Fixed cutting-tooth drilling bit

A technology of cutting teeth and drill bits, which is applied in construction and other fields, can solve problems such as difficult to reach and high working life, and achieve the effects of increasing exposure height, improving service life, and improving rock breaking efficiency
CN102364032BActive Publication Date: 2014-03-26SOUTHWEST PETROLEUM UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHWEST PETROLEUM UNIV
Publication Date
2014-03-26

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Abstract

The invention discloses a fixed cutting-tooth drilling bit and belongs to the field of rock-blasting tools for drilling equipment for oil and gas, mine engineering, building basic engineering construction, geology, hydrology and the like. The fixed cutting-tooth drilling bit comprises a drilling bit body and cutting teeth, wherein the cutting teeth are formed by combining base teeth and overlapped teeth; the base teeth are fixed on the drilling bit body; grooves which are matched with the overlapped teeth in shape are formed on the base teeth; the base teeth are partially or totally exposed out of a crown surface of the drilling bit; the overlapped teeth are fixed outwards in the grooves of the base teeth relative to the drilling bit body; and the total height of an overlapped teeth structure which is formed by the overlapped teeth and the base teeth is greater than the theoretical height of the base teeth. By adoption of the fixed cutting-tooth drilling bit, the stratum penetration capacity of a polycrystalline diamond compact (PDC) drilling bit can be improved, and the service life of the drilling bit can be prolonged.
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Description

technical field

[0001] The invention belongs to the field of rock-breaking tools used for drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, and hydrology. Background technique

[0002] The drill bit is a rock-breaking tool used in drilling engineering to break rock and form a wellbore. Existing drill bits are mainly divided into two categories: non-fixed cutter drills and fixed cutter drills (or called non-fixed cutting structure drills and fixed cutting structure drills). The so-called non-fixed cutting tooth drill bit refers to a drill bit with relative movement between the teeth or cutting teeth and the drill bit body in the working state. If the cutting teeth on the drill bit are always consolidated with the bit body and there is no relative movement between each other, this type of drill bit is called a fixed cutter bit.

[0003] The typical representative of the non-fixed cutter bit is the...

Claims

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