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Well cementing slurry lightening agent and preparation method thereof

A technology of cementing cement slurry and lightening agent, which is applied in the fields of chemical instruments and methods, preparation of organic compounds, preparation of carbamic acid derivatives, etc., and can solve problems such as easy leakage layer and layer damage of long sealing section

Active Publication Date: 2014-01-08
白银金奇化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cementing lightening agent and its preparation method to solve the technical problem that the cement slurry system is easy to cause damage to the low pressure easy leakage layer and the long sealing section layer

Method used

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  • Well cementing slurry lightening agent and preparation method thereof
  • Well cementing slurry lightening agent and preparation method thereof
  • Well cementing slurry lightening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] (1) Fly ash grinding

[0062] After the purchased fly ash enters the factory, it is first put into the drying system for heating, blown by blowing water and dried, and then put into the ball mill in batches for repeated grinding until the particle size is less than 20 μm. Add 450-500 kg of fly ash to the mixer each time for use.

[0063] (2) Preparation of bisphenol A type epoxy resin

[0064] Stir and dissolve the bisphenol A and epichlorohydrin in the formulated amount at 80°C, then cool down to 50°C, add phenol, and then add 30% NaOH dropwise. After the base is added dropwise, keep warm for a period of time, and then recover unreacted epichlorohydrin under reduced pressure. Then the temperature was lowered to 50° C., 15% NaOH was added dropwise, and the reaction was kept warm after the addition was completed. After the reaction is complete, add benzene, raise the temperature to dissolve, then let stand and wash with water. The upper resin benzene solution is sucke...

Embodiment 2

[0082] (1) Fly ash grinding

[0083] After the purchased fly ash enters the factory, it is first put into the drying system for heating and drying, and then it is put into the ball mill in batches and repeatedly ground until the particle size is less than 20 μm. Add 450-500 kg to the mixer each time for use.

[0084] (2) Preparation of bisphenol A type epoxy resin

[0085] Add 27.8kg epichlorohydrin and 22.8kg bisphenol A to the there-necked flask equipped with stirrer, reflux condenser and thermometer. Heat the water bath to 75°C and start stirring to dissolve all the bisphenol A. Take 8 kg of sodium oxide in 20 liters of distilled water, put the solution into the dropping funnel, slowly add sodium hydroxide solution from the dropping funnel (the dropping funnel is connected to the reflux condenser), and keep the temperature at about 70°C, about 0.5h dropwise completed. Continue to react at 70-80°C for 0.5h, 1.0h, 1.5h, 2.0h, and 2.5h respectively. At this time, the liquid...

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Abstract

The invention relates to the technical field of well drilling and well cementing in the oil and gas fields. The lightening agent is composed of fly ash, bisphenol A epoxy resin, a TDI curing agent and an addictive, the weight percentage and particle size of each component are as follows: 45 to 50% of fly ash, wherein the particle size of fly ash is less than 20 [mu]m; 25 to 30% of bisphenol A expoxy resin, wherein the particle size of bisphenol A epoxy resin is between 0.1 and 0.2 mm; 10 to 15% of TDI curing agent; and 11 to 11.5% of addictive, wherein the addictive is a mixed glue-mixing cured product of active silicone dioxide powder and acrylate polymer, wherein the acrylate polymer is acrylate glue powder or acrylate emulsion. The well cementing low-density slurry body, which is prepared by using the lightening agent, has the characteristics of low density, good rheological property, strong stability, small dehydration rate, and high strength, can effectively solve the difficult problems of low pressure, and easy leakiness during the processes of long isolation section well cementing and oil and gas layer protection, and effectively guarantees the well cementing construction quality.

Description

technical field [0001] The invention belongs to the additive components of cement slurry used in the technical field of drilling and cementing in oil and gas fields, and in particular relates to a cement slurry lightening agent for well cementing and a preparation method thereof. Background technique [0002] There are many types of oil and gas fields in my country, such as low-pressure permeable oil and gas fields, heavy oil and gas fields, fractured oil and gas fields, etc. Most of the oil layers in these oil and gas fields have low pressure coefficients. Cementing is longer and leads to cementing loss. Therefore, to protect the oil and gas layers, the well should be well cemented. In order to meet this requirement, different cementing methods must be adopted according to the characteristics of different oil and gas reservoirs. For special cementing methods such as well cementing, special cement must be used in well cementing, and adding low-density lightening agent to cemen...

Claims

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Application Information

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IPC IPC(8): C09K8/473C08G18/78C08G18/58C08G59/06C07C269/02C07C271/28
CPCC08G18/58C08G18/7843C08G59/063C09K8/473
Inventor 白祯彩
Owner 白银金奇化工科技有限公司
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