选择性重复压裂工具关键技术

秦金立

doi:10.11911/syztjs.2018120

选择性重复压裂工具关键技术

秦金立

中国石化石油工程技术研究院, 北京 100101

基金项目:

中国石化科技攻关项目"水力射孔及喷砂联作重复压裂工具的研制"（编号：P15005）资助。

详细信息

作者简介:
秦金立(1979-),女,天津人,2003年毕业于江汉石油学院机械设计制造及其自动化专业,高级工程师,主要从事井下工具的设计与研发工作。

中图分类号: TE934⁺.2
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出版历程
- 收稿日期: 2018-03-31
- 刊出日期: 1899-12-31

Key Techniques of Selective Refracturing Tools

QIN Jinli

Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China

摘要

摘要: 为了在重复压裂过程中用水力喷射射孔替代火工品射孔，并延长水力喷射工具单趟管柱的使用寿命，同时解决常规扩张封隔器胀封承压后残余变形大、易卡管柱等问题，研制了选择性重复压裂工具。该工具的射孔通道和压裂通道分开设计，通过联作芯轴实现两个通道的转换；根据通道转换特性和施工工艺特征，设计了适时坐封跨接组合式封隔器；为提高承压能力、减小变形，跨接式封隔器胶筒两端均采用了嵌套弹簧式结构。通过室内测试和现场试验验证了选段性重复压裂工具封隔器的封隔性能和通道转换能力。研究结果表明，选择性重复压裂工具可以实现射孔、压裂自由转换、自由选择，减小单段喷嘴的过砂量，延长单趟管柱的使用寿命；封隔器可实现适时坐封解封，胶筒残余变形小且可靠，更易于封隔器的解封及管柱的起出。
- 重复压裂 /
- 封隔器 /
- 水力喷射 /
- 喷嘴 /
- 双封单卡
Abstract: This paper presents the key techniques of selective refracturing tools used in avoiding initiating explosive devices in refracturing,and in prolonging the service life of hydraulic injection tools in single-run string.It also addressed solving the problems of large residual deformation of conventional expansion packer under pressure as well as stuck pipe,etc.The perforation channel and the fracturing channel of the refracturing tools were designed respectively,and channel conversion was realized through the joint mandrel of perforation and fracturing.According to the characteristics of channel conversion and operation,an integrated packer was designed,which could duly set and bridge over.In order to improve the bearing capacity and reduce deformation,an inserted spring structure was adopted in the design of the two ends of the element of the straddle packer.Indoor experiments and fields tests were carried out to verify the sealing performance and channel conversion capability of the packer of the selective refracturing tools.The results showed that the perforation and fracturing of the selective refracturing tools could be freely converted and selected.As a result,the new approach could reduce the volume of sand flowing through the single nozzle and extend the service life of the single-run string.In addition,the packer could duly set and unset.The residual deformation of the element is small and the element is reliable,which further facilitates the unsetting of the packer and the pulling out of the string.
- refracturing /
- packer /
- hydraulic jetting /
- nozzle /
- double-sealing and single-stick

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参考文献(20)

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文章访问数: 3771
HTML全文浏览量: 62
PDF下载量: 5753
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选择性重复压裂工具关键技术

作者简介: 秦金立(1979-),女,天津人,2003年毕业于江汉石油学院机械设计制造及其自动化专业,高级工程师,主要从事井下工具的设计与研发工作。

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Key Techniques of Selective Refracturing Tools

期刊类型引用(2)

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目录

作者简介:
秦金立(1979-),女,天津人,2003年毕业于江汉石油学院机械设计制造及其自动化专业,高级工程师,主要从事井下工具的设计与研发工作。