Drilling construction is a relatively direct method to understand geological and hydrological conditions in engineering surveys. At present, in China's deep overburden drilling, wall protection mainly adopts two methods: drilling fluid retaining wall and pipe drilling. For 100-200m boreholes, the use of specially configured drilling fluids will increase construction costs and affect engineering benefits. Some drilling fluid formulations require accurate proportions, which makes field implementation difficult. The method of following pipe drilling directly isolates the collapsed section due to the pipe following, so the effect is significant, but the pipe following is expensive, the drill bit is worn, and the pipe following efficiency is low. The main steps of follow-up drilling at this stage are:

(1) Bring the screw head into the casing entrance, move the drill to connect the tie rod to the screw head.

(2) Start the drill and press the sleeve in at a predetermined depth.

(3) Lift the sleeve, loosen the screw head, and push the sleeve into the pipe position with a drill.

(4) Unscrew the screw head, lift out the hole and add a new casing.

Since the screw head and the sleeve in the third step of the above process are threaded, the pressure between the threads is very large, and the torque is large during rotation, and the phenomenon of sticking may occur. Therefore, the threaded head must be placed in the hole and the sleeve must be fixed. To remove the screw head. However, the hole section where the casing wall must be lowered is prone to wall collapse, which causes the casing pressure to fail to reach the expected depth, and the pipe must be followed again, which affects the efficiency of the pipe follow .

Follow-pipe drilling is a specific construction technique in which the formation conditions of the drilling process are complex and the hole wall is seriously collapsed. The casing is used to isolate the collapsed part of the hole wall. However, the existing pipe-following construction technology due to the screw head fastening and the excessive torque of the pipe-following, the sleeve can not be directly decomposed to the predetermined position, the sleeve must be drilled, and then the screw head should be manually unscrewed and pressed into the hole. At the bottom, to remove the screw head and add a sleeve. Due to the repetitive nature of this kind of project, it will affect the efficiency of drilling rigs, increase the cost of the project, and extend the duration of the project.

Luoyang Xinben Machinery Equipment Co., Ltd. is located in the High-tech Zone of Luoyang City, Henan Province, with a superior geographical location and convenient transportation. The company was established in 2005 and specializes in the research and development, manufacturing and sales of supporting materials, mining materials and equipment. It has strong research capabilities And production capacity, various sales channels, and excellent after-sales service. Welcome to consult.