PDC drill 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 drill bits, reduced speed-up effect, irregular vibration, etc. quick effect

Active Publication Date: 2021-02-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • 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] Therefo...

Method used

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  • PDC drill bit
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Examples

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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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PUM

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Abstract

The invention provides a PDC drill bit. The PDC drill bit comprises a drill bit body, wherein the drill bit body is provided with a plurality of circumferentially arranged blades, each blade comprisesa first-stage blade, a second-stage blade and a gauge protection part, the first-stage blade wing comprises an inner cone part, a crown arc part, a first outer cone arc part and a first straight linesection part, the second-stage blade wing comprises a second outer cone arc-shaped part and a second straight line section part, the lower end of the first straight line section part is connected with the upper end of the second outer cone arc-shaped part, the inner cone part, the crown arc part, the first outer cone arc part, the first straight line section part, the second outer cone arc part,the second straight line section part and the gauge protection part are each provided with cutting teeth. According to the PDC drill bit, the drilling speed in the oil-gas exploration and developmentwork of a deep well, an ultra-deep well and a large-diameter well section is improved, and the service life of the drill bit is 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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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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