A multi-cone drill bit

A roller cone bit and drill bit technology, which is applied in the direction of drill bit, drilling equipment, earthwork drilling, etc., can solve the problems of multiple dead angles, affect the drilling efficiency of the drill bit, and affect the extension of the drill body, so as to reduce the dead angle and improve the drilling efficiency. Effect

Active Publication Date: 2015-11-18
GUOQIANG CONSTR GRP
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  • Abstract
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Problems solved by technology

However, the applicant found in the actual practice process that the multi-cone drill bit designed by Fashang will have more dead angles when drilling, and these dead angles that are not cut by the cone cutting teeth will cause resistance to the drill body in the drill hole , which affects the extension of the drill body along the ground depth direction, thus affecting the drilling efficiency of the drill bit

Method used

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  • A multi-cone drill bit
  • A multi-cone drill bit
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Embodiment Construction

[0025] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0026] Such as figure 1 , figure 2 , image 3 As shown, the drill bit includes a drill body 1. One end of the drill body 1 has a circular mounting plate 2. At least one cone 4 is rotated on the area of ​​the circular mounting plate 2 close to its center line. The circular mounting plate 2 is far away from the At least two cones 4 are rotated on the area of ​​its own center line, and the distance between each cone 4 located away from the center line of the circular mounting plate 2 and the center line of the circular mounting plate 2 is completely unequal or partially not equal. As a preference, three cones 4 are rotated on the area of ​​the circular mounting plate 2 close to its own center line, and the three cones 4 a...

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Abstract

The invention provides a multi-roller drill and belongs to the technical field of machinery. The multi-roller drill solves the technical problem that the drilling efficiency of a multi-roller drill in the prior art is low. The multi-roller drill comprises a drill body. One end of the drill body is provided with a round installation plate. At least one roller is arranged on the zone, adjacent to the center line, of the round installation plate. The multi-roller drill is characterized in that the zone, away from the center line, of the round installation plate is provided with at least two rollers in a rotation mode, the distances between the rollers located on the zone away from the center line zone of the round installation plate and the center line of the round installation plate are totally unequal or partially unequal. The drilling efficiency of the multi-roller drill can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a multi-cone drill bit. Background technique [0002] The roller cone bit is a widely used drill bit, which has the functions of impacting, crushing and shearing the formation rock when it rotates. Therefore, the roller cone bit can adapt to various soft, medium and hard formations. Especially after the appearance of the jet roller cone bit and the long nozzle roller cone bit, the drilling speed of the roller cone bit has been greatly improved, which is a major reform in the history of the development of the roller cone bit. According to the tooth type, the roller cone bit can be divided into milling tooth roller cone bit and insert tooth roller cone bit; according to the number of roller cone bits, it can be divided into single roller cone bit, tri-cone drill bit and assembled multi-cone bit. [0003] Chinese patent CN1304720C discloses a high-strength anti-wear multi-cone drill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/16E21B10/18E21B10/08
Inventor 董荣贵宋银华吉剑峰杨亦贵王荣富
Owner GUOQIANG CONSTR GRP
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