CN103266854B - 液动冲旋子母钻头 - Google Patents
液动冲旋子母钻头 Download PDFInfo
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- CN103266854B CN103266854B CN201310176720.9A CN201310176720A CN103266854B CN 103266854 B CN103266854 B CN 103266854B CN 201310176720 A CN201310176720 A CN 201310176720A CN 103266854 B CN103266854 B CN 103266854B
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CN201310176720.9A CN103266854B (zh) | 2013-05-14 | 2013-05-14 | 液动冲旋子母钻头 |
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CN201310176720.9A CN103266854B (zh) | 2013-05-14 | 2013-05-14 | 液动冲旋子母钻头 |
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CN103266854A CN103266854A (zh) | 2013-08-28 |
CN103266854B true CN103266854B (zh) | 2015-01-14 |
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US6799648B2 (en) * | 2002-08-27 | 2004-10-05 | Applied Process, Inc. | Method of producing downhole drill bits with integral carbide studs |
US20100108398A1 (en) * | 2008-11-06 | 2010-05-06 | Dongmin Niu | Percussion Rock Drilling Bit with More Efficient Flushing |
CN202627971U (zh) * | 2012-06-20 | 2012-12-26 | 西南石油大学 | 一种新型排屑结构的空气锤钻头 |
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C06 | Publication | ||
PB01 | Publication | ||
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SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20130828 Assignee: Jiangsu Shuangxin Petroleum Machinery Co., Ltd. Assignor: Changzhou University Contract record no.: 2015320000299 Denomination of invention: Hydraulic drive percussion primary-secondary drilling bit Granted publication date: 20150114 License type: Exclusive License Record date: 20150429 |
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LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
TR01 | Transfer of patent right |
Effective date of registration: 20211222 Address after: Room 407-2-6, building C, Tian'an Digital City, 588 Changwu South Road, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province 213100 Patentee after: CHANGZHOU XIAOGUO INFORMATION SERVICES Co.,Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: CHANGZHOU University |
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TR01 | Transfer of patent right |