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pdc bit

A drill bit and outer cone technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of short service life of the drill bit, reduce the speed-up effect, irregular vibration, etc. The effect of service life

Active Publication Date: 2022-03-22
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dual-stage PDC bit in the prior art is prone to irregular vibrations during drilling, and has the problem of large torque, which reduces the speed-up effect and has a short life
[0005] Therefore, in the oil and gas exploration and development of deep wells, ultra-deep wells, and large-diameter well sections, there are technical problems such as slow drilling speed and short service life of drill bits

Method used

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] The present invention provides a kind of PDC drill bit, and this PDC drill bit comprises drill bit body 10; As Figure 1 ~ Figure 4 As shown, the drill bit body 10 is provided with a plurality of circumferentially arranged blades 20. The blades 20 include: a first-stage blade 30, a second-stage blade 40, and a gauge portion 50. The first-stage blade 30 includes an inner Taper portion 31, crown arc portion 32, first outer cone arc portion 33, and first s...

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Abstract

The invention provides a PDC drill bit, the PDC drill bit includes a drill body; the drill body is provided with a plurality of circumferentially arranged blades, and the blades include a first-stage blade, a second-stage blade and a gage portion; the first The first-stage blade includes an inner cone, a crown top arc, a first outer cone arc, and a first straight line segment; the second-stage blade includes a second outer cone arc, and a second straight line segment; The lower end of the first straight line segment is connected to the upper end of the second outer cone arc; the inner cone, the crown arc, the first outer cone arc, the first straight line, and the second outer cone arc The part, the second straight line part and the gage part are respectively provided with cutting teeth. Through the present invention, the drilling speed in oil and gas exploration and development of deep wells, ultra-deep wells and large-diameter well sections can be improved, and the service life of drill bits can be prolonged.

Description

technical field [0001] The invention relates to the technical field of drill bits, in particular to a PDC drill bit. Background technique [0002] Drilling engineering is an important means and link in the exploration and development of oil and natural gas, and the drill bit is an indispensable drilling tool in the geological drilling industry. Reasonable selection of drill bits has a huge impact on oil drilling quality, drilling speed and drilling cost. [0003] In the oil and gas exploration and development of deep wells, ultra-deep wells, and large-diameter well sections, the traditional PDC bit has low rock-breaking efficiency, slow mechanical penetration rate and short footage of a single bit during the drilling process, and the bit failure is serious. The service life is shorter. [0004] The double-stage drill bit refers to a rock-breaking tool composed of a pilot bit with a smaller diameter at the front end and a reaming bit with a larger diameter at the rear end. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/43E21B10/60E21B10/54
CPCE21B10/43E21B10/602E21B10/54
Inventor 史怀忠史杏杏陈振良黄中伟张逸群赫文豪熊超
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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