Box by pin perforating gun system and methods

Patent metadata

Field	Value
Publication number	US-10273788-B2
Application number	US-201515313760-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	May 23, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

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 perforating gun system comprising:
a first gun body having external threads at a first end and internal threads at a second end;
a cartridge holding a detonator;
a shaped charge loading tube having an upper end and a lower end;
an upper end fitting on the upper end of the shaped charge loading tube;
a lower end fitting on the lower end of the shaped charge loading tube;
an upper insulating cap on upper end fitting;
a lower insulating cap on lower end fitting;
wherein the upper and lower end fittings are conductive;
wherein the cartridge has an electrical contact proximate to the detonator; and
wherein the lower end of the loading tube has an electrical contact adapted to contact the electrical contact proximate to the detonator.

2. A perforating gun system comprising:
a first gun body having external threads at a first end and internal threads at a second end;
a cartridge holding a detonator;
a switch electrically connected to the detonator;
at least one insulator between the shaped charge loading tube and the gun body;
wherein the cartridge has at least one electrical contact at each end; and
wherein at least one of the electrical contacts of the cartridge is resiliently biased.

3. The perforating gun system of claim 2 wherein at least one of the electrical contacts of the cartridge is a compression spring.

4. A perforating gun system comprising:
a first gun body having external threads at a first end and internal threads at a second end;
a cartridge holding a detonator;
a switch electrically connected to the detonator;
at least one insulator between the shaped charge loading tube and the gun body;
wherein the cartridge has at least one electrical contact at each end; and
wherein at least one of the electrical contacts of the cartridge is a pin adapted to engage a socket in the upper end fitting of the loading tube.

5. The perforating gun system of claim 4 wherein the socket is resiliently biased toward the pin.

Assignees

• Hunting Titan Inc

Inventors

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

Classifications

• E21B43/117 Primary

  Shaped-charge perforators (E21B43/118 takes precedence) · 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

• F42B3/08

  with cavities in the charge, e.g. hollow-charge blasting cartridges · CPC title

• F42B5/035

  the cartridge or barrel assembly having a plurality of axially stacked projectiles each having a separate propellant charge · CPC title

• E21B17/042

  Threaded · CPC title