Process and device for casing a borehole for the measurement of

Details Process and device for casing a borehole for the measurement of Process and device for casing a borehole for the measurement of

1985-01-30

1987-05-05

Novosad, Stephen J.

Wells

Processes

With indicating, testing, measuring or locating

73155, E21B 4706

Patent

active

046624422

ABSTRACT:
The invention relates to a process and a device for casing a borehole made in a porous medium for measuring the pressure of the interstitial fluid, comprising the positioning, in the borehole, of a tube of which at least one section, located at the altitude of the measurement to be effected, possesses radial orifices along one of its generatrices, a porous band between the borehole wall and the outer surface of the section, at the level of said orifices, and a supple inner membrane in the form of a sleeve fitted on the inner face of the tube, the filling of the tube for applying the membrane against its wall and of the space included between the tube and the borehole to saturate said porous band, and the substitution of the outer liquid by a cement grout which bonds the tube to the walls of the borehole in all its zones exempt of porous band.

REFERENCES:
patent: 2981332 (1961-04-01), Miller et al.
patent: 3534816 (1970-10-01), Showalter
patent: 3592056 (1971-07-01), Bernaix

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