CN204827239U - 牙轮钻头压力平衡及储油补偿系统 - Google Patents
牙轮钻头压力平衡及储油补偿系统 Download PDFInfo
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CN110185035A (zh) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | 一种适用于硬质地层的mjs工法的成桩方法 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110185035A (zh) * | 2019-05-31 | 2019-08-30 | 武汉江钻恒立工程钻具股份有限公司 | 一种适用于硬质地层的mjs工法的成桩方法 |
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Address after: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: Jianghan Petroleum Drilling Bit Co., Ltd. |
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TR01 | Transfer of patent right |
Effective date of registration: 20180321 Address after: 430223, No. 5, Chinese workers' garden, Temple Hill community, East Lake New Technology Development Zone, Wuhan, Hubei Co-patentee after: SINOPEC OILFIELD EQUIPMENT CORPORATION Patentee after: Kingdream Sinopec Petroleum Machinery Co. Ltd. Address before: 430223 Hubei city of Wuhan province science and Technology Park East Lake New Technology Development Zone, Road No. five Patentee before: SINOPEC OILFIELD EQUIPMENT CORPORATION |
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TR01 | Transfer of patent right |