Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure
In a cased borehole which penetrates a hydrocarbon-containing formation, the method of perforating the casing while measuring the downhole pressure adjacent to the formation is described comprising the steps of: positioning a perforating gun within the casing adjacent to the formation to be completed, the perforating gun being connected to one end of a string of tubing; attaching a downhole end of a gun firing mechanism to a downhole end of a flow tube; connecting an uphole end of the flow tube to a pressurized fluid source; lowering the gun firing mechanism into the borehole through the string of tubing connected to the perforating gun; establishing a flow of fluid through the flow tube into the borehole; measuring the flow and pressure of the fluid at the uphole end of the flow tube and determining the pressure at the downhole end thereof; and manipulating the flow tube to fire the perforating gun and simultaneously measuring downhole pressure.
- Assignee:
- Geo Vann, Inc., Houston, TX
- Patent Number(s):
- US 4598771
- OSTI ID:
- 5433776
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
BOREHOLES
CAVITIES
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
FLOW RATE
FLUID FLOW
GUNS
HOISTING
HYDROCARBONS
MATERIALS HANDLING
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
PERFORATION
PIPES
POSITIONING
PRESSURE MEASUREMENT
PRESSURIZING
RESERVOIR PRESSURE
WELL CASINGS
WELL COMPLETION
WELL PRESSURE
WELLS