Boring or penetrating the earth – With signaling – indicating – testing or measuring – Indicating – testing or measuring a condition of the formation
Patent
1981-07-06
1983-08-02
Purser, Ernest R.
Boring or penetrating the earth
With signaling, indicating, testing or measuring
Indicating, testing or measuring a condition of the formation
E21B 4700, E21B 3410
Patent
active
043960715
ABSTRACT:
A mud by-pass regulator apparatus is provided to regulate the flow of drilling fluid or mud through the downhole portion of a power supply in a measurement while drilling system. The mud by-pass regulator apparatus includes a valve, valve actuator, and a valve actuator control operable to regulate the flow of drilling fluid through the power supply within predetermined limits. The apparatus automatically causes the drilling fluid to by-pass the power supply under certain conditions to maintain regulation of the drilling fluid through the power supply so that its operation is maintained within required limits of the downhole portion of the measurement while drilling apparatus. Motion of the valve is accomplished by the valve actuator and the valve actuator control which is responsive to the pressure drop across a motive power source in the downhole power supply.
REFERENCES:
patent: 2787759 (1957-04-01), Arps
patent: 3194325 (1965-07-01), Gianelloni, Jr.
patent: 3802515 (1974-04-01), Flamand et al.
patent: 4184545 (1980-01-01), Claycomb
Bui Thuy M.
Byron Richard M.
Dresser Industries Inc.
Purser Ernest R.
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