Preparation method of epoxy mortar for filling ocean oil and gas pipeline

A technology for oil and gas pipelines and epoxy mortar, which is applied in the field of epoxy mortar for filling offshore oil and gas pipelines and its preparation, can solve the problem of difficult pipeline joints and timely bonding of pipeline anode filling, low bonding strength and compressive impact strength, The mortar mixture is easy to be corroded and other problems, so as to achieve the effect of fast curing speed, reduced fluidity and strong cohesion

Inactive Publication Date: 2014-05-28
TIANJIN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the existing technical defects, aiming at the fact that the current mortar mixture is easily corroded in the special environment of the seabed, the bonding strength and compressive and impact strength are low, the initial setting time is long, and it is difficult to carry out the joint of the pipeline. In order to solve problems such as timely bonding and filling at the anode of the pipeline, a new type of filled high-performance epoxy mortar for offshore oil and gas pipelines and its preparation method are proposed

Method used

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  • Preparation method of epoxy mortar for filling ocean oil and gas pipeline
  • Preparation method of epoxy mortar for filling ocean oil and gas pipeline
  • Preparation method of epoxy mortar for filling ocean oil and gas pipeline

Examples

Experimental program
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Effect test

example 1

[0017] Example 1: prepare the following substances according to mass percentage:

[0018]

[0019] Mix 6.5% E44, 6.5% E51, 1.3% AGE, 1.3% DBP and 0.6% phenol, stir until homogeneous, heat in a water bath to promote uniform stirring according to temperature conditions, then add a small amount of defoamer and let it stand for 1min to 2min , and then add 6.5% T31-3 type curing agent to it, stir evenly, after a few minutes, pour it into the aggregate and mix for 3min~5min, until it is uniform, the construction operation can be carried out. Aggregate is made of 19.4% cement and 58.2% quartz sand, of which the quartz sand is composed of fine sand with a particle size of 0.3mm to 0.5mm, medium sand with a particle size of 1mm to 2mm and fine sand with a particle size of 2mm to 4mm. Coarse sand is prepared in a ratio of 1:1:1.

[0020] The obtained mortar has the following properties: the initial setting time is 28 minutes, the 1-day compressive strength is 59.6MPa, the 7-day comp...

example 2

[0021] Example 2: prepare the following substances according to mass percentage:

[0022]

[0023] Mix 8.6% E44, 8.6% E51, 2.6% AGE, 1.7% DBP and 0.8% phenol, heat in a water bath to about 40°C, stir with a mixer until homogeneous, then add a small amount of defoamer and let it stand for 1min to 2min, then Add 8.6% T31-3 curing agent into it, stir evenly, then pour 46% cement and 23% quartz sand mixture into it, and stir for 3-5 minutes to obtain the epoxy mortar of the present invention. Among them, the quartz sand is prepared by fine sand with a particle size of 0.3 mm to 0.5 mm and coarse sand with a particle size of 1 mm to 2 mm in a ratio of 1:1.

[0024] The obtained mortar has the following properties: the initial setting time is 30min, the 1-day strength is 55.1MPa, the 7-day strength is 62.4MPa, the 28-day compressive strength is 72.8MPa, the 28-day flexural strength is 12.9MPa, and the viscoelasticity after 28 days of molding The junction strength is 6.3MPa, the ...

example 3

[0025] Example 3: prepare the following substances according to mass percentage:

[0026]

[0027] Mix 7.4% E44, 7.4% E51, 1.5% AGE, 1.5% DBP and 0.7% phenol, stir until homogeneous, heat in a water bath according to temperature conditions to promote uniform stirring, then add a small amount of defoamer and let it stand for 1min to 2min , and then add 7.4% T31-3 type curing agent to it, stir evenly, after a few minutes, pour it into the aggregate and mix for 3min~5min, until it is uniform, the construction operation can be carried out. Aggregate is made by mixing 49.4% cement and 24.7% quartz sand, wherein the quartz sand is prepared in a ratio of 1:1 from fine sand with a particle size of 0.3 mm to 0.5 mm and coarse sand with a particle size of 1 mm to 2 mm.

[0028]The obtained mortar has the following properties: the initial setting time is 25min, the compressive strength is 56.3MPa in 1 day, the compressive strength in 7 days is 61.2MPa, the compressive strength in 28 d...

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Abstract

The invention belongs to the technical field of application of polymer mortar and particularly relates to a preparation method of epoxy mortar for filling an ocean oil and gas pipeline. The epoxymortar consists of a component A, a component B and a component C, wherein the component A is prepared by defoaming after blending epoxy resin, a reactive diluent, a plasticizer, an accelerator and pigments according to the proper proportion and; the component B is a special underwater T31-3 type curing agent; the component C is aggregate formed by mixing cement with quartz sand according to a certain proportion. When the epoxymortar is used for construction, the component A is heated to 30-50DEG C and stirred to homogeneousphase, and then the component A and the component B are mixed according to certain proportion and uniformly stirred; the component C is subsequently added into the mixture for uniformly blending to obtain an epoxymortar mixture for filling the ocean oil and gas pipeline. The mortar mixture is simple in preparation process; the prepared mixture has the advantages of high curing speed and strong cohesiveness as well as excellent compress and shock resistance and seawater corrosion resistance. The mortar mixture can be used for filling and strengthening an anode protection anticorrosive structure of the ocean oil and gas pipelines.

Description

technical field [0001] The invention belongs to the technical field of polymer mortar applications, and in particular relates to an epoxy mortar for filling offshore oil and gas pipelines and a preparation method thereof. It is applied to the filling and reinforcement of special structures of offshore oil and gas pipelines, especially pipeline anodic protection anticorrosion structures. Background technique [0002] Offshore oil and gas pipelines have been immersed in the special environment of the seabed for a long time. The surroundings of pipeline sacrificial anodes are easily corroded by seawater, and are easily impacted by high-intensity seawater, resulting in serious consequences and potential safety hazards. Reinforcement repair. However, to strengthen these structures according to the traditional method cannot meet the special environmental requirements, and must meet the requirements of rapid curing, high compressive impact strength and high cohesiveness. The bond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B24/28C04B111/74
Inventor 唐娜王志刚张蕾刘海超程鹏高贾振王飞祝利善赵利纪亮
Owner TIANJIN UNIV OF SCI & TECH
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