MWD tool for deep, small diameter boreholes

Details MWD tool for deep, small diameter boreholes MWD tool for deep, small diameter boreholes

1991-03-18

1992-03-17

Bui, Thuy M.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

175 50, G01V 140

Patent

active

050960016

ABSTRACT:
An MWD tool includes a mud pulse generator for operation in an upper section of borehole, a sensor portion for operating close to the drill bit in a deep small diameter section of the borehole and a connector portion running inside the drill pipe for conducting output signals of the sensor portion to the mud pulse generator for subsequent transmission to a receiver at the surface of the borehole.

REFERENCES:
patent: 3790930 (1974-02-01), Lamel et al.
patent: 3906435 (1975-09-01), Lamel et al.
patent: 4628495 (1986-12-01), Peppers et al.

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