Pressure-difference-activated sealant and preparation method thereof

A sealant and activator technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of expensive, time-consuming, easy-to-damage pipe fittings, etc., and achieve the effect of safe use

Active Publication Date: 2014-11-19
古莱特科技股份有限公司
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex use environment, many pipe fittings such as wellhead tubing, casing, casing hanger, safety valve, and subsea control system a

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
  • Pressure-difference-activated sealant and preparation method thereof
  • Pressure-difference-activated sealant and preparation method thereof
  • Pressure-difference-activated sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A differential pressure activated sealant, the composition and quality of its raw materials are:

[0026] The mass of styrene-butadiene latex is 15g; sodium chloride 1.5g; butadiene and styrene prepolymer 10g (polymerization degree 80-120); styrene 1g; butadiene 0,5g; Gemini1231 surfactant 6g; water 66g .

[0027] The preparation method of the present invention is as follows: add styrene-butadiene latex into water under stirring, control the stirring speed at 1500 rpm and add sodium chloride dropwise. Polymer, styrene and butadiene monomer, stirred for 30min.

Embodiment 2

[0029] There is no latex monomer in this embodiment, because the molecular weight distribution of natural latex is wide, and it is also possible without latex monomer.

[0030] A differential pressure activated sealant, the composition and quality of its raw materials are:

[0031] The quality of natural rubber latex is 15g; sodium chloride 2g; isoprene prepolymer 8g (polymerization degree 80-120); 25% Gemini1631 and OP-40 surfactant compound system 8g; water 68g.

[0032] The preparation method of the present invention is: add natural rubber latex into water under stirring, control the stirring speed at 1500 rpm to add sodium chloride dropwise, after the dropwise addition, add OP-10 with a mass concentration of 25% and cationic Gemini1631 compounded after 15 minutes of reaction After the surfactant terminates the reaction, after the addition is completed, the prepolymer is added and stirred for 30 minutes to obtain the present invention.

[0033] The weight ratio of OP-10:ca...

Embodiment 3

[0035] A differential pressure activated sealant, the composition and quality of its raw materials are:

[0036] The quality of polyacrylate latex is 12g; magnesium sulfate 0.3g; acrylate prepolymer 10g (polymerization degree 150-200); butyl acrylate 1g; ethyl acrylate 1.2g; mass concentration 10wt% didodecanyl disulfate Sodium 8g solution; water 67.5g.

[0037] The preparation method of the present invention is: add polyacrylate latex into water under stirring, control the stirring speed at 2500 rpm to add magnesium sulfate dropwise, after the dropwise addition is completed, add 10% sodium didodecyl disulfate in mass concentration after 15 minutes of reaction After the reaction is terminated, after the addition is complete, the prepolymer, butyl acrylate and ethyl acrylate monomers are added and stirred for 30 minutes to obtain the present invention.

[0038] Verify the use effect of the present invention by comparative example below:

[0039] Use 9-5 / 8"casing thread to des...

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 relates to a pressure-difference-activated sealant and a preparation method thereof. The sealant is composed of rubber latex, a rubber latex prepolymer, a latex monomer, an activator, a terminating agent, and water. With the sealant, sealing can only be realized under a condition with pressure difference. The main components of the sealant are rubber latex, the rubber latex prepolymer, the monomer, an initiator, and the activator. The sealant only solidifies at a leak point with a pressure difference, and can maintain a normal fluid status at any other conditions. When sealing is finished, superfluous sealant is returned to the ground. The sealant does not block pipelines and liquid delivery systems. The sealant does not harm electronic component systems and metal seals, and does not react with them. Because the sealant only begins to polymerize into a tough solid under the condition with enough pressure difference, the polymerization reaction is not caused by sealant injection time, in-well temperature, and in-well environmental pressure factors.

Description

technical field [0001] The invention belongs to the field of leak sealing in oil and natural gas systems, in particular to a differential pressure activated sealant and a preparation method thereof. Background technique [0002] Oil and gas production systems are complex and include wells, streamlines, subsea and dry sub-systems, production platforms and export lines. Due to the complex environment of use, many pipe fittings such as wellhead tubing, casing, casing hanger, safety valve, and subsea control system are easily damaged. Using traditional maintenance methods to maintain the system is time-consuming, expensive, and has a great impact on production. This raises the question of whether damaged tubulars can be repaired with a reliable remote repair or easily accessible workover. [0003] The self-healing of human trauma and bleeding is the most ideal way to solve oil well leakage. Can there be a substance like blood that only coagulates at the wound, that is, only a...

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
IPC IPC(8): C08L9/08C08L7/02C08L33/04C08L47/00C08K5/01C08K3/16C08K5/101C09K3/12
Inventor 郭丽梅
Owner 古莱特科技股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap