Box by pin perforating gun system

Patent metadata

Field	Value
Publication number	US-11448043-B2
Application number	US-201716322287-A
Country	US
Kind code	B2
Filing date	Aug 2, 2017
Priority date	Aug 2, 2016
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

A box by pin perforating gun system using swaged down gun bodies, a removable cartridge to hold a detonator and switch, and an insulated charge holder as an electrical feed-through.

First claim

What is claimed is:

1. A method of perforating a well comprising:
loading a first perforating gun with perforating charges and an explosive detonating cord, wherein the explosive detonating cord is located proximate to the perforating charges to detonate said perforating charges;
inserting a cartridge holding a detonator into a detonation transfer end fitting having a cylindrical outer housing with an upper end and a lower end and a cylindrical axis, a first bore of a first diameter along the cylindrical axis with a first end being the upper end and a second end, a second bore of a second diameter along the cylindrical axis starting at the second end of the first bore and having a third end, wherein the first diameter is smaller than the second diameter, and a third bore intersecting both the first and second bore and the exterior of the detonation transfer end fitting;
inserting the detonation transfer end fitting into the perforating gun;
inserting the explosive detonating cord into the detonation transfer end fitting;
confirming the detonating cord is correctly inserted into the detonation transfer end fitting visually through the third bore;
assembling the perforating gun in a tool string;
conveying the tool string into the well; and
detonating the perforating charges.

2. The method of claim 1 wherein the cartridge has at least one electrical contact proximate each end.

3. The method of claim 2 wherein at least one of the electrical contacts of the cartridge is resiliently biased.

4. The method of claim 3 wherein at least one of the electrical contacts of the cartridge is a compression spring.

5. The method of claim 2 wherein at least one of the electrical contacts of the cartridge is a pin adapted to engage a socket.

6. The method of claim 5 wherein the socket is resiliently biased toward the pin.

7. The method of claim 2 wherein the cartridge also holds a switch electrically connected to the detonator.

8. The method of claim 1 further comprising:
conveying the first perforating gun to a well site after loading the first perforating gun with perforating charges and detonating cord.

9. The method of claim 1 further comprising:
conveying the first perforating gun to a well site after inserting the cartridge containing the detonator into the perforating gun.

10. The method of claim 1 further comprising:
connecting the first perforating gun to a second perforating gun by threading the body of the first perforating gun directly into the body of the second perforating gun.

11. The method of claim 1 wherein the confirming the detonating cord is correctly inserted include checking the position of the detonating cord through a site glass in the third bore.

Assignees

• Hunting Titan Inc

Inventors

• Bradley Richard Wayne
• Collins William R
• Jordan John W
• Lane Andy
• Langford Dale
• Levine Charles
• Pundole Faraidoon

Classifications

• F42C19/0838

  Primers or igniters for the initiation or the explosive charge in a warhead (F42C19/095 takes precedence) · CPC title

• F42B3/10

  Initiators therefor (percussion fuzes F42C7/00; percussion caps F42C19/10; electric primers F42C19/12) · CPC title

• E21B43/1185

  Ignition systems · CPC title

• E21B43/116 Primary

  Gun or shaped-charge perforators · CPC title

• F42D1/043

  Connectors for detonating cords and ignition tubes, e.g. Nonel tubes (mounting of detonators in blasting cartridges F42B3/26) · CPC title