A roller cone bit

A roller cone bit and roller cone technology are applied in drill bits, earth-moving drilling, drilling equipment and other directions, which can solve the problems of poor cutting effect and short service life, and achieve the effects of improving service life, improving efficiency and improving uniformity.
CN107939294BInactive Publication Date: 2019-04-09成都锐钻钻头制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
成都锐钻钻头制造有限公司
Publication Date
2019-04-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of drill bits and discloses a roller bit to solve the problem of short service life and poor cutting performance of the existing single-cone roller bits. The roller bit comprises a base; a roller cone is connected to the base; a mounting groove is installed on an external circumference of the roller cone; the mounting groove sleeves a mounting plate; the mounting plate is provided with multiple cutting teeth; a rotating direction of the mounting plate is vertical to the rotating direction of the roller cone; a roller cone end part away from the baseis provided with a protecting cover; a vertical gap is formed between the inner wall of the protecting cover and an external rim of the cutting teeth which is rotating to the place;; the roller coneis provided with a cooling liquid channel; the protecting cover is provided with a liquid outlet channel which is connected with the cooling channel therein; the liquid outlet channel is provided witha nozzle facing the cutting teeth; the cutting teeth on each mounting plate are spiral type; the spiral direction of the formation of each cutting tooth is from the root of the roller cone to the tipof the roller cone.
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Description

technical field

[0001] The invention belongs to the technical field of drill bits, in particular to a roller cone bit. Background technique

[0002] The roller cone bit is the most widely used type of drilling bit. When the roller cone bit is working, the cutting teeth alternately contact the bottom of the well, the rock-breaking torque is small, the contact area between the cutting teeth and the bottom of the well is small, the specific pressure is high, and it is easy to penetrate into the formation; the total length of the working blade is large, so the wear is relatively reduced. Roller cone bits can adapt to a variety of formations from soft to hard.

[0003] According to the number of cones, it can be divided into single-cone bits, three-cone bits and assembled multi-cone bits. According to the cutting material, it can be divided into steel teeth (milling teeth) and toothed gear bits.

[0004] As a tool for drilling rock formations, the roller cone bit has been wide...

Claims

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