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Mixed drill bit

A technology of mixing drill bit and bit body, applied in drill bit, earthwork drilling, drilling equipment, etc., can solve the problems of tooth palm falling into well, insufficient connection strength, cracking between tooth palm and bit body, etc., to avoid cracking and ensure connection reliability. , the effect of enhancing the connection strength

Pending Publication Date: 2021-08-03
KINGDREAM PLC CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a hybrid drill bit to solve the problems in the related art that the connection strength between the palm and the drill body is insufficient, the connection reliability is low, the palm and the drill body are prone to cracking, and the accident of the palm falling into the well

Method used

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0034] The embodiment of the present invention provides a hybrid drill bit, which can solve the problems of insufficient connection strength between the tooth palm and the drill bit body, low connection reliability, easy cracking of the tooth palm and the drill bit body, and accidents of the tooth palm falling into the well in the related art ...

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Abstract

The invention relates to a mixed drill bit which comprises a drill bit body, a bit leg and a cone; a stop groove is formed in the drill bit body; the bit leg is fixed on the drill bit body and is provided with a stop block matched with the stop groove; and the cone is fixed on the cone leg. When the cone is subjected to thrust in the radial direction of the drill bit body, the inner wall of the stop groove stops the stop block from moving in the radial direction of the drill bit body. According to the mixed drill bit, when the cone is subjected to outward thrust in the radial direction of the drill bit body and drive the bit leg to tend to move outwards at the same time, the stop block and the stop groove bear most thrust, so that the connection strength between the bit leg and the drill bit body is enhanced, the connection reliability between the bit leg and the drill bit body is guaranteed, and cracking of the bit leg and the drill bit body and falling of the bit leg into a well are avoided.

Description

technical field [0001] The invention relates to the technical field of oil drilling tools, in particular to a hybrid drill bit. Background technique [0002] At present, due to the compound cutting structure of fixed blades and rolling cones, hybrid drill bits have the advantages of adapting to various formations, high ROP, and more footage; hybrid drill bits are widely used in the field of oil drilling. [0003] In the related art, the hybrid drill bit generally has a bit body, and a rolling cone is installed through the palm at the lower end of the drill body. Since the core of the drill bit needs to be provided with an inner flow channel for drilling fluid to pass through, the rolling cone and the palm are generally arranged on the bottom of the drill bit. At the outer edge, there are usually problems of insufficient connection strength and low connection reliability between the tooth palm and the drill bit body. In order to pursue drilling benefits, drilling companies us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/18E21B10/16
CPCE21B10/18E21B10/16
Inventor 樊孝兵许友斌杨霞周悦辉杨美周韩飞飞刘振涛
Owner KINGDREAM PLC CO
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