【国家标准】 地质岩心钻探钻具

This document specifies the type, specification and series of geological coring drilling tools, the property of drilling tubulars and their interchangeable dimension. The drilling tool included in this document:
—wireline coring drill pipes, common drill pipes and their connection specification;
—coring tools;
—casing and casing accessory.
This document is applicable to the geological core drilling with borehole depth of less than 3 000 m. The standard includes diamond drilling with conventional coring drilling technology and wireline coring drilling technology. It also includes diamond coring drill bit, PDC coring drill bit and tungstencarbide coring drill bit. This document can be a reference to and also can be adopted by the geological foundation drilling and small diameter engineering drilling industry.