Method and apparatus for releasing a well perforating gun from a supporting tubing string

Patent · Tue Mar 28 04:00:00 EST 1989

OSTI ID:6114339

Wallbillich, III, T J

This patent describes a method of supporting and releasing a perforating gun from the bottom of a tubular support run into a subterranean well by a tubing string, comprising the steps of: providing a collect on the bottom of the tubular support, the collet having a plurality of radially shiftable latching heads; mounting a pair of sleeves on the perforating gun in upstanding, concentric relation; inserting a downwardly shiftable annular piston in sealable relationship in the annular fluid pressure chamber and above the upwardly facing surface; shearably securing the annular piston to one of the sleeves in a position holding the collet latching heads in engagement with the downwardly facing annular surface, thereby securing the perforating gun to the tubing string for run-in and discharge purposes; creating a fluid pressure in the annular fluid pressure chamber supplied from the tubing string, thereby shearably releasing the piston to move out of engagement with the collet locking heads; and continuing the application of fluid pressure to the piston to engage the position with the upwardly facing surface to in the release of the perforating gun.

• Assignee: Baker Hughes Inc., Houston, TX
• Patent Number(s): US 4815540
• OSTI ID: 6114339
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
INSTALLATION
MECHANICAL STRUCTURES
NATURAL GAS WELLS
OIL WELLS
PERFORATION
PIPES
SUPPORTS
TOOLS
WELL COMPLETION
WELLS