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

Low-density oil-well cement

An oil well cement, low-density technology, applied in the field of building materials, can solve the problems of occupying land and polluting the environment, and achieve the effects of low density, good fluidity, and stable high temperature performance

Inactive Publication Date: 2018-05-22
毕言铎
View PDF12 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accumulation of a large number of waste glass not only occupies land, but also pollutes the environment

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
  • Low-density oil-well cement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A low-density oil well cement composed of the following parts by weight: 40 parts G-grade oil well cement, 5 parts phosphogypsum, 10 parts waste glass powder, 40 parts fly ash, 0.5 parts plastic expansion agent, 1 part stabilizer Parts, 0.5 parts of retarder, 0.03 parts of enhancer, 1 part of dispersant, 2 parts of aluminum dihydrogen phosphate.

[0021] The waste glass powder is crushed and ground from waste glass to a specific surface area ≥ 400m 2 / kg obtained.

[0022] The plastic expansion agent is calcium peroxide.

[0023] The stabilizer is composed of magnesium aluminum silicate and propylene glycol alginate.

[0024] The retarder is composed of polyol phosphate and sucrose.

[0025] The enhancer is composed of triethanolamine and sodium nitrophenolate in a weight ratio of 2:1.

[0026] The dispersant is composed of polycarboxylic acid water reducing agent and dioctyl succinate sulfonic acid in a weight ratio of 8:1.

Embodiment 2

[0028] A low-density oil well cement composed of the following parts by weight: 60 parts G-grade oil well cement, 2 parts phosphogypsum, 20 parts waste glass powder, 30 parts fly ash, 3 parts plastic expansion agent, 0.05 parts stabilizer Parts, 1 part retarder, 0.01 parts enhancer, 3 parts dispersant, 0.5 parts aluminum dihydrogen phosphate.

[0029] The waste glass powder is made of SiO 2 Waste glass with a content of ≥60% is crushed and ground to a specific surface area of ​​≥400 m 2 / kg obtained.

[0030] The bulk density of the fly ash≤750kg / m 3 .

[0031] The plastic expansion agent is ammonium chloride.

[0032] The stabilizer is composed of magnesium aluminum silicate and propylene glycol alginate in a weight ratio of 3:1.

[0033] The retarder is composed of polyol phosphate and sucrose in a weight ratio of 1:1.

[0034] The enhancer is composed of triethanolamine and sodium nitrophenolate in a weight ratio of 5:1.

[0035] The dispersant is composed of polycarboxylic acid water...

Embodiment 3

[0037] A low-density oil well cement composed of the following parts by weight: 50 parts G grade oil well cement, 4 parts phosphogypsum, 15 parts waste glass powder, 35 parts fly ash, 2 parts plastic expansion agent, 0.5 parts stabilizer Parts, 0.8 parts of retarder, 0.02 parts of enhancer, 2 parts of dispersant, 1.2 parts of aluminum dihydrogen phosphate.

[0038] SiO in the waste glass powder 2 The content is ≥60%.

[0039] The plastic expansion agent is azodicarbonamide.

[0040] The stabilizer is composed of magnesium aluminum silicate and propylene glycol alginate.

[0041] The retarder consists of total phosphorus (in PO 4 3- Count) Polyol phosphate and sucrose with content ≥30%.

[0042] The enhancer is composed of triethanolamine and sodium nitrophenolate in a weight ratio of 3:1.

[0043] The dispersant is composed of polycarboxylic acid water reducing agent and dioctyl succinate sulfonic acid in a weight ratio of 6:1.

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
specific surface areaaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of construction materials and discloses high temperature resistant low-density oil-well cement. The low-density oil-well cement is prepared from the following substances in parts by weight: 40 to 60 parts of G-grade oil-well cement, 2 to 5 parts of phosphorus gypsum, 10 to 20 parts of waste glass powder, 30 to 40 parts of fly ash, 0.5 to 3 parts of a plastic expanding agent, 0.05 to 1 part of a stabilizer, 0.5 to 1 part of a retarder, 0.01 to 0.03 part of an enhancing agent, 1 to 3 parts of a dispersant and 0.5 to 2 parts of aluminum dihydrogen phosphate. The low-density oil-well cement disclosed by the invention has the advantages of small density, good flowability, stable high-temperature performance and the like, and is very suitable for requirements of cementing engineering of deep wells and long shut-in wells.

Description

Technical field [0001] The invention belongs to the technical field of building materials, and specifically relates to a low-density oil well cement. Background technique [0002] With the rapid development of the petroleum industry, the demand for oil well cement for oil and gas cementing is also rising. Especially due to the improvement of drilling technology and the intensification of the degree of exploitation, the number of deep wells and long closed wells is increasing. The deepening and poor geological conditions put forward higher requirements on the performance of cementing slurry, and the demand for low-density oil well cement is even more urgent. Patent CN103725276A discloses a low-density fly ash cement slurry, which has high strength and can reduce cement stone shrinkage, but has high density and is not resistant to high temperatures. Patent CN101747009A discloses a high-temperature low-density cement, which has excellent properties such as low density and high temp...

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 Applications(China)
IPC IPC(8): C04B28/00C09K8/473C04B22/14C04B14/22C04B18/08
CPCC04B14/22C04B18/08C04B22/144C04B28/00C04B2201/20C04B2201/50C09K8/473C04B22/068C04B22/08C04B24/06C04B24/003C04B24/10C04B24/122C04B24/24C04B24/16C04B22/16C04B24/127C04B22/124C04B24/124Y02W30/91
Inventor 毕言铎
Owner 毕言铎
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