| Patent Number |
Title Of Patent |
Date Issued |
| 7124029 |
Method for evaluating formation properties |
October 17, 2006 |
| Methods for evaluating the properties of formations surrounding a borehole, include the steps of measuring electrical properties of the formation from within the borehole; deriving a model of parameters of the formation surrounding the borehole; and estimating the properties of the f |
| 7064551 |
Process for determining the resistivity of a formation through which a well equipped with a casi |
June 20, 2006 |
| Process for determining the resistivity (Rt) of a formation (9) surrounding a well (10) equipped with a casing (11) consisting of several casing segments (11.i, 11.s) with an overlapping part (1), and cement (3) in the overlapping part (1), in which a current is injected into the c |
| 6369575 |
Methods and apparatuses for measuring the resistivity of drilling mud in a borehole |
April 9, 2002 |
| A method of measuring the resistivity of drilling mud in a borehole passing through a terrestrial formation includes the steps of a) inserting a sonde into the borehole, the sonde having an elongate body provided with at least one annular current electrode (A.sub.0, A'.sub.0) and at leas |
| 6046593 |
Method/apparatus for measuring mud resistivity using a focused-electrode system |
April 4, 2000 |
| The invention relates to a method of measuring the resistivity of a drilling mud by means of a sonde provided with an annular current electrode (A.sub.0) and with annular guard electrodes (A, A'), current I.sub.0 being emitted into the surrounding formation together with focusing cur |
