Downhole build-up pressure test using coiled tubing

Details Downhole build-up pressure test using coiled tubing Downhole build-up pressure test using coiled tubing

1998-12-24

2000-09-12

Mai, Lanna

Wells

Processes

With indicating, testing, measuring or locating

7315222, 7315236, E21B 4700

Patent

active

061163406

ABSTRACT:
A method and an apparatus for carrying out a downhole shut-in, pressure build-up test of a formation by lowering a string of coiled tubing having a pressure sensor and a packer thereon through the production tubing of the well. The packer is set to isolated the formation and the pressure is then measured by the pressure sensor. If the well is not flowing due to fluid standing in the wellbore, the well is first unloaded by flowing fluid down the coiled tubing to lift the fluid and reestablish flow into the well prior to setting the packer.

REFERENCES:
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patent: 5287741 (1994-02-01), Schultz et al.
patent: 5350018 (1994-09-01), Sorem et al.
patent: 5651664 (1997-07-01), Hinds et al.
patent: 5803186 (1998-09-01), Berger et al.
"Permanent and retrievable pressure gauges" Flopetrol-Schlumber Catalog, 1982-83.
"Hydraulic Pump Systems-Jet Pump" Guiberson-Dresser Catalog, 1982-83.
"Downhole Sensor Package" DSP Dowell-Schlumber Brochure 1998.

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