Patent · US Expired

Pump apparatus including a firing head for use with a perforating gun on a tubing string

US5050672A · kind A · utility

13Cited by

13References

28Claims

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	Jun 23, 1989
Grant date	Sep 24, 1991
Priority date	—
Expiry date	Jun 23, 2009

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.