COMPLEX GEOPHYSICAL EQUIPMENT ON DRILL PIPES (VERSIONS) Russian patent published in 2010 - IPC E21B47/12 

FIELD: oil and gas production.

SUBSTANCE: according to the first version equipment consists of receiving-recording ground and downhole tool. The latter consists of a turbo-drill with a bore bit, of a directional block, of an autonomous power source, of an electric divider (ED), of a transmitting device and of a geophysical block containing modules of gamma-logging, arrangements of pseudo-lateral logging, deep lateral logging (LL), various depth electro-magnetic logging, and modules of potentials measurement of spontaneous polarisation (MPSP). Also ED is made as tube insertion out of radio transparent material, inside of which there is positioned an arrangement of the electro-magnetic logging module. A lower section of the drill string together with the turbo-drill and the bit operates as a shield electrode of the lateral logging arrangements. The central electrode common for both arrangements is positioned on electrically insulated surface of a power case of the geophysical block. An upper part of the drill string functions as a reverse electrode of the deep arrangement of LL. The reverse electrode of the arrangement of pseudo-lateral logging is installed on external surface of ED. The upper part of the drill string is a reference electrode of both arrangements of LL and module of PSP. A measuring electrode of the module of PSP is positioned on ED. Downhole information is transmitted via a wireless electro-magnetic channel of communication. According to the second version a cable line of communication is used for transmitting bottomhole information during drilling. A source of primary power of the downhole tool and probing current of the depth arrangement of LL corresponds to a grounded generator of alternative current incorporated into the ground tool.

EFFECT: expanded functionality and raised geophysical efficiency.

2 cl, 2 dwg