The influence of functional ingredients on the technological  properties of water-oil-swelling rubber sealing elements

The article examines the influence of the nature and content of caoutchoucs, sevilen, vulcanizing group, fillers, plasticizers, directional ingredients on the technological properties (plasticity, annular modulus, density, start time of vulcanization, stickiness) of two rubber compounds. The study was conducted in order to select the basis of rubber mixtures for the manufacture of the outer and inner layers of water-oil-swellable sealing elements (SWOE) for the oil and gas extraction industry. It was established that the rubber mixture for the outer layer of SWOE on the basis of butadiene-nitrile BNKS-18AMN, isoprene SKI-3 and butadiene SKD caoutchoucs, and also the rubber mixture for the inner layer of SWOE on the basis of butadiene-nitrile BNKS-18AMH, butadiene-methyl styrene SKMS-30ARK and butadiene SKD caoutchoucs have satisfactory technological properties. It was shown that these rubber mixtures containing sevilen 11808-340, a vulcanizing group (sulfur + thiazole 2 MBS + guanid F), a combination of fillers (carbon black P 514 + grew 175 + talc + Karelit MK), petroleum resin "Sibplast", directional ingredients (vermiculite + needle punched cloth “Oxypan”), sorption additives (polyacrylamide AK 639 + sodium polyacrylate + perlite + reagent “Kometa-R” + modified silica gel), are characterized by improved technological properties. These rubber compounds can be recommended as the basis for the manufacture of the outer and inner layers of water-oil-swelling sealing elements.

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The influence of functional ingredients on the technological properties of water-swelling rubber sealing elements

Butlerov Communications ◽

10.37952/roi-jbc-01/19-58-6-146 ◽

2019 ◽

Vol 58 (6) ◽

pp. 146-151

Author(s):

Evgeny N. Egorov ◽

◽

Nikolay F. Ushmarin ◽

Konstantin V. Efimov ◽

Sergey I. Sandalov ◽

...

Keyword(s):

Oil And Gas ◽

Oil And Gas Industry ◽

Technological Properties ◽

Start Time ◽

Gas Industry ◽

Functional Ingredients ◽

Ethylene Propylene ◽

Rubber Compounds ◽

Water Swelling ◽

Sealing Elements

The article investigated the influence of the nature and content of coutchoucs, sevilens, vulcanizing groups, fillers, plasticizers, ingredients of directional action on the technological properties (plasticity, ring modulus, density, start time of vulcanization, stickiness) of two rubber mixtures. These indicators characterize the processability of rubber compounds in the manufacture of products from them. The study was conducted in order to select the basis of rubber compounds for the manufacture of the outer and inner layers of water-swellable sealing elements (WSSE). It has been established that rubber compounds for the outer layer based on butadiene-nitrile BNKS-18AMN, isoprene SKI-3 and ethylene-propylene SKEPT-40 coutchoucs, as well as the inner layer of WSSE based on butadiene-nitrile BNKS-18AMN, butadiene methylstyrene SKMS-30ARK and ethylene-propylene SKEPT-40 rubbers possess satisfactory technological properties. It was shown that these rubber mixtures which contain sevilen 11808-340, a vulcanizing group (sulfur + thiazole 2 MBS + guanid F), a combination of fillers (talc + grew 175 + Karelite MK), petroleum resin Sibplast, directional ingredients (vermiculite + needle punched cloth “Oksipan”), hydrosorption additives (polyacrylamide AK 639 + sodium polyacrylate), have improved technological properties. These rubber mixtures can be recommended as the basis for the manufacture of the outer and inner layers of water-swelling sealing elements for the oil and gas industry.

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Influence of magnesium hydrosilicate on the properties plantar rubber

Butlerov Communications ◽

10.37952/roi-jbc-01/20-61-1-91 ◽

2020 ◽

Vol 61 (1) ◽

pp. 91-95

Author(s):

Konstantin V. Efimov ◽

◽

Lyudmila Yu. Tsareva ◽

Nikolay F. Ushmarin ◽

Nikolay I. Koltsov ◽

...

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Practical Interest ◽

Physical And Mechanical Properties ◽

Rubber Mixture ◽

Rubber Compounds ◽

Developed Surface ◽

The Cost ◽

Methyl Styrene ◽

Styrene Butadiene

The properties of rubber products are determined by the nature and content of caoutchoucs, vulcanizing systems and other ingredients. Among them, fillers play an important role. The most common fillers are carbon black and silicas. Recently, in connection with the increasing operational requirements for rubber products, additives of special fillers began to be introduced into rubber mixtures. Among them, silicates are of practical interest, the use of which allows not only to reduce the cost, but also to give qualitatively new useful physical and mechanical properties to rubbers. Improving the physical and mechanical properties of rubbers directly depends on the particle size of the fillers. Fillers with a smaller particle size have a larger surface area and have a significant effect on the physical and mechanical properties of rubbers. The highly developed surface of powdered magnesium hydrosilicate suggests its use as a filler for rubber compounds. In this regard, it is of interest to study the effect of magnesium hydrosilicate on the properties of rubbers. This article explored the possibility of using magnesium hydrosilicate in plantar rubber based on a combination of nitrile butadiene SKN-4055, methyl styrene butadiene SKMS-30ARK and isoprene SKI-3 caoutchoucs. The rheometric properties were investigated for the rubber mixture, and the physical and mechanical properties, hardness, resistance to thermal aging and the action of aggressive media were determined for vulcanizates. As a result of the studies, it was found that the best rheometric, physico-mechanical and operational properties are possessed by the vulcanizate of the rubber compound, in which the silicon-acid filler of rossil 175 was partially replaced by magnesium hydrosilicate. This rubber can be used in the production of oil and petrol resistant soles of rubber shoes.

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The influence of functional ingredients on the physico-mechanical and operational properties of rubbers for water-swelling sealing elements

Butlerov Communications ◽

10.37952/roi-jbc-01/19-58-6-152 ◽

2019 ◽

Vol 58 (6) ◽

pp. 152-157

Author(s):

Evgeny N. Egorov ◽

◽

Nikolay F. Ushmarin ◽

Konstantin V. Efimov ◽

Sergey I. Sandalov ◽

...

Keyword(s):

Tensile Strength ◽

Oil And Gas ◽

Oil And Gas Industry ◽

Weight Changes ◽

Gas Industry ◽

Elongation At Break ◽

Ethylene Propylene ◽

Water Swelling ◽

Methyl Styrene ◽

Sealing Elements

The article investigated the effect of caoutchoucs, sevilen 11808-340, vulcanizing groups, fillers, plasticizers, directional ingredients on the physicomechanical (conditional tensile strength, elongation at break, hardness, rebound elasticity, tear resistance) and operational properties of two rubbers (changes of conditional tensile strength of rubbers after exposure to water, weight changes after aging of rubbers in a solution of citric and hydrochloric acids, changes in the volume of rubbers after exposure to water). These rubbers are developed for the manufacture of the outer and inner layers of water-swelling sealing elements (WSSE) for the oil and gas industry. It has been established that rubber for the outer layer of WSSE based on butadiene-nitrile BNKS-18AMN, isoprene SKI-3 and ethylene-propylene SKEPT-40 caoutchoucs, as well as rubber for the inner layer of WSSE based on butadiene-nitrile BNKS-18AMN, butadiene-methyl styrene SKMS-30AR and ethylene-propylene SKEPT-40 caoutchocs possess the required physical-mechanical and operational properties. It was shown that these rubbers containing a vulcanizing group sulfur + thiazole 2 MBS, sevilen 11808-340, a combination of carbon black T 900 with rosil 175, talc and Karelite MK, petroleum resin “Sibplast”, vermiculite and igloprobivnoe cloth, a combination of hydrosorbtional polyacrylamide 639, sodium polyacrylate, perlite and Kometa-R reagent are characterized by improved physicomechanical and operational properties. These rubbers can be recommended as the basis for the manufacture of the outer and inner layers of water-swellable sealing elements.

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Influence of technological additive TsD-12 on the properties of heat-aggressive resistant rubber for sealing elements

Butlerov Communications ◽

10.37952/roi-jbc-01/20-64-10-94 ◽

2020 ◽

Vol 64 (10) ◽

pp. 94-97

Author(s):

Ivan S. Spiridoniv ◽

◽

Nikolay F. Ushmarin ◽

Nadezhda A. Semenova ◽

Sergey I. Sandalov ◽

...

Keyword(s):

Mechanical Properties ◽

Oil And Gas ◽

Physical And Mechanical Properties ◽

Oil And Gas Industry ◽

Butadiene Rubber ◽

Rubber Mixture ◽

Gas Industry ◽

Uniform Dispersion ◽

Zinc Salts ◽

Sealing Elements

The article presents the results of a study of the effect of the technological active additive СD-12, which is a combination of zinc salts of fatty acids, on the physical and mechanical properties and resistance to aggressive media of rubber for sealing elements of packer-anchor equipment. The rubber mixture was prepared on the basis of hydrogenated nitrile-butadiene rubber Therban 3406, vulcanizing agent Novoperox BP-40, coagents for vulcanization of zinc monomethacrylate and oligoester acrylates MGF-9 and TGM-3, antioxidants Naugard 445 and agidol-2, fillers of technical carbon P 514 and T 900, filler dispersant stearic acid, rosin softener and other ingredients. To stabilize the physical and mechanical properties of vulcanizates, uniform dispersion of rubber components, reduce viscosity and improve vulcanization properties, a technological additive CD-12 was also introduced into the rubber mixture. The rubber mixture was prepared in a laboratory SKI-3L rubber mixer at a temperature not exceeding 70 °C for 7 min. The resulting mixture was vulcanized on a PV-100-2RT-2-PCD vulcanization press at a temperature of 150 °C for 60 minutes and then further vulcanized in a thermostat at a temperature of 160 °C for 6 hours. For the obtained vulcanizates, the physical and mechanical properties and resistance to the action of aggressive media were determined according to the standards existing in the rubber industry. On the basis of a rubber mixture heat-aggressive persistent sealing elements with a hardness of 70±5 Shore A units were made. These sealing elements as part of two sets of packer-anchor equipment were tested for tightness in a casing string simulator. The tests were carried out in an environment of PMS-200 polymethylsiloxane fluid at a temperature of 150 °C, an axial load of 6 tons and a pressure of 70 MPa. It is shown that both sets of packers have passed the tests and meet the requirements. The developed rubber mixture with a hardness of 70±5 Shore A units, containing the process additive СD-12, can be used for the manufacture of sealing elements for packers used in the oil and gas industry.

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Effect of oxidized technical carbon on surface energy of rubber

Voprosy Materialovedeniya ◽

10.22349/1994-6716-2019-98-2-96-101 ◽

2019 ◽

pp. 96-101

Author(s):

M. N. Nagornaya ◽

A. V. Myshlyavtsev ◽

E. A. Strizhak

Keyword(s):

Hydrogen Peroxide ◽

Tensile Strength ◽

Surface Energy ◽

Carbon Black ◽

Butyl Rubber ◽

Active Oxygen ◽

Start Time ◽

Rubber Mixture ◽

Rubber Compounds ◽

Oxidized Carbon

The influence of carbon black N121 and N326, oxidized by active oxygen forms, in comparison with the influence of channel carbon black K 354 on the properties of rubbers based on butyl rubber was investigated. It was revealed that the introduction of oxidized carbon black samples into the composition of rubber compounds allows increasing the start time of rubber mixture scorching from 8.82 to 11.17 minutes, increasing the level of conventional tensile strength from 15, 52 to 16.68 MPa. It has been established that using rubber based on butyl rubber as a filler for carbon black N121 or N326, oxidized with 30% hydrogen peroxide, makes it possible to obtain rubber with a surface energy similar to rubber K 354.

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Effect of hydrosorption polymers on the properties of water-swellable rubber

Butlerov Communications ◽

10.37952/roi-jbc-01/20-64-10-90 ◽

2020 ◽

Vol 64 (10) ◽

pp. 90-93

Author(s):

Konstantin V. Efimov ◽

◽

Evgeny N. Egorov ◽

Nikolay F. Ushmarin ◽

Nikolay I. Koltsov ◽

...

Keyword(s):

Polyvinyl Alcohol ◽

Oil And Gas ◽

Guar Gum ◽

Oil And Gas Industry ◽

Rheological Parameters ◽

Rubber Compound ◽

Rubber Mixture ◽

Gas Industry ◽

The Moment ◽

Sealing Elements

Currently, in the oil and gas industry there is a growing demand for sealing elements capable of limited swelling upon contact with water and sealing the annular space of certain sections of the well. The swelling capacity of the sealing elements is predetermined by a well-chosen combination of polymer base and targeted functional ingredients. At the moment, a big drawback of water-swellable sealing elements is the loss of their sealing ability due to the washing out of hydrosorption additives from the sealing element. In this regard, in this work, the effect of hydrosorption polymers (polyacrylamide, sodium carboxymethylcellulose, polyvinyl alcohol and guar gum) on the properties of water-swellable rubber based on a combination of nitrile-butadiene SKN 1855, acrylate nipol AR22 and chloroprene CR 232 rubbers and epoxy 20 with sulfur curing system. The rubber mixture was prepared by mixing rubbers with ingredients on a laboratory roll LB 320 160/160. The rheological characteristics of the rubber compound were studied on an MDR 3000 Basic rheometer at 150 °C. Standard rubber samples were vulcanized at 150 °C for 30 min in a P-V-100-3RT-2-PCD vulcanization press. The main properties of vulcanizates were determined according to the standards in force in the rubber industry. It is shown that the introduction of polyacrylamide together with sodium carboxymethyl cellulose, polyvinyl alcohol and guar gum into a rubber compound leads to a change in its rheological parameters. Vulcanizates containing a combination of polymers are characterized by lower values of the conventional tensile strength and rebound elasticity, but higher elongation at break and the degree of swelling in distilled and formation water as compared to the vulcanizate of the base version of the rubber mixture.

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