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

Phosphonic acid group-containing polymer viscosity reducer and preparation method thereof

A polymer, phosphonic acid-based technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of limiting the ability of polymers to resist salt and calcium, the total yield of the synthesis reaction is low, and the content of phosphorus elements is limited, etc. Achieving good viscosity reduction effect, simple synthesis process, strong resistance to salt and high-valent metal ions

Pending Publication Date: 2022-07-01
中石化石油工程技术服务有限公司 +2
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN103665263B-A kind of phosphonic acid group-containing polymer and its application and phosphonic acid group-containing polymer drilling fluid viscosity reducer have good high temperature viscosity reduction effect in drilling fluid, but the organic phosphonic acid monomer involved is 2- Acrylamido-2-methylpropionic acid (AMPP), the synthetic technique of this monomer reported in the literature is comparatively difficult, and the total yield of synthetic reaction is lower, about 60%, and cost is higher, is difficult to industrialized production
Inorganic phosphate is used as the end cap of the polymer in the raw material, and the content of phosphorus element introduced is very limited, which limits the improvement of the salt calcium resistance of the polymer

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
  • Phosphonic acid group-containing polymer viscosity reducer and preparation method thereof
  • Phosphonic acid group-containing polymer viscosity reducer and preparation method thereof
  • Phosphonic acid group-containing polymer viscosity reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The invention provides a preparation method of a phosphonic acid group-containing polymer viscosity reducer, comprising the following steps:

[0035] It is obtained by polymerizing the isopropenyl phosphoric acid monomer A and the sulfonic acid group-containing monomer B in the presence of an initiator and a molecular weight regulator.

[0036] The preparation method is preferably specifically:

[0037] The isopropenylphosphonic acid monomer A and the sulfonic acid group-containing monomer B are mixed and dissolved to prepare an aqueous solution according to the mass ratio of (0.2-0.65): (0.35-0.8).

[0038] The propylene phosphoric acid monomer of the present invention is IPPA, which is not limited in the present invention, as long as those skilled in the art are familiar with it.

[0039] Isopropylene phosphonic acid is an organic phosphonic acid. Phosphonic acid polymers have excellent calcium resistance and better temperature and salt resistance than sulfonate pol...

Embodiment 1

[0057] Mix isopropenylphosphonic acid (IPPA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS) according to the substance ratio of 35%:65% to prepare a monomer mixture with a mass fraction of 30% aqueous solution, and isopropanol (IPA) accounting for 1% of the total mass of the monomer mixture was added to the aqueous monomer mixture solution, and the temperature was raised to 60°C. Then, potassium persulfate, which accounts for 1.5% of the total monomer mass, was dissolved in clear water, added to the reaction system, and then the system was heated to 75 °C for 5 h. After the reaction, the pH value was adjusted to 8 with sodium hydroxide to obtain micro Viscous liquid, dried and crushed to contain organic phosphoric acid viscosity reducer.

Embodiment 2～8

[0059] According to the method of embodiment 1, prepare organic phosphonic acid polymer viscosity reducer respectively; Different formulas and conditions are shown in Table 1:

[0060] Material dosage and reaction conditions of polymerization reaction in the embodiment 2-9 of table 1

[0061]

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 a phosphonic acid group-containing polymer viscosity reducer. The phosphonic acid group-containing polymer viscosity reducer comprises a structural unit as shown in a formula (I) and a structural unit as shown in a formula (II), wherein R1 and R2 are respectively and independently H or a C1-C5 straight chain or branched chain alkyl group, and R3 is a C1-C5 straight chain or branched chain alkylene group. The organic phosphonic acid polymer disclosed by the invention simultaneously contains a phosphonic acid group and a sulfonic acid group, so that the organic phosphonic acid polymer has relatively high salt resistance and high-valence metal ion resistance, and the organic phosphonic acid polymer still has a relatively good viscosity reduction effect after being aged at high temperature in a fresh water drilling fluid and a calcium chloride composite brine drilling fluid; the polymer aqueous solution has a high viscosity retention rate through salt resistance evaluation and calcium resistance evaluation. Therefore, the organic phosphonic acid polymer viscosity reducer has good temperature resistance, viscosity reduction, salt resistance and calcium resistance. The polymer viscosity reducer is few in reaction raw materials and simple in synthesis process.

Description

technical field [0001] The invention relates to the technical field of treatment agents for oilfield drilling fluids, in particular to a phosphonic acid group-containing polymer viscosity reducer and a preparation method thereof. Background technique [0002] In the drilling process, viscosity reducers play a very important role in reducing the viscosity and shear force of the drilling fluid, controlling the rheology of the drilling fluid, and increasing the drilling speed. [0003] During the drilling of deep wells and ultra-deep wells, due to the long-term high temperature of the drilling fluid, there are influences such as high-temperature dispersion of clay, high-temperature degradation of organic polymer compounds, and high-temperature cross-linking of treatment agents, resulting in poor rheological properties of the drilling fluid. In the early days, people generally used viscosity reducer products such as inorganic phosphates, tannins, and iron lignosulfonates (FCLS)....

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): C08F220/58C08F230/02C08F228/02C08F212/14C09K8/035
CPCC08F220/585C08F230/02C08F228/02C09K8/035C08F212/30
Inventor 孙举孟丽艳苏雪霞徐生婧梁庆磊
Owner 中石化石油工程技术服务有限公司
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