Release tool for downhole operations
AssigneeGeodynamics, Inc.
InventorsPhil PHELPS, John T. HARDESTY, Dennis E. ROESSLER, Terrell SALTARELLI
Life of this patent
Estimating the term…
Abstract
A downhole tool for connecting and releasing portions of a tool string includes a housing; an electronics assembly; an activation mechanism; a valve assembly and a set of retainer dogs to connect and release a neck of another tool. The downhole tool may also include one or more measurement sensors for measuring a parameter and transferring one or more measured parameter values to the surface of the well.
Claims20
An apparatus for connecting and releasing a downhole tool located within a wellbore comprising:
- a housing having an axial bore;
- an electronics assembly configured to communicate with the surface of the wellbore;
- an activation mechanism configured to receive an electrical current from the electronics assembly;
- a valve assembly in operative communication with the activation mechanism and having a first piston configured to open a port in the housing to wellbore fluid;
- a second piston slidably engaged with the housing and held in an initial downward state by a spring;
- plural retainer dogs each having an engagement recess disposed on an inner radial surface thereon configured for clamping a neck of a tool;
- and
- wherein said second piston further comprises a cavity configured to retain said plural retainer dogs in a clamped state until said second piston is acted upon by the wellbore fluid.
An apparatus for connecting and releasing a downhole tool located within a wellbore comprising:
- a housing having an axial bore;
- a burst disk located within the housing and configured to open a passageway to wellbore fluid upon breakage at a predetermined pressure;
- a piston located within the housing and held in an initial downward state by a spring;
- plural retainer dogs having an engagement recess disposed on an inner radial surface thereon configured for clamping a neck of a tool;
- and
- wherein said piston further comprises a cavity configured to retain said plural retainer dogs in a clamped state until said piston is acted upon by wellbore fluid.
A wireline release tool and measurement system, the system comprising:
- a wireline for lowering a tool string into a wellbore;
- a housing attached to the wireline and having an axial bore;
- an electronics assembly configured to communicate with the surface of the wellbore via the wireline;
- a release assembly comprising plural retainer dogs each having an engagement recess disposed on an inner radial surface thereon configured for clamping and releasing a neck of a tool;
- and
- a measurement sensor disposed within the main sub and configured to measure a parameter and communicate a measured value to the electronics assembly.
Dependencies are inferred from the claim text.