Permanent completion tubing conveyed perforating system

Patent · Tue Jan 06 04:00:00 EST 1987

OSTI ID:7126303

Upchurch, J M

This patent describes a permanent completion tubing conveyed perforating system for a wellbore, comprising: a production tubing string; a packer cooperating with the string to isolate an interval of the wellbore; a perforating gun incorporated into the string for perforating the wellbore in the isolated interval; a firing head incorporated into the string, the firing head being responsive to development thereacross of a predetermined difference between the pressure of fluids in the well annulus above the packer and the pressure of fluids in the isolated interval; a gun removal mechanism included in the string to remove the fun and the firing head from the string after the gun has fired, leaving a passage for the flow of formation fluids from the isolated interval to the surface through the string; means to route pressure to the firing head from the well annulus and from the isolated interval for development of the predetermined pressure; and piston means for sealing communication through the pressure routing means between the annulus and the isolated interval upon removal of the gun and the firing head from the string.

• Assignee: Schlumberger Technology Corp., Houston, TX
• Patent Number(s): US 4633945
• OSTI ID: 7126303
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CONTROL
DETONATIONS
DRILL BITS
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLUID FLOW
FLUIDS
GUNS
NATURAL GAS WELLS
OIL WELLS
PERFORATION
PIPES
PISTONS
PRESSURE CONTROL
RESERVOIR FLUIDS
SEALS
WELL COMPLETION
WELLS