Gravel pack crossover tool with check valve in the evacuation port
AssigneeBaker Hughes Incorporated
InventorThomas G. Corbett
Life of this patent
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Abstract
A gravel packing method and apparatus are described where to set the packer, a ball is dropped to a seat that it isolated from the effects of formation pressures when trying to set the packer. This is accomplished by isolation of the gravel pack outlet port when setting the packer and locating the ball seat in a position where the effects of formation pressure are irrelevant. Additionally, by positioning the evacuation ports above a seal bore in the screen extension during circulation to deposit gravel and further putting check valves in the evacuation ports, the evacuation step after circulation can be accomplished without having to reposition the crossover.
Claims20
A gravel packing method, comprising:
- running in a packer and a screen assembly supported by said packer;
- inserting an assembly of a crossover that supports a wash pipe at least in part into said packer;
- flowing gravel through the packer and the crossover and through an annular space between the screen assembly and the wash pipe to an annular region outside the screen assembly;
- removing excess gravel in said annular space without moving the crossover and the wash pipe.
Dependencies are inferred from the claim text.