Oil well cement expanding agent and preparation method thereof,
A technology of oil well cement and expansion agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as poor compatibility, obvious thickening, and inconspicuous cement expansion effect, and achieve stable expansion rate and high compression resistance Effect of strength, good salt resistance and compatibility
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0018] In order to solve the problems that the expansion effect of cement is not obvious under high temperature and high pressure, the compatibility with retarder and fluid loss reducer is poor, and the thickening is obvious, this embodiment provides an expansion agent for oil well cement. The expansion agent is a kind of Salt-resistant and compatible inorganic polymer coagulant polyaluminum chloride, the polyaluminum chloride is obtained by reacting aluminum ash, industrial hydrochloric acid and water at a mass ratio of 3:1:3 .
[0019] The cement stone formed by polyaluminum chloride during the hydration process contains both high-reactivity components and low-reactivity components. These formed components will be accompanied by volume expansion, and the reactivity and The effect is different, so it can maintain stable volume expansion in different hydration stages of cement. In the plastic state, the highly reactive components in the expansive material first react with the...
Embodiment 2
[0021] This embodiment provides the preparation method of the oil well cement expansion agent in the above-mentioned embodiment 1, comprising the following steps:
[0022] (1) Prepare aluminum ash, industrial hydrochloric acid and water according to the mass ratio, the mass ratio of aluminum ash, industrial hydrochloric acid and water is 3:1:3;
[0023] (2) Add the aluminum ash prepared in step (1) to the industrial hydrochloric acid, stir continuously and replenish water during the addition process;
[0024] (3) Aluminum ash, industrial hydrochloric acid and water are reacted. During the reaction, the reaction temperature is 80°C-110°C, the reaction time is 6-8h, the pH is controlled at 3.5-4.5, and the aging time is 15-24h, and finally a liquid product is obtained ;
[0025] (4) Filtrate and dry the liquid product obtained in step (3). After the liquid product is filtered and dried, a solid product can be obtained, which is the oil well cement expansion agent to be prepared...
Embodiment 4
[0028] The present embodiment illustrates the oil well cement expansion agent and its preparation method in the present invention in conjunction with specific implementation data:
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More 
PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.
