Company News

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

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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2024-07-12

Small-diameter seamless steel pipe

Small-diameter seamless steel pipe refers to seamless steel pipe with a smaller outer diameter, usually referring to steel pipe with an outer diameter below 89mm and above 4mm. It can be divided into two categories: seamless small-diameter steel pipe and straight-seam small-diameter seamless steel pipe (also called welded small-diameter seamless steel pipe). Small-diameter seamless steel pipe is a round, square, or rectangular steel with a hollow cross-section and no seams around it. Seamless steel pipes are made by perforating steel ingots or solid tubes into rough pipes, and then hot-rolled, cold-rolled, or cold-drawn. Seamless steel pipes have a hollow cross-section and are widely used as pipes for conveying fluids. Compared with solid steel such as round steel, steel pipes are lighter in weight when the bending and torsional strengths are the same. They are an economical cross-section steel and are widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile drive shafts, bicycle frames, and steel scaffolding used in construction.

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2024-07-12

Pup Joint Specifications and Sizes

The oil casing pup joint is a short length of oil casing, which is mainly used to adjust the height and depth of the oil well casing string. It is also widely used to adjust the position of downhole tools. As an important component for connecting and adjusting the length of the oil well casing string, its manufacturing and specifications must comply with the API5CT industry standard. It is made of specific steel, usually special steels such as J55 and N80Q, to ensure its pressure resistance and corrosion resistance in complex oil well environments. The pup joint is mainly used to adjust the height of the full-length oil pipe or casing string. It has the same steel grade and threaded connection type as the oil pipe and casing, but it is shorter in length. This article will introduce its size and specifications.

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2024-07-11

API 5L Steel Pipe Piles

Steel pipe piles are products made of steel pipes, mortises, tenons, etc., usually made of welded steel pipes such as SSAW (spiral submerged arc welded pipe) and ERW (electric resistance welded pipe). These steel pipe piles can be overlapped to form arc or circular structures, and are widely used in water enclosure, sand enclosure and other projects, mainly used in offshore wharf construction. Steel pipe piles have the advantages of simple structure, convenient use, good sealing, high strength and good elasticity. The size of steel pipes is diverse, with an outer diameter of 50-120 cm and a wall thickness of 1-1.8 cm.

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2024-07-11

Casing Pipe: Manufacturing Process

Oil casing pipe is a key oil extraction equipment, mainly used to support the wellbore wall, prevent wellbore collapse and mud loss. The production process of oil casing pipe includes a series of complex steps from steel selection to final product inspection to ensure that the produced casing pipe can play a role in the harsh oilfield environment. This article will introduce the production process of oil casing pipe and its various links in detail.

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2024-07-10

ASTM A178 ERW Steel Pipes

ASTM A178 and ASME SA-178 are standard specifications for electric-resistance-welded (ERW steel pipe) carbon steel and carbon-manganese steel pipes. These pipes are primarily used in high-pressure boilers, boiler flues, superheater flues, and safe ends. ASTM A178 specifies three grades of steel pipes: Grade A (low carbon steel), Grade C (medium carbon steel), and Grade D (carbon-manganese steel). This article will provide a detailed introduction to ASTM A178 ERW steel pipes, covering their specifications, manufacturing process, heat treatment, testing and inspection methods, and specific applications.

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2024-07-10

Seamless Boiler Pipe

Boiler tubes refer to steel products with hollow sections and openings at both ends. They are longer than their circumference. They can be divided into seamless steel pipes and welded steel pipes according to the production method. Seamless boiler tubes are an important type of steel tube used for boilers and pressure vessels. They are widely used in various boiler systems because of their lack of welds, high strength, and resistance to high temperature and high pressure. The manufacturing method of seamless boiler tubes is similar to that of ordinary seamless tubes, but they have stricter requirements in terms of steel selection and production process. The quality of boiler tubes directly affects the safety and efficiency of the boiler system, so strict quality control and testing are required during the manufacturing process.

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2024-07-09

Anti-corrosion Technology of Casing Pipe

In the extraction of oil and natural gas, casing pipes, oil pipes, drill rods, drill collars, and other tubular components are indispensable. The quality of the casing pipes directly impacts the safety and efficiency of the entire drilling operation, making their corrosion prevention crucial. This article will provide a detailed overview of the methods used to prevent corrosion of oilfield casing pipes, with a particular focus on the application of liquid anti-corrosion coatings for the external surfaces.