自锁式深井密闭取心工具的研制与应用.pdf

2012年第41卷
石油矿场机械
第4期第57页
OIL FIELD EQUIPMENT
2012,41(4):5760
技术应用
文章编号:1001-3482(2012)04-0057-04
自锁式深井密闭取心工具的研制与应用
李让,吕跃滨,杨晨涛,彭彬,胡建均
(中原石油勘探局钴井工程技术研究院,河南濮阳457001)
摘要:随着井深的増加,钻井密闭取心的难度也在增加。现有的密閉取心工具存在结构复杂、拆装
困难、易憋压放炮、堵心磨心、密封效果差等问题。通过对工具结构的改进,在下活塞底部增加刮泥
功能,上活塞增加泄压功能,采用耐高温、抗腐蚀的密封件,解决エ具存在的问题。现场应用表明,
该工具结构合理、使用安全可靠,密闭取心成功率、岩心收获率、密闭率大幅度提高,施工质量合格
率达到100%
关键词:深井;密闭取心工具;上活塞;下活塞
中图分类号:TE921.303
文献标识码:A
Development and Application of Self-locking Sealed Coring Tool for Deepwell
LI Rang, IV Yao-bin, YANG Chen-tao, PENG Bin, HU Jian-jun
Drilling Engineering Technology Research Institute, Zhon g yuan Petroleum
E xploration Burea, Puyang 457001, China)
Abstract With the drilling depth increases, the difficulty of drilling coring is also increasing. The
existing coring tools have problem in complex structure, disassembly difficulty, pressure-blasting
blocked core, and poor sealing effect. After development, underpiston added mud shaving func
tion, and resolved depressing accident by sand setting. Upperpiston added decompression func
tion, and avoided coring data incomplete and personnel safety threaten accident by core blasting
using a high temperature, corrosion resistant seals. Tool structure is improved, and resolved com-
lex dismounting, reduced the labor intensity, and saved the operating time. Through application
on well, tool structure is reasonable, application is safe and reliable, sealed coring success rate,
core cropping efficiency, and seal rate is greatly advanced, acceptable quality rate achieved 100%
Key words: deep well; sealed coring tool; upperpiston; underpiston
钻井取心所获取的岩心是认识油气田和地层物分布和油气储量动用情况,水洗水淹程度,残余油的
性参数的重要资料,是油田勘探与开发评价的主要饱和度等]。随着我国石油工业的发展,钻井深度
依据。对于同一口井的某一层位,钻井取心是不在不断増加,深井、硬地层密闭取心技术已成为亟待
可重复的,因此必须取好岩心,提高岩心收获率。在解决的重大问题。由于井段愈深,地层压力就愈
油田开发中后期,通过密闭取心可了解剩余油气的高,要求的钻井液密度也愈大,取心工具的密闭性要
收稿日期:2011-10-27
基金项目:国家高技术研究发展计划(863计划)项目“提高超深井钴井速度及安全钻井技术研究”(2006AA06A1097
作者简介;李让(1961-),男,陕西洛南人,工程师,1982年毕业于长庆石油学校钻井专业,从事钻井工艺技术研究和现场
密闭取心技术服务工作,Email:yangct(a126.com。