System for dislodging and extracting tubing from a wellbore
AssigneeTenax Energy Systems, LLC
InventorKevin Dewayne Jones
Life of this patent
Estimating the term…
Abstract
A system used to dislodge and, if necessary, sever a tubular string that is stuck within a cased wellbore. The system utilizes a jar, a plurality of plugs, and a tubular severance device. Components of the system are carried to their respective desired downhole positions by downward fluid flow within the wellbore. The jar is configured to jar the string in an effort to dislodge the string from its stuck point. The plugs are configured to fill open perforations formed in the casing in order to direct the fluid toward the stuck point and away from the perforations. If the string cannot be freed by the jar, the tubular severance device is deployed within the string above the stuck point. Detonation of the device severs the string above the stuck point.
Claims15
An apparatus, comprising:
- a tubular severing device configured to be installed within a tubular string, the tubular severing device, comprising:
- a first section having a first cavity formed therein;
- a second section joined to the first section, the second section having a second cavity formed therein;
- an explosive charge installed within the first cavity;
- and
- a control system engaging the explosive charge and configured to selectively initiate the explosive charge;
- a sensor, configured to send a signal to the control system;
- wherein the control system initiates the explosive charge in response to the signal;
- and
- wherein the first section is positioned upstream from the second section when the tubular severing device is installed within the tubular string.
An apparatus, comprising:
- a tubular severing device configured to be installed within a tubular string, the tubular severing device, comprising:
- a first section having a first cavity formed therein;
- a second section joined to the first section, the second section having a second cavity formed therein;
- an explosive charge installed within the first cavity;
- and
- a control system engaging the explosive charge and configured to selectively initiate the explosive charge;
- a timer, in communication with the control system;
- wherein the first section is positioned upstream from the second section when the tubular severing device is installed within the tubular string;
- and
- wherein the control system is configured to initiate the explosive charge in response to a signal from the timer.
Dependencies are inferred from the claim text.