公开(公告)号：US06474419B2

公开(公告)日：2002-11-05

申请号：US09411774

申请日：1999-10-04

申请人： Gary Maier ,  Marty L. Stromquist ,  Eric Schmelzl

发明人： Gary Maier ,  Marty L. Stromquist ,  Eric Schmelzl

IPC分类号： E21B2306

CPC分类号： E21B23/006 ,  E21B33/1291 ,  E21B33/1294

摘要： A packer with an equalizing valve for automatically equalizing the pressure above and below the packer element. The packer comprises a housing having an equalizing valve disposed therein. A packer element is disposed about the housing for sealingly engaging the wellbore. An equalizing valve is disposed in the housing and seals the housing to prevent flow therethrough when the packer element is actuated to engage the wellbore. The valve is movable in the closed position wherein communication through the housing is prevented to an open position so that the portion of the wellbore above the packer element may be communicated with a portion of the wellbore below the packer element while the element is in the set position so that pressure above and below the element may be equalized. Once the pressure is equalized, the packer can be unset and retrieved from the wellbore.

摘要翻译： 具有均衡阀的封隔器，用于自动均衡封隔器元件上方和下方的压力。 封隔器包括具有设置在其中的均衡阀的壳体。 封隔器元件设置在壳体周围以密封地接合井眼。 平衡阀设置在壳体中并且密封壳体以防止当封隔器元件被致动以接合井筒时流过其中。 阀可在关闭位置移动，其中通过壳体的连通被阻止到打开位置，使得封隔器元件上方的井眼的部分可以与封隔器元件下方的井筒的一部分连通，同时元件在该组件中 使得元件上方和下方的压力可以相等。 一旦压力相等，封隔器可以从井筒中取出并取出。