Bottom-hole information collecting equipment
AssigneeAkishima Laboratories(Mitsui Zosen) Inc.
InventorsHajime Yuasa, Kazuho Hosono
Life of this patent
Estimating the term…
Abstract
A bottom-hole information collecting equipment to collect data at the bottom part of the shaft in real time by the sonde throughout an excavation by the bit for digging. The sonde is provided to be mechanically and electronically connected to or separated from the connecting pipe to which the bite is attached arbitrarily. Data collected by several sensors near the bit is transmitted to the sonde via the electromagnetic coupler. The electricity for the sensors and the sonde can be obtained by respective generators of which one is in the sonde and the other is in the connecting pipe.
Claims11
An information collecting apparatus for collecting a plurality of drilling data signals from a bottom of an earthen shaft being drilled excavating equipment including a plurality of hollow digging pipes coupled end to end, a rotatable drilling bit which scrapes away earthen rock and sand to form said shaft, and a connecting pipe for coupling said drilling bit to a first pipe of said plurality of drilling pipes, said drilling bit discharging a muddy water from a free end thereof, said muddy water being transported to said drilling bit from within said plurality of digging pipes and said connecting pipe, said information collecting apparatus comprising:
- a sonde disposed within said first pipe and having a first end thereof being mechanically engageable with said connecting pipe;
- a plurality of sensors provided in said connecting pipe, each said sensor collecting one of said plurality of data signals from said bottom of the shaft;
- and
- means for coupling said plurality of sensors to said sonde.
Dependencies are inferred from the claim text.