公开(公告)号：US06301959B1

公开(公告)日：2001-10-16

申请号：US09236993

申请日：1999-01-26

申请人： Andrew A. Hrametz ,  Clarence C. Gardner ,  Margaret C. Waid ,  Mark A. Proett

发明人： Andrew A. Hrametz ,  Clarence C. Gardner ,  Margaret C. Waid ,  Mark A. Proett

IPC分类号： E21B4710

CPC分类号： E21B49/10 ,  E21B33/1243

摘要： A formation fluid sampling probe uses two hydraulic lines to recover formation fluids from two zones in a borehole. One of the zones is a guard zone and the other is a probe zone. The guard zone and the probe zone are isolated from each other by mechanical means, with the guard zone surrounding the probe zone and shielding it from the direct access to the borehole fluids. Operation of the tool involves withdrawal of fluid from both zones. Borehole fluids are preferentially drawn into the guard zone so that the probe zone recovers the formation fluid substantially free of borehole fluids. Separation of the guard zone from the probe zone may be accomplished by means of an elastomeric guard ring, by inflatable packers or by tubing. The device can be adapted for use either on a wireline or in an early evaluation system on a drillstring.

摘要翻译： 地层流体采样探头使用两条液压管路从钻孔中的两个区域回收地层流体。 其中一个区域是保护区域，另一个区域是探测区域。 防护区域和探测区域通过机械手段相互隔离，防护区围绕探头区域，并使其不受直接进入井眼液体的作用。 该工具的操作涉及从两个区域中取出流体。 井眼流体优选地被吸入防护区域，使得探针区域回收基本上没有钻孔流体的地层流体。 保护区域与探头区域的分离可以通过弹性防护环，充气封隔器或管道来实现。 该装置可以适用于在线缆上或在钻柱上的早期评估系统中使用。