Apparatus for injecting a fluid into a geological formation

Abstract

An apparatus to inject a fluid into a geological formation. The apparatus includes a central bore running axially through the apparatus; a normally-closed sleeve valve with a sliding sleeve, the sleeve valve configured to open at a sleeve activation pressure; an upstream packer disposed upstream from the sleeve valve; a downstream packer disposed downstream from the sleeve valve; and a normally-open bottom valve disposed downstream from the downstream packer, the bottom valve configured to block axial fluid flow at a first bore pressure. The upstream packer and the downstream packer are configured to set at a second bore pressure between the first bore pressure and the sleeve activation pressure.

Dependencies are inferred from the claim text.