Double-rod well drilling machine

Abstract

The invention discloses a double-rod well drilling machine. The double-rod well drilling machine comprises a rack, a traction device arranged on the rack, a power head movably installed on the rack, drilling rods fixedly installed at the bottom of the power head, wherein the power head comprises a drilling machine head, movable sleeves fixed at two sides of the drilling machine head, a motor fixed at the top of the drilling machine head, a hanging frame, a grouting pipe and drilling rod seats fixed at the bottom of the drilling machine head. The double-rod well drilling machine is characterized in that the drilling rod seats include an outer drilling rod seat and an inner drilling rod seat fixed inside the outer drilling rod seat; the drilling rods include an outer drilling rod and an inner drilling rod arranged in the outer drilling rod; the outer diameter of the inner drilling rod is smaller than the inner diameter of the outer drilling rod; the inner drilling rod is in threaded connection with the inner drilling rod seat; and the outer drilling rod is in threaded connection with the outer drilling rod seat. The double-rod well drilling machine of the invention has the advantages of stability, reliability, easiness in assembly and disassembly and multi-purposed performance. With the double-rod well drilling machine adopted, the problem of landslide can be effectively solved, and safety production can be ensured.

Description

technical field [0001] The invention relates to a well drilling machine, in particular to a double rod well drilling machine. Background technique [0002] Drilling rigs are mainly used to develop groundwater resources, including domestic water, agricultural water and industrial water drilling, and are also suitable for hydrogeological exploration, construction engineering, bridge foundation drilling, etc. The working method of the well drilling rig is the pump suction reverse circulation type, and its working principle is: under the action of the mud pump, the circulating fluid rushes to the working drill bit through the water pump, hose, sealing water hoist and working drill pipe, and will be drilled by the drill bit. The loosened sand and other materials rush up to the wellhead, flow into the sedimentation tank through the backwater ditch, and the settled liquid is sent to the drill bit through the water pump, and the cycle of drilling is completed in this way. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] The defects of existing well drilling machines are: 1. Poor stability and inconvenient disassembly and assembly; Rely on the weight of the drill pipe as the external force, and the downward pressure is insufficient; 5. There is only one drill pipe, which has a single function, and can only be used for drilling and drilling in better soil layers. Drilling holes and drilling wells in the cobblestone layer will cause landslides, which poses a great safety hazard

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