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公开(公告)号：US20150014061A1
公开(公告)日：2015-01-15
申请号：US14497455
申请日：2014-09-26
发明人： Jian Wu , Jianbing Hu , Dwayne P. Terracina , Tommy G. Ray
CPC分类号： E21B34/06 , E21B7/28 , E21B10/32 , E21B23/006
摘要： A downhole tool assembly is configured for repeated and selective hydraulic actuation and deactuation. A piston assembly is configured to reciprocate axially in a downhole tool body. The piston assembly reciprocates between a first axial position and second and third axial positions that axially oppose the first position. The downhole tool is actuated when the piston assembly is in the third axial position and deactuated when the piston assembly is in either of the first or second axial positions. A spring member biases the piston assembly towards the first axial position while drilling fluid pressure in the tool body urges the piston assembly towards the second and third axial positions. Downhole tool actuation and deactuation may be controlled from the surface, for example, via cycling the drilling fluid flow rate.
摘要翻译： 井下工具组件被配置为用于重复和选择性的液压致动和停用。 活塞组件构造成在井下工具体中轴向往复运动。 活塞组件在轴向相对于第一位置的第一轴向位置和第二和第三轴向位置之间往复运动。 当活塞组件处于第三轴向位置时，井下工具被致动，并且当活塞组件处于第一或第二轴向位置时，井下工具被致动。 弹簧构件朝向第一轴向位置偏压活塞组件，同时在工具体内钻出流体压力，迫使活塞组件朝向第二和第三轴向位置。 例如，可以通过循环钻井液的流速从表面控制井下工具致动和停用。
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公开(公告)号：US20160348440A1
公开(公告)日：2016-12-01
申请号：US14722193
申请日：2015-05-27
发明人： Xiaoge Gan , Jiaqing Yu , Yuelin Shen , Youhe Zhang , Yong Zhou , Jian Wu
摘要： A drill bit includes a bit body having a longitudinal bit axis extending there through, a plurality of journals extending from the bit body, each journal having a journal axis extending from a base of the journal through the length of the journal, a roller cone rotatably mounted to each of the journals, and at least one blade protruding from the bit body center and extending radially outward to less than an outer diameter of the drill bit.
摘要翻译： 钻头包括具有从其延伸的纵向钻头轴线的钻头体，从钻头体延伸的多个轴颈，每个轴颈具有从轴颈的基部延伸穿过轴颈的长度的轴颈轴线， 安装到每个轴颈上，以及至少一个刀片从钻头体中心突出并且径向向外延伸到小于钻头的外径。
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