Apparatus for carrying out underground measurements during...

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

E - Fixed Constructions

21

B

255/1

E21B 47/06 (2006.01) E21B 47/12 (2006.01)

Patent

CA 1055009

ABSTRACT OF THE DISCLOSURE 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. -1-

237195

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