Apparatus for carrying out underground measurements during drill

Details Apparatus for carrying out underground measurements during drill Apparatus for carrying out underground measurements during drill

1975-11-06

1976-11-16

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

E21B 9700

Patent

active

039916103

ABSTRACT:
The invention concerns apparatus for performing underground measurements during drilling of underground strata using conventional measuring instruments. It comprises a closed instrument casing filled with oil, an adaptor coupling the casing to the drilling pipe, a spring holder connected to the instrument casing and carrying damping spring means, a helical plate controlling angular displacement and a piston-and-cylinder displacement control device, a first bore in the adaptor for conveying mud to a downward section of the drilling pipe, a second closable bore in the adaptor for permitting mud to flow from the annular space around the pipe through the instrument casing, and a closable bore in the instrument casing for communicating the pressure in the interior of the drilling pipe to the instrument casing.

REFERENCES:
patent: 3777814 (1973-12-01), Gastavson et al.
patent: 3872721 (1975-03-01), Ilfrey

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