RU2740241C1 - Method of repair and sealing of equipment and pipelines filled with oil or oil products - Google Patents

Abstract

FIELD: oil, gas and coke-chemical industries.SUBSTANCE: method of repair and sealing of equipment and pipelines filled with oil or oil products, consisting in that point of leakage or sweating on pipeline or equipment is cleaned with rag, then surface around place of repair of repaired section, with margin of at least 30 mm in each side, further is cleaned by coarse abrasive tool to impart roughness, then directly on cleaned repaired section, if necessary, by current crude oil or by oil product, first polymer material is applied, first polymer repair material applied on repaired section is left, for 2–7 minutes, until leakage or sweating and solidification of the first polymer repair material is stopped, then the surface around the repair point and the outer surface of the hardened first polymer repair material, with minimum of 50 mm in each side, is cleaned with a rough abrasive tool for roughing, hardened first polymer repair material and repair place around it, with minimum of 50 mm in each side, degreased with a cleaner based on industrial alcohols and applied on outer surface of hardened first polymer repair material, with margin in range of 25–50 mm in each side, second polymer repair material and left, for 30–70 minutes, for polymerisation and solidification of second polymer material.EFFECT: disclosed is a method of repairing and sealing equipment and pipelines filled with oil or oil products.1 cl, 8 dwg

Description

Description of the invention.

1. The invention relates to the field of repair of pipelines and equipment, and in particular to a method of repair and sealing, to eliminate leaks and sweating of equipment and pipelines filled with oil or oil products, using polymer repair materials.

2. State of the art.

a. The invention relates to the field of maintenance and repair of equipment designed for storage, transportation and operation of crude oil and various petroleum products, including transformer oil. This technique includes tanks (vertical and horizontal), transformers, oil tanks, tanks, pipelines. The invention is used to seal the above technique in the elimination of fogging and leaks (leaks).

b. Fields of application of the invention according to the International Patent Classification (IPC):

i. Energy, namely the generation, transmission and distribution of electricity. The invention is used for the repair of transformers, oil tanks, insulators and cooling systems for oil-filled equipment;

ii. Oil and gas industry, namely transportation and storage of petroleum products. The invention is used for the repair of tanks, cisterns, shut-off valves, low and medium pressure pipelines, product pipelines;

iii. Railway transport, namely, when transmitting electricity in contact networks. The invention is used for the repair of transformers, oil tanks, insulators and cooling systems for oil-filled equipment.

c. A known method of repairing metal pipelines (options) (RU 2155905, F16L 55/17 (2000.01), F16L 57/00 (2000.01), 1999). According to this method, composite couplings are used to eliminate the leak in the pipeline.

d. The closest analogue of the claimed invention can be recognized as a method for repairing a pipe section, a method for repairing a pipe, a method for repairing an object, a system for repairing a pipe and a repaired pipe (versions) (RU 2380606, F16L 55/175 (2006.01), 2005). According to this method, in order to eliminate the leak in the pipeline, a structure of polymer material and fibers, for example, carbon fibers, is applied. Prior to the introduction of the polymer material, outer sheath components such as a sleeve, a casing are installed around the fiber structure.

e. The disadvantages of a close analogue, as well as similar methods, should be recognized:

i. impossibility or their high cost of application in case of sealing (elimination of fogging or leaks) on large containers and products, for example, tanks, cisterns, transformers.

ii. another disadvantage of a close analogue, as well as similar methods, is the fact that glass or carbon fiber materials (tapes, couplings, fabrics) cannot be used on complex geometric surfaces of products, assemblies and parts, for example, in pump housings, auto or railway tanks , in the radiators of cooling systems, in the inputs of oil-filled equipment, in the control gear.

3. Disclosure of the invention:

a. The essence of the invention. The technical problem solved by the proposed invention consists in eliminating leaks and sweating of oil or oil products by sequentially applying directly to the places of leakage, two polymeric repair materials with different polymerization times and different strength characteristics. Sealing occurs without the use of glass or carbon fiber, without couplings, outer shells, etc.

b. The purpose of the invention is to create a technically effective and cost-effective technology for repairing tanks, transformers, tanks, pipelines, pumps, electrical switches and other similar equipment filled with oil or oil products, including transformer oil, from fogging and leaks;

c. The technical results obtained during the implementation of the present invention are:

i. Restoration of tightness in the shortest possible time, due to repairs without taking the equipment out of operation, without draining oil products from the equipment;

ii. Reducing or eliminating equipment downtime;

iii. In reducing the cost of repairing a unit of surface area, due to the use of cheaper materials and the possibility of carrying out repairs without draining oil products from equipment and pipelines;

iv. In a significant reduction or elimination of the release of oil products into the environment;

v. In the possibility of using on complex geometric surfaces of products, assemblies and parts, which is absent in a close analogue, as well as in similar methods;

d. Basic terms used when disclosing a new invention:

i. Polymeric repair material is a two-component material based on modified resins (epoxy, polyurethane, polyester, acrylic, etc.), with various fillers (phenol formaldehyde or metal powders, fiber fillers, or vacuum microspheres, nanoparticles), due to which the polymer the material acquires unique technical characteristics. For example, high chemical resistance or high temperature resistance;

ii. The invention uses the FIRST polymer repair material, which consists of the following chemical components, the proportion of components in the composition,%:

Resin Bisphenol A 10-20 Bisphenol F Resin 5-10 Polymercaptan hardener 10-50 Polymerization accelerator 3-10 Fiber filler 5-45 Metallic filler 7-30 Marshal 0.1-5 Nanoparticles 0.005-0.05

iii. The invention uses a SECOND polymer repair material, which consists of the following chemical components, the proportion of components in the composition,%:

Resin Bisphenol A 10-20 Bisphenol F Resin 0.1-6 Amine hardener 0.4-5 Polymerization retarder 1-17 Agidol 0.05-4 Titanium dioxide 0.05-3 Fiber filler 5-50 Metallic filler 10-60 Nanoparticles 0.005-0.05

e. Distinctive features of the claimed invention are:

i. Lack of fabric materials during repair work;

ii. Absence of metal equipment (couplings, shells, mandrels) during repair work;

iii. Using only polymer repair materials;

iv. The practical service life of the equipment repaired using this technology is over 5 years.

v. In general terms, the claimed invention is a method of repairing and sealing equipment and pipelines filled with oil or oil products, which consists in cleaning the place of leakage or sweating on the pipeline or equipment with a cloth, then the surface around the place of repair of the repaired area, with a margin of at least 30 mm in each side, additionally cleaned with a coarse abrasive tool to roughen, then directly on the cleaned repair area, if necessary, along the flowing crude oil or oil product, apply the first polymer material, leave the first polymer repair material applied to the repair area for 2 -7 minutes, until the leakage or sweating and hardening of the first polymer repair material stops, then the surface around the repair site and the outer surface of the hardened first polymer repair material, with a margin of at least 50 mm in each direction, are cleaned with a coarse abrasive tool roughening pipe, with a margin of at least 50 mm in each direction, degrease with a cleaner based on technical alcohols, and apply over the outer surface of the hardened first polymer repair material, with a margin in the range of 25-50 mm in each direction, the second polymer repair material is left within 30-70 minutes, for polymerization and hardening of the second polymeric material.

vi. A distinctive feature of the FIRST polymer repair material is its following features:

1. Adhesion to metal surface in conditions of flowing out of crude oil or petroleum products;

2. Short, 2-7 minutes, time of polymerization and hardening;

3. Mixing ratio - 1 part Base (Base): 1 part Activator

vii. The FIRST polymer repair material, after mixing its components, is applied directly to the place of the leak, directly by sweating or by flowing crude oil or oil product, or by transformer oil;

viii. Within 2-7 minutes, the leak / sweating stops after the FIRST polymer repair material has hardened;

ix. The components of the SECOND polymeric repair material are mixed. A distinctive feature of this polymer is its high strength characteristics:

1. Compressive strength - about 1400 kg / cm ² ;

2. adhesion to a clean metal surface - about 220 kg / cm ² ;

3. Temperature resistance from -50 ° С to + 200 ° С;

4. Resistant to ultraviolet radiation

5. Mixing ratio - 2 parts of Base (Base): 1 part of Activator

x. The surface around the repair site, with a margin of at least 50 mm on each side, is cleaned with a coarse abrasive tool to roughen.

xi. The previously hardened FIRST polymeric repair material and the place of repair around it, with a margin of at least 50 mm in each direction, is degreased with a cleaner based on technical alcohols;

xii. The SECOND polymer repair material is applied to the sealed leak / sweat spot and around it, with a margin of 25-50 mm in each direction, including on the previously applied and hardened FIRST polymer repair material.

xiii. Polymerization within 30-70 minutes.

xiv. Renovation completed.

4. Brief description of graphic materials (drawings).

The figures below show the patentable invention by the example of sealing the cover and the case of the transformer in case of fogging / leakage of transformer oil.

Figure 1 pos. 1 illustrates the place of leakage / fogging, using the example of transformer oil (crude oil or oil products), which is cleaned of dust and dirt with a cloth.

Figure 2 illustrates the surface around the repair site, which with a margin of at least 30 mm on each side, and at the place of leakage / sweating is cleaned with a coarse abrasive tool to roughen. The bolt securing the transformer housing cover (2) to the transformer housing (pos. 4) is removed (unscrewed. Pos. 3 shows a rubber gasket.

Figure 3 illustrates the location of the first polymer repair material (item 5), which, after mixing its components, is applied directly to the place of the leak, directly through the flowing transformer oil. Within 2-7 minutes, the leakage / sweating stops after the polymer repair material hardens.

Figure 4 illustrates the location of the second polymeric repair material. Polymerization of the components of the second polymer repair material (pos. 6) is carried out within 30-70 minutes.

Figures 5-8 show various examples of sealing pipes and equipment.

Claims (4)

A method for repairing and sealing equipment and pipelines filled with oil or oil products, which consists in cleaning the place of leakage or sweating on the pipeline or equipment with a rag, then the surface around the repair site of the repaired area, with a margin of at least 30 mm in each direction, is additionally cleaned with a coarse abrasive a tool for roughing, then directly on the cleaned repair area, if necessary, along the flowing crude oil or oil product, apply the first polymer material, leave the first polymer repair material applied to the repair area for 2-7 minutes, until the leak stops or sweating and hardening of the first polymer repair material, after which the surface around the repair site and the outer surface of the hardened first polymer repair material, with a margin of at least 50 mm in each direction, are cleaned with a coarse abrasive tool to roughen the hardened first The first polymeric repair material and the repair site around it, with a margin of at least 50 mm in each direction, are degreased with a cleaner based on technical alcohols, and applied over the outer surface of the hardened first polymeric repair material, with a margin in the range of 25-50 mm in each direction, the second polymer repair material and leave, for 30-70 minutes, for polymerization and hardening of the second polymer material, and the first polymer material is obtained by mixing the following components, with the proportion of components in the composition,%: Resin Bisphenol A 10-20 Bisphenol F Resin 5-10 Polymercaptan hardener 10-50 Polymerization accelerator 3-10 Fiber filler 5-45 Metallic filler 7-30 Marshal 0.1-5 Nanoparticles 0.005-0.05, and the second polymer material is obtained by mixing the following components, with the proportion of components in the composition,%: Resin Bisphenol A 10-20 Bisphenol F Resin 0.1-6 Amine hardener 0.4-5 Polymerization retarder 1-17 Agidol 0.05-4 Titanium dioxide 0.05-3 Fiber filler 5-50 Metallic filler 10-60 Nanoparticles 0.005-0.05

Images