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Abstract

The invention provides a method of preparing oil well cement briquette from quartz ceramic closed-pore hollow microspheres. The method comprises the following steps of preparing quartz ceramic closed-pore hollow microspheres, preparing materials, mixing, stirring and size-mixing, mould testing and carrying out a strength test; the method is characterized in that 40wt%-50wt% of G-level oil well cement, 10wt%-15wt% of 13-mu m superfine cement, 25wt%-35wt% of quartz ceramic closed-pore hollow microspheres with particle diameter of 5 mum -50 mum, 5wt%-7wt% of coal ashes with loss on ignition of 1.1%, 1.5wt%-2wt% of calcium oxide with purity of 99.9%, 0.5wt%-1.0wt% of sodium sulfate and 1wt%-3wt% of micro-silicon are uniformly mixed, stirring and size-mixing are carried out for 40 seconds in a stirrer in a water-cement ratio (W / C)of 0.5-0.6, the materials are poured into mould testing, maintained for 24 hours and 48 hours in a water-bath maintenance box at a constant temperature of 52 DEG C, and de-molded and then soaked in cold water for 1 hour to carry out performance test.

Description

technical field [0001] The invention relates to a method for preparing an oil well cementing cement test block with closed-pore hollow microspheres of quartz ceramics, belonging to the technical field of materials. Background technique [0002] At present, domestic oil well cementing lightening agent uses floating beads in fly ash, including sinking beads and floating beads in fly ash, and the density of sinking beads is 1.1 ~ 2.8g / cm 3 , between, and the content accounts for 30-70% of fly ash. Floating beads are glass beads in fly ash that are less dense than water. Floating beads mainly include aluminosilicate glass beads and porous carbon particles. Floating beads after removing carbon particles It mainly includes thin-walled aluminosilicate glass beads with smooth inner and outer surfaces and large volume. 0.5 to 1% of the total ash, and the aluminosilicate glass microspheres are hollow spheres. [0003] Floating beads in fly ash are when coal powder burns at 1100-1500...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B14/06
Inventor 郭志东
Owner 广州市昊晶建筑材料有限公司
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