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NACE MR0175/ISO 15156 とは何ですか?

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NACE MR0175/ISO 15156 is a globally recognized standard that provides guidelines for selecting materials resistant to sulfide stress cracking (SSC) and other forms of hydrogen-induced cracking in environments containing hydrogen sulfide (H₂S). This standard is essential for ensuring the reliability and safety of equipment used in the oil and gas industry, particularly in sour service environments. Critical Aspects of NACE MR0175/ISO 15156 Scope and Purpose: The standard addresses the selection of materials for equipment used in oil and gas production that are exposed to environments containing H₂S, which can cause various forms of cracking. It aims to prevent material failure due to sulfide stress, corrosion, hydrogen-induced cracking, and other related […]

油井完成：石油・ガス井における OCTG の適用と設置手順

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Introduction Oil and gas exploration and production involve complex equipment and processes. Among these, the proper selection and use of tubular goods—drill pipes, drill collars, drill bits, casing, tubing, sucker rods, and line pipes—are crucial for the efficiency and safety of drilling operations. This blog aims to provide a detailed overview of these components, their sizes, and their sequential use in oil and gas wells. 1. Drill Pipe, Drill Collar, and Drill Bit Sizes Drill Pipes are the backbone of the drilling operation, transmitting power from the surface to the drill bit while circulating drilling fluid. Common sizes include: 3 1/2 inches (88.9 mm) 4 inches (101.6 mm) 4 1/2 […]

13Cr 対 スーパー 13Cr: 比較分析

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In the challenging landscape of the oil and gas industry, material selection is pivotal to ensuring the longevity and efficiency of operations. Among the myriad of materials available, 13Cr and Super 13Cr stainless steels stand out for their remarkable properties and suitability in demanding environments. These materials have revolutionized the industry, providing exceptional resistance to corrosion and robust mechanical performance. Let’s delve into the unique attributes and applications of 13Cr and Super 13Cr stainless steels. Understanding 13Cr Stainless Steel 13Cr stainless steel, a martensitic alloy containing approximately 13% chromium, has become a staple in the oil and gas sector. Its composition typically includes small amounts of carbon, manganese, silicon, phosphorus, […]

油井管（OCTG）

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Oil country tubular goods (OCTG) is a family of seamless rolled products consisting of drill pipe, casing, and tubing subjected to loading conditions according to their specific application. (see Figure 1 for a schematic of a deep well): The Drill Pipe is a heavy seamless tube that rotates the drill bit and circulates drilling fluid. Pipe segments 30 ft (9m) long are coupled with tool joints. The drill pipe is simultaneously subjected to high torque by drilling, axial tension by its dead weight, and internal pressure by purging drilling fluid. Additionally, alternating bending loads due to non-vertical or deflected drilling may be superimposed on these basic loading patterns. Casing pipe […]

知っておくべきこと: フランジ面仕上げ

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The ASME B16.5 code requires that the flange face (raised face and flat face) has a specific roughness to ensure that this surface is compatible with the gasket and provides a high-quality seal. A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 micro inches. This allows for various grades of surface finish to be made available by flange manufacturers for the gasket contact surface of metal flanges. Serrated Finish Stock Finish The most widely used of any flange surface finish, because practically, is suitable for all ordinary service conditions. Under compression, the soft face from […]