油井专用K55石油套管 我们不一样

??在石油裂化管标准中，布氏硬度用途最广，往往以压痕直径来表示该材料的硬度，既直观，又方便。但是对于较硬的或较薄的钢材的石油裂化管不适用。???【2】洛氏硬度?

[1] oil cracking tube Brinell hardness [1]??
Among the standards for petroleum cracking pipes, Brinell hardness is the most widely used. It is not only intuitive but also convenient to express the hardness of the material by indentation diameter. However, it is not suitable for oil cracking pipes with harder or thinner steel. ? [2] Rockwell hardness?

石油裂化管洛氏硬度试验同布氏硬度试验一样，都是压痕试验方法。不同的是，它是测量压痕的深度。洛氏硬度试验是当前应用很广的方法，其中HRC在钢管标准中使用仅次于布氏硬度HB。洛氏硬度可适用于测定由极软到极硬的石油裂化管材料，它弥补了布氏法的不是，较布氏法简便，可直接从硬度机的表盘读出硬度值。但是，由于其压痕小，故硬度值不如布氏法准确。???【3】?维氏硬度?

、The Rockwell hardness test of petroleum cracking pipe is the same as Brinell hardness test. The difference is that it measures the depth of indentation. Rockwell hardness test is a widely used b at present. HRC is used in steel pipe standard second only to Brinell hardness HB. Rockwell hardness can be applied to the determination of petroleum cracking pipe materials from very soft to very hard. It makes up for the fact that the Brinell b is not. It is simpler than the Brinell b and can be read directly from the dial of the hardness machine. However, because of its small indentation, the hardness value is not as accurate as that of Brinell b. ? [3]? Vivtorinox hardness?

执行标准：GB9948-2006

Vickers hardness test of petroleum cracking pipe is also an indentation test b, which can be used to determine the hardness of very thin petroleum cracking pipe material and surface layer. It has the main advantages of Brinell b and Rockwell b, and overcomes their basic shortcomings. But it is not as simple as Rockwell b, which is seldom used in petroleum cracking pipe standard. Material: 20G?
Implementation criteria: GB9948-2006

增长需求的疲软将将导致运力的过剩，这将成为困扰航运业复苏前景关键因素，运费增长进一步承压。我国钢材出口持续下降，这主要是由于从5月份开始国内钢材价格显著上涨，使得价格差距不断缩小，出口竞争优势不断被削弱，企业出口积极性明显减弱，从而导致钢材出口显著下滑。

石油专用管主要用于油、气井的钻探及油、气的输送。它包括石油钻管、石油套管、抽油管。石油钻管主要用于连接钻铤和钻头并传递钻井动力。石油套管主要用于钻井过程中和完井后对井壁的支撑，以保证钻井过程的进行和完井后整个油井的正常运行。抽油管主要将油井底部的油、气输送到地面。Weak demand growth will lead to excess capacity, which will be a key factor in the recovery prospects of the shipping industry, and further pressure on freight growth. China's steel exports continued to decline, mainly due to the sharp rise in domestic steel prices since May, resulting in a narrowing price gap, weakening export competitiveness, enterprises'export enthusiasm significantly weakened, resulting in a significant decline in steel exports.
The oil special pipe is mainly used for drilling oil and gas well and transporting oil and gas. It includes oil drill pipe, oil casing and oil suction pipe. The oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power. Oil casing is mainly used to support the wellbore during drilling and after completion to ensure the normal operation of the whole oil well. The tubing mainly transfers the oil and gas at the bottom of the oil well to the ground.

 石油套管是一种大口径管材，起到固定石油和天然气油井壁或井孔的作用。套管是插入井孔里，用水泥固定，以防止井眼隔开岩层和井眼坍塌、并保证钻探泥浆循环流动，以便于钻探开采。在石油开采过程中使用的不同类型的套管：表层石油套管 - 保护钻井，使其避免受浅水层及浅气层污染， - 支撑井口设备并保持套管的其他层重量。技术石油套管 - 分隔不同层面的压力，以便钻液额度正常流通并保护生产套管。

石油套管是维持油井运行的生命线。由于地质条件不同，井下受力状态复杂，拉、压、弯、扭应力综合作用作用于管体，这对套管本身的质量提出了较高的要求。一旦套管本身由于某种原因而损坏，可能导致整口井的减产，甚至报废。按钢材本身的强度套管可分为不同钢级，即J55、K55、N80、L80、C90、T95、P110、Q125、V150等。井况、井深不同，采用的钢级也不同。在腐蚀环境下还要求套管本身具有抗腐蚀性能。在地质条件复杂的地方还要求套管具有抗挤毁性能。
The oil casing is a large diameter pipe, which acts as a fixed oil or gas well wall or well bore. Casing is inserted into the borehole and fixed with cement to prevent the borehole from separating the rock bation and wellbore collapse, and to ensure the circulation of drilling mud flow, so as to facilitate drilling and production. Different types of casing used in oil production: surface casing - Protective drilling to avoid contamination by shallow water and shallow gas layers, supporting wellhead equipment and maintaining the weight of other layers of casing. Technical Oil Casing - Separates pressure at different layers so that drilling fluid flow normally and protects production casing.