CN206439022U - 一种多活塞可反洗式封隔器 - Google Patents
一种多活塞可反洗式封隔器 Download PDFInfo
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- CN206439022U CN206439022U CN201720023962.8U CN201720023962U CN206439022U CN 206439022 U CN206439022 U CN 206439022U CN 201720023962 U CN201720023962 U CN 201720023962U CN 206439022 U CN206439022 U CN 206439022U
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CN201720023962.8U CN206439022U (zh) | 2017-01-10 | 2017-01-10 | 一种多活塞可反洗式封隔器 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110566144A (zh) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | 防漏失冲砂方法及冲砂管柱 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110566144A (zh) * | 2019-09-27 | 2019-12-13 | 中石化石油工程技术服务有限公司 | 防漏失冲砂方法及冲砂管柱 |
CN110566144B (zh) * | 2019-09-27 | 2021-08-17 | 中石化石油工程技术服务有限公司 | 防漏失冲砂方法及冲砂管柱 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A multi piston washable packer Effective date of registration: 20201028 Granted publication date: 20170825 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI DINGHE YUANRUI ENVIRONMENTAL ENGINEERING Co.,Ltd. Registration number: Y2020990001259 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20211112 Granted publication date: 20170825 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: SHAANXI DINGHE YUANRUI ENVIRONMENTAL ENGINEERING CO.,LTD. Registration number: Y2020990001259 |
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PC01 | Cancellation of the registration of the contract for pledge of patent right |