Modification method and application of hollow glass microspheres

A technology of hollow glass microspheres and modification, applied in glass manufacturing equipment, manufacturing tools, etc., can solve problems such as uneven distribution, decreased compressive strength, unstable performance of cement slurry, etc., and achieve low permeability and small water loss , good mechanical strength effect

Active Publication Date: 2020-05-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for modifying hollow glass microspheres and its application, which is used to overcome the instability of cement slurry performance and compressive strength caused by the uneven distribution of hollow glass microspheres in cement slurry in the prior art. fall defect

Method used

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  • Modification method and application of hollow glass microspheres

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Effect test

Embodiment 1

[0030] The modification of the hollow glass microspheres of the present embodiment is carried out according to the following steps:

[0031] 1) Cleaning treatment: select 400-mesh hollow glass microspheres 10g, fill them evenly in a glass vessel, place them in the chamber of the plasma processor, turn on the power, turn on the vacuum pump, and when the vacuum degree in the chamber reaches 9Pa, open the flow valve and put Air, when the air flow is stable to 0.5L / min, turn on the high-frequency power supply to clean the hollow glass microspheres, in which the power of the plasma processor is 50W; the cleaning time is 60s.

[0032] (2) Activation treatment: After finishing the cleaning treatment, keep the vacuum degree of the chamber at 9Pa, open the flow valve and put in oxygen, and when the oxygen flow rate is stabilized to 0.5L / min, turn on the high-frequency power supply to activate the hollow glass microspheres. Among them, the power of the plasma processor is 100W; the acti...

Embodiment 2

[0039] The modification of the hollow glass microspheres of the present embodiment is carried out according to the following steps:

[0040] 1) Cleaning treatment: Select 20g of 400-mesh hollow glass microspheres, fill them evenly in a glass container, place them in the cavity of the plasma processor, turn on the power, turn on the vacuum pump, and when the vacuum in the cavity reaches 9Pa, open the flow valve and put Oxygen, when the oxygen flow rate is stable to 0.5L / min, turn on the high-frequency power supply to clean the hollow glass microspheres, in which the power of the plasma processor is 120W; the cleaning time is 100s;

[0041] (2) Activation treatment: After finishing the cleaning treatment, keep the vacuum degree of the chamber at 9Pa, open the flow valve and put in oxygen, and when the oxygen flow rate is stabilized to 0.3L / min, turn on the high-frequency power supply to activate the hollow glass microspheres. Among them, the power of the plasma processor is 200W...

Embodiment 3

[0048] The modification of the hollow glass microspheres of the present embodiment is carried out according to the following steps:

[0049] 1) Cleaning treatment: Select 400-mesh hollow glass microspheres 15g, fill them evenly in a glass vessel, place them in the chamber of the plasma processor, turn on the power, turn on the vacuum pump, and when the vacuum degree in the chamber reaches 7Pa, open the flow valve and put Air, when the air flow is stable to 0.5L / min, turn on the high-frequency power supply to clean the hollow glass beads, in which the power of the plasma processor is 100W; the cleaning time is 80s;

[0050] (2) Activation treatment: After finishing the cleaning treatment, keep the vacuum degree of the cavity at 7Pa, open the flow valve and put in the mixture of air and nitrogen. Turn on the high-frequency power supply to activate the hollow glass microspheres, wherein the power of the plasma processor is 150W; the activation treatment time is 100s;

[0051] (3...

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Abstract

The invention provides a hollow glass bead modification method and application thereof. The hollow glass bead modification method comprises the following steps in sequence: 1) putting hollow glass beads into a plasma treatment instrument cavity, adjusting the pressure inside the plasma treatment instrument cavity to be less than 9Pa, and introducing a cleaning gas into the plasma treatment instrument cavity to clean the hollow glass beads; 2) introducing an activation gas into the plasma treatment instrument cavity to perform activation treatment on the cleaned hollow glass beads; 3) introducing a grafting gas into the plasma treatment instrument cavity to perform grafting treatment on the activated hollow glass beads, thereby generating modified hollow glass beads. The hollow glass bead modification method provided by the invention is simple, convenient, feasible, good in production controllability and good in product consistency; surface activities and hydrophilic performance of the hollow glass beads can be effectively improved, so that the stability of cement slurry can be improved, and the compressive strength of the cement slurry can be improved.

Description

technical field [0001] The invention relates to a modification method and application of hollow glass microspheres, belonging to the technical field of petroleum exploitation. Background technique [0002] The problem of annular channeling after cementing oil and gas wells has plagued major oil and gas fields around the world, and is a huge challenge to maintain the integrity of the wellbore. The gas fields such as Yaha, Kela, Dina, and Keshen in the piedmont structure of the Tarim Oilfield, due to their ultra-deep Due to the geological characteristics of high temperature, high temperature and high pressure, more urgent and complex annular channeling problems are faced. Therefore, in the field of oil and gas exploitation, it is urgent to adopt low-density cement slurry with large temperature difference and stable performance as the main raw material for cementing. [0003] As a new type of rigid particle developed in recent years, hollow glass microspheres have the advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/10C03C23/00C04B28/00
Inventor 滕学清程小伟李宁郭小阳艾正青李早元杨成新龙丹张峰
Owner PETROCHINA CO LTD
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