The utility model discloses a hydraulic technology in the field of downhole drilling tool in multi nozzle jet radial drilling device, aiming to solve the existing technology in front of jet nozzle traction caused the level of short length, radial drilling hole diameter smaller problems. It includes casing, casing is provided with a steering gear, steering by the upper end of the cross-over joint is connected with a first pipe, a first oil pipe is also arranged in the coiled tubing; steering gear is arranged in the guide channel, the guide channel is internally provided with a high-pressure connected steering gear top and side walls of the spray hose, high pressure spray hose end and the lower end of the continuous the tubing is connected at the end of the hose is connected with a high pressure jet front jet nozzle, high pressure spray hose is provided with at least two intermediate nozzle, nozzle intermediate circumferential distributed prior to the nozzle, to spray holes and radial holes. The utility model has the advantages of large traction force, long horizontal drilling length, larger drilling hole diameter and faster drilling speed, and is suitable for the underground mining fields of petroleum, natural gas and the like.
【技术实现步骤摘要】
本技术涉及一种钻井井下工具,特别涉及一种水力喷射多喷嘴径向钻孔装置,适用于石油、天然气等井下开采领域。
技术介绍
现有技术中有一种水力喷射径向钻孔装置,包括套管,套管内设有转向器,转向器的上端通过变扣接头连接有第一油管,第一油管内还设有连续油管;转向器内还设有导向通道,导向通道内设有连通转向器顶部和侧壁的高压喷射软管,高压喷射软管的始端与连续油管的下端相连接,高压喷射软管的末端连接有前端射流喷嘴。该装置是利用高压水射流的水力破岩作用的原理进行工作的,首先,利用第一油管将转向器送入套管内并下放至预测钻位置,锚定转向器;然后,将外径小于第一油管内径的连续油管放入第一油管内,利用与连续油管相连接的磨铣钻头穿过转向器的导向通道,对套管侧壁磨铣形成开窗;最后,将磨铣钻头更换为前端射流喷嘴,使前端射流喷嘴穿过开窗,利用高压水喷射岩石实现破岩钻进,形成径向分支井眼,同时推进喷嘴向前钻进。其不足之处在于,由于使用高压喷射软管作喷管且钻进距离较长,前端射流喷嘴往往不能通过后续推力送进而必须依靠前端喷嘴的牵引拖动,而单个喷嘴的牵引力是有限,使得钻孔装置的水平钻进长度受到限制;且随着 ...
【技术保护点】
水力喷射多喷嘴径向钻孔装置,包括套管,套管内设有转向器,所述转向器的上端通过变扣接头连接有第一油管,第一油管内还设有连续油管;所述转向器内还设有导向通道,导向通道内设有连通转向器顶部和侧壁的高压喷射软管,高压喷射软管的始端与所述连续油管的下端相连接,高压喷射软管的末端连接有前端射流喷嘴,其特征在于,所述高压喷射软管上还设有至少两个中间喷嘴,所述中间喷嘴周向分布有若干前向喷孔、后向喷孔和径向喷孔。
【技术特征摘要】
1.水力喷射多喷嘴径向钻孔装置,包括套管,套管内设有转向器,所述转向器的上端通过变扣接头连接有第一油管,第一油管内还设有连续油管;所述转向器内还设有导向通道,导向通道内设有连通转向器顶部和侧壁的高压喷射软管,高压喷射软管的始端与所述连续油管的下端相连接,高压喷射软管的末端连接有前端射流喷嘴,其特征在于,所...
【专利技术属性】
技术研发人员:储明来,彭中,钱国全,刘子龙,陈广超,时维才,
申请(专利权)人:中国石油化工股份有限公司,中国石油化工股份有限公司江苏油田分公司,
类型:实用新型
国别省市:
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