可控式水力振荡器结构设计与性能参数研究

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中图分类号：TE927文献标识码：ADOI：10.12473/CPM.202406080

He Xin，Liu Gonghui，Chen Tian，etal. Structural designand performance parametersof controllable hydraulicoscillator[J].China PetroleumMachinery，2025，53（7）：83-88.

Structural Designand Performance Parametersof Controllable Hydraulic Oscillator

He XinLiu Gonghui 1，2 Chen Tian1 Li Jun1，Wang Wei² （1.CollgeofPetroleumEnginering，China UniversityofPetroleumBeijing）；2.ScholofMechanicalandEnergyEnneing Beijing UniversityofTechnology;3.CollgeofPetroleum，China UniversityofPetroleum（Beijing）atKaramay）

Abstract：Hydraulic oscillators are widely used in drilling of horizontal welsand extended-reach wels，to effectively solve the problem of backing pressure of pipe strings and improve drillng effciency.Aconventional hydraulicoscilator starts towork immediately afterit isrun in hole for circulation，with uncontrollale working stateand low effectiveservice life.To addressthis issue，acontrollable hydraulicoscillator is designed.This tool has two working states：vibrational，and dormant，which are switched bycontroling the rotation of the disc valve， and can meet the drilling needs under different conditions.The force during the movement of the disc valve was analyzed，and the disc valve movement mathematical model was built.Based on the analysisof the structure and working principle ofthetool，togetherwith the principleoffluid mechanics，theoutput performance of the tool was analyzed through examples，and a number of hydraulic structure parameters that have obvious effects on the oscillation frequencyand pressure drop of the tool were examined.The results show that the oscilation frequencyof the turbine-drivenhydraulicoscillatorisonlyrelated tothedisplacementofdrillingfluid，thatis，theoscillationfrequency increases with the increase of driling fluid displacement.The pressure dropof the tool increases with the increaseofdrillingfluiddisplacementanddensity，anddecreaseswith the increaseof the areaofthethrottleorifice on the mandrel sidewall.Theresearch findings are referentialfor the design and application of controllble hydraulic oscillators.

Keywords： hydraulic oscillator;backing pressure effect； structural design;disc valve;oscilation frequency

0 引言

随着油气资源勘探开发的重点不断向非常规资源转移，开发难度日趋增大，水平井和大位移井的应用场景越来越多[1-3]。（剩余8342字）