The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2001
Filed:
Apr. 17, 1998
John William Aidan Millar, Wiltshire, GB;
Richard Hedley Clarke, Wiltshire, GB;
Court Services Limited, , GB;
Abstract
Apparatus and method for measuring the properties of rocks such as permeability, porosity and fluid properties downhole around a borehole (,) in which a seismic source (,) which radiates a seismic signal substantially radially within the borehole is lowered down the borehole (,) and the electrical signal generated by the seismic signal within the surrounding rock is detected by detectors (,) mounted above and below the seismic source (,) so that signals are received from substantially all radial directions. Preferably a continuous wave signal is generated and the signal detected whilst the apparatus (,) is raised or lowered. The apparatus (,) gives a much better and more accurate measurement than previous methods.