Diamond impregnated bit cutting teeth and manufacturing method thereof
A technology of impregnated diamond and its manufacturing method, which is applied in the direction of drill bits, earthwork drilling, drilling equipment, etc., and can solve the problem of small cutting edge height, the specific gravity of drilling fluid, the impact on the service life and drilling efficiency of diamond impregnated drill bits, and the impact of diamond wear rate, etc. question
Active Publication Date: 2020-03-10
PETROCHINA CO LTD +1
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Problems solved by technology
However, when drilling in deep hard rock with bottom-hole dynamic drilling tools, due to the influence of factors such as the small cutting edge height of the diamond (cutting edge height <0.5mm), the high rotary speed of the drill bit, and the high specific gravity of the drilling fluid, the working lip surface of the impregnated diamond bit The cooling effect is still very severe
[0004] At the same time, since the diamond wear rate is seriously affected by its working temperature (the temperature rises from 300°C to 500°C, the wear rate of diamond increases by 3 times, and then wears faster), while the static bottomhole temperature of some deep wells and ultra-deep wells It can be as high as 200°C and above, which greatly affects the service life and drilling efficiency of impregnated diamond drill bits
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[0038] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0039] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening element...
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Abstract
The invention discloses an impregnated diamond bit cutting tooth and a manufacturing method thereof. The manufacturing method of the impregnated diamond bit cutting tooth comprises the following stepsof uniformly mixing at least two kinds of metal powder to prepare a metal carcass mixing material; uniformly mixing the metal carcass mixing material with solid lubricant powder to prepare a compoundcarcass mixing material; mixing and pelletizing the metal carcass mixing material with diamond particles to form diamond compound particles; mixing and pelletizing the diamond compound particles withthe compound carcass mixing material to form a cutting tooth particle material; loading a sintering mold with the cutting tooth particle material to be hot-pressed and sintered to obtain the impregnated diamond bit cutting tooth. By means of the impregnated diamond bit cutting tooth and the manufacturing method thereof, the friction coefficient between a diamond tool and a machined part can be lowered, then the generation of friction heat is reduced, and it is ensured that an impregnated diamond tool is in a good working environment.
Description
technical field [0001] The invention belongs to the technical field of petroleum and geological exploration, and in particular relates to a cutting tooth of an impregnated diamond drill bit and a manufacturing method thereof, which are mainly used for prolonging the service life and drilling efficiency of the impregnated diamond drill bit. Background technique [0002] The rock-breaking mechanism of the impregnated diamond bit is to continuously scratch and grind the bottom rock with many and small diamond particles on the bottom lip surface. With the gradual wear of the diamond in this layer and the continuous wear of the matrix, the new diamond To work naked again. During the drilling process, the high specific energy requirement of the impregnated diamond bit results in a large amount of frictional heat between the working lip of the bit and the rock contact interface, and its performance depends heavily on the cooling state of the drilling fluid on the working lip of the...
Claims
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IPC IPC(8): E21B10/46E21B10/43
CPCE21B10/43E21B10/46
Inventor 谭松成章文姣方小红李成龙段隆臣
Owner PETROCHINA CO LTD