This paper briefly introduces the design of SDQ-91 directional coringapparatus, selection of SDQ-91 borehole measuring instrument and its improvement.
介绍了SDQ - 91型随钻测量定向取心钻具的特点、定向取心器的研制、随钻测量仪的选型与改进等。
2
Two patent technologies about apparatus for pressure coring are introduced and some achievements of China in this field are enumerated. At last, some questions are brought forward.