Steel casing, full casing full rotary drilling machine and drilling method for drilling machine

A full-rotary drilling rig and steel casing technology, applied in drilling equipment and methods, drilling equipment, earthwork drilling and production, etc., can solve problems such as casing scrapping and footage speed reduction
CN109488209AInactive Publication Date: 2019-03-19TENGDA CONSTR GROUP CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TENGDA CONSTR GROUP CORP
Publication Date
2019-03-19
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a steel casing, a full casing full rotary drilling machine and a drilling method for the drilling machine. The steel casing comprises a steel casing body, gear beds, gear sleeves and fasteners. The plurality of gear beds are embedded in the pipe wall at one end of the steel casing body and provided with the gear sleeves for cutting, and the gear beds and the gear sleeves are connected fixedly through the fasteners. Each gear sleeve includes an inner gear sleeve and an outer gear sleeve, the diameter of the circle of the outer contour line of the top of the outer gear sleeve is larger than the outer diameter of the steel casing, and the diameter of the circle of the inner contour line of the top of the inner gear sleeve is less than the inner diameter of the steel casing. The full casing full rotary drilling machine includes the steel casing. According to the drilling method for the full casing full rotary drilling machine, mud is filled between the outer wall ofthe steel casing and an obstacle during the drilling process. The gap between the obstacle and the outer wall of the steel casing is greatly increased, and the penetration speed is increased. At thesame time, the gear sleeves can be replaced, the maintenance cost is reduced, and the life of the steel casing is prolonged.
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Description

technical field

[0001] The invention relates to the technical field of earthwork machinery, in particular to a steel casing, a full casing full-rotation drilling rig and a drilling method for the drilling rig. Background technique

[0002] In recent years, with the rapid development of the domestic economy, the urban construction and redevelopment projects of large and medium-sized cities, the reconstruction of old urban areas, subway tunnels, underground enclosure structures, bridge reconstruction and expansion projects, and other projects have continued to increase, often encountering underground rocks and residual Old concrete structures, old pile foundations and other obstacles. Obstacles often cause underground structures to be rerouted and relocated, which directly affects the construction progress and quality of the project. Therefore, the work of removing underground obstacles is very important.

[0003] The full-casing full-rotary drilling rig can remove or replace...

Claims

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