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- Title
地浸砂岩型铀矿松散岩层 单动双管取心钻具的研制与试验.
- Authors
李博; 刘晓阳; 王琳; 邓氚军; 杨爱军
- Abstract
In order to solve the problems of poor quality, low efficiency and difficult in core sampling by single-tube core barrels in the loose bed such as deep target/ore host layer, a swivel type double tube core barrels with hydraulically-driven core-out structure and quick release connector were studied and tested by designing and improving the swivel structure, hydraulicallydriven core-out structure and quick release connectors. Two types of SD110 swivel type double tube core barrels with hydraulically-driven core-out and quick release functions were developed and tested. The results show that the SD110 swivel type double tube core barrels can hydraulically drive core out of barrel rapidlly on the surface without removing the inner tube and improve the core-outing efficiency of the double-tube drilling tools; the SDKC110 type drilling tools can quickly disassemble and replace the inner tube to achieve parallel core-outing and drilling operations. Compared with the single-tube core barrels, the average round trip meterage of SD series double-tube drilling tools increased by 28.62% and the average rate of penetration increased by 11.61%; While to the conventional swivel type double tube core barrels, the core-outing operation time of SD series reduced by 32.69%. Thefore SD series swivel type double tube core barrels are suitable for core drilling applications in loose rock, which can effectively improve core drilling efficiency and quality.
- Publication
Uranium Geology, 2024, Vol 40, Issue 1, p181
- ISSN
1000-0658
- Publication type
Article
- DOI
10.3969/j.issn.1000-0658.2024.40.015