Multi-phasic explosive fracturing system

Patent metadata

Field	Value
Publication number	US-10480301-B2
Application number	US-201515316616-A
Country	US
Kind code	B2
Filing date	Jun 25, 2015
Priority date	Jun 25, 2014
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Disclosed herein are embodiments of precursor components (or compositions thereof) that can be combined with one or more additional components (or compositions thereof) to form an explosive composition. The disclosed precursor components (or compositions thereof) can be handled and transported safely to a particular location where they can be mixed with liquid fuel to form an explosive composition. In particular disclosed embodiments, the precursor components (or compositions thereof) can comprise, consist essentially of, or consist of an oxidizer component, a metal component, or combinations thereof.

First claim

We claim:

1. A down hole modular rock fracturing system comprising:
one or more multiphase explosive containers comprising a precursor composition located down hole;
one or more liquid supply containers comprising liquid fuel;
one or more venting containers;
liquid supply pipes connecting the liquid supply containers to the multiphase explosive containers;
a remote valve or pump located in the liquid supply pipes between the liquid supply containers and the explosive containers thereby separating the liquid fuel from the precursor composition;
a vent pipe connecting the multiphase explosive containers to the venting containers; and
a control cable connected to the remote valve or pump, wherein the remote valve is configured to be opened or the pump activated at a signal from the control cable and wherein when the valve is opened or the pump is activated, the liquid fuel moves through the liquid supply pipes into the multiphase explosive containers thereby creating an explosive composition;
wherein at least two of the multiphase explosive containers, liquid supply containers, and venting containers are located below ground and are mechanically coupled together downhole with a mechanical container coupling or are internally coupled together with an interior sealing spool.

2. The system of claim 1 , wherein the precursor composition comprises an oxidizer, a metal, or a combination thereof.

3. The system of claim 1 , wherein the explosive composition comprises an energy density once detonated from 4 kJ/cc to 17 kJ/cc.

4. The system of claim 1 , wherein the one or more liquid supply containers and the one or more venting containers are located above ground.

5. The system of claim 1 , wherein the one or more liquid supply containers and the one or more venting containers are located below ground.

6. The system of claim 1 , wherein one or more of the multiphase explosive containers is cylindrical and comprises:
a cylindrical outer casing;
a cylindrical intermediate shell; and
a cylindrical central shell;
wherein precursor composition is located in the annular space between the outer casing and the intermediate shell and wherein the intermediate shell and central shell comprise fill holes; and
wherein the central shell is connected to the liquid supply pipes.

7. The system of claim 1 , wherein one or more of the multiphase explosive containers is cylindrical and comprises:
an outer casing;
an internal perforated vent pipe connected to the vent pipe;
a perforated liquid supply pipe connected to the supply pipe; and
a precursor composition;
wherein when the multiphase explosive container is angled horizontally, the internal liquid supply pipe is located at the bottom of the container and the internal vent pipe is located at the top of the container such that liquid running through the internal liquid supply pipe exits through the perforations in the internal perforated liquid supply pipe, fills the container, and exits through the internal vent pipe.

8. The system of claim 1 , wherein two or more of the explosive containers, liquid supply containers, and venting containers located down hole are mechanically coupled together with a mechanical container coupling.

9. The system of claim 8 , wherein the mechanical container coupling is a split clamp.

10. The system of claim 9 , wherein the split clamp comprises a plurality of engaging tooth features located between the split clamp and the exterior of the container, and wherein when mated, a clearance gap is achieved between the engaging teeth to allow for angular misalignment of container central axis.

11. The system of claim 10 , wherein the clearance gap between mating teeth is greater than 0.015 inches.

12. The system of claim 1 , wherein at least two of the explosive containers, liquid supply containers, and venting containers located down hole are internally coupled together with an interior sealing spool.

13. The system of claim 12 , wherein the interior sealing spool additionally comprises O-rings, x-rings, or combinations thereof.

14. The system of claim 1 , wherein the first multiphase container comprises an inner extension portion comprising at least one sealing channel and at least one locking channel and the second multiphase container comprises at least one outer extension portion configured to interlock with the inner extension portion of the first container and comprises at least one sealing channel and at least one locking channel, wherein the sealing and locking channels of the inner and outer extension portions overlay one another and wherein the sealing channel comprises an o-ring and the locking channel comprises rigid locking tape.

15. A down hole modular rock fracturing system comprising:
one or more multiphase explosive containers comprising a precursor composition located down hole;
one or more liquid supply containers comprising liquid fuel;
one or more venting containers;
liquid supply pipes connecting the liquid supply containers to the multiphase explosive containers;
a remote valve or pump located in the liquid supply pipes between the liquid supply containers and the explosive containers thereby separating the liquid fuel from the precursor composition;
a vent pipe connecting the multiphase explosive containers to the venting containers; and
a control cable connected to the remote valve or pump, wherein the remote valve is configured to be opened or the pump activated at a signal from the control cable and wherein when the valve is opened or the pump is activated, the liquid fuel moves through the liquid supply pipes into the multiphase explosive containers thereby creating an explosive composition;
wherein one or more of the multiphase explosive containers is cylindrical and comprises:
a cylindrical outer casing;
a cylindrical intermediate shell; and
a cylindrical central shell;

wherein precursor composition is located in the annular space between the outer casing and the intermediate shell and wherein the intermediate shell and central shell comprise fill holes; and
wherein the central shell is connected to the liquid supply pipes.

16. The system of claim 15 , wherein the precursor composition comprises an oxidizer, a metal, or a combination thereof.

17. The system of claim 15 , wherein the explosive composition comprises an energy density once detonated from 4 kJ/cc to 17 kJ/cc.

18. A down hole modular rock fracturing system comprising:
one or more multiphase explosive containers comprising a precursor composition located down hole;
one or more liquid supply containers comprising liquid fuel;
one or more venting containers;
liquid supply pipes connecting the liquid supply containers to the multiphase explosive containers;
a remote valve or pump located in the liquid supply pipes between the liquid supply containers and the explosive containers thereby separating the liquid fuel from the precursor composition;
a vent pipe connecting the multiphase explosive containers to the venting containers; and
a control cable connected to the remote valve or pump, wherein the remote valve is configured to be opened or the pump activated at a signal from the control cable and wherein when the valve is opened or the pump is activated, the liquid fuel moves through the liquid supply pipes into the multiphase explosive containers thereby creating an explosive composition;
wherein one or more of the multiphase explosive containers is cylindrical and comprises:
an outer casing;
an internal perforated vent pipe connected to the vent pipe;
a perforated

Assignees

• Los Alamos Nat Security Llc
• Triad Nat Security Llc

Inventors

• Mace Jonathan Lee
• Tappan Bryce C
• Bronisz Lawrence E
• Morgan Jonathan
• Bowden Patrick
• Preston Daniel
• Seitz Gerald J
• Morgan Nathaniel

Classifications

• F42D1/02

  Arranging blasting cartridges to form an assembly (adaptation of blasting cartridges therefor F42B3/02) · CPC title

• E21B34/06

  in wells · CPC title

• E21B43/263 Primary

  using explosives · CPC title

• F42D1/10

  Feeding explosives in granular or slurry form; Feeding explosives by pneumatic or hydraulic pressure · CPC title

• E21B43/248

  using explosives · CPC title