Perforating gun system
AssigneesHarrison Jet Guns II, L.P., PMR Global, Inc.
InventorsJames F. SHELTON, Dee ESTES, David SCIUTO
Life of this patent
Estimating the term…
Abstract
An improved perforating gun is provided. The perforating gun includes an internal charge holder formed from a conductive material and comprising a grounding tab. The grounding tab protrudes through a first end cap and is in direct electrical contact with a tandem for grounding the internal charge holder. An optional second grounding tab protrudes through a second end cap and is in direct electrical contact with a second tandem. Each end cap includes a contact pin that engages a signal transfer pin contained within a tandem. The contact pins are biased outwardly by respective compression springs, and each compression spring comprises a portion of an electrical path for a firing signal.
Claims20
A perforating gun comprising:
- an outer loading tube including a first box end opposite a second box end for threadably engaging a first tandem and a second tandem, respectively;
- an internal charge holder within the outer loading tube for receiving a plurality of shaped charges, the internal charge holder being formed from a conductive material;
- a first end cap joined to a first end of the internal charge holder, the first end cap including a first contact pin;
- a second end cap joined to a second end of the internal charge holder, the second end cap including a second contact pin;
- and
- a first grounding tab extending axially from the first end of the internal charge holder and protruding from the first end cap for engagement with the first tandem.
A perforating gun comprising:
- an outer loading tube including a first box end opposite a second box end for threadably engaging a first tandem and a second tandem, respectively;
- an internal charge holder within the outer loading tube for receiving a plurality of shaped charges, the internal charge holder being formed from a conductive material;
- a first end cap joined to a first end of the internal charge holder, the first end cap including a first contact pin biased axially outward by a first spring;
- a second end cap joined to a second end of the internal charge holder, the second end cap including a second contact pin biased axially outward by a second spring;
- wherein the first spring and the second spring comprise at least a portion of an electrical path for a firing signal.
A perforating gun system comprising:
- a perforating gun;
- and
- first and second tandems joined to opposing ends of the perforating gun;
- wherein the perforating gun includes:
- an outer loading tube including a first box end opposite a second box end,
- an internal charge holder within the outer loading tube,
- a first end cap joined to a first end of the internal charge holder, the first end cap including a first contact pin biased axially outward by a first spring,
- a second end cap joined to a second end of the internal charge holder, the second end cap including a second contact pin biased axially outward by a second spring, wherein the first spring and the second spring comprise a portion of an electrical path from the first contact pin to the second contact pin.
Dependencies are inferred from the claim text.