| 摘要 |
An apparatus for placing a filter screen and for packing gravel around the filter screen adjacent a well formation. The apparatus includes a body having a packer portion and a valve portion. The body defines a central passageway therethrough. The valve portion includes a valve mandrel with a valve sleeve slidably positioned therein, and transverse openings in the valve sleeve and valve mandrel are aligned to form a transverse passageway therethrough when the valve is in an open position. A stinger is positionable in the body for closing the central passageway and actuating the valve sleeve between the open and closed positions thereof. When in the open position, the transverse openings in the valve mandrel and valve sleeve are aligned with a transverse opening in the stinger such that fluid communication is provided between a well annulus below the packer portion and the tool string above the apparatus. Collet fingers engage the stinger so that when the stinger is moved from the body, the valve is closed. The stinger has seal members thereon, and the stinger may be positioned such that the transverse opening therein is above the packer portion while at least one seal element is still sealingly engaged with the central passageway. In this way, fluid communication is provided between the tool string and a well annulus above the packer. When the stinger is removed from the body, the central passageway is opened for production of fluids therethrough. A method for using the apparatus is also disclosed.
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