DL—1型堵漏实验装置的研制设计

ＤＬ－１型堵漏实验装置用对岩芯施加围压、驱压和回压来模拟井壁所受到的挤压和静压差作用，用平板缝隙流动模拟井眼环空的流动状态，使钻井液对岩芯端面和对井壁的剪切应力相同，从而使实验条件与井下环境极其相似。文中阐述了该装置的设计思路、设计要求和方案，介绍了主要结构设计。该装置应用于长庆油田堵漏项目的研究中取得了较好的实验研究效果。

Design of DL-1 Device for Lost Circulation Control,

The DL-1 device for lost circulation control simulates the extrusion and static pressure difference of the wellface by applying confined pressure, driving pressure and back pressure to the core, and simulates the state of the drilling fluid flowing in downhole annular space by using the model of parallel plate pore flow, which makes the shear stress of the drilling fluid to the core end plane the same as that to wellface, thus makes test conditions highly similar to downhole environment. This paper explains the thought, requirement and plan of the design of the device, and presents the main structural design. Test of the device conducted in Changqing oilfield for lost circulation control was successful.