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The weldability of J55 oil casing

The oil casing is composed of a collar and pipe body. A single pipe body is connected with the collar thread and transported to the oil field site with end to end connection to facilitate transportation and use after reaching the required length. In order to strengthen the strength and anti-loosening control of the threaded connection, […]

Advantages of U tube heat exchanger

U tube heat exchanger is characterized by its simple structure, good tightness, convenient maintenance and cleaning, low cost, good thermal compensation performance and strong pressure bearing capacity. The U-tube heat exchanger has the largest heat exchange area under the same diameter. The main structure of U-shaped tube heat exchanger includes tube box, cylinder, head, heat exchange tube, […]

How the insolation joints welded?

Insulation joints are mainly used in the sealing protection of oil and gas pipelines and to prevent electrochemical corrosion. They are mainly composed of short joints, steel flanges, fixing rings, seals, insulation plates, insulation sleeves and filling insulation materials. The type of sealing can be the O-ring seal, U-ring seal, and “O + U-shaped” composite seal, […]

What is the material of N80 in N80 oil casing?

N80 petroleum casing and N80 seamless steel pipe are important equipment for oil drilling, whose main equipment also includes drill pipes, core pipes and casing, drill collars and steel pipes for small diameter drilling. N80 petroleum casing and N80 seamless steel pipe have three kinds of lengths specified in the API standard: namely, R-1 for […]

Basic matters of oil casing

Chemical composition(1)According to SY/T6194-96. The same steel grade is used for the casing and its coupling. Sulfur content <0.045% and phosphorus content <0.045%.(2)Take chemical analysis samples according to the provisions of GB/T222-84. Chemical analysis in accordance with the provisions of the relevant part of GB223.(3) American Petroleum Institute API SPEC 5CT 1988 1st edition regulations. […]

The great role of oil casing

In the past, when oil extraction was carried out, simple mechanical tools were used to dig the well, and then oil workers stood on the edge of the well for oil extraction and pipeline transportation, which brought great problems to safety and efficiency. The main aspects of this are: First, the water and soil in […]

The performance of oil casing and its role in oil wells

Oil casing can be divided into different steel grades according to the strength of the steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc.. Well conditions, well depths are different, the steel grade taken is also different. In the corrosive environment also request the casing itself exists corrosion resistance. The actual […]

Classification and use of oil casing

Surface casing1、Used to seal the upper unstable loose, collapse-prone and leaky formations and water layers.2、Installation of wellhead device to control well blowout.3、Support part of the weight of technical casing and oil layer casing. The depth of the surface casing down depends on the specific situation, usually a few dozen meters to a few hundred meters […]

Petroleum casing heat treatment to improve toughness

Petroleum casing emerged not only for oil extraction but also as a pipeline for transporting raw materials. In order to strengthen the quality of petroleum casing, every link in the production process is particularly important, especially the temperature control during the period, which must be mastered in strict accordance with the regulations. Usually, the petroleum […]