US-12624618-B2 - Detonation module

Abstract

A detonation module for a perforation tool includes an end that may receive and couple to a ballistic transfer unit of the perforation tool, a detonator, a switch circuit electrically coupled to the detonator, an electrical contact electrically coupled to the switch circuit, and an electrically conductive, compressive member that may couple to the ballistic transfer unit of the perforation tool and form a compressive electrical connection between the electrical contact and the ballistic transfer unit. The electrical contact is disposed between the detonator and the electrically conductive, compressive member.

Inventors

• Indranil Ghosh
• Anjali Vijay Dhobale
• Richard Lee Warns
• Juan Carlos Luna Diaz
• Andreas Hendrawinata
• Tommy Nguyen
• Sonia Ried James

Assignees

• SCHLUMBERGER TECHNOLOGY CORPORATION

Dates

Publication Date

20260512

Application Date

20250303

Claims (20)

1. 1 . A detonation module for a perforation tool, the detonation module comprising: an end configured to receive and couple to a ballistic transfer unit of the perforation tool; a detonator; a switch circuit electrically coupled to the detonator; an electrical contact electrically coupled to the switch circuit; and an electrically conductive, compressive member configured to directly couple to the ballistic transfer unit of the perforation tool and form a compressive electrical connection between the electrical contact and the ballistic transfer unit, wherein the electrical contact is disposed between the detonator and the electrically conductive, compressive member.
2. 2 . The detonation module of claim 1 , wherein the detonator, the electrical contact, and the electrically conductive, compressive member are substantially coaxial.
3. 3 . The detonation module of claim 1 , wherein the electrical contact comprises a compressive member.
4. 4 . The detonation module of claim 1 , wherein the electrically conductive, compressive member is annular.
5. 5 . The detonation module of claim 1 , comprising a shielding circuit coupled to the switch circuit.
6. 6 . The detonation module of claim 5 , wherein the shielding circuit comprises a ferrite bead disposed around a wire that electrically couples the detonator to the shielding circuit.
7. 7 . The detonation module of claim 5 , wherein the shield circuit comprises a capacitive component.
8. 8 . A method of activating a perforation tool, comprising: inserting a first end of a perforation unit into a second end of a detonation module, thereby electrically connecting the perforation unit to the detonation module via an electrical contact and an electrically conductive member, wherein the electrically conductive member is configured to directly couple to the first end of the perforation unit and form an electrical connection between the electrical contact and the first end of the perforation unit; electrically connecting the electrical contact with a switching circuit in the detonation module, wherein the electrical contact is disposed between a detonator and the electrically conductive member; electrically connecting the switching circuit to the detonator in the detonation module; and causing an electrical impulse to be sent from the switching circuit to the detonator.
9. 9 . The method of claim 8 , wherein the detonator, the electrical contact, and the electrically conductive member are substantially coaxial.
10. 10 . The method of claim 8 , wherein the first end of the perforation unit comprises a ballistic transfer unit of the perforation unit.
11. 11 . The method of claim 8 , wherein the electrical contact is annular, compressive, or both.
12. 12 . The method of claim 8 , wherein the electrically conductive member is annular.
13. 13 . The method of claim 8 , wherein the electrically conductive member is an electrically conductive, compressive member, and wherein the electrical connection between the electrical contact and the first end of the perforation unit is a compressive electrical connection.
14. 14 . A perforation tool, comprising: a perforation unit configured to house one or more shaped charges; and a detonation module coupled to the perforation unit, the detonation module comprising: an end configured to receive and couple to the perforation unit; a detonator; a switch circuit electrically coupled to the detonator; an electrical contact electrically coupled to the switch circuit; and an electrically conductive member configured to directly couple to a portion of the perforation unit and form an electrical connection between the electrical contact and the portion of the perforation unit, wherein the electrical contact is disposed between the detonator and the electrically conductive member.
15. 15 . The perforation tool of claim 14 , wherein the detonator, the electrical contact, and the electrically conductive member are substantially coaxial.
16. 16 . The perforation tool of claim 14 , wherein the detonation module comprises a shielding circuit.
17. 17 . The perforation tool of claim 16 , wherein the shielding circuit comprises a ferrite bead disposed around a wire that electrically couples the detonator to the shielding circuit, a capacitive component, or a combination thereof.
18. 18 . The perforation tool of claim 14 , wherein the electrical contact is annular.
19. 19 . The perforation tool of claim 14 , wherein the electrically conductive member is an electrically conductive, compressive member, and wherein the electrical connection between the electrical contact and the portion of the perforation unit is a compressive electrical connection.
20. 20 . The detonation module of claim 14 , wherein the portion of the perforation unit comprises a ballistic transfer unit of the perforation unit.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This patent application is a continuation of co-pending U.S. patent application Ser. No. 18/360,364, filed Jul. 27, 2023, now U.S. Pat. No. 12,241,341, which claims priority to and benefit of U.S. Provisional Patent Application Ser. No. 63/369,536 filed Jul. 27, 2022, both of which are herein incorporated by reference. FIELD This patent application addresses hardware for stimulating hydrocarbon reservoirs. Specifically described herein is hardware for use in perforating wells drilled into geologic formations. BACKGROUND This section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present techniques, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these elements are to be read in this light, and not as an admission of any kind. Hydrocarbon reservoirs are commonly stimulated to increase recovery of hydrocarbons. Hydraulic fracturing, where a fluid is pressurized into the reservoir at a pressure above the fracture strength of the reservoir, is commonly practiced. In most fracturing practice, a well is drilled into the formation and a casing is formed on the outer wall of the well. The casing is then perforated using explosives to form holes in the casing that can extend a short distance into the formation from the well wall. Perforation creates holes extending from the well wall into the formation. Perforation tools commonly employ multiple individual perforation “guns” that can be activated to perforate different parts of a well. These guns may be activated at different depths selected to access target areas of the formation. Activation of selected guns is achieved by sending signals to the controller for each gun to activate a switch, which provides electrical connection to the detonator for the selected gun. When the switch is activated, electrical energy can then be coupled to the detonator by a separate firing circuit. Connection of the circuit and firing the circuit are frequently performed as two separate actions in order to prevent unwanted firing of guns. The “arming” circuit and activity add complexity to the selective firing of perforation guns in a perforation tool. Simplification of the process and architecture of perforation tools, without compromising safety, is needed. SUMMARY A summary of certain embodiments described herein is set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of these certain embodiments and that these aspects are not intended to limit the scope of this disclosure. Embodiments described herein provide a detonation module for a perforation tool, the detonation module comprising a detonator; a switch circuit disposed in a fluid-sealed housing and electrically coupled to the detonator; a shielding circuit coupled to the switch circuit; an annular electrical contact electrically coupled to the switch circuit; and an annular, electrically conductive, compressive member to form a compressive electrical connection with an end of a shaped charge unit. Other embodiments described herein provide a method of activating a perforation tool, comprising electrically connecting the perforation tool to a detonation module using two annular electrical contacts, at least one of which is compressive; electrically connecting at least one of the annular electrical contacts with a switching circuit in the detonation module; electrically connecting the switching circuit to a detonator and to a shielding circuit in the detonation module, the shielding circuit comprising at least one RF mitigation component; arranging the annular electrical contacts to provide a fluid pathway for transmitting ballistic discharge from the detonator to the perforation tool; and delivering an electrical impulse from the switching circuit to the detonator. Other embodiments described herein provide a perforation tool, comprising a perforation unit to house shaped charges; and a detonator module coupled to the perforation unit, the detonation module comprising a detonator; a switch circuit disposed in a fluid-sealed housing and electrically coupled to the detonator; a shielding circuit coupled to the switch circuit; an annular electrical contact electrically coupled to the switch circuit; and an annular, electrically conductive, compressive member to form a compressive electrical connection between the annular electrical contact and an end of the perforation unit. Various refinements of the features noted above may be undertaken in relation to various aspects of the present disclosure. Further features may also be incorporated in these various aspects as well. These refinements and additional features may exist individually or in any combi