CN204326972U - 套管防碰钻头 - Google Patents

套管防碰钻头 Download PDF

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Publication number
CN204326972U
CN204326972U CN201420700777.4U CN201420700777U CN204326972U CN 204326972 U CN204326972 U CN 204326972U CN 201420700777 U CN201420700777 U CN 201420700777U CN 204326972 U CN204326972 U CN 204326972U
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China
Prior art keywords
drill bit
tooth
sleeve pipe
footpath
footpath tooth
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Expired - Fee Related
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CN201420700777.4U
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English (en)
Inventor
于建宾
关舒伟
王福修
倪华峰
徐玉超
刘丽杰
彭烨
田京燕
汪为涛
陈曦
王明瑞
张坤
张栋
孙骏
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Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Priority to CN201420700777.4U priority Critical patent/CN204326972U/zh
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Abstract

本实用新型涉及石油和地质钻头,具体是套管防碰钻头。套管防碰钻头主要由钻头体、喷嘴、刀翼和切削齿组成的PDC钻头基础上,在刀翼外侧面上增设到径齿和保径齿,其中到径齿和到径齿托组合搭配,到径齿设置较大的后倾角。在使用PDC钻头钻塞时由于到径齿设置较大的后倾角或采用金刚石孕镶块等降低了其侧向切削能力,到径齿托限制了到径齿的侧向吃入深度保护切削齿的同时可以更有效防止PDC钻头碰伤套管,避免套管损伤同时节约一趟起下钻时间缩短钻井周期。可以有效防止PDC钻头碰伤套管。

Description

套管防碰钻头
技术领域
本实用新型涉及石油和地质钻头,具体是套管防碰钻头。
背景技术
目前在石油和地质钻井过程中,钻塞主要以牙轮钻头为主。但有时为了提速需要,避免牙轮钻头钻塞后起钻换PDC钻头增加一趟钻的时间,延长钻井周期。现场经常使用PDC钻头钻塞后继续钻进。现有的PDC钻头主要由钻头体、喷嘴、刀翼和切削齿组成,钻塞时会造成PDC钻头外侧部的切削齿的损坏,更重要的是PDC的切削齿会切削到套管造成套管损坏,为后续的施工埋下隐患。
实用新型内容
本实用新型的目的正是为了为解决使用PDC钻头钻塞时发生的PDC钻头到径齿的损坏,更重要的是PDC的到径齿会切削到套管造成套管损坏的问题,提供一种在使用PDC钻头钻塞时可以有效保护切削齿并且不会损伤套管的套管防碰钻头。
本实用新型的套管防碰钻头主要由钻头体、喷嘴、刀翼和切削齿组成的PDC钻头基础上,在刀翼外侧面上增设到径齿和保径齿,其中到径齿和到径齿托组合搭配。
上述方案进一步包括:
到径齿和到径齿托出露高度相同。到径齿可以是聚晶金刚石复合片或金刚石孕镶块等。
到径齿和保径齿设置较大的后倾角,后倾角角度在20-70度之间。
到径齿托包括球形齿、椭圆形齿或平齿的一种或几种组合,平齿的横截面为多边形、圆形或不规则形。
本实用新型的有益效果是:在使用PDC钻头钻塞时由于到径齿设置较大的后倾角或采用金刚石孕镶块等降低了其侧向切削能力,到径齿托限制了到径齿的侧向吃入深度保护切削齿的同时可以更有效防止PDC钻头碰伤套管,避免套管损伤同时节约一趟起下钻时间缩短钻井周期。
附图说明
图1为本实用新型一种实施例的局部结构示意图。
图中:钻头体1、喷嘴2、刀翼3、切削齿4、到径齿5、到径齿托6和保径齿7。
具体实施方式
下面结合附图对本实用新型做进一步说明。
如图1所示,本实用新型主要由钻头体1、喷嘴2、刀翼3、切削齿4、到径齿5、到径齿托6和保径齿7组成。切削齿4镶装在刀翼3上。到径齿5可以是聚晶金刚石复合片或金刚石孕镶块等,其形状可以为球形齿或楔形齿。到径齿托6布置在到径齿5后侧,与到径齿5等高。到径齿托6可以为球形齿椭圆形齿或平齿,平齿的横截面可以为多边形或圆形或不规则形。
到径齿5和保径齿7均设置较大的后倾角,后倾角角度在20-70度之间。到径齿托6与到径齿5出露高度相等。
工作原理:
在使用本实用新型钻塞时由于到径齿5设置较大的后倾角降低了其侧向切削能力,到径齿托6限制到径齿5的侧向吃入深度可以有效防止PDC钻头碰伤套管。

Claims (4)

1.套管防碰钻头,包括钻头体(1)、喷嘴(2)、刀翼(3)和切削齿(4),其特征在于:在刀翼(3)外侧面上还设置有到径齿(5)、到径齿托(6)和保径齿(7)。
2.如权利要求1所述的套管防碰钻头,其特征在于:到径齿(5)和到径齿托(6)出露高度相同。
3.如权利要求1或2所述的套管防碰钻头,其特征在于:到径齿(5)和保径齿(7)设置后倾角,后倾角角度在20-70度之间。
4.如权利要求3所述的套管防碰钻头,其特征在于:齿托(6)包括球形齿、椭圆形齿或平齿的一种或几种组合,平齿的横截面为多边形或圆形。
CN201420700777.4U 2014-11-21 2014-11-21 套管防碰钻头 Expired - Fee Related CN204326972U (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105672889A (zh) * 2014-11-21 2016-06-15 中石化胜利石油工程有限公司钻井工艺研究院 套管防碰钻头

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105672889A (zh) * 2014-11-21 2016-06-15 中石化胜利石油工程有限公司钻井工艺研究院 套管防碰钻头

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Granted publication date: 20150513

Termination date: 20201121