Company News

• 2024-07-23

  Waterproof coating casing pipe

  The use of oil casing pipe in oil wells is very common. Due to the complexity of the stress state in the well under different geological conditions, the oil casing pipe must meet high quality standards in the process of bearing tension, compression, bending and torsion stress. Any damage caused by the casing's own defects may lead to a decrease in oil well production or even the scrapping of the entire oil well. Therefore, it is crucial to understand and select the appropriate waterproof coating for the protection of oil casing pipe.

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• 2024-07-22

  API 5D Drill Pipe

  API 5D is a standard specification commonly used in the oil drilling industry. It covers the manufacturing and design requirements for drill pipes, drill pipe threads, and related components. The following will introduce the API 5D standard step by step from several aspects.

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• 2024-07-22

  Drill collar weight and size standards

  Drill collars are thick, heavy tubular objects used in the drill string just above the drill bit, with the drill pipe connected below. They provide rigidity and weight to the drill bit to help control direction and improve drilling efficiency. Heavier drill chains apply more force to the drill bit to crush the rock and keep the hole vertical. Their weight also increases the tensile strength of the drill pipe to prevent bending. Generally, longer and heavier drill boats are more popular for deeper and more challenging drilling environments. Typical drill collar lengths range from 30 to 90 feet. The length and weight of oil drill collars need to be calculated and selected according to the specific drilling situation. The drill collar is at the bottom of the drill string and is the main component of the lower drilling tool assembly. Its main characteristics are large wall thickness (generally 38~53mm, equivalent to 4~6 times the wall thickness of the drill pipe), large gravity and rigidity.

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• 2024-07-19

  What is Threaded Pup Joints?

  Threaded pup joints are commonly used fittings for industrial pipe connections. Depending on the specific application, threaded pup joints can be divided into single-threaded pup joints and double-threaded pup joints. A single-threaded pup joint has external threads on one end, while a double-threaded pup joint has external threads on both ends. These joints serve the purpose of connecting, extending, and converting in various engineering projects. This article will provide a detailed introduction to the usage methods, standards, manufacturing materials, machining precision, load-bearing capacity, corrosion resistance, service life, threaded connection performance, testing methods, and marking, packaging, transportation, and storage of threaded pup joints.

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• 2024-07-19

  API 5B and API 5CT: Casing and Tubing

  API (American Petroleum Institute) has published a series of standards for the oil and gas industry, including API 5B and API 5CT. These two standards are important standards specifically for casing and tubing, covering the specifications, materials, manufacturing methods, inspection and acceptance requirements of steel pipes. This article will introduce the content, steel grades, application scenarios and related technical details of API 5B and API 5CT in detail.

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• 2024-07-18

  Stainless steel seamless pipe

  Stainless steel seamless pipe is a long steel strip with a hollow cross-section and no seams around it. Stainless steel seamless pipe is a pipe material with high corrosion resistance and high aesthetics, widely used in construction, chemical medicine, petroleum and other fields. Its definition and characteristics are as follows:

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• 2024-07-18

  What are the types of drill collars?

  The drill collar is an important part of the drill string. Its main function is to apply drilling pressure to the drill bit and pump drilling fluid, so that the lower drilling tool assembly has greater rigidity, ensure the stability of the drill bit, and reduce the problem of well deviation. Since the drilling pressure is formed by the weight of the drill string, the compressive stress of the lower part of the drill string is relatively large. Usually, the drilling pressure value is greater than the critical value of the pressure rod stability of the drill string, which will cause the drill string in the lower compressed part to bend under the action of its own weight. During the rotation process, the bent drill string will cause alternating stress, resulting in fatigue damage of the drill string. In order to reduce the degree of fatigue damage and reduce bending stress, drill collars are usually used instead of drill rods in the compressed part of the lower end of the drill string. Drill collars are generally made of thick-walled seamless steel pipes, and the types include cylindrical drill collars, spiral drill collars, non-magnetic drill collars, square drill collars, etc. The following will introduce the characteristics of various types of drill collars and their manufacturing processes in detail.

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• 2024-07-17

  PVC Screen Casing VS Steel Screen Casing

  Steel screen casing, also known as V-type screen casing, is a tubular filter element composed of "V"-shaped or wedge-shaped stainless steel surface wire and support strips welded together. The main materials include corrosion-resistant metal materials such as stainless steel 304/316L, Hastelloy, titanium alloy, super duplex stainless steel, and monel alloy. Steel screen casings are generally composed of casing pipe, high-density punching sleeve, and stainless steel matching ring. They have the characteristics of precisely controllable pores, large flow area, high overall strength and strong anti-deformation ability, excellent corrosion resistance, and high reliability. Its surface is smooth without edges and corners, burrs, and uniform gaps. It is suitable for the original parts of a variety of automatic filters and is widely used in the field of liquid filtration or oil sand control.

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• 2024-07-16

  SCH80 Pup Joints

  Pup joints are a common component in industrial piping systems, mainly categorized into single-threaded pup joints and double-threaded pup joints. As the names imply, single-threaded pup joints have threads on one end, while double-threaded pup joints have threads on both ends. Their simple yet versatile design makes them indispensable in various applications, allowing for easy and efficient pipe connections and extensions.

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• 2024-07-16

  Advantages of OCTG Casing Pipes

  In the exploration of oil and gas, OCTG casing pipes are used to support the well walls of oil and gas wells. They are essential for ensuring the drilling process and the normal operation of the entire well after completion. Thus, the use of OCTG casing pipes is critically important. OCTG (Oil Country Tubular Goods) refers to a series of pipes used in oil and gas drilling and production, including tubing, casing, and drill pipes. API 5CT is a standard set by the American Petroleum Institute (API) to regulate the technical requirements and specifications for casing and tubing used in the oil and gas industry.

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• 2024-07-15

  Hydrostatic Testing of Oil Casing and Tubing

  Oil-specific pipes are primarily used for drilling and transporting oil and gas in wells. During drilling, oil casing plays a crucial role, primarily serving as a wall support in the drilling process to ensure the smooth progression of drilling and the normal operation of the entire well after completion. Oil casing and tubing is the lifeline for maintaining well operation. Given the complex geological conditions and the diverse stress states underground—such as tensile, compressive, bending, and torsional stresses—stringent quality requirements are imposed on the casing itself. If the casing and tubing is damaged for any reason, it can lead to reduced production or even abandonment of the entire well. To ensure the quality and performance of oil casing and tubing , hydrostatic testing becomes an essential inspection method.

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• 2024-07-15

  Drill pipe size and classification

  Drill pipe is a hollow thin-walled steel or aluminum alloy pipe used in drilling equipment. It is hollow so that drilling fluid can be pumped into the hole through the drill bit and returned to the annulus. Drill pipe plays a key role in oil and gas exploration, and its size and specifications have a significant impact on the drilling process. The size of drill pipe includes the outer diameter and the inner diameter, and these dimensions are usually expressed in inches. When choosing the size of drill pipe, factors such as the depth of drilling, geological conditions, and construction environment need to be considered.

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