Double-drill-pipe well sinker

Abstract

The invention discloses a double-drill-pipe well sinker which comprises a rack, a traction device arranged on the rack, a power head movably arranged on the rack and drill pipes fixedly arranged at the bottom of the power head. The power head comprises a drilling machine head, movable sleeves fixed to the two sides of the drilling machine head, a motor, a hooking frame, a grout pipe and drill pipe seats fixed to the bottom of the drilling machine head, and the motor, the hooking frame and the grout pipe are fixed to the top of the drilling machine head. The double-drill-pipe well sinker is characterized in that the drill pipe seats comprise an outer drill pipe seat and an inner drill pipe seat arranged in the outer drill pipe seat, the drill pipes comprise an outer drill pipe and an inner drill pipe arranged in the outer drill pipe, and the outer diameter of the inner drill pipe is smaller than the inner diameter of the outer drill pipe; the inner drill pie is in threaded connection with the inner drill pipe seat, and the outer drill pipe is in threaded connection with the outer drill pipe seat. The double-drill-pipe well sinker is stable and reliable and convenient to dismount and mount, achieves multiple purposes, and can effectively solve collapse problems and guarantee production safety.

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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