Articulated downhole instrument assembly for use in a drill...

Details Articulated downhole instrument assembly for use in a drill... Articulated downhole instrument assembly for use in a drill...

E - Fixed Constructions

21

B

255/1

E21B 47/00 (2006.01) E21B 23/14 (2006.01) E21B 47/01 (2006.01) E21B 47/022 (2006.01)

Patent

CA 1318660

ABSTRACT OF THE DISCLOSURE An articulated downhole surveying instrument and method for measuring parameters of a wellbore includes one or more laterally flexible coupling sections. The later- ally flexible coupling sections are rigid in axial tension and axial compression, and are smaller in cross-section than the surveying instrument housing. A separate housing is used for each component of the surveying instrument, and each component housing is interconnected with the laterally flexible coupling. One or more flexible spacer bars are also provided. The spacer bars and coupling sections enable the assembly to be passed through a short-radius angle wellbore with greatly reduced risk of sticking or hanging up.

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