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

Oil well cement drag reducer

A technology of oil well cement and drag reducing agent, which is applied in the field of oil well cement drag reducing agent. It can solve the problems that the drag reducing agent cannot effectively suspend cement particles and the slow development of cement stone strength, so as to achieve good drag reducing effect, ensure strength and ensure dispersion effect of effect

Active Publication Date: 2018-04-20
CHINA PETROLEUM & CHEM CORP +2
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a drag reducer for oil well cement. This drag reducer focuses on solving the problem that the drag reducer cannot effectively suspend cement particles, free water is precipitated and the drag reducer affects the development of cement stone strength. slow problem

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
  • Oil well cement drag reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0027] A kind of oil well cement drag reducing agent, composition and weight fraction are as follows:

[0028] The molar ratio of acetone: sodium bisulfite: formaldehyde: Vc is 6:3:1:1.5

[0029] The preparation method of above-mentioned drag reducer is as follows:

[0030] ⑴ According to the required molar ratio, add acetone, sodium bisulfite, and formaldehyde to the water in the reaction kettle in sequence, stir evenly, and prepare an aqueous solution;

[0031] (2) Then use caustic alkali to catalyze, and the amount of caustic alkali (NaOH or KOH) added is 2wt%;

[0032] (3) The reaction temperature is 80°C, and the temperature is kept for 3 hours to obtain the polymer product.

[0033] ⑷ After the product is obtained, add Vc to compoun...

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

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a drag reducer for oil-well cement, which comprises the following components in parts by weight: 6 parts of acetone, 3 parts of sodium bisulfite, 1 part of formaldehyde and 1.5 parts of Vc. The preparation method comprises the following steps: (1) sequentially adding the acetone, sodium bisulfite and formaldehyde into water of a reaction kettle according to the required mole ratio, and stirring uniformly to prepare a water solution; (2) catalyzing with caustic alkali; (3) keeping the reaction temperature at 80 DEG C for 3 hours to obtain a polymer product; and (4) adding the Vc to compound with the product, thereby obtaining the drag reducer for oil-well cement. The drag reducer for oil-well cement has the advantages of favorable drag reduction effect and high temperature resistance; and after the drag reducer is added into the oil-well cement, the cement paste does not produce severe settling, thereby being beneficial to the development of the strength of cement.

Description

technical field [0001] The invention belongs to the field of additives for oil well cement and relates to a drag reducer for oil well cement. Background technique [0002] While the general drag reducer plays a role in reducing drag on the cement slurry, because it destroys the microstructure formed by the electrostatic attraction, it often cannot effectively suspend cement particles, and free water is precipitated, resulting in phase separation, that is, free water and Cement stone density gradient from bottom to top is the most taboo for directional wells and horizontal wells; in addition, some drag reducers have side effects of retardation and foaming; some drag reducers are incompatible with cement slurry systems or other admixtures Capacity, slow development of strength and other issues. [0003] According to the search, the following patent documents related to the present application are found, and the specific disclosure content is as follows: [0004] 1. CN1023822...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/487
CPCC09K8/487
Inventor 王威高敬山罗杰东卢书义
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