公开(公告)号：US09976360B2

公开(公告)日：2018-05-22

申请号：US13228376

申请日：2011-09-08

申请人： Mark Ellsworth Wassell ,  Daniel E. Burgess ,  Jason R. Barbely ,  Fred Lamar Thompson

发明人： Mark Ellsworth Wassell ,  Daniel E. Burgess ,  Jason R. Barbely ,  Fred Lamar Thompson

IPC分类号： E21B7/00 ,  E21B17/07 ,  E21B44/00

CPC分类号： E21B17/07 ,  E21B17/073 ,  E21B44/005

摘要： A system for damping vibration in a drill string can include a magnetorheological fluid valve assembly having a supply of a magnetorheological fluid. A remanent magnetic field is induced in the valve during operation that can be used to provide the magnetic field for operating the valve so as to eliminate the need to energize the coils except temporarily when changing the amount of damping required. The current to be supplied to the coil for inducing a desired magnetic field in the valve is determined based on the limiting hysteresis curve of the valve and the history of the magnetization of the value using a binary search methodology. The history of the magnetization of the valve is expressed as a series of sets of current and it resulting magnetization at which the current experienced a reversal compared to prior values of the current.

公开(公告)号：US20120085581A1

公开(公告)日：2012-04-12

申请号：US13228376

申请日：2011-09-08

申请人： Mark Ellsworth Wassell ,  Daniel E. Burgess ,  Jason R. Barbely ,  Fred Lamar Thompson

发明人： Mark Ellsworth Wassell ,  Daniel E. Burgess ,  Jason R. Barbely ,  Fred Lamar Thompson

IPC分类号： E21B7/00 ,  E21B41/00

CPC分类号： E21B17/07 ,  E21B17/073 ,  E21B44/005

摘要： A system for damping vibration in a drill string can include a magnetorheological fluid valve assembly having a supply of a magnetorheological fluid. A remanent magnetic field is induced in the valve during operation that can be used to provide the magnetic field for operating the valve so as to eliminate the need to energize the coils except temporarily when changing the amount of damping required The current to be supplied to the coil for inducing a desired magnetic field in the valve is determined based on the limiting hysteresis curve of the valve and the history of the magnetization of the value using a binary search methodology. The history of the magnetization of the valve is expressed as a series of sets of current and it resulting magnetization at which the current experienced a reversal compared to prior values of the current.

摘要翻译： 一种用于阻尼钻柱中的振动的系统可以包括具有磁流变流体供应的磁流变流体阀组件。 在操作期间在阀中感应到残留的磁场，其可以用于提供用于操作阀的磁场，以便在改变所需阻尼量的量时不需要临时地激励线圈。要供应到的电流 基于阀的极限滞后曲线和使用二元搜索方法的值的磁化历史来确定用于在阀中引起期望磁场的线圈。 阀的磁化历史表示为一系列电流，并且与电流的先前值相比，电流经历了反转的磁化。