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A kind of epoxy mortar for offshore oil and gas pipeline repair and preparation method thereof

An oil and gas pipeline and epoxy mortar technology, which is applied in the application field of polymer mortar, can solve the problems of repairing and strengthening of concrete coatings for difficult pipelines, easy corrosion of mortar mixtures, low compressive and impact strength, etc. Low viscosity, wide ratio effect

Active Publication Date: 2016-03-02
TIANJIN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing mortar mixture is easily corroded in the special environment of the seabed, the bond strength is low, the compressive and impact strength is low, and it is difficult to repair and reinforce the damaged pipeline concrete coating, providing An epoxy mortar for repairing offshore oil and gas pipelines and its preparation method are disclosed. The epoxy mortar has excellent performances such as compression resistance, impact resistance, seepage resistance, and seawater corrosion resistance, and can be applied to the bonding of special coatings for offshore oil and gas pipelines. and repair, as well as pouring and thin-layer repair and reinforcement of underwater concrete structures

Method used

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  • A kind of epoxy mortar for offshore oil and gas pipeline repair and preparation method thereof
  • A kind of epoxy mortar for offshore oil and gas pipeline repair and preparation method thereof
  • A kind of epoxy mortar for offshore oil and gas pipeline repair and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Prepare the following materials in parts by weight:

[0028]

[0029] Wherein, the quartz sand is prepared from fine sand with a particle size of 0.3 mm to 0.5 mm, medium sand with a particle size of 1 mm to 2 mm, and coarse sand with a particle size of 2 mm to 4 mm in a weight ratio of 1:1:1. .

[0030]The parts by weight are respectively 65 parts of bisphenol A type epoxy resin E44, 65 parts of bisphenol A type epoxy resin E51, 13 parts of AGE, 13 parts of DBP and 6 parts of phenol are mixed, stirred to homogeneous phase, According to the temperature conditions, heat in a water bath at 40°C to promote uniform stirring, then add 1 part by weight of defoamer and let it stand for 1 to 2 minutes, then add 33 parts by weight of T31-3 type modified phenalkamine curing agent Mix the curing agent with 32 parts of NP440 amidoamine curing agent, stir evenly, pour it into the aggregate for mixing after 3 minutes to 5 minutes, and start the construction operation after mixing...

Embodiment 2

[0033] Prepare the following materials in parts by weight:

[0034]

[0035] Wherein, the quartz sand is prepared from fine sand with a particle size of 0.3 mm to 0.5 mm, medium sand with a particle size of 1 mm to 2 mm, and coarse sand with a particle size of 2 mm to 4 mm in a weight ratio of 1:1:1. .

[0036] The parts by weight are respectively 65 parts of bisphenol A type epoxy resin E44, 65 parts of bisphenol A type epoxy resin E51, 13 parts of AGE, 13 parts of DBP and 6 parts of phenol are mixed, stirred to homogeneous phase, According to the temperature conditions, heat in a water bath at 30°C to promote uniform stirring, then add 1 part by weight of defoamer and let it stand for 1min to 2min, then add 44 parts by weight of T31-3 type modified phenalkamine curing agent Mix the curing agent with 22 parts of NP440 amidoamine curing agent, stir evenly, pour it into the aggregate for mixing after 3 minutes to 5 minutes, and start the construction operation after mixing ...

Embodiment 3

[0039] Prepare the following materials in parts by weight:

[0040]

[0041] Wherein, the quartz sand is prepared from fine sand with a particle size of 0.3 mm to 0.5 mm, medium sand with a particle size of 1 mm to 2 mm, and coarse sand with a particle size of 2 mm to 4 mm in a weight ratio of 1:1:1. .

[0042] The parts by weight are respectively 85 parts of bisphenol A type epoxy resin E44, 86 parts of bisphenol A type epoxy resin E51, 34 parts of AGE, 17 parts of DBP and 8 parts of phenol mix, stir until homogeneous, According to the temperature conditions, heat in a water bath at 40°C to promote uniform stirring, let it stand for 1min to 2min, and then add 34 parts by weight of T31-3 type modified phenalkamine curing agent and 51 parts of NP440 type amidoamine curing agent. Mix the curing agent composed of curing agent, stir evenly, pour it into the aggregate for mixing after 3 minutes to 5 minutes, and start the construction operation after mixing evenly after 3 minut...

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Abstract

The invention discloses an epoxy mortar used for repairing sea oil gas pipeline and a preparation method thereof, which belongs to the technical field of polymer mortar application. The epoxy mortar is composed of a component A, a component B and a component C, the component A is prepared by bisphenol A epoxy resin E44, E51 and a certain amount of auxiliary agent, the component B is prepared by mixing a T31-3 type modified phenolic amine curing agent and a NP440 amidoamines curing agent according to a certain proportion, and the component C is an aggregate by mixing cement and quartz sand according to a certain proportion. The preparation method comprises the following steps: heating the component A to the temperature of 30-50 DEG C, stirring to homogeneous phase, then mixing the component A and the component B according to a certain proportion, uniformly mixing, adding the component C according to a certain proportion, and uniformly blending to obtain the epoxy mortar. The preparation method has simple technology, the epoxy mortar has strong cohesiveness, the epoxy mortar through solidification has excellent anti-compression, anti-punching and anti-seawater corrosion performances, and the epoxy mortar can be used for repairing and reinforcing a concrete coating on the sea oil gas pipeline and a thin layer of an underwater concrete structure.

Description

technical field [0001] The invention belongs to the technical field of polymer mortar application, and in particular relates to an epoxy mortar used for repairing offshore oil and gas pipelines and a preparation method thereof, so as to meet the high strength and excellent seawater corrosion resistance required by the marine environment. Background technique [0002] Due to the long-term immersion of offshore oil and gas pipelines in the special environment of the seabed, on the one hand, seawater is highly corrosive, and the concrete coating on the pipeline is easily corroded by seawater, resulting in cracks, so that the inner pipe is directly exposed to seawater and washed by seawater. Easily broken, causing leaks. On the other hand, due to the extreme pressure on the seabed, the pipeline is vulnerable to the high-strength impact of seawater and may fall off and be damaged, resulting in serious economic losses. Therefore, the requirements for the compressive performance of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B26/10
Inventor 王志刚唐娜刘海超程鹏高赵利张蕾李长春祝利善王铭浩王飞陆娟
Owner TIANJIN UNIV OF SCI & TECH
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