Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of retarder used for oil gas well cementing operation, retarder and application

A retarder, oil and gas well technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of short thickening time that cannot meet the safety construction requirements, large temperature difference between the top and bottom of the cement slurry column, and deep well cementing Problems such as engineering construction difficulties, to achieve the effect of low concentration required for triggering, avoiding induced decomposition, and high applicable temperature

Pending Publication Date: 2018-03-20
CHINA PETROLEUM & CHEM CORP +1
View PDF15 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the cementing of deep or ultra-deep wells, we often face the problem of high temperature at the bottom of the well and long sealing section, resulting in a large temperature difference between the top and bottom of the cement slurry column. The existing retarder may not meet the safety construction requirements due to the short thickening time. , or lead to slow development of cement stone strength at the top or super-retarding, which brings difficulties and safety hazards to deep well cementing engineering construction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of retarder used for oil gas well cementing operation, retarder and application
  • Preparation method of retarder used for oil gas well cementing operation, retarder and application
  • Preparation method of retarder used for oil gas well cementing operation, retarder and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In a 1000ml four-necked round bottom flask, add 250g 2-acrylamido-2-methylpropanesulfonic acid and 500g deionized water and stir to dissolve, add NaOH solution to adjust the pH value of the system to 9, then add 83g itaconic acid, and The reactor was placed in a constant temperature water bath at 60°C, kept for 10 minutes, and azobisisobutylimidazoline hydrochloride initiator solution with a mass concentration of 20% was added dropwise, wherein the amount of the initiator was 2-acrylamido-2-methyl 0.1% of the total mass of propanesulfonic acid and itaconic acid was reacted at 90° C. for 2 hours to obtain sample 1 with an effective content of 37%.

[0027] Prepare cement slurry according to GB / T 19139-2003 standard, and evaluate initial consistency, thickening time, and water loss. The cement slurry formula is: Jiahua G grade cement + 35% silica fume + sample 1 + fluid loss reducer (liquid) + water, the water-cement ratio is 0.44, and the amount of samples added in the f...

Embodiment 2

[0032] In a 500ml four-neck round bottom flask, add 125g of 2-acrylamido-2-methylpropanesulfonic acid and 250g of deionized water and stir to dissolve, use NaOH solution to adjust the pH value to 12, then add 46g of itaconic acid, and react Put the device in a constant temperature water bath at 40°C, keep it for 30 minutes, and add dropwise azobisisopropylimidazoline initiator solution with a mass concentration of 5%, wherein the amount of initiator is 2-acrylamido-2-methylpropanesulfonic acid React with 5% of the total mass of itaconic acid at 50°C for 5 hours to prepare an AMPS / IA copolymer retarder solution. The liquid product is precipitated with ethanol to obtain sample 2, which is a white solid product.

Embodiment 3

[0034] In a 500ml four-neck round bottom flask, add 125g of 2-acrylamido-2-methylpropanesulfonic acid and 250g of deionized water and stir to dissolve, use NaOH solution to adjust the pH value to 10, then add 46g of itaconic acid, and react Put the device in a constant temperature water bath at 50°C, keep it for 20 minutes, and add dropwise azobisisobutyramide hydrochloride initiator solution with a mass concentration of 10%, wherein the amount of initiator is 2-acrylamido-2-methylpropanesulfonate 1% of the total mass of acid and itaconic acid were reacted at 70° C. for 3 hours to obtain sample 3.

[0035] Prepare cement slurry according to GB / T 19139-2003 standard, and evaluate initial consistency, thickening time, and water loss. The cement slurry formula is: Jiahua G grade cement + 35% silica fume + sample 3 + fluid loss reducer (liquid) + water, the water-cement ratio is 0.44, and the amount of samples added in the formula is based on cement. The test performance is shown...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparation method of a retarder used for oil gas well cementing operation, the retarder and an application. The preparation method comprises the following steps: (1) adding2-acrylamido-2-sodium methallyl sulfonate into deionized water and stirring to dissolve, wherein the use amount of the deionized water is 1-3 times of 2-acrylamido-2-sodium methallyl sulfonate; addingan NaOH solution to regulate the pH value of the system to 9-12; (2) adding itaconic acid to the solution obtained in the step (1), heating in thermostatic waterbath till reaching 40-60 DEG C, and keeping for 10-30min, wherein the mass ratio of 2-acrylamido-2-sodium methallyl sulfonate to itaconic acid is (73-75):(25-27); (3) slowly dripping an initiator solution to the solution obtained in step(2); slowly heating to 50-90 DEG C while dripping, and continuing reaction for 2-5h after dripping is completed, so as to obtain a liquid product; and (4) participating by alcohol, drying and smashingthe liquid product obtained in step (3) so as to obtain a product which is white powder. The retarder is small in adding amount, high in application temperature and large in temperature resistant scope span.

Description

technical field [0001] The invention relates to the field of oil field cementing, and more specifically, relates to a preparation method of a broad-spectrum temperature retarder for oil and gas well cementing, the retarder and its application. Background technique [0002] With the continuous deepening of oilfield exploration and development, the number of deep wells and ultra-deep wells is increasing. In the cementing operation of high geothermal gradient deep wells or deep wells with long sealing sections, it is often encountered that the cement sealing section is long (sealing The section is greater than 2000m), the bottom hole temperature is high (some can even reach above 200°C), and the temperature difference between the top and bottom of the cement slurry column is large (up to 60°C or even higher), which brings challenges to the cementing project. [0003] Since the cementing operation process is to pump the cement slurry into the casing through the surface pumping e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08F220/58C08F222/02C08F4/04C09K8/467
CPCC08F4/04C08F220/58C09K8/467C08F220/585C08F222/02
Inventor 苗霞刘仍光谭春勤刘学鹏周仕明张明昌
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com