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Process for preparing metal-chelate retarder by sol-gel method

A retarder and chelate technology, which is applied in the field of preparation of new retarders, can solve the problems of long production cycle, short production cycle and complicated preparation of retarders, and achieve adjustable thickening time and short production cycle , the effect of simple operation

Active Publication Date: 2020-01-10
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide the technology that utilizes sol-gel method to prepare metal-chelate type retarder, and principle is reliable, has overcome the defect such as existing retarder production cycle is long, preparation is complicated, and process operation is simple, and raw material is cheap Easy to get, short production cycle

Method used

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  • Process for preparing metal-chelate retarder by sol-gel method
  • Process for preparing metal-chelate retarder by sol-gel method
  • Process for preparing metal-chelate retarder by sol-gel method

Examples

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Effect test

Embodiment 1

[0026] A kind of technology that utilizes sol-gel method to prepare metal-chelate type retarder, specifically comprises the following steps:

[0027] Calcium nitrate tetrahydrate (Ca(NO 3 ) 2 4H 2 O) 80g, aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) 20g, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 (2) 10g, then add 50ml deionized water, place on magnetic stirrer and stir 50min, make it mix uniformly, obtain mixed solution A; Weigh citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) 40g is added to the mixed solution A, placed in a water bath at 80°C and stirred to obtain a light yellow solution B; 5 g of ethylene glycol is added successively to the light yellow solution B to undergo an esterification reaction, which lasts for 12 hours to obtain a metal-chelate compound type retarder.

Embodiment 2

[0029] A kind of technology that utilizes sol-gel method to prepare metal-chelate type retarder, specifically comprises the following steps:

[0030] Calcium nitrate tetrahydrate (Ca(NO 3 ) 2 4H 2 O) 90g, aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) 30g, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 (0) 10g, then add 60ml of deionized water, place on a magnetic stirrer and stir for 50min, make it mix evenly, and obtain mixed solution A; weigh 30g of gluconic acid and add in mixed solution A, place in 80 ℃ water bath and stir to obtain light Yellow solution B: Add 10 g of glycerol to the light yellow solution B in sequence to undergo esterification reaction, which lasts for 12 hours to obtain a metal-chelate type retarder.

Embodiment 3

[0032] A kind of technology that utilizes sol-gel method to prepare metal-chelate type retarder, specifically comprises the following steps:

[0033] Calcium nitrate tetrahydrate (Ca(NO 3 ) 2 4H 2 O) 120g, aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 O) 40g, iron nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 (2) 15g, then add 70ml deionized water, place on magnetic stirrer and stir 60min, make it mix uniformly, obtain mixed solution A; Weigh citric acid monohydrate (C 6 h 8 o 7 ·H 2 O) 50g was added to the mixed solution A, placed in a 60°C water bath and stirred to obtain a light yellow solution B; 20g of glycerol was added to the light yellow solution B to undergo an esterification reaction, and the temperature of the water bath was adjusted to 80°C after one hour , continued for 15 hours to obtain a metal-chelate retarder.

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Abstract

The invention relates to a process for preparing a metal-chelate retarder by a sol-gel method, and the method comprises the following steps of: weighing calcium nitrate tetrahydrate, aluminum nitratenonahydrate and ferric nitrate nonahydrate according to a certain mass ratio to be added into deionized water, placing the mixed solution on a magnetic stirrer to stir the mixed solution evenly, adding citric acid monohydrate or gluconic acid, ethylene glycol or glycerol, and placing the mixed solution into a water bath to react to obtain the metal-chelate retarder. The process has reliable principle, overcomes the defects of long production period, complex preparation and the like of the prior retarder, has simple process operation, cheap and easily available raw materials, short production period, wide temperature adaptation range of the prepared retarder and adjustable thickening time, is suitable for large-scale industrial production, and has wide market application prospect.

Description

technical field [0001] The invention relates to a preparation method of a novel retarder in the cementing process in the field of exploration and development of oil and gas fields, in particular to a process for preparing a metal-chelate type retarder by using a sol-gel method, which belongs to cementing cement slurry The preparation method of the admixture. Background technique [0002] The petroleum industry is the blood of economic development, and the quality of cementing directly affects the exploitation of petroleum and the production life of oil and gas wells. With the improvement of drilling technology, oil exploration and development continue to develop in the direction of high-temperature wells, deep wells and ultra-deep wells. For the quality of the well, a retarder is usually added to the cement slurry to increase the thickening time of the cement slurry and prevent the pumped cement slurry from thickening and setting rapidly during the entire pumping process, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/68C04B24/40C09K8/467C04B103/22
CPCC08G63/681C04B24/40C09K8/467C04B2103/22C04B2103/20C04B2103/0086C04B28/02C04B40/0039C04B24/06C04B22/085C04B24/02C07F5/069C07F15/02
Inventor 程小伟余杨张高寅陈祖伟左天鹏张春梅李早元黄盛郭小阳刘健
Owner SOUTHWEST PETROLEUM UNIV
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