[1]肖志永. 开式抽汲排液中P-T封隔器失封原因分析[J].油气井测试,2021,30(05):18-22.[doi:10.19680/j.cnki.1004-4388.2021.05.003]
　XIAO Zhiyong. Analysis of failure causes of PT packer in open swabbing and drainage[J].Well Testing,2021,30(05):18-22.[doi:10.19680/j.cnki.1004-4388.2021.05.003]
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 开式抽汲排液中P-T封隔器失封原因分析()
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《油气井测试》[ISSN:1006-6977/CN:61-1281/TN]

卷:
30卷
期数:
2021年05期
页码:
18-22
栏目:
出版日期:
2021-10-25

文章信息/Info

Title:
 Analysis of failure causes of PT packer in open swabbing and drainage
文章编号:
1004-4388(2021)05-0018-05
作者:
肖志永
 中国石油大庆油田有限责任公司试油试采分公司 黑龙江大庆 163412
Author(s):
 XIAO Zhiyong
 

Oil Testing and Production Test Branch, PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163412,

China

关键词:
试油;  开式抽汲;  排液;  P-T封隔器;  失封原因;  压力监测;  活塞效应;  产量
分类号:
TE353
DOI:
10.19680/j.cnki.1004-4388.2021.05.003
文献标志码:
B
摘要:
 

当开式抽汲管柱上顶力不足时，会因活塞效应增加密封端面脱离密封唇的几率而导致PT封隔器失封。在杏XX井开式抽汲过程中，P-T

封隔器失封，压力监测曲线表现出压力突降至某一数值后不再降低。经分析认为，封隔器上部液体被抽空情况下，抽汲动作所产生的活塞效应是引起失封的直接原因。通过增

加机械锁紧装置、增加管柱配重、预留合理方余及监测产量变化等改进措施，下封隔器压力监测显示，P-T封隔器密封良好，作业成功。该分析结果可为开式抽汲排液提供一

定的技术借鉴。

Abstract:
 

When the upward force of the open swabbing pipe string is insufficient, the piston effect

will increase the risk of the sealing face detaching from the sealing lip, which will lead to the failure of the PT packer. During the open swabbing

process of Well Xing X-X, the P-T packer failed. At the meantime, the pressure monitoring curve showed that the pressure suddenly dropped to a

certain value and did not continue to decrease. After analysis, it is believed that the piston effect produced by the swabbing action is the direct

cause of the packer′s failure when the liquid above the packer is evacuated. After applying improvement measures such as adding mechanical locking

devices, increasing pipe string counterweights, reserving reasonable surplus and monitoring production changes, the pressure monitoring results showed

that the P-T packer has achieved a good sealing effect and the operation was successful. The analysis results can provide technical reference for

open swabbing and drainage.

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备注/Memo

备注/Memo:
 2020-12-02收稿，2021-07-29修回,2021-08-10接受,2021-10-20网络版发表
中国石油集团（股份）公司科研项目“大庆油田致密油层压裂技术攻关及现场试验”（110014318）

肖志永，男，1984年12月出生，工程师，2008年毕业于西南石油大学石油工程专业，现主要从事

油气测试技术等工作。电话：0459-5691644，13766784402；Email：xiaozhiyong@petrochina.com.cn 。通信地址：黑龙江省大庆市让胡路区乘南十八街试油试采分公司，邮政编码：163412。

更新日期/Last Update: 2021-11-25