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CN201818247U 螺杆钻具定压保护装置 失效 - 权利终止

螺杆钻具定压保护装置
摘要：
一种螺杆钻具定压保护装置。为了克服现有径向水力喷射作业中使用的小直径螺杆钻具管线中没有压力安全保护装置的不足，本实用新型上接头(1)、本体(2)、下接头(17)由上至下依次固定连接，上接头(1)、下接头(17)均有轴向通孔，本体(2)上有液流孔(16)和定压孔(10)2个轴向通孔；定压孔(10)的上端部安装有泄流阀(8)，下端部安装有调压器(14)，泄流阀(8)与调压器(14)之间安装有弹簧(11)。其有益效果是设计合理、结构新颖，防止水力喷射施工中的小直径螺杆钻具因系统压力过大出现卡钻等问题，有效保护螺杆钻具。
摘要（英）：

The utility model discloses a constant pressure protecting device of a screw drilling tool, which is used for overcoming the disadvantage that no pressure safety protecting device exists in a pipeline of the conventional small-diameter screw drilling tool used in the radial hydraulic ejecting work. The constant pressure protecting device comprises an upper joint (1), a body (2) and a lower joint (17) which are fixedly connected sequentially from top to bottom, wherein the upper joint (1) and the lower joint (17) are respectively provided with axial through holes; the body (2) is provided with two axial through holes of a liquid flowing hole (16) and a constant pressure hole (10); the upper end of the constant pressure hole (10) is provided with a drain valve (8) while the lower end is provided with a pressure regulator (14); and a spring (11) is arranged between the drain valve (8) and the pressure regulator (14). The constant pressure protecting device has the benefits of being reasonable in design and novel in structure, preventing the problems of the jamming and the like of the small-diameter screw drilling tool in hydraulic ejecting construction due to overhigh system pressure, and effectively protecting the screw drilling tool.

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