Buffer Tank

Sanjack has more than 30 year’s experiences and equipped with class I, II & III pressure vessel production certificate. Leading products include tank, tower, furnace and structure parts. The annual production capacity is 10,000 tons.

  • In 1997, Sanjack obtained the Grade 3 installation qualification
  • In 2004, Obtained crane installation and maintenance license
  • In 2005, obtained the B-class pressure pipe component manufacturing license;
  • In 2007, we obtained the D-class pressure vessel design license;
  • In 2008, we obtained the A-class boiler design and manufacturing qualification.
  • In 2012, Sanjack has obtained ASME U&S qualification

Oilfield buffer tanks, also known as surge tanks or storage tanks, play a crucial role in the oil and gas industry. These tanks are used to store and regulate the flow of crude oil, natural gas, and other hydrocarbons during the production process. Buffer tanks are designed to manage fluctuations in production rates, ensure a continuous flow of oil, and prevent any disruption in operations.

1.Importance of Buffer Tanks in Oilfield Operations

Buffer tanks are essential components in the oil and gas industry as they help maintain a steady flow of oil or gas during production. The production rates in oilfields can vary significantly due to factors such as reservoir pressure, well productivity, or the implementation of artificial lift methods. Fluctuations in production rates can alter the flow characteristics, leading to issues such as surges, pressure drops, and instabilities in the pipeline system. Buffer tanks provide a solution by acting as temporary storage facilities, allowing oil or gas to be accumulated or drawn off as per operational requirements. By managing the flow variations, buffer tanks prevent interruptions, optimize production, and minimize potential damages.

2.Construction of Buffer Tanks

Buffer tanks are typically large cylindrical containers made of steel. The tanks are fabricated with high-quality materials and undergo strict quality control measures to ensure durability and safety. The steel construction of buffer tanks offers effective resistance to corrosion, leakage, and extreme weather conditions. These tanks are designed with various components, including inlet and outlet pipes, level indicators, pressure relief valves, and access doors. Depending on the size and capacity, buffer tanks can be mounted on a skid or trailer for easy transportation and installation at different locations in an oilfield.

3.Working Principles of Buffer Tanks

The primary function of buffer tanks is to regulate the flow of oil or gas by allowing the accumulation or withdrawal of hydrocarbons as needed. The tanks are connected to the upstream pipeline system where oil or gas flows and undergoes fluctuations in rates. As the production rate exceeds the downstream demand, the excess fluid is diverted into the buffer tank, which acts as a temporary storage reservoir. Conversely, when the demand exceeds the production rate, the buffer tank supplies additional fluid into the downstream system to maintain a continuous flow. The tank’s capacity ensures that there is enough storage volume to bridge the gap between the production and demand rates while avoiding pressure surges or drops.

4.Types of Buffer Tanks

1). Vertical Buffer Tanks: These tanks have a vertical orientation, with the tank’s length exceeding its diameter. Vertical buffer tanks are suitable for applications with limited land space as they have a smaller footprint. These tanks can be installed individually or in clusters, depending on the required storage capacity.

2). Horizontal Buffer Tanks: Unlike vertical tanks, horizontal buffer tanks have a larger diameter compared to their length. These tanks are typically used when space is not a constraint. Horizontal tanks offer advantages such as easy accessibility for maintenance and inspection, better utilization of surface area, and increased stability due to their low center of gravity.

3). Spherical Buffer Tanks: Spherical buffer tanks feature a unique design with a spherical shape. This design allows for efficient distribution of pressure, minimizing stress concentration points. Spherical tanks have high structural integrity and are commonly used when operating conditions involve high pressures or require large storage capacities.

To ensure the proper functioning and longevity of buffer tanks, regular maintenance is essential. This includes periodic inspections, checking for leaks or corrosion, and cleaning or replacing filters and valves. Maintenance also involves monitoring the tank’s internal and external pressure, temperature, and fluid levels. Additionally, safety measures such as proper grounding, fire protection systems, and emergency shutdown mechanisms should be in place to mitigate any potential risks.

Buffer tanks are critical components in oilfield operations, allowing for the smooth and efficient flow of oil and gas. These tanks offer temporary storage and help regulate production variations, ensuring a continuous supply of hydrocarbons while preventing disruptions or damages. Understanding the construction, working principles, and different types of buffer tanks is vital for oil and gas companies to optimize their operations and maintain safety standards.

Sanjack can customize various buffer tanks according to customer requirements.

  1. Efficient Heat Transfer: Steam heat exchangers provide efficient heat transfer due to the high latent heat of condensation of steam.
  2. Versatility: They can handle a wide range of temperatures and pressures and are compatible with various fluids.
  3. Compact Design: Some types, such as plate heat exchangers, offer compact designs, ideal for situations with limited space.

Model Capacity Compartment Numbers Service Pressure Working Pressure Inlet Gas Outlet Oil Outlet Code
50-1-150 50 bbl 1 Sour service 150 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
50-1-250 50 bbl 1 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
50-2-150 50 bbl 2 Sour service 150 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
50-2-250 50 bbl 2 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
100-1-150 100 bbl 1 Sour service 150 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
100-1-250 100 bbl 1 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
100-2-250 100 bbl 2 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
120-1-150 120 bbl 1 Sour service 150 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
120-1-250 120 bbl 1 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
120-2-150 120 bbl 2 Sour service 150 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)
120-2-250 120 bbl 2 Sour service 250 Gravity 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO 3 inch ANSI 602 WECO ASME, NACE ANSI, DNV (for offshore)

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