发明名称 |
DRILLING ASSEMBLY WITH SLIME BACK FLUSH |
摘要 |
FIELD: oil-and-gas production. ^ SUBSTANCE: drilling assembly comprises casing with downhole packer, hammer, drilling bit with central slime intake channel and outer grooves to make exhaust channels with aforesaid casing and downhole packer. Said exhaust channels are communicated with well bottom via inclined blowoff holes directed from periphery to drilling bit center. Downhole packer bottom is furnished with annular chamber communicated with well bottom via inclined blowoff holes. ^ EFFECT: higher efficiency of well cleanout. ^ 2 dwg |
申请公布号 |
RU2463432(C1) |
申请公布日期 |
2012.10.10 |
申请号 |
RU20110115739 |
申请日期 |
2011.04.20 |
申请人 |
UCHREZHDENIE ROSSIJSKOJ AKADEMII NAUK INSTITUT GORNOGO DELA SIBIRSKOGO OTDELENIJA RAN |
发明人 |
LIPIN ANATOLIJ ALEKSEEVICH;ZABOLOTSKAJA NADEZHDA NAZIMOVNA;KHARLAMOV JURIJ PAVLOVICH |
分类号 |
E21B4/14;E21B10/38 |
主分类号 |
E21B4/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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