Running and setting tool for well packers

Claim 1

A running and setting tool for a well packer, said packer having a tubular mandrel, upper and lower slip assemblies encircling the mandrel, a seal assembly located between the slip assemblies, and means on the mandrel including a setting sleeve for setting the slip assemblies, said tool comprising: a tubular setting tool mandrel having a first end portion arranged for connection to a string of pipe for lowering the setting tool and packer into a well bore and having a second end portion; releasable means on said setting tool mandrel releaseably connecting said setting tool mandrel to the packer mandrel, said releasable means includes a collet located on said setting tool mandrel, said collect having a plurality of collet portions arranged to engage the packer mandrel; a tubular setting member encircling said setting tool mandrel in telescoping relationship, said tubular setting member having a first end releasably connected to the first end of said setting tool mandrel and having a second end arranged for engagement with the setting sleeve of the packer; a variable volume chamber located between said setting tool mandrel and setting member; a port in said setting tool mandrel connecting the interior of the setting tool mandrel with said chamber; valve means in the second end portion of said setting tool mandrel for selectively preventing flow through the interior of said setting tool mandrel and causing flow into said chamber to move said setting member downwardly relative to said setting tool mandrel to set the slip assemblies; and, means on the second end portion of said setting tool mandrel for retaining said releasably means connected to the packet mandrel and for permitting said releasable means to disconnect from the packer mandrel upon upward movement of said setting tool mandrel upon upward movement of said setting tool mandrel relative to the packer whereby said running and setting tool can be withdrawn from the packer.