Apparatus for monitoring the operation of well bore guns
US4220212A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 1978 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Sep 18, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42D1/045
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In the representative embodiment of the new and improved apparatus disclosed herein for monitoring the operation of perforating guns or core-sampling guns carrying one or more electrically-detonatable charges, an impact-actuated monitoring assembly operatively arranged on the body of the gun includes a motion-responsive switch and solenoid device that are connected to the electrical firing circuit of the gun. As the explosive charges connected to the gun-firing circuit are actuated, the new and improved monitoring assembly of the present invention is effective for cyclically varying the impedance of the firing circuit to provide a series of distinctive surface indications showing that the gun has been successfully fired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.