| 摘要 |
A packer tool for use in a wellbore having a bottomhole pressure p, the tool comprising: a mandrel assembly; a stabilizer on the mandrel assembly, for releasably engaging the wellbore; a packing element in an annular recess having a floor and two facing walls, the annular recess being transversely compressible into a compressed position and disposed about the mandrel assembly; and a piston assembly for driving compression of the packing element annular recess, the piston assembly having a plurality of pistons connected to act in tandem, the pistons having a total piston face surface area a such that an application of pressure of p' to the piston assembly generates a force f greater than p. |
