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我队制成一种铁木结构的浅(及中深)孔安全井口台,其使用灵活,工作安全,构造简单.该井口台由三大件组成如图所示.1为底板,由5公厘钢板制成,中间有直径19公分的园孔,可通过19公分以下的肋骨钻头及粗径钻具.底板下面有形状与之相同的木板,木板厚度须根据钻井深度而定.底板1上以螺钉4按装着一钢制的椭园盖扳,其上有以螺钉中心为园心的弧形缺口,口宽较钻杆直径大20公厘.使用方法:用在直孔时,底板的凸出部份刚好插入机架的间隔中;用在斜孔,可制一相应的凹形盖板,在底板和机架之间;升降粗径钻具时,可将木板以螺钉为轴转开,事后冉重新盖土,升降钻杆时,钻杆可从弧形缺口中通过.
Our team has made a shallow (and medium-deep) hole safety wellhead table made of iron-wood structure, which is flexible in use, safe in work, and simple in construction. The wellhead bench is composed of three large parts as shown in Fig. 1. The floor is composed of 5 It is made of steel plate with a diameter of 19 cm in the center and can pass through 19 cm diameter rib drills and large-diameter drills. Below the bottom plate is a wooden board with the same shape. The thickness of the board must be determined according to the drilling depth. The screw 4 is equipped with an elliptic cover plate made of steel and has an arc-shaped notch centered on the center of the screw. The mouth width is 20mm greater than the diameter of the drill pipe. Usage: When used in a straight hole, the base plate The protruding part is just inserted into the space of the frame; for the inclined hole, a corresponding concave cover plate can be made between the bottom plate and the frame; when lifting the large diameter drill tool, the board can be screwed Turning it on, afterwards, the soil is re-covered. When the drill pipe is raised and lowered, the drill pipe can pass through the curved gap.