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

Coating type crosslinker and preparation method and application thereof

A technology of cross-linking agent and coating type, which is applied in the field of coating type cross-linking agent and its preparation, can solve the problems such as the lack of slow cross-linking of the redox system, the reduction of the injection capacity in the water flooding stage, and the blockage of the wellbore near the wellbore. , to achieve the effects of controllable gel strength, long gel time and easy operation

Inactive Publication Date: 2011-07-20
RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These cross-linking agents have the following shortcomings or deficiencies: 1. The redox system basically does not have the effect of slowing cross-linking, and the currently used organic acid chromium delays cross-linking time is limited, and there is a certain risk in field application; 2. In the field oil displacement test In some well areas, the wellbore and the near-well area are blocked, which leads to the problem that the injection capacity of the subsequent water flooding stage is reduced; The problem of excessive pressure increase during the injection of the profile control agent; 4. The function of delaying cross-linking is weak

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Accurately weigh raw materials: 1 kg chromium lactate, 0.4 kg deionized water, 70 kg liquid paraffin, 80 kg cyclohexane, 0.3 kg ethylenediamine, 0.12 kg sorbitan monostearate, 0.15 kg octane Phenol polyoxyethylene (10) ether, 1.2 kilograms of toluene 2,4-diisocyanate.

[0023] Preparation method: add chromium lactate into deionized water at room temperature, stir well to prepare chromium lactate aqueous solution A; then add ethylenediamine to solution A, stir evenly at 20 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 5 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a stirring speed of 50 rpm, the abo...

Embodiment 2

[0025] Accurately weigh raw materials: 2 kg of chromium lactate, 2.5 kg of deionized water, 80 kg of liquid paraffin, 90 kg of cyclohexane, 1 kg of ethylenediamine, 0.5 kg of sorbitan monostearate, 0.4 kg of octane Alkylphenol polyoxyethylene (10) ether, 2 kilograms of toluene 2,4-diisocyanate.

[0026] Preparation method: add chromium lactate into deionized water at room temperature, stir evenly, and prepare chromium lactate aqueous solution A; then add ethylenediamine into solution A, and stir evenly at 50 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 10 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a st...

Embodiment 3

[0028] Accurately weigh raw materials: 3 kg of chromium lactate, 7 kg of deionized water, 100 kg of liquid paraffin, 100 kg of cyclohexane, 2 kg of ethylenediamine, 1 kg of sorbitan monostearate, 1 kg of octane Alkylphenol polyoxyethylene (10) ether, 4 kg of toluene 2,4-diisocyanate.

[0029] Preparation method: add chromium lactate into deionized water at room temperature, stir well to prepare chromium lactate aqueous solution A; then add ethylenediamine to solution A, stir evenly at 100 rpm to obtain solution B; then in solution B First add liquid paraffin, then add sorbitan monostearate and octylphenol polyoxyethylene (10) ether, and stir at a stirring speed of 1000 rpm for 30 minutes to obtain emulsion C; Toluene 2,4-diisocyanate was added dropwise to the emulsion C, and the dropwise addition was completed within 10 minutes, and the stirring reaction was carried out at a stirring speed of 100 rpm for 50 minutes to obtain a semi-finished product; at a stirring speed of 50 r...

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 discloses a coating type crosslinker and a preparation method and application thereof. The coating-type crosslinker is prepared by using toluene-2,4-diisocyanate as an oil-soluble monomer, whiteruss as an oil phase, ethanediamine as a water-soluble monomer, organic acid chrome aqueous solution as a core material and octyl phenol polyoxyethylene (10) ether and sorbitol anhydride monostearate as emulsifiers. A crosslinking polymer system formed by the crosslinker and a suitable polymer has long gelatinizing time and high and controllable gelatinizing strength and can enter the deep part of stratum to achieve the aim of deep profile control or profile modification.

Description

technical field [0001] The invention relates to an oil field chemical agent and its preparation method and application, in particular to a coated crosslinking agent and its preparation method and application. Background technique [0002] The cross-linking agents currently used in oil fields mainly include high-valent metal ions such as: Cr 3+ 、Al 3+ 、Ti 3+ , Aldehydes such as: formaldehyde and resins such as: phenolic resin, etc. Cr 3+ , the applied product is a redox system, mainly a mixture of dichromate and reducing agent and organic acid chromium; the organic acid chromium is mainly chromium lactate and chromium malonate. Publication number is that the Chinese patent of CN1560119A discloses a kind of " preparation method of slow cross-linking agent for polyacrylamide gel ", and the slow cross-linking agent of its preparation is sodium dichromate, concentrated sulfuric acid, sodium sulfite, humic acid, acetic acid, Citric acid, 40% sodium hydroxide solution, and wat...

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): C08G18/76C08G18/32C08K5/103C08K5/098C08K5/06C08L33/26C08L75/02C09K8/42C09K8/588
Inventor 汪庐山刘承杰罗跃靳彦欣贾庆升胡秋平徐鹏辛爱渊
Owner RES INST OF PETROLEUM ENG SHENGLI OIL FIELD SINOPEC
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