| 摘要 |
<p>A gravel packing system in which the gravel screen (SCR) and attached (PKR) are anchorable in a well bore. A cross-over tool (XOV) has an indicator device which cooperates with the gravel screen to provide surface indications of the downhole tool positions and the operation of a gravel valve (GRV). A setting tool (SET) can be used with the cross-over tool (XOV) to set the packer (PKR) and is releasable by hydraulic pressure. The setting tool and packer are releasably and co-rotatively coupled permitting right hand rotation while going in the well bore. The cross-over tool has a float valve (500) which permits reverse circulation in low pressure wells. The packer has a release system for permitting retrieval of the packer.</p> |
