SU874955A1

SU874955A1 - Drilling bit

Info

Publication number: SU874955A1
Application number: SU792775315A
Authority: SU
Inventors: Иван Федорович Вовчановский; Владимир Васильевич Квач; Григорий Иванович Матвеев
Original assignee: Ордена Трудового Красного Знамени Институт Сверхтвердых Материалов Ан Усср
Priority date: 1979-06-05
Filing date: 1979-06-05
Publication date: 1981-10-23

Description

(54) БУРОВОЕ ДОЛОТО(54) DRILLING BIT

1one

Изобретение относитс к нородоразрушающему инструменту, а именно к буро ,вым долотам с алмазным вооружением.The invention relates to a rock-breaking tool, namely, brown, diamond-tipped drill bits.

Известны буровые алмазные долота, содержащие корпус с центральным каналом и рабочую головку, разделенную промывочными пазами на секторы, армированные породоразрушающими и калибрующими элементами |1.Known diamond drill bits, comprising a housing with a central channel and a working head, divided by flushing grooves into sectors reinforced by rock-breaking and calibrating elements | 1.

Недостатком известных долот вл етс низка механическа скорость бурени и проходка, что св зано с некачественной очисткой забо от шлама, особенно после износа породоразрушающйх элементов Опережающих секторов, и плохой стабилизацией в процессе бурени .A disadvantage of the known bits is the low mechanical drilling rate and penetration, which is associated with poor cleaning of the sludge, especially after wear of the rock-breaking elements of the Lead sectors, and poor stabilization during the drilling process.

Наиболее близким по технической сущности и достигаемому результату к изобретению вл етс буровое долото, включающее корпус с центральным каналом и рабочую головку со стабилизирующими лопаст ми, армированными калибрующими и породоразрушающими элементами, и образованными лопаст ми промывочными пазами, соединенными с центральным каналом |2.The closest in technical essence and the achieved result to the invention is a drill bit, comprising a body with a central channel and a working head with stabilizing blades reinforced with calibrating and rock-breaking elements, and the washing blades formed by the blades connected to the central channel | 2.

Недостатком данного долота вл етс низка стойкость рабочих элементов, св занна с их неравномерным охлаждением в процессе бурени .The disadvantage of this bit is the low durability of the working elements associated with their uneven cooling during the drilling process.

Цель изобретени - повышение стойкости рабочей головки путем лучшего охлаждени калибрующих и породоразрущающих элементов.The purpose of the invention is to increase the durability of the working head by better cooling the calibrating and rock-breaking elements.

Эта достигаетс тем, что рабоча головка оснащена дополнительными поро-. доразрушающими и калибрующими элементами , закрепленными в промывочных пазах, при этом высота выступающей части дополнительных калибрующих и породоразрушаю10 щих элементов соответствует глубине пазов.This is achieved by the fact that the working head is equipped with additional pores. Additional destructive and calibrating elements fixed in the washing slots, while the height of the protruding part of the additional calibrating and rock destructing elements corresponds to the depth of the grooves.

На фиг. 1 изображено долото, вид со стороны рабочего торца; на фиг. 2 - сечение А-А на фиг. I; на фиг. 3 -сечение Б-Б на фиг.1. на фиг. 4 -схема армировки центральной части долота; на фиг. 5 -схема FIG. 1 shows a chisel, view from the side of the working end; in fig. 2 is a section A-A in FIG. I; in fig. 3 is a cross-section BB in FIG. in fig. 4 - scheme of reinforcement of the central part of the bit; in fig. 5 -circuit

IS размещени калибрующихс элементов.IS placement of calibrating elements.

Буровое долото содержит стальной кор пус 1 и рабочую головку 2 со стабилизирующими лопаст ми 3, армированными породОразрушающими и калибрующими элементами-4 , например из славутича. Лопасти 2 The drill bit contains a steel casing 1 and a working head 2 with stabilizing blades 3 reinforced by rock, Destructive and calibrating elements-4, for example, from slavutych. Blades 2

Claims

20 each of the washing slots 5, in which additional rock-breaking and calibrating elements 6 and 7 are fixed, all of the protruding part of which are above the base of the washing slots 5 corresponds to the depth in the groove. In the central part of the working head 2, where the rock is destroyed mainly due to axial load at low peripheral speeds, rock cutting elements 4 can be located ahead of the blades 3 above the end surface. The flushing lines 5 are connected to the central channel 8 of the housing 1, moreover, only part of the washing grooves 5 are reinforced with additional calibrating elements-7. The washing liquid p к k; blunt to the end of the working head 2 from the central channel 8 through the inlet part 9 of the grooves 5. The bit worked as follows. /. The working elements of the lopTEY 3 and the flushing grooves 5, respectively, 4, 6 and 7, depending on the type of rock, are destroyed by its cutting or abrasion. The washing liquid coming under the end of the working head 2 intensively cools the elements 4, 6 and 7 and removes the drilled cuttings. At the same time, the stabilizing blades 3 not only spread the washing liquid through the grooves 5, but also reduce the dynamic loads on the rock-breaking 6 and calibrating 7 elements, which allows using different layouts of elements 6 and 7. During drilling, the elements 6 and 7 are constantly TC in the flow of washing liquid, regardless of their wear height. Due to this, the temperature in the zone of contact of elements 6 and 7 is lower in the region with known bits, and the effect of the heat sink increases as the elements 6 and 7 wear out in height. This is due to the 2 J Fig. 1 reduction in the cross section of the washing slots, which leads to an increase in the rate of passage of the washing liquid and thus to an increase in the intensity of the heat sink. The application of the proposed bit allows an increase in the gasket due to the complete use of the working head for calibrating and rock-breaking elements, as well as the durability of the latter by better cooling them with the washing liquid. Claim drill bit, comprising a housing with a central channel and a working head with stabilizing blades, reinforced with calibrating and rock-breaking elements, and flushing grooves formed by blades, connected to a central channel, characterized in that, in order to increase the stability of the working head by cooling the calibrator, it expands. elements, the working head is equipped with additional rock-breaking and calibrating elements fixed in the flushing grooves. 2. Chisel according to claim. I, characterized in that the height of the protruding part of the additional calibrating and rock-breaking elements corresponds to the depth of the grooves. Sources of information taken into account in the examination 1. US patent number 2988088, cl. 175-229, published. 1961.

2. US patent number 3709308, cl. 175-329, published. 1973 (prototype). FIG. 2

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