Mixed drill bit

A technology of mixing drill bits and drill bits, which is applied in the direction of drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of low rock-breaking efficiency and achieve the effects of improving rock-breaking efficiency, high service life, improving wear resistance and stability

Pending Publication Date: 2022-04-15
KINGDREAM PLC CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a hybrid drill bit to solve the problem of low rock-breaking efficiency when the drill bit is used in elastic-plastic formations in the related art

Method used

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Embodiment Construction

[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0037] see figure 1 and figure 2 As shown, a hybrid drill bit provided by the embodiment of the present application includes a drill body 1, at least one fixed blade 2 and at least one tooth palm 3, and the fixed blade 2 and the tooth palm 3 are connected to the same part of the drill body 1. On the end, the fixed blade 2 is provided...

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Abstract

The invention relates to a mixed drill bit which comprises a drill bit body, at least one fixed blade and at least one bit leg. The fixed cutter wing is connected to the end part of the drill bit body, and fixed cutting teeth are arranged on the fixed cutter wing; the bit leg is connected to the end of the drill bit body, a cone is installed on the bit leg, and a tooth row is arranged on the cone. Wherein the tooth row on one tooth wheel comprises steel teeth, and the tooth row on the other tooth wheel comprises inserted teeth. According to the mixed drill bit, the steel teeth and the inserted teeth are arranged on the mixed drill bit, when the steel teeth make contact with the well bottom, due to the protruding pointed structures of the steel teeth, the steel teeth can be effectively wedged into a hard plastic stratum and play a role in pre-crushing a dense stratum, and the inserted teeth are pressed into the bottom layer, play a role in pre-crushing the stratum and further have the high abrasion resistance and the limiting function; abrasion resistance and stability of the mixed drill bit are improved, pointed structures of the fixed cutting teeth are used for scraping, and the rock breaking efficiency of the mixed drill bit can be effectively improved.

Description

technical field [0001] The present application relates to the technical field of oil and natural gas drilling, in particular to a hybrid drill bit. Background technique [0002] In the exploration and development of oil and natural gas resources in recent years, with the continuous expansion of exploration blocks, denser formations are often encountered, such as mudstone, gypsum rock and tuff with hard plastic characteristics. The stratum is usually extremely high during drilling, as high as 100-200min / m, and the drill bit is very fresh after being pulled out. It can be seen that when encountering such a stratum with relatively large elastoplasticity, the conventional circular composite sheet will It is pressed into the formation, but the formation is elastically deformed, and it is difficult for the composite sheet to penetrate into the formation effectively, resulting in the inability to form an effective scraping effect. It can be an important way and method to shorten t...

Claims

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Application Information

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IPC IPC(8): E21B10/16E21B10/14E21B10/52
CPCE21B10/16E21B10/14E21B10/52
Inventor 江诗贵杨东泽刘晓波吴革橙郑兵李宗昌叶中郎熊婷
Owner KINGDREAM PLC CO
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