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KBF—1型取心工具,是利用孔底泵吸作用实现孔底反循环的一种双层单动取心工具。其特点是:孔底局部反循环功能较强;在岩心卡持方面,适应范围较宽,既适用于采取完整的、也适用于采取十分破碎的岩矿心。该钻具的结构原理见图1。钻具大体可以分为三个部分:1.泵吸部分。由泵吸接头(1)、限流环(2)、及逆止阀(3)组成;2.单动部分。由单动接头压盖(22)密封圈(5)、(13)、垫圈(6)、(12)、止推轴承(8)、(11)、止动轴套(10)、空心轴(4)、及单动接头(7)等组成;3.岩心卡持部分,由卡簧座(19)及多功能卡环(18)组成。
KBF-1 type coring tool is a double-layer single-action coring tool that utilizes hole-bottom pumping to achieve bottom-hole reverse circulation. Its characteristics are: the bottom of the hole local anti-cyclical function stronger; in the core card holder, a wide range of adaptation, both for a complete, also apply to the very broken rock core. The structure of the tool shown in Figure 1. Drilling can be divided into three parts: 1. Pumping part. By the pump suction connector (1), the current limiting ring (2), and the check valve (3) composition; 2 single-action part. It consists of single-action joint gland (22) seals (5), (13), washers (6), (12), thrust bearings 4), and single action joints (7) and other components; 3 core holding part, by the spring seat (19) and multi-function ring (18).