Optimization of a Perforator Nozzle Based on the Constant Velocity of Jet Core  

作　　者：Aihua Tao Chao Li Zhijun Jie Yong Zhang Xing Chen Weili Liu 

机构地区：[1]Oilfield Technology Branch,China Oilfield Services Limited,Langfang,065201,China [2]School of Mechanical Engineering,Jiangsu University,Zhenjiang,212013,China [3]Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,AB T2N 1N4,Canada

出　　处：《Fluid Dynamics & Materials Processing》2025年第3期645-656,共12页流体力学与材料加工(英文)

基　　金：The authors gratefully acknowledge the financial support by the National Natural Science Foundation of China(No.52405272);the CNOOC’s major project during the 14th Five-Year Plan period“Key Technologies and Equipment for Measurement,Recording,and Testing-Development and Engineering of Integrated Perforation Technology Equipment Based on Reservoir Geology”and the National Science Foundation of Jiangsu Province(No.BK20220533).

摘　　要：Hydraulic sandblasting perforation plays a crucial role in the fracturing and reconstruction of unconventional oil and gas reservoirs.The jet nozzle is an essential part of the hydraulic perforation tool.Insufficient penetration depth,caused by excessive jet distances,presents challenges during the perforation process.To overcome this,an optimization design of the nozzle structure is required to enhance the perforation efficiency.In this paper,a computational fluid-dynamic model for conical-cylindrical nozzles has been elaborated.To further improve the rock-breaking efficiency of the jet nozzle,a fillet design is introduced at the nozzle inlet section.The SST k-ωmodel is employed to account for turbulent flow effects in submerged conditions.The results indicate that the nozzle’s geometric parameters greatly influence the flow characteristics.The orthogonal experimental method is employed to optimize the flow channel structure of the nozzle,taking the length of constant velocity core as the evaluation index.The following optimized geometric parameters for the conical-cylindrical nozzle have been determined accordingly:a cylindrical segment diameter of 3.2 mm,a contraction angle of 12°,a contraction segment length of 8 mm,a cylindrical segment length of 6.4 mm,and a fillet radius of 2 mm.

关 键 词：Perforator nozzle field characteristics orthogonal experiment nozzle parameters jet constant velocity core 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]