Drilling insert, roller cone bit and drilling insert machining method

A processing method and tooth inserting technology, which is applied to drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of low working efficiency and stress dispersion in hard strata, achieve good rock breaking effect and improve working efficiency
CN110145239AActive Publication Date: 2019-08-20CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF GEOSCIENCES (BEIJING)
Publication Date
2019-08-20

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Abstract

The invention discloses a drilling insert, a roller cone bit and a drilling insert machining method. The drilling insert comprises an insert tooth portion. The insert tooth portion comprises a drilling surface arranged at the top portion and chip removal inclined surfaces arranged on the side. The drilling surface is of a plane structure. Recessed tooth grooves are formed between the two adjacentchip removal inclined surfaces in the insert tooth portion. The top ends of the tooth grooves are connected with the drilling surface. According to the drilling insert, the roller cone bit and the drilling insert machining method, the tooth grooves are formed between the two adjacent chip removal inclined surfaces, the top ends of the tooth grooves are jointed with the drilling surface, that is, the drilling surface is provided with a notch structure, and the drilling surface is of a multi-tooth structure. The drilling surface and the tooth grooves meet the stress concentration at the joint corner positions, and the rock breaking force is large. The insert has better rock breaking effect under the larger driving force, so that the working efficiency in the hard formation is improved.
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Description

technical field

[0001] The invention relates to the field of technical drilling equipment, in particular to an insert for drilling. The present invention also relates to a roller cone bit comprising the above-mentioned drilling insert. The invention also relates to a method for processing an insert for drilling. Background technique

[0002] The roller cone bit is one of the important tools in oil drilling and geological drilling. The teeth on the toothed roller cone bit are cemented carbide teeth mounted on the outer cone of the cone to break the formation. During the rock-breaking process of engineering drilling, the teeth produce pressing, crushing, shearing and impacting effects on the rock. The roller cone bit is composed of more than 20 parts such as cutting structure, bearing structure, locking element, oil storage sealing device, nozzle device and so on. The cutting structure includes cones and teeth. The cone is a vertebral body with teeth on it. It is divided in...

Claims

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