Drill bit with stabilizer

Abstract

The invention discloses a drill bit with a stabilizer. The drill bit is mainly used in the field of drilling of natural gas and oil and comprises a joint body (1), a drill bit body (12), a piston assembly (3) and a stabilizer structure, the piston assembly (3) is connected on the inner wall of the joint body (1) in a matched manner, the lower end of a lever bearing (10) in the stabilizer structure is axially supported in a groove of the drill bit body (12), a lever (5) is fixed at the upper end of the lever bearing (10) through a pin, one end of the lever (5) is abutted against the piston assembly (3) while the other end of the same is abutted against a roller bearing (6), a piston body (9) is fixed in the side wall of the joint body (1) through threaded connection, a roller (8) is mounted at the rear end of the roller bearing (6), and a spring B (7) is arranged between the roller bearing (6) and the piston body (9). The drill bit has the advantages of capability of avoiding well deviation, long service life and low cost.

Description

technical field [0001] The invention relates to a drill bit with a stabilizer used in technical equipment fields such as petroleum and natural gas drilling engineering, geological drilling, tunnel engineering, and non-excavation. Background technique [0002] With the rapid development of drilling engineering in our country, the requirements for drill bits are getting higher and higher, especially in the hard formation of deep wells and ultra-deep wells, there are many problems. Well deviation is easy to occur in the vertical well section; in drilling, due to the softness and hardness of the geology and the existence of formation dip angle, the wellbore inclination occurs, and the horizontal section is difficult to control the drilling direction because the drill bit lies flat on the well wall, which reduces the The quality of drilling. Due to the existence of the gap between the drill bit and the well wall, the drill bit is in a suspended state, which is prone to vibration...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of drilling engineering in our country, the requirements for drill bits are getting higher and higher, especially in the hard formation of deep wells and ultra-deep wells, there are many problems. Well deviation is easy to occur in the vertical well section; in drilling, due to the softness and hardness of the geology and the existence of formation dip angle, the wellbore inclination occurs, and the horizontal section is difficult to control the drilling direction because the drill bit lies flat on the well wall, which reduces the quality of drilling

Due to the existence of the gap between the drill bit and the well wall, the drill bit is in a suspended state, which is prone to vibration and shock, which makes the drill bit unable to drill smoothly, causing early damage to the cutting teeth of the drill bit, and reducing the service life of the drill bit.

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