Granted Patent B2

US 12,618,654 · App. 19/243,432 · Granted May 5, 2026

Inventors: Andrew Prisbell (Sugar Land, TX); Mohamed Mehdi (Houston, TX); Jay Garza (La Marque, TX); Atsushi Nakano (Rosharon, TX)

Assignee: Schlumberger Technology Corporation

F42B39/14E21B43/117E21B43/1185

Abstract

Claims (29)

1 . A method of using a perforation tool, comprising:

disposing a charge module and a bulkhead member within a housing of the perforation tool;

attaching an initiation module to the housing such that the bulkhead member is between the initiation module and the charge module;

installing at least one explosive charge in the charge module;

installing a detonator in the initiation module;

securing a containment cover to the housing to cover the detonator and form a transportable perforation tool, the containment cover comprising a window for detecting discharge of the initiation module before removing the containment cover, the window comprising a light-transmissive material;

causing the transportable perforation tool to be transported to a well site;

at the well site, removing the containment cover from the perforation tool;

attaching the perforation tool to a tool string; and

deploying the tool string into a well.

2 . The method of claim 1 , wherein securing the containment cover comprises operating a threaded connection having a number of threads selected based on a discharge capacity of the initiation module.

3 . The method of claim 1 , wherein securing the containment cover comprises covering the initiation module.

4 . The method of claim 1 , wherein the containment cover has a curved end.

5 . The method of claim 1 , wherein installing the detonator comprises positioning the detonator along a central axis of the perforation tool.

6 . A method comprising,

removing a containment cover from a perforation tool comprising a housing, a charge module within the housing, an initiation module coupled to the housing, and a bulkhead module within the housing between the charge module and the initiation module, the containment cover comprising a window for detecting discharge of the initiation module before removing the containment cover, the window comprising a light-transmissive material;

attaching the perforation tool to a tool string; and

deploying the tool string into a well.

7 . The method of claim 6 , wherein removing the containment cover comprises operating a threaded connection having a number of threads selected based on a discharge capacity of the initiation module.

8 . The method of claim 6 , wherein, prior to removing the containment cover, the containment cover covers the initiation module.

9 . The method of claim 6 , wherein the containment cover has a curved end.

10 . The method of claim 6 , wherein the initiation module comprises a detonator, and wherein the detonator is disposed along a central axis of the perforation tool.

11 . The method of claim 6 , further comprising causing the perforation tool secured with the containment cover to be transported to a well site, including the well, before removing the containment cover from the perforation tool.

12 . The method of claim 6 , further comprising securing the containment cover to the housing to cover the initiation module before removing the containment cover from the perforation tool.

13 . The method of claim 12 , further comprising:

disposing the charge module and a bulkhead member within the housing of the perforation tool; and

attaching the initiation module to the housing such that the bulkhead member is between the initiation module and the charge module.

14 . The method of claim 13 , further comprising installing at least one explosive charge in the charge module.

15 . The method of claim 13 , further comprising installing at least a detonator in the initiation module.

Continuity (3)

References Cited (16)