Patent · US Expired

Method of detonating a perforating apparatus on a tubing including lowering one end of a pump and a firing head into said tubing

US5058680A · kind A · utility

4Cited by

11References

15Claims

0Family size

Assignee

SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

Klaus Huber · Effeltrich, DE
A. Glen Edwards · Levelland, US
William McGinley Hill · Pearland, US
Antoni Miszewski · Missouri City, US

Key dates

Filing date	Jul 26, 1990
Grant date	Oct 22, 1991
Priority date	—
Expiry date	Jul 26, 2010

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/11852
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A perforating gun having no firing head and no primary explosives is attached to a tubing string and the tubing string is run into a borehole. A new pump apparatus, having a firing head, is run into the tubing string until the pump firing head is adjacent the perforating gun. The firing head in the pump apparatus detonates, firing the perforating gun. If the firing head fails to detonate, one need only remove the pump apparatus from the tubing string in order to gain access to the firing head, for repair and replacement thereof. One need not remove the tubing string to gain access to the firing head.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.