Gravel pack crossover tool with single position multi-function capability

摘要: A gravel packing method and apparatus allows setting the packer by dropping a ball to seat that it isolated from effects of formation pressures when trying set packer. This is accomplished isolation pack outlet port locating in position where pressure are irrelevant. Additionally, positioning evacuation ports above seal bore screen extension during circulation or squeeze deposit further putting check valves ports, step after can be without having reposition crossover. The crossover supported movement away back support operates valve allow squeezing closed circulating reversing out open. Thus, facilitates circulation, reverse single position.