Bulkhead assembly for a tandem sub, and an improved tandem sub
US11255162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2021 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Feb 1, 2041 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/1185
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A bulkhead assembly for transmitting current to a downhole tool such as a perforating gun. The bulkhead assembly comprises a tubular bulkhead body having a bore therein. The bulkhead assembly also includes an electrical contact pin. The contact pin comprises a shaft having a first end and a second end. The shaft is fabricated substantially from brass and comprises a plurality of grooves. At the same time, the bore comprises a profile for mating with and receiving the plurality of grooves. This grooved, mating arrangement increases shear strength of the bulkhead assembly. Preferably, a first end of the electrical contact pin is in electrical communication with a wire within a wellbore. The wire transmits electrical signals from an operator at the surface. The shaft comprises a conical portion proximate the first end that frictionally fits into a mating conical profile of the bore. A tandem sub having an improved electrical communication is also provided herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.