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在岩心钻探中,当套管起拔困难时,就要用割管器将套管割断分段起拔.以往使用的离心割管器往往只能用一次,难于修复,而且不同规格的割管器瓦不能通用,针对这些悄况,我们做了若干改进,即改进成组装式的离心割管器.它由刀架和各种规格的刀片组合而成,如图所示,镶有YG_8中八角柱状硬合金的圆环形刀片套在刀架上接头的公螺纹台肩上,刀片上的定位销孔与台肩上的定位销孔吻合,插入定位销后可以防止刀片转动,下接头以螺纹与刀架上接头连接,上紧螺纹,刀片即被压紧固定.上接头顺端有母螺纹可与钻杆连接.使用届若刀片磨损或崩刃,可卸下来在砂轮上打磨锋利或重镶硬质合金
In core drilling, when the casing is difficult to pull out, it is necessary to use a pipe cutter to cut and raise the casing section. The centrifugal cutter used in the past often can only be used once, difficult to repair, and different specifications of the pipe For these quiet conditions, we made some improvements to improve the assembly-type centrifugal pipe cutter. It consists of a combination of a knife holder and a variety of blades, as shown in the figure set in the YG_8 Octagonal cylindrical hard alloy ring blade sets the male screw on the shoulder on the shoulder, the blade positioning pin hole on the shoulder and the positioning of the pin hole coincide, after inserting the positioning pin to prevent the blade rotation, the lower joint to The thread is connected with the connector on the tool holder, the thread is tightened, the blade is pressed and fixed, the upper end of the connector is provided with a female thread which can be connected with the drill rod, the blade of the utility model can be removed by grinding or chipping, Re-cemented carbide