RETRANSLATION MODULE FOR TELEMETRY SYSTEM WITH ELECTROMAGNETIC COMMUNICATION CHANNEL (VARIANTS) Russian patent published in 2007 - IPC E21B47/12 

FIELD: well drilling, possible use for organizing a communication channel under conditions, which are unfavorable for electromagnetic channel.

SUBSTANCE: in accordance to invention, in first variant the retranslation module contains a body, which includes installed pulsar, electronics block, isolating insert and contact bar, connected to the body through contact device or extender bar and contact device, or geophysical cable and contact device. Contact device may be made in form of, for example, cross-piece or a contact which opens itself under effect of a flow of liquid. In another variant of retranslation module, electronics block is directly connected to contact bar, on which a toroidal inductiveness coil is positioned. Both clamps of the coil are connected to input of electronics block, and contact bar is connected to body of retranslation module through a contact device. Toroidal inductiveness coil may be mounted on an extender-bar, connected to the contact bar. In third variant of retranslation module, toroidal inductiveness coil is positioned on its body. One end of the coil is connected to the body, and another end is connected to the contact bar.

EFFECT: increased signal transfer reliability during drilling of wells under conditions which are unfavorable for passage of electromagnetic signal.

3 cl, 7 dwg