Heat sources and alloys for use in down-hole applications
AssigneeBiSN Tec Ltd
InventorPaul Carragher
Life of this patent
Estimating the term…
Abstract
A chemical reaction heat source for use in heaters used in down-hole applications is provided. The heat source has a fuel composition that comprises thermite and a damping agent. The use of the thermite mix enables the heaters of the present invention to generate hotter temperatures down wells. This in turn allows the use of Bismuth/Germanium alloys, which have higher melting points, to enable the production of plugs for the abandonment of deeper wells where subterranean temperatures are higher.
Claims21
1-14. (canceled)
A Bismuth alloy based plug tool, characterized in that the Bismuth alloy comprises Bismuth and Germanium.
-22. (canceled)
A downhole tool comprising:
- (a) a heating element comprising a mixture of:
- (i) a chemical reaction heat source;
- and (ii) a damping agent;
- wherein the mixture defines a ratio of the chemical reaction heat source and the damping agent, wherein the ratio is selected to provide a predetermined temperature upon activation of the heating element;
- and,
- (b) a plug material comprising an alloy, the alloy having a predetermined melting temperature;
- (c) wherein the predetermined temperature is based upon the predetermined melting point, wherein the predetermined melting temperature is based upon the predetermined temperature, or both.
A downhole tool system comprising:
- (a) a heating element comprising a mixture of:
- (i) a chemical reaction heat source;
- and (ii) a damping agent;
- wherein the mixture defines a ratio of the chemical reaction heat source and the damping agent, wherein the ratio is selected to provide a predetermined temperature upon activation of the heating element;
- and,
- (b) a plug material in a well, the plug material comprising an alloy, the alloy having a predetermined melting temperature;
- and,
- (c) wherein the predetermined temperature is based upon the predetermined melting point, wherein the predetermined melting temperature is based upon the predetermined temperature, or both.
The method of using the downhole tool of claim 1 for a downhole application in a well.
The method of claim 41, wherein the downhole application, comprises an application selected from the group consisting of squeezing off, the fitting of annulus packers, the repair of annulus packers, the maintenance of sand filters, and the repair of sand filters.
Dependencies are inferred from the claim text.