Hydrogen sulfide corrosion resistant rubber composition for oil and gas fields

A rubber composition and hydrogen sulfide-resistant technology, which is applied in the field of rubber products, can solve problems such as the huge impact of hydrogen sulfide resistance, achieve excellent hydrogen sulfide corrosion resistance, excellent comprehensive performance, and improve the overall performance

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among many rubber sealing materials, tetrapropylene fluoride rubber has certain heat resistance and hydrogen sulfide resistance, and is usually used as a sealing material for downhole equipment in high-sulfur oil and gas fields, but its hydrogen sulfide resistance is greatly affected by its matching system. Resistant formulations cannot obtain rubber materials with high resistance to hydrogen sulfide

Method used

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  • Hydrogen sulfide corrosion resistant rubber composition for oil and gas fields
  • Hydrogen sulfide corrosion resistant rubber composition for oil and gas fields
  • Hydrogen sulfide corrosion resistant rubber composition for oil and gas fields

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example describes the comparative experimental situation of the hydrogen sulfide resistance performance of rubber compositions with different types of carbon nanotubes. The rubber composition is composed of the following components and parts by mass: 100 parts of tetrapropylene fluororubber, 1 part of sodium stearate, 2 parts of dicumyl peroxide, 2,2,4-trimethyl 1,2-dihydrogenated 1.5 parts of quinoline polymer, 35 parts of N550 carbon black, 10 parts of carbon nanotubes, 8 parts of triallyl cyanurate, and 2 parts of coumarone. The carbon nanotubes are single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs), both of which are 3nm in size, and armchair-shaped nanotubes are used. At a temperature of 100°C, the gas phase composition of 15MPa is 20%H 2 S, 5% CO 2 and 75%CH 4 , the results after 4 days of corrosion are shown in Table 1. It can be seen from Table 1 that the change rate of tensile strength and elongation at break of the rubb...

Embodiment 2

[0034] This example describes the comparative experimental situation of the hydrogen sulfide resistance performance of rubber compositions made of different types of single-walled carbon nanotubes. The rubber composition is composed of the following components and parts by mass: 100 parts of tetrapropylene fluororubber, 1.5 parts of sodium stearate, 4 parts of dicumyl peroxide, 2,2,4-trimethyl 1,2-dihydrogenated 2 parts of quinoline polymer, 35 parts of N550 carbon black, 10 parts of single-walled carbon nanotubes, 2 parts of triallyl cyanurate, 3.5 parts of coumarone. The single-walled carbon nanotubes are respectively armchair nanotubes, zigzag nanotubes and chiral nanotubes. At a temperature of 100°C, the gas phase composition of 15MPa is 20%H 2 S, 5% CO 2 and 75%CH 4 , the results after 4 days of corrosion are shown in Table 2. It can be seen from Table 2 that the tensile strength, elongation at break, and 100% modulus of the rubber composition added with armchair nano...

Embodiment 3

[0038] This example describes the comparative experimental situation of the hydrogen sulfide resistance performance of the rubber composition of armchair-shaped single-walled carbon nanotubes with different sizes. The rubber composition is composed of the following components and parts by mass: 100 parts of tetrapropylene fluororubber, 1.5 parts of sodium stearate, 6 parts of dicumyl peroxide, 2,2,4-trimethyl 1,2-dihydrogenated 3 parts of quinoline polymer, 35 parts of N550 carbon black, 10 parts of single-walled carbon nanotubes, 5 parts of triallyl cyanurate, and 5 parts of coumarone. Single-walled carbon nanotubes (SWCNTs) are all armchair-shaped carbon nanotubes with diameters of 0.6nm, 2nm, and 3nm. At a temperature of 100°C, the gas phase composition of 15MPa is 20%H 2 S, 5% CO 2 and 75%CH 4 , the results after 4 days of corrosion are shown in Table 3. It can be seen from Table 3 that the rubber composition with smaller armchair nanotubes has a better reinforcing eff...

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Abstract

The invention relates to the field of rubber products for oil and gas fields containing hydrogen sulfide, and discloses a hydrogen sulfide corrosion resistant rubber composition for oil and gas fields, which is composed of the following components by mass: 100 parts of a main material, 1-2 parts of a processing aid, 2-6 parts of a cross-linking agent, 1.5-4 parts of an anti-aging agent, 20-80 parts of a reinforcing filler, 2-20 parts of an anti-sulfur agent, 2-8 parts of an assistant cross-linking agent, and 2-5 parts of a flow modifier. The main body material is tetrafluoroethylene-propylene rubber; the cross-linking agent is an organic peroxide; the reinforcing filler is carbon black; the sulfur resisting agent is a carbon nano tube. The rubber composition obtained by taking the tetrafluoroethylene-propylene rubber as a main body material for reasonable composition has excellent comprehensive performance, and particularly, the carbon nanotubes are taken as an anti-sulfur agent, so that the rubber composition exerts excellent hydrogen sulfide corrosion resistance and can be successfully used in an oil and gas well environment with the temperature reaching 150 DEG C, the pressure reaching 70 MPa and the hydrogen sulfide partial pressure reaching 15 MPa.

Description

technical field [0001] The invention relates to the field of rubber products used in hydrogen sulfide-containing oil and gas fields, in particular to a rubber composition used in oil and gas fields resistant to hydrogen sulfide corrosion. Background technique [0002] In recent decades, oil and gas fields containing hydrogen sulfide corrosive media have appeared one after another, and the corrosion problem has attracted more and more attention. Corrosion not only causes huge economic losses to the development and production of oil and gas fields, but also causes environmental pollution and threatens personal safety. In the early 1980s, my country's proven natural gas containing hydrogen sulfide accounted for 1 / 4 of the country's gas reservoir reserves. In recent years, high-sulfur oil and gas fields have been continuously discovered in my country's exploration work. The emergence of high-sulfur oil and gas fields in the petroleum industry not only puts forward resistance t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L45/02C08K13/02C08K5/098C08K5/14C08K5/3475C08K3/04C08K5/3492C08K5/12
CPCC08L27/18C08K13/02C08K5/098C08K5/14C08K5/3475C08K3/04C08K3/041C08K5/34924C08K5/12C08K2201/011C08K2201/003C08K2201/014C08L2201/08C08L45/02
Inventor 张全胜李娜吕玮李玉宝李明张连煜田浩然张建
Owner CHINA PETROLEUM & CHEM CORP
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