Measuring and testing – Borehole or drilling – Downhole test
Patent
1993-06-29
1994-10-04
Williams, Hezron E.
Measuring and testing
Borehole or drilling
Downhole test
166316, 166 71, 166 77, 73151, E21B 4706, E21B 4700
Patent
active
053515331
ABSTRACT:
The present invention is an improved apparatus and method for measuring downhole flowing and shut-in pressures to determine the condition of the reservoir and the potential of the well as a stimulation candidate. The tool string of the present invention is a novel combination of existing equipment that allows an electronic pressure gauge and shut-in tool to be run into the hole with coiled tubing. The present invention, in most cases, solves the potential problem of having to shut in or kill a flowing well prior to and after performing pressure testing, preventing lost production or potential well damage due to the killing operation. In addition, the present invention provides accuracy over current coiled tubing systems by reducing the effects of wellbore storage on pressure build-up testing.
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G. W. Haws, B. L. Knight, "State-of-the-Art Simultaneous Downhole Flow-Rate and Pressure Measurement Equipment," SPE Production Engineering, Nov. 1991.
Bailey Donald E.
Macadam James M.
Savage Ronald E.
Christian Stephen R.
Duzan James R.
Halliburton Company
Rutherford Keith
Wiggins J. David
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