发明名称 |
EARTH BORING TOOLS INCLUDING RETRACTABLE PADS, CARTRIDGES INCLUDING RETRACTABLE PADS FOR SUCH TOOLS, AND RELATED METHODS |
摘要 |
An earth-boring tool may comprise at least one cavity formed in a face thereof. At least one retractable pad residing in the at least one cavity may be coupled to a piston located at least partially within the at least one cavity. Additionally, a valve may be positioned within the earth- boring tool and configured to regulate flow of an incompressible fluid in contact with the piston through an opening of a reservoir. A cartridge may comprise a barrel wall defining a first bore, and a piston comprising at least one retractable pad positioned at least partially within the first bore. The barrel wall and the piston may define a first reservoir within the first bore, and a valve may be positioned and configured to regulate flow through an opening to the first reservoir. Related methods and devices are also disclosed. |
申请公布号 |
WO2012174206(A3) |
申请公布日期 |
2013.04.25 |
申请号 |
WO2012US42400 |
申请日期 |
2012.06.14 |
申请人 |
BAKER HUGHES INCORPORATED;OESTERBERG, MARCUS |
发明人 |
OESTERBERG, MARCUS |
分类号 |
E21B10/62;E21B10/32 |
主分类号 |
E21B10/62 |
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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