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

Acrylic fluid loss agents for oil well cement as well as preparation method and application of acrylic fluid loss agents

A technology of oil well cement and fluid loss reducer, which is applied in chemical instruments and methods, earthwork drilling and production, wellbore/well parts, etc. It can solve problems such as large fluctuations in raw material quality, poor high temperature resistance and salt resistance, and achieve Good cementing water loss reduction effect, strong high temperature resistance, and filtration loss reduction effect

Inactive Publication Date: 2017-11-07
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of large fluctuations in raw material quality, poor high temperature resistance and salt resistance of the existing medium temperature dehydration agent

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
  • Acrylic fluid loss agents for oil well cement as well as preparation method and application of acrylic fluid loss agents
  • Acrylic fluid loss agents for oil well cement as well as preparation method and application of acrylic fluid loss agents
  • Acrylic fluid loss agents for oil well cement as well as preparation method and application of acrylic fluid loss agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides an acrylic fluid loss reducer for oil well cement, which consists of the following components in weight percentage:

[0041] Polymethacrylic acid, 15%;

[0042] Calcium formate, 47%;

[0043] Sodium sulfate, 21%;

[0044] The balance is triethanolamine.

[0045] Preparation method of acrylic fluid loss reducer for oil well cement: Take polymethacrylic acid and triethanolamine according to the ratio and put them into a mixing tank and stir for 15 minutes to make triethanolamine evenly cover polymethacrylic acid, then add calcium formate and sodium sulfate Stir for 25 minutes to complete the preparation of the fluid loss reducer.

Embodiment 2

[0047] This embodiment provides an acrylic fluid loss reducer for oil well cement, which consists of the following components in weight percentage:

[0048] Polyethylacrylate, 16%;

[0049] Calcium formate, 45%;

[0050] Sodium sulfate, 20%;

[0051] The balance is triethanolamine.

[0052] Preparation method of acrylic water loss reducer for oil well cement: Take polyethylacrylate and triethanolamine according to the ratio and put them into the mixing tank and stir for 16 minutes, so that the triethanolamine can evenly cover the polyacrylate, and then add calcium formate and sodium sulfate Stir for 27 minutes to complete the preparation of the fluid loss reducer.

Embodiment 3

[0054] This embodiment provides an acrylic fluid loss reducer for oil well cement, which consists of the following components in weight percentage:

[0055] Polyacrylamide, 17%;

[0056] Calcium formate, 46%;

[0057] Sodium sulfate, 25%;

[0058] The balance is triethanolamine.

[0059] Preparation method of acrylic fluid loss reducer for oil well cement: Take polyacrylamide and triethanolamine according to the ratio, put them into a mixing tank and stir for 17 minutes, so that triethanolamine can evenly cover polyacrylamide, then add calcium formate and sodium sulfate and stir for 30 minutes , to complete the preparation of the fluid loss reducer.

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 provides acrylic fluid loss agents for oil well cement as well as a preparation method and an application of the acrylic fluid loss agents. The acrylic fluid loss agents for the oil well cement are prepared from components in percentage by weight as follows: 15-20 parts of acrylic polymers, 45%-50% of calcium formate, 20%-25% of sodium sulfate and the balance of triethanolamine. The water retention and wide-spectrum acrylic polymer fluid loss agents are particularly applicable to high-temperature and high-salt oil-layer well cementation and have the comprehensive properties including low fluid loss, temperature resistance, salt resistance, wide temperature use range, high gas channeling prevention capability and the like. The acrylic fluid loss agents can effectively control fluid loss of cement slurry, prevent free water from entering the stratum and ensure the bonding quality of set cement with the interface, also has a function of channeling prevention in the stratum and guarantees the well cementation quality. A formed cement slurry system has good fluidity and has no thixotropy when left to stand; fluid loss of the cement slurry is small, the sedimentation stability is good, and the compressive strength is high; the thickening transition time is short, and the thickening curve type is normal; the acrylic fluid loss agents have the comprehensive properties including temperature resistance, salt resistance, wide temperature use range, high gas channeling prevention capability and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum additives, relates to the technical field of oil field drilling and completion engineering, in particular to an acrylic fluid loss reducer for oil well cement and a preparation method thereof. Background technique [0002] As the drilling depth of oil and gas wells increases, the formation temperature and pressure also continue to increase, and high temperature and high pressure can cause adverse consequences such as shortened thickening time of the cement slurry system, failure of admixtures, and increased water loss, which seriously affect the quality of cementing. Fluid loss reducer is an additive used in a large amount in cementing cement, which can control the water loss of cement slurry, prevent free water from entering the formation, ensure the bonding quality between cement stone and interface, and at the same time play the role of preventing channeling of the formation. If a large amoun...

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): C09K8/487E21B33/13
CPCC09K8/487E21B33/13
Inventor 魏周胜安娜李波蒋敏董小龙白新平
Owner BC P INC CHINA NAT PETROLEUM 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