A kind of cemented carbide tooth and tooth fixing method
A cemented carbide tooth and tooth fixing technology, which is applied in earth-moving drilling, drill bits, drilling equipment, etc., can solve the problems of broken teeth, dropped teeth and dropped blocks, etc., to increase the brazing contact area, increase the strength of fixed teeth, The effect of reducing the risk of falling to the bottom of the well
Active Publication Date: 2021-12-07
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] In order to overcome the shortcomings of the existing tooth-fixing process, the present invention provides a cemented carbide tooth and a tooth-fixing method, which can effectively avoid the early occurrence of broken teeth, missing teeth, and dropped blocks of the drill due to improper traditional tooth-fixing methods. Unstable situation occurs
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[0028] The following non-limiting examples illustrate the invention.
[0029] A cemented carbide tooth 1, characterized in that: a stepped surface 12 is provided on the cemented carbide tooth, at least three evenly distributed through grooves 13 are provided on the circumferential surface of the tooth, and at least one groove 13 is provided on the bottom surface of the cemented carbide tooth Convex ribs 14, and the value range of the diameter of the cemented carbide tooth step surface is: 0.01mm≤d1-d2≤10mm, where d2 is the diameter of the small step surface, and d1 is the diameter of the large step surface, such as figure 1 , 2 , 3, 4 shown.
[0030] As a preference, the value range of the diameter d1 of the cemented carbide tooth and the tooth hole D1 is: 0.01mm≤d1-D1≤0.2mm, such as image 3 , 5 shown.
[0031] Preferably, the cemented carbide teeth are conical teeth, wedge teeth, spherical teeth, bullet teeth, PDC teeth, and ax-shaped teeth.
[0032] Preferably, at leas...
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Abstract
A cemented carbide tooth and a tooth fixing method, which belong to the field of technical equipment such as oil and gas drilling engineering, mining engineering, building foundation engineering construction, geological drilling, tunnel engineering, hydrology and trenchless, and specifically relate to a cemented carbide tooth And the fixed tooth method, a step surface is set on the hard alloy tooth, at least three evenly distributed through grooves are set on the circumferential surface of the tooth, at least one convex rib is set on the bottom surface of the hard alloy tooth, and the hard alloy tooth step The value range of the surface diameter is: 0.01mm≤d1‑d2≤10mm, where d2 is the diameter of the small surface of the step, and d1 is the diameter of the large surface of the step. First rely on the interference to press into the tooth hole, and then fill the gap between the tooth space and the tooth with brazing material, fix the carbide tooth by various methods, increase the brazing contact area of the carbide tooth, and increase the solidity of the tooth Strength, reducing the risk of carbide teeth falling to the bottom of the well.
Description
technical field [0001] The invention belongs to the technical equipment fields of petroleum and natural gas drilling engineering, mining engineering, building foundation engineering construction, geological drilling, tunnel engineering, hydrology and non-excavation, and specifically relates to a cemented carbide tooth and a tooth fixing method. Background technique [0002] The drill bit is a rock-breaking tool used in drilling engineering to break rock and form a wellbore. The roller cone bit is a rock-breaking tool commonly used in drilling engineering. The tri-cone bit mainly breaks rocks in the form of impact crushing, that is, the teeth break rocks by impacting, squeezing and scraping with a small amount of slippage on the rocks. The tri-cone bits currently used in drilling engineering include steel tooth drill bits (also known as milling tooth drill bits) and carbide tooth drill bits (also known as insert tooth drill bits). The milling gear cone bit is to directly mi...
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IPC IPC(8): E21B10/16E21B10/36B23P15/00
CPCE21B10/16E21B10/36B23P15/00
Inventor 牛世伟黄奎林杨迎新包泽军张春亮蒋龙刘洋洲
Owner SOUTHWEST PETROLEUM UNIV