Hydraulically activated firing head for well perforating guns

Patent · Tue Nov 14 04:00:00 EST 1989

OSTI ID:7053597

Nelson, J A; Stout, G W

This patent describes a cross-over and release mechanism for use in a subterranean well to support other tools from a tubing-carried, retrievable packer settable at any selected location in the well. The packer having a central bore, comprising: a hollow body element sealingly secured to the other tools. The hollow body element defining a central fluid passage communicating at its upper end with the packer bore. The hollow body element also defining at least one radial fluid passageway and the well annulus surrounding the body element, whereby the fluid pressure in the well annulus below the set packer is controlled by the fluid pressure in the tubing; a thin-walled tube secured to the upper end of the body element and projecting upwardly through the packer central bore in inwardly spaced relation to the packer bore wall, thereby defining an axially extending bypass fluid passage through the packer; port means connecting the upper end of the bypass fluid passage to the well annulus above the set packer. The hollow body element further defining an axially extending passage connecting the bypass fluid passage to the interior of the other tools; releasable latch means securing the body element to the packer; and means responsive to tubing pressure for releasing the latch means. Thereby leaving the cross-over tool and the other tolls in the well the packer is retrieved.

• Assignee: Baker Oil Tools, Inc., Orange, CA
• Patent Number(s): A; US 4880056
• Application Number: PPN: US 7-217703A
• OSTI ID: 7053597
• 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
EQUIPMENT
FLUID MECHANICS
HYDRAULIC EQUIPMENT
HYDRAULICS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PERFORATION
TOOLS
WELL COMPLETION
WELLS