Diamond drill bit for comprehensive drilling
A diamond drill bit, a comprehensive technology, applied in construction and other directions, can solve the problems of shortening the working life of the drill bit and reducing the drilling capacity, and achieve the effects of reducing mud bag phenomenon, improving thermal wear and increasing jetting speed.
Pending Publication Date: 2020-04-21
SOUTHWEST PETROLEUM UNIV +1
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Problems solved by technology
[0005] The purpose of the present invention is to: aim at the deficiency of the hydraulic structure of the existing drill bit, propose a diamond drill bit for comprehensive drilling, effectively improve the shortening of the working life of the drill bit due to the unreasonable hydraulic structure of the drill bit in the process of breaking rocks and the impact of drilling. The problem of declining ability
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Embodiment
[0053] The embodiment of the present invention provides a diamond drill bit suitable for comprehensive drilling. see Figure 1-5 , the drill bit includes a drill body 1, a water hole 3 arranged on the drill body 1, and several blades 2 extending from the drill body 1 or fixed on the drill body 1, and the blades 2 are provided with cutting holes fixed by dimples. Element 4. The drill bit body 1 is provided with at least one nozzle 8, the nozzle 8 includes a mixed fluid 5, and the mixed fluid 5 forms a mixed flow cavity 53, an outlet 54, a central hole 51 communicating with the mixed flow cavity 53, at least two holes connected to the mixed flow Cavity 53 communicates with cut into groove 52 . The central hole 51 is used to form a straight flow of liquid in the mixed flow chamber 53 , and the cut-in groove 52 is used to form a swirl flow of liquid in the mixed flow chamber 53 . The outlet 54 is used to form a channel for the liquid in the mixing chamber 53 to be ejected. In ...
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The invention discloses a diamond drill bit for comprehensive drilling, and belongs to the technical equipment fields of petroleum and natural gas drilling engineering, mine engineering, geological drilling, geothermal drilling, hydrological drilling, tunnel engineering, shielding, non-excavation and the like. The drill bit comprises a drill bit body, a water hole formed in the bit body, and a plurality of cutter wings extending from the drill bit body or fixed to the drill bit body, and fixed cutting elements are arranged on the cutter wings. The drill bit is characterized in that the drill bit further comprises at least one nozzle, and the nozzle comprises a flow mixing body; a flow mixing cavity, an exit port, a central hole communicating with the flow mixing cavity and at least one cut-in groove communicating with the flow mixing cavity are formed in the flow mixing body; and the central hole is used for forming a liquid straight flow in the flow mixing cavity, the cut-in groove isused for forming a liquid swirling flow in the flow mixing cavity, and the exit port is used for forming a channel for liquid ejection in the flow mixing cavity. The invention aims to provide the diamond drill bit suitable for comprehensive drilling, and the problems that in the rock breaking process of an existing drill bit, the working life of the drill bit is shortened and the drilling capacity is reduced due to the unreasonable hydraulic structure are effectively solved.
Description
technical field [0001] The invention belongs to the field of oil and gas drilling engineering, mining engineering, construction foundation engineering drilling construction, geological drilling, geothermal drilling, hydrological drilling, tunnel engineering, shield tunneling and non-excavation and other technical equipment fields. Advanced diamond drill bit. Background technique [0002] Drill bits are rock-breaking tools used to break rocks and form wellbores in drilling engineering. Polycrystalline diamond compact drill bits (PDC bits), roller cone bits, and impregnated diamond bits are commonly used. The PDC bit relies on the polycrystalline diamond composite sheet with high hardness, high wear resistance and self-sharpening ability to shear the rock. The PDC bit has the advantages of high penetration rate, long life and low drilling cost in soft to medium hard formations. , It has been widely used in oil and gas exploration, geothermal drilling operations and other proj...
Claims
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Login to View More IPC IPC(8): E21B10/61
CPCE21B10/61
Inventor 张春亮杨迎新付必伟
Owner SOUTHWEST PETROLEUM UNIV