公开(公告)号：US20150191979A1

公开(公告)日：2015-07-09

申请号：US14516340

申请日：2014-10-16

申请人： Jayesh R. Jain ,  Benjamin Baxter ,  Chaitanya Vempati ,  Steven Radford ,  Gregory L. Ricks ,  Miguel Bilen ,  Holger Stibbe ,  Volker Peters

发明人： Jayesh R. Jain ,  Benjamin Baxter ,  Chaitanya Vempati ,  Steven Radford ,  Gregory L. Ricks ,  Miguel Bilen ,  Holger Stibbe ,  Volker Peters

IPC分类号： E21B10/62 ,  E21B10/42 ,  E21B3/00

CPC分类号： E21B10/62 ,  E21B3/00 ,  E21B10/42 ,  E21B10/54 ,  E21B2010/622

摘要： In one aspect, a drill bit is disclosed, including: a bit body; a pad associated with the bit body; a rate control device coupled to the pad that extends from a bit surface at a first rate and retracts from an extended position to a retracted position at a second rate in response to external force applied onto the pad, the rate control device including: a piston for applying a force on the pad; a biasing member that applies a force on the piston to extend the pad at the first rate; a fluid chamber associated with the piston; and a pressure management device for controlling a fluid pressure within the fluid chamber.

摘要翻译： 一方面，公开了一种钻头，包括：钻头体; 与钻头体相关联的垫; 耦合到所述焊盘的速率控制装置，所述速率控制装置响应于施加到所述焊盘上的外力而以第一速率从钻头表面延伸并且以延伸位置以缩回位置以第二速率缩回，所述速率控制装置包括：活塞 用于在衬垫上施加力; 偏压构件，其在所述活塞上施加力以以所述第一速率延伸所述垫; 与活塞相关联的流体室; 以及用于控制流体室内的流体压力的压力管理装置。

公开(公告)号：US09708859B2

公开(公告)日：2017-07-18

申请号：US14516340

申请日：2014-10-16

申请人： Jayesh R. Jain ,  Benjamin Baxter ,  Chaitanya Vempati ,  Steven Radford ,  Gregory L. Ricks ,  Miguel Bilen ,  Holger Stibbe ,  Volker Peters

发明人： Jayesh R. Jain ,  Benjamin Baxter ,  Chaitanya Vempati ,  Steven Radford ,  Gregory L. Ricks ,  Miguel Bilen ,  Holger Stibbe ,  Volker Peters

IPC分类号： E21B10/62 ,  E21B10/54 ,  E21B10/42 ,  E21B3/00

CPC分类号： E21B10/62 ,  E21B3/00 ,  E21B10/42 ,  E21B10/54 ,  E21B2010/622

摘要： A drill bit includes a bit body; a pad associated with the bit body; a rate control device coupled to the pad that extends from a bit surface at a first rate and retracts from an extended position to a retracted position at a second rate in response to external force applied onto the pad. The rate control device includes a piston for applying a force on the pad; a biasing member that applies a force on the piston to extend the pad at the first rate; a fluid chamber associated with the piston; and a pressure management device for controlling a fluid pressure within the fluid chamber.