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    • 2. 发明专利
    • SWIVEL FOR FEEDING FLUID FROM ROTARY CONNECTION PART
    • JPH07279571A
    • 1995-10-27
    • JP7812394
    • 1994-03-24
    • TOKYU KENSETSU KK
    • TAKASU MOTOYUKIHARA KOICHIFUKUDA SUMIO
    • E21B4/14E21B7/04E21B17/05E21B17/22E21D9/06E21D9/093
    • PURPOSE:To facilitate survey by projecting a center connection pipe from the end part of an outside connection pipe, installing a an opened part for taking-in fluid on the tail end surface of the outside connection pipe, and opening the tail end of the center connection pipe as observation hole towards outside. CONSTITUTION:A rotary joint part 1 is connected at the tail end of a multiple pipe auger shaft 20. Then, the connection part 1 is revolved by a rotary gear 5, and the auger shaft 20 and a multidrill positioned at the top end of the auger shaft 20 are revolved. Then, the compressed air taken in from the taking inlet 7 of a feeding part 2 can be supplied to the inside of an outside connection pipe 4 from the opened surface at the tail end of the outside connection pipe 4. Air is introduced into the space between the center connection pipe 3 and the pipe 4, and is supplied into the multidrill through the feeding passage of the auger shaft 20. Further, when the drilling direction is measured, the measurement machinery is installed in the observation hole 6 of the pipe 3, and survey is carried out. Accordingly, even during the survey, a bank can be maintained in a compressed air state, and the gushing-out of water can be suppressed, and the generation of steam can be prevented, and the correct measurement is enabled at all times.