초록 ▼

This invention relates to a logging tool housing construction for use with gamma ray logging devices. The tool housing is constructed of materials designed for maximum transmission of low energy natural gamma ray energies (E=150-300 Kev). The housing material which encloses a gamma ray detector is a

This invention relates to a logging tool housing construction for use with gamma ray logging devices. The tool housing is constructed of materials designed for maximum transmission of low energy natural gamma ray energies (E=150-300 Kev). The housing material which encloses a gamma ray detector is a tubular, filament wound graphite composition and has a tubular metal sleeve for wear protection. The core and tubular metal sleeve are constructed and interconnected to meet mechanical and pressure requirements for oil well logging use.

대표청구항 ▼

A well logging tool sized and adapted for passage through a well borehole for use in detecting naturally occurring gamma rays, said logging tool comprising: at least one pair of threadedly interconnecting tubular members, said tubular members when interconnected defining a frusto-conical recess, a t

A well logging tool sized and adapted for passage through a well borehole for use in detecting naturally occurring gamma rays, said logging tool comprising: at least one pair of threadedly interconnecting tubular members, said tubular members when interconnected defining a frusto-conical recess, a tubular composite low atomic number member having at least one end with a complementarily shaped frusto-conical end for tight reception in said recess, a tubular elastomeric sealing member enclosing said low atomic number member; wear resistant outer means enclosing said sealing member for protecting said sealing member from abrasion with the borehole; and means disposed within said low atomic number member for detecting gamma rays and separating them into an energy spectrum.