Using a Combination of a Perforating Gun with an Inflatable to Complete Multiple Zones in a Single Trip

Patent metadata

Field	Value
Publication number	US-2016348485-A1
Application number	US-201615232421-A
Country	US
Kind code	A1
Filing date	Aug 9, 2016
Priority date	Dec 24, 2013
Publication date	Dec 1, 2016
Grant date	—

Abstract

A one trip system for perforating and fracking multiple intervals uses a releasable barrier. The barrier can be an inflatable. A pressure booster system is associated with the BHA so that the existing hydrostatic pressure is boosted when the gun or portions thereof are fired. After firing in one interval, the BHA is raised and the barrier is redeployed and the pattern repeats. Instruments allow sensing the conditions in the interval for optimal placement of the gun therein and for monitoring flow, pressure and formation conditions during the fracturing. Circulation between gun firings cleans up the hole. If run in on wireline a water saving tool can be associated with the BHA to rapidly position it where desired. A multitude of perforation charges mounted in the BHA can be selectively fired by selected corresponding detonator based on a predetermined sequence or surface telemetry command.

First claim

We claim:

1 . A well treatment assembly, comprising:
a gun comprising at least one explosive charge; at least one borehole barrier selectively actuated adjacent said gun to isolate a portion of a borehole that includes said gun; a pressure boost device mounted adjacent said gun to boost pressure into said gun as said gun is fired whereupon said device delivers a pulse of pressure through said gun, where said charge was located, to the formation penetrated by firing said gun.

2 . The assembly of claim 1 , wherein:
said pressure boost device boosts the hydrostatic pressure around said gun.

3 . The assembly of claim 1 , wherein:
said at least one borehole barrier comprises spaced barriers with said gun between said barriers.

4 . The assembly of claim 3 , wherein:
said pressure boost device boosts the hydrostatic pressure between said spaced barriers.

5 . The assembly of claim 1 , wherein:
said gun further comprising an inlet for pressurized fluid from a remote location directed through said gun with said pulse.

6 . The assembly of claim 1 , wherein:
said at least one borehole barrier is resettable for repositioning in the borehole for additional firing of said gun at a different location.

7 . The assembly of claim 1 , wherein:
said gun and barrier are supported on a wireline for selective operation thereof.

8 . The assembly of claim 1 , further comprising:
at least one sensor for locating existing fractures in the borehole for transmitting said locations to a surface location; said gun located in said borehole away from said existing fractures for refracturing.

Assignees

• Baker Hughes Inc

Inventors

• Castillo Homero C
• Fanini Otto N

Classifications

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title

• E21B43/11852 Primary

  hydraulically actuated · CPC title

• E21B33/12

  Packers; Plugs (used for cementing E21B33/134, E21B33/16) · CPC title

• E21B47/065

  Fixed Constructions · mapped topic

• E21B43/26 Primary

  by forming crevices or fractures · CPC title