Method to create connectivity between wellbore and formation

Patent metadata

Field	Value
Publication number	US-2016003015-A1
Application number	US-201514792704-A
Country	US
Kind code	A1
Filing date	Jul 7, 2015
Priority date	Jul 7, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

A jetting gun placed in a wellbore in a formation for penetrating the formation to create perforation tunnels comprising a pressure vessel, the pressure vessel comprising a propellant chamber and a nozzle, the pressure vessel configured to withstand a pressure of the wellbore, the nozzle embedded in the pressure vessel in a predetermined orientation, such that the propellant chamber is in fluid communication with the wellbore. The propellant chamber fully enclosed within the pressure vessel configured to hold a jetting fluid and an energetic material, wherein the energetic material is operable to generate pressure within the propellant chamber when activated such that the pressure projects the jetting fluid through the nozzle to create an impact fluid to penetrate the formation to create the perforation tunnels. The jetting gun also includes a detonating mechanism configured to activate the energetic material to generate the pressure within the propellant chamber.

First claim

What is claimed is:

1 . A jetting gun placed in a wellbore in a formation for penetrating the formation to create perforation tunnels, the jetting gun comprising:
a pressure vessel, the pressure vessel comprising a propellant chamber and a nozzle, the pressure vessel configured to withstand a pressure of the wellbore;
the nozzle embedded in the pressure vessel in a predetermined orientation, such that the propellant chamber is in fluid communication with the wellbore, the nozzle having a cross-sectional shape; and
the propellant chamber fully enclosed within the pressure vessel, the propellant chamber configured to hold a jetting fluid and an energetic material,
wherein the energetic material is operable to generate pressure within the propellant chamber such that the pressure is operable to project the jetting fluid through the nozzle to create an impact fluid, and
wherein the impact fluid is operable to penetrate the formation to create the perforation tunnels; and

a detonating mechanism, the detonating mechanism configured to activate the energetic material to generate the pressure within the propellant chamber.

2 . The jetting gun of claim 1 , wherein the jetting gun comprises more than one pressure vessel.

3 . The jetting gun of claim 1 , wherein the cross-sectional shape of the nozzle is selected from the group consisting of circular, elliptical, flat, square, rectangular, and triangular.

4 . The jetting gun of claim 1 , wherein the pressure vessel comprises more than one nozzle.

5 . The jetting gun of claim 1 , wherein the jetting fluid is an incompressible fluid.

6 . The jetting gun of claim 1 , wherein the jetting fluid comprises an abrasive solid.

7 . The jetting gun of claim 1 , wherein the energetic material is selected from the group consisting of an explosive, propellant, exothermic reaction chemicals, and combinations thereof.

8 . The jetting gun of claim 1 , wherein the detonating mechanism is selected from the group consisting of an electrical detonator, a percussion detonator, a temperature activator, a chemical reaction activator, and combinations thereof.

9 . The jetting gun of claim 1 , wherein the impact fluid leaves the perforation unobstructed.

10 . The jetting gun of claim 4 , wherein the more than one nozzle is arranged in a perforating configuration, where the perforating configuration is selected from the group consisting of configurations in a transverse plane crossing a wellbore axis, configurations linearly along the wellbore axis, configurations in a helical pattern, and combinations thereof.

11 . The jetting gun of claim 1 , wherein the impact fluid is operable to penetrate a casing and a cement prior to penetrating the formation.

12 . A method of creating perforation tunnels in a formation using a jetting gun, the method comprising the steps of:
introducing the jetting gun into a wellbore in the formation, such that the jetting gun is positioned adjacent to the formation, the jetting gun comprising:
a pressure vessel configured to withstand a pressure of the wellbore, the pressure vessel comprising:
a nozzle, the nozzle embedded in the pressure vessel in a predetermined orientation, such that a propellant chamber is in fluid communication with the wellbore, the nozzle having a cross-sectional shape;
a propellant chamber, the propellant chamber fully enclosed within the pressure vessel, the propellant chamber configured to hold a jetting fluid and an energetic material, and
a detonating mechanism, the detonating mechanism configured to activate the energetic material to generate the pressure within the propellant chamber;

activating the energetic material with the detonating mechanism,
wherein activating the energetic material is operable to generate a pressure within the propellant chamber, and
wherein the pressure is operable to project the jetting fluid through the nozzle to create an impact fluid, where the nozzle is configured to direct the impact fluid onto the formation; and
allowing the impact fluid to penetrate the formation to create the perforation tunnels.

13 . The method of claim 12 , wherein the jetting gun comprises more than one pressure vessel.

14 . The method of claim 12 , wherein the cross-sectional shape of the nozzle is selected from the group consisting of circular, elliptical, flat, square, rectangular, and triangular.

15 . The method of claim 12 , wherein there is more than one nozzle.

16 . The method of claim 12 , wherein the jetting fluid is an incompressible fluid.

17 . The method of claim 12 , wherein the jetting fluid comprises an abrasive solid.

18 . The method of claim 12 , wherein the energetic material is selected from the group consisting of an explosive, propellant, exothermic reaction chemicals, and combinations thereof.

19 . The method of claim 12 , wherein the detonating mechanism is selected from the group consisting of an electrical detonator, a percussion detonator, a temperature activator, a chemical reaction activator, and combinations thereof.

20 . The method of claim 12 , wherein the impact fluid leaves the perforation unobstructed.

21 . The method of claim 12 , wherein the impact fluid penetrates a casing and a cement prior to penetrating the formation.

22 . The method of claim 15 , wherein the more than one nozzle is arranged in a perforating configuration, the perforating configuration is selected from the group consisting of configurations in a transverse plane crossing a wellbore axis, configurations linearly along the wellbore axis, configurations in a helix pattern, and combinations thereof.

Assignees

• Saudi Arabian Oil Co

Inventors

• Chang Fakuen Frank

Classifications

• E21B43/114 Primary

  Perforators using direct fluid action {on the wall to be perforated}, e.g. abrasive jets · CPC title