Novel PDC drill bit with stable function

Abstract

The invention discloses a novel ODC drill bit with a stale function. The novel ODC drill bit comprises a drill bit base body (1) and a drill bit crown (2) arranged on the drill bit base body (1). A main cutter wing A (3), a main cutter wing B (4) and a main cutter wing C (5) are arranged on the drill bit crown (2), a compound sheet is embedded in each cutting tooth I (6), cutting teeth II are distributed on an auxiliary cutter wing a (7), an auxiliary cutter wing b (8) and an auxiliary cutter wing c (9), the perpendicular distance between the cutter teeth I (6) at the lowermost ends of the main cutter wings and the cutting teeth II (10) at the lowermost ends of the auxiliary cutter wings is H, and H is smaller than 10 mm. The novel ODC drill bit has the advantages that the phenomena that when the requirements for a small number of cutter wings and a high mechanical drilling speed are met, insufficient support of a drill bit to the stratum occurs, the stability is poor, and deflection of a borehole and suppress jump in a soft and hard staggered stratum are likely to be caused are avoided; meanwhile, the rock breaking aggressiveness is improved, the rock braking speed is increased, the service life of the drill bit is prolonged, and the drilling cost is reduced.

Description

technical field [0001] The invention relates to technical equipment fields such as petroleum and natural gas drilling engineering, mining, geological drilling, construction engineering, tunnel engineering, shield tunneling and non-excavation, in particular to a novel PDC drill bit with a stabilizing function. Background technique [0002] In the process of oil and gas field development, the speed and efficiency of drilling determine the speed of oil field development. In the process of drilling, the conventional PDC bit is in the medium-soft formation and the soft formation. The PDC bit with fewer blades is more aggressive than the PDC bit with more blades, and its ROP is also relatively high. However, due to the small number of blades, the support stability for the formation is poor, it is easy to cause the wellbore to deviate, and it is difficult to control the quality of the wellbore; especially when drilling in soft and hard formations, the PDC with a small number of bla...

AI Technical Summary

Problems solved by technology

In the process of drilling, the conventional PDC bit is in the medium-soft formation and the soft formation. The PDC bit with fewer blades is more aggressive than the PDC bit with more blades, and its ROP is also relatively high. However, due to the small number of blades, the support stability for the formation is poor, it is easy to cause the wellbore to deviate, and it is difficult to control the quality of the wellbore; especially when drilling in soft and hard formations, the PDC with a small number of blades When the drill bit enters the formation, it will produce a jumping phenomenon, resulting in the collapse of the composite sheet, reducing the life of the drill bit and increasing the cost of drilling

[0003] At present, the research and development of drill bits with stabilizing function at home and abroad are focused on the change of the number of teeth or the design of the crown curve, but they cannot solve the relationship between the number of blades, the ROP and the stability of the drill well. For changing the PDC drill bit There has been no major breakthrough in the traditional structure

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