发明名称 |
Method of drilling and abrasive jet drilling assembly |
摘要 |
<p>A method of drilling into an object, comprising providing a drill string (1) in a borehole (2) in the object, the drill string comprising an abrasive jet drill head (16) including a jet nozzle (18), and providing a passageway (20) for fluid from the object's surface to the jet nozzle; supplying a fluid mixture comprising magnetic particles via the drill string towards the abrasive jet drill head and blasting from the jet nozzle an abrasive jet (19) into impingement with the object; modulating (14) a jetting concentration of magnetic particles in the abrasive jet; by modulating a magnetic field at a collection surface (114) arranged along a flow path of fluid towards the jet nozzle between a first value of the magnetic field, at which magnetic particles are collected from the fluid mixture at the collection surface, and a second value, at which magnetic particles are released into the fluid mixture from the collection surface.</p> |
申请公布号 |
AU2010334867(B2) |
申请公布日期 |
2015.10.01 |
申请号 |
AU20100334867 |
申请日期 |
2010.12.22 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
BLANGE, JAN-JETTE;VAN NIEUWKOOP, PIETER |
分类号 |
E21B7/04;B24C9/00;E21B7/18;E21B21/00 |
主分类号 |
E21B7/04 |
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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