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1、石油機械2015年第43卷第1期CHINAPETROLEUMMACHINERY．．鉆井技術(shù)與裝備脈沖式井下增壓鉆井裝置增壓特性研究付加勝李根生牛繼磊。史懷忠田守增(1．中國石油集團鉆井工程技術(shù)研究院2．中國石油大學(北京)油氣資源與探測國家重點實驗室3．中國石油大學(華東)石油工程學院)摘要：基于脈沖式井下增壓鉆井裝置的結(jié)構(gòu)和工作原理，建立了其活塞增壓模型，進而對其增壓特性進行數(shù)值模擬研究。研究結(jié)果表明，流體增壓是活塞運動和高壓噴嘴節(jié)流共同作用的結(jié)果。當其他條件相同時，高壓噴嘴出口流速隨轉(zhuǎn)速、活塞行程的增大而增大，并且增大幅度較高
2、，增壓壓力受這3個因素的影響規(guī)律相似；高壓噴嘴出口流速和增壓壓力都隨高壓噴嘴直徑的增大而明顯降低；隨著鉆井液密度增大，高壓噴嘴出口流速和增壓壓力稍微增大。高壓脈沖射流的脈沖頻率只與轉(zhuǎn)速有關(guān)，且隨轉(zhuǎn)速增大而增大，其他因素對其沒有影響。該研究結(jié)果為后續(xù)的樣機設(shè)計和現(xiàn)場試驗參數(shù)的確定提供了依據(jù)。關(guān)鍵詞：井下增壓鉆井裝置；脈沖式；增壓特性；影響因素中圖分類號：TE921文獻標識碼：Adoi：10．3969／j．issn．1001—4578．2015．01．002StudyonSuperchargingCharacteristicofDow
3、nholePulsedPressureIntensifiedDrillingDeviceFuJiasheng·LiGenshengNiuJileiShiHuaizhongTianShouceng(1．CNPCDrillingResearchInstitute；2．StateKeyLaboratoryofPetroleumResourceandProspection，ChinaUniversityofPetrole—um(Beijing)；3．SchoolofPetroleumEngineering，ChinaUniversityo
4、fPetroleum(Huadong))Abstract：Onthebasisofthestructureandworkingprincipleofthedownholepulsedpressurizeintensifieddrillingdevice，thepistonsuperchargingmodelisestablished，basedonwhichthepistonsuperchargingcharacter．isticissimulated．Theresultsshowthatpressurizedfluidisthe
5、resultofpistonmovementandthehigh—pressurenoz—zlechoke．Giventhesameconditions，thehigh．pressurenozzleexitvelocityincreasessignificantlywiththeincre—mentofrevolvingspeedandthepistonstroke．Thehigh—pressurenozzleexitvelocity，revolvespeedandthepistonstrokehavesimilareffects
6、onthesuperchargingpressure．Thehigh-pressurenozzleexitvelocityandthesuperchar。gingpressurereducesignificantlywiththeincrementofthehigh-pressurenozzlediameter．Theincreaseofthefluiddensitywouldresultinslightlyincreasedhigh-pressurenozzleexitvelocityandsuperchargingpressu
7、re．Thepulsefrequencyofthehigh．pressurepulsejetisonlyinfluencedbytherevolvingspeed，andthepulsefrequencywouldincreasewiththeincrementoftherevolvingspeed．Otherfactorshavenoeffectonthepulsefrequency．Thestudyre-suitscouldprovidereferencesforthefollow-upprototypedesignandfi
8、eldtestparametersdetermination．Keywords：downholepressureintensifieddrillingdevice；pulse—type；superchargingcharacteristic；inf
