Drilling mud density probe

Details Drilling mud density probe Drilling mud density probe

1986-10-15

1987-11-24

Chapman, John

Measuring and testing

Specific gravity or density of liquid or solid

Hydrostatic pressure type

G01N 928

Patent

active

047080183

ABSTRACT:
A self-cleaning probe for a drilling fluid or drilling mud density-testing apparatus comprises an elongated tube through which pressured air is supplied to a nozzle disposed in the mud-immersed end of the tube. A cleaning plunger is normally disposed in an axially spaced, inoperative position relative to the nozzle and is reciprocated by an actuator mounted on the other end of the tube to pass through the nozzle and thereby remove any deposits of congealed mud from the nozzle bore. In a preferred embodiment, a small quantity of water is introduced in the upper end of the tube concurrently with the actuation of the cleaning plunger. This ensures that the congealed mud in the nozzle bore will be sufficiently hydrated to be easily removed by the cleaning plunger. Additionally, the cleaning plunger may be passed through an elastomeric wiping element which removes congealed mud from the plunger before it is again retracted to its inoperative position relative to the nozzle.

REFERENCES:
patent: 3587316 (1971-06-01), Kapteyn
patent: 3613456 (1971-10-01), Hopfe et al.
patent: 4476722 (1984-10-01), Bentkowski

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