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

Polymer filtrate reducer and preparation method thereof

A technology of fluid loss reducer and polymer, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of low molecular weight and unsatisfactory, and achieve simple operation, stable product quality, and no pollution to the environment Effect

Active Publication Date: 2015-03-11
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing polymer fluid loss reducer that cannot meet the needs of safe drilling construction in ultra-high temperature and / or high-salt (saturated salt) environments, and to provide a fluid loss reducer with a relatively low molecular weight. Polymer Fluid Loss Control Agent with Dual Function of Deflocculation and Deflocculation

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
  • Polymer filtrate reducer and preparation method thereof
  • Polymer filtrate reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add the required amount of water into the reaction flask with a stirrer, then add 25g of sodium hydroxide, and after it dissolves, mix the acidic monomer, 2-acrylamide-2-methylpropanesulfonic acid 90g, acryloyloxybutyl 40g of sulfonic acid, stir until completely dissolved; then add 35g of acrylamide and 25g of N-vinylcaprolactam, stir to dissolve, and adjust the pH value of the system to 7.5 with a mass fraction of 20% to 45% sodium hydroxide aqueous solution; The reaction mixture of the above-mentioned monomers was transferred to a polypropylene plastic container, and 5 g of relative molecular mass regulator isopropanol, 0.5 g of oxidation-reduction initiator potassium persulfate, and 0.25 g of sodium sulfite were added accordingly under stirring, and the mixture was stirred evenly and left to stand React for 20 minutes, the initial temperature of the polymerization reaction is 10°C, and finally obtain a porous elastomer, which is crushed, dried, and pulverized to obtai...

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
shear viscosityaaaaaaaaaa
shear viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polymer filtrate reducer and a preparation method thereof. The preparation method specifically comprises the following steps of: firstly, neutralizing an acid monomer with sodium hydroxide, then adding nonionic monomer acrylamide and N-vinylcaprolactam, controlling the pH valve of the polymerization system at 6.0-11.0, taking an oxidation-reduction initiator system as an initiator, performing aqueous solution polymerization in the existence of a molecular weight regulator to obtain a porous elastomer, and drying and pulverizing the porous elastomer to obtain the ultrahigh-temperature polymer filtrate reducer, wherein the initial temperature of the reaction is 10-80 DEG C, and the polymerization is completed within 5-60 min. The apparent viscosity of 1% aqueous solution of the polymer filtrate reducer is 8-15 mPa.s. The polymer filtrate reducer has low production cost, high production speed, high production efficiency and stable quality. The ultrahigh-temperature polymer filtrate reducer has good filtrate reduction action under the conditions of 240 DEG C and saturated salt water, and the product has good water solubility and is convenient to apply in fields.

Description

Technical field: [0001] The invention relates to a polymer fluid loss reducer and a preparation method thereof, and belongs to the technical field of oilfield chemical drilling fluid treatment agents. technical background: [0002] With the increasingly complex formations encountered, there are more and more deep and ultra-deep wells, and the bottom hole temperature can reach ultra-high temperatures above 200°C. Under ultra-high temperature conditions, more stringent requirements are placed on the performance of drilling fluids. Fluid loss additives are It is one of the key treatment agents to ensure the performance of drilling fluid, so its performance is the key to ensure the performance of drilling fluid. The polymer fluid loss reducer currently used in the field has a high relative molecular weight. In order to reduce fluid loss in brine drilling fluid and high temperature conditions, it is necessary to increase the amount of addition. The adverse effect is that the visc...

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): C09K8/035C08F220/58C08F220/38C08F220/56C08F226/06C08F2/38C08F4/40
Inventor 王中华
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