Borehole pressure measuring system

Measuring and testing – Borehole or drilling – Downhole test

Patent

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Details

73714, E21B 4706

Patent

active

045051550

ABSTRACT:
A system for providing a fluid communication path between the surface and a downhole location in a borehole includes a capillary tubing which is secured to the outside of a production pipe string and which is run into the borehole on the pipe string. The tubing is sized to accommodate the downhole injection of treating chemicals into the producing fluid stream, primarily for corrosion control. In many instances it is desirable to make downhole pressure measurements in a producing well. A small solid slickline with an attached plunger is pumped down the chemical injection tubing into a chamber at the bottom of the tubing. The slickline substantially restricts the cross-sectional area of the injection tubing to accommodate accurate direct pressure measurements at the remote downhole location.

REFERENCES:
patent: 2347746 (1944-05-01), McWilliams
patent: 3385358 (1968-05-01), Shell
patent: 3478584 (1969-11-01), Strubahr et al.
patent: 3835929 (1974-09-01), Suman
patent: 3895527 (1975-07-01), McArthur
patent: 3920076 (1975-11-01), Laky
patent: 4200297 (1980-04-01), Tricon

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