Method of and apparatus for telemetering information from a poin

Details Method of and apparatus for telemetering information from a poin Method of and apparatus for telemetering information from a poin

1976-03-08

1978-03-14

Purser, Ernest R.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Measuring or indicating drilling fluid rate of flow

340 18NC, E21C 706

Patent

active

040786200

ABSTRACT:
Down-hole information from rotary well drilling operations is transmitted to a surface or remote location by the venting of drilling fluid from the interior of the drill stem into the bore hole annulus in a binary coded decimal format. A valve is caused to operate by the digital output of one or more down-hole transducers thus releasing and restoring the drilling fluid pressure in the desired sequence. A "sub" contains the necessary electronics, power supply and a motorized valve assembly. Commands from the surface to transmit information from any one of the transducers are transmitted by means of sequential pulses in a binary coded decimal format, in the drilling fluid pressure are provided by the operator by deliberately decreasing and then increasing the surface pump pressure in a sequence to which the applicable down-hole actuating means is responsive.

REFERENCES:
patent: 2925251 (1960-02-01), Arps
patent: 3124882 (1964-03-01), Black
patent: 3555504 (1971-01-01), Fields
patent: 3746106 (1973-07-01), McCullough et al.
patent: 3747059 (1973-07-01), Garcia
patent: 3800277 (1974-03-01), Patton et al.
patent: 3949354 (1976-04-01), Claycomb
patent: 3964556 (1976-06-01), Gearhart et al.

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