Downhole drive force generating tool

Patent metadata

Field	Value
Publication number	US-9453381-B2
Application number	US-201313874111-A
Country	US
Kind code	B2
Filing date	Apr 30, 2013
Priority date	May 10, 2005
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

An apparatus and method for generating a drive force in a downhole environment includes chambers of a reactant and a catalyst, respectively, that are maintained separate until selectively exposed to one another. Once exposed, the reactant and catalyst produce expanding fluid pressure and sometimes heat. The products of the reaction are directed to a drive member to carry out a desired operation in the downhole environment.

First claim

The invention claimed is:

1. A downhole drive force generating tool, comprising:
a chamber receptive of a volume of H 2 O 2 ; and
an activator selectively exposable to the H 2 O 2 by selectively moving the activator from outside the chamber past a seal to inside the chamber, the activator capable of causing a chemical reaction including an expansion of fluid when exposed to the volume of H 2 O 2 .

2. A downhole drive force generating tool as claimed in claim 1 wherein the activator is a volume of a catalyst.

3. A downhole drive force generating tool as claimed in claim 2 wherein the catalyst is metal based.

4. A downhole drive force generating tool as claimed in claim 3 wherein the catalyst is copper or iron based.

5. A downhole drive force generating tool as claimed in claim 4 wherein the catalyst is copper sulfate or iron sulfate.

6. A method for doing work in a downhole environment comprising:
locating a tool having a chamber receptive of a volume of H 2 O 2 in the downhole environment;
moving an activator from outside the chamber past a seal to inside the reactive chamber;
chemically reacting the H 2 O 2 ; and
directing reactant products to a drive member.

7. A method for doing work in a downhole environment as claimed in claim 6 wherein the moving is linear.

8. A method for doing work in a downhole environment as claimed in claim 6 wherein the method further includes linearly moving the drive member.

9. A method for doing work in a downhole environment as claimed in claim 6 wherein the chemically reacting includes decomposing the reactant in the reactant chamber.

10. A method for doing work in a downhole environment as claimed in claim 6 wherein the chemically reacting includes forming fluid pressure.

11. A method for doing work in a downhole environment comprising:
locating a tool having a chamber receptive of a volume H 2 O 2 in the downhole environment;
moving an activator from outside the chamber to inside the reactive chamber;
chemically reacting the H 2 O 2 ; and
directing reactant products to a drive member,
wherein the method further includes rotating the drive member.

12. A method for doing work in a downhole environment comprising:
locating a tool having a chamber receptive of a volume H 2 O 2 in the downhole environment;
moving an activator from outside the chamber to inside the reactive chamber;
chemically reacting the H 2 O 2 ; and
directing reactant products to a drive member,
wherein the method further includes applying an external force to the tool to cause the moving to occur.

13. A method for doing work in a downhole environment as claimed in claim 12 wherein the external force is stabbing into another downhole member.

Assignees

• Moyes Peter Barnes
• Baker Hughes Inc

Inventors

• Moyes Peter Barnes

Classifications

• E21B23/065 Primary

  setting tool actuated by explosion or gas generating means · CPC title

• E21B23/06

  for setting packers · CPC title

• E21B7/007

  Drilling by use of explosives (underwater drilling using explosives E21B7/1245) · CPC title

• E21B4/02 Primary

  Fluid rotary type drives · CPC title

• E21B23/04

  operated by fluid means, e.g. actuated by explosion (E21B23/08 takes precedence) · CPC title