I. Corrosion Protection Background for Oil and Gas Facilities

With the development of the economy and the increasing demand for energy, the consumption of oil and gas has been growing. The corrosion protection of oil and gas facilities has also become a top priority. Various seminars on corrosion protection for oil and gas facilities are held every year, as it is closely related to safety and operational reliability.

The primary function of oil and gas transportation pipelines is to transport oil and gas. During transportation, the oil and gas contain hydrogen sulfide, carbon dioxide, water, and other substances. These media have a very serious corrosive effect on the oil and gas pipelines, which significantly affects the safety of transportation. Therefore, corrosion protection measures need to be taken for oil and gas pipelines. However, due to the different characteristics of oil fields, the corrosion environment and substances present can vary, making the corrosion mechanisms and forms more complex. Thus, the selection of corrosion protection measures cannot be generalized and should be based on the specific characteristics of different oil fields. In the transportation process of the pipelines, the common medium is usually a mixed multiphase flow, and large-scale transportation exacerbates the corrosion of the inner wall, making internal corrosion particularly important. To ensure the effective supply and safe transportation of energy, it is necessary to research and scientifically select corrosion protection measures for transportation pipelines. The causes of corrosion in oil and gas facilities mainly include: 1. Electrochemical corrosion, 2. Crevice corrosion, 3. Stress corrosion.

I. Reference Standards

Current national standards, relevant regulations, and mandatory standard provisions;

"Code for Construction and Acceptance of Building Anti-corrosion Engineering" (GB50212-2002)

"Standard for Corrosion and Rust Removal Levels of Steel Surface Before Coating" (GB8923-1988)

"Safety Regulations for Coating Operations and Safety Management Rules" (GB6514-1995)

"Quality Requirements for Anti-corrosion Coatings" (GB6514-1991)

"Safety Regulations for Coating Operations, Paint Process Safety, and Ventilation Purification" (DJ/T6931-1999)

"Code for Construction and Acceptance of Industrial Equipment and Pipeline Anti-corrosion Engineering" (HGJ229-91)

"Safety Regulations for Coating Operations and Safety of Surface Preparation Process" (GB7692-87)

"Noise Limits at Construction Sites" (GB12523-90)

ISO9001 Quality Management System Documents

ISO14001 Environmental Management System Documents

GB/T28001 Occupational Health and Safety Management System Documents

I. Design Basis

Environmental Conditions: The corrosion level of atmospheric environments on steel structures can be determined according to Table 1.

I. Drilling Equipment Corrosion Protection New Construction Plan

The drilling working environment is mostly harsh, subjected to various natural erosions, with corrosion being the most serious. In oil extraction, as crude oil is a mixture with certain corrosiveness, coupled with natural environmental factors, corrosion issues are common during the oil drilling process. This severely affects oil extraction efficiency and leads to a decrease in the operational efficiency of drilling equipment.

Oil-based Coating Corrosion Protection Plan

Water-based Coating Corrosion Protection Plan

1. Drilling Equipment Corrosion Maintenance Plan

Drilling refers to the process of using mechanical equipment or human labor to create holes in the earth's layers from the surface. It generally refers to the engineering of drilling wells for exploration or development of liquid and gaseous minerals such as oil and natural gas, as well as large-diameter water supply wells. Drilling plays a crucial role in national economic development. Oil is the lifeblood of industrial economic development. Oil drilling and extraction require specialized equipment, which is not only expensive but also prone to corrosion due to harsh working environments, often leading to equipment failure.

Oil-Based Coating Corrosion Protection Plan

Water-Based Coating Corrosion Protection Plan

I. New Anti-Corrosion Plan for Marine Oil Platform Equipment

The corrosion in the marine environment is 400-500 times higher than that in desert areas. Salt mist in the marine atmosphere, environmental temperature and humidity, sunlight, seawater temperature and flow rate, dissolved oxygen and salinity in seawater, wave impact, floating objects collision, marine organisms, bacteria in seabed soil, etc., can cause corrosion of steel structures to varying degrees. The marine platform is long exposed to the harsh marine environment mentioned above, and corrosion is a prominent issue.

Oil-Based Coating Anti-Corrosion Plan

Water-Based Coating Anti-Corrosion Plan

I. Marine Oil Platform Equipment Anti-corrosion Maintenance Plan

Most marine oil platforms are constructed using steel. With the development of the marine oil industry, a variety of platforms are used for offshore development, ranging from simple single-column platforms to large platforms weighing tens of thousands of tons. The construction of large platforms is quite complex, with multiple operational functions and high costs. These platforms are generally placed in offshore waters and are mostly fixed installations. Therefore, unlike ships, they cannot be easily repaired, making maintenance quite difficult.

The causes of platform damage are varied, but most of them come from the effects of the marine environment on the platform. These effects can be summarized into forces and corrosion.

Oil-based Coating Anti-corrosion Plan

Water-based Coating Anti-corrosion Plan

I. Anti-corrosion Plan for Oil Extraction Equipment

Currently, some of the oil fields in China have entered the later stages of water injection or polymer injection development. Under the influence of the displacing media, the corrosion of the extraction equipment is becoming increasingly severe. It can be said that corrosion has become one of the key factors affecting the reliability and service life of the mechanical equipment in this system.

Anti-corrosion Plan Using Oil-based Coatings

Anti-corrosion Plan Using Water-based Coatings

I. CORROSION PROTECTION MAINTENANCE PLAN FOR OIL EXTRACTION EQUIPMENT

The working principle of oil extraction equipment is: the power is provided by a power machine, which is converted by a reducer to the low-speed rotation of the oil extraction machine crank, and through the crank-connecting rod-rocking beam mechanism, the rotational movement is transformed into the up-and-down reciprocating motion of the oil extraction machine's "donkey head", which drives the deep-well pump to work through the suspension rope assembly. During the long-term operation of the oil extraction equipment, certain abrasive corrosion will occur, which will affect the normal operation of the equipment. The causes of abrasive corrosion are varied, so corresponding anti-corrosion measures must be selected based on the specific corrosion issues.

Oil-based Coating Protection Plan

Water-based Coating Protection Plan

I. Anti-corrosion Plan for Pigging Equipment

Pigging devices are instruments that use fluid pressure to propel through pipelines for purposes such as cleaning, measuring, detecting, or other functions. The pigging device was originally a leather disc piston that could scrape off wax accumulated on the inner walls of operating pipelines. Without increasing power, it could significantly improve pipeline flow and was also used to remove debris and water from newly constructed pipelines, improving the reliability of pipeline commissioning. As a result, pigging technology and equipment have gained attention from the petrochemical construction and pipeline production departments.

I. Anti-Corrosion Plan for Heating Equipment

A heating furnace is a heating equipment that transfers the heat generated by the combustion of fuel to the heated medium, increasing its temperature. In the oil and gas gathering and transportation system, its role is to heat crude oil, natural gas, and other materials to the required temperature for processing and transportation.

During the refining process of petroleum, heating furnaces encounter corrosive and poor-quality crude oil with high sulfur and acid content, as well as corrosive media generated from the fuel. These oils and corrosive media can cause corrosion to the heating furnace.