SU791905A1

SU791905A1 - Drilling bit

Info

Publication number: SU791905A1
Application number: SU782630440A
Authority: SU
Inventors: Григорий Сергеевич Геворков; Авраам Моисеевич Зархин; Николай Иванович Козырев; Александр Николаевич Овчинников; Рафик Урумович Урумян; Арнольд Иванович Чудаков
Original assignee: Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники
Priority date: 1978-06-14
Filing date: 1978-06-14
Publication date: 1980-12-30

Description

(54) БУРОВОЕ ДОЛОТО(54) DRILLING BIT

1one

Изобретение относитс к области буровой техники, а именно-к породог разрушакхиим инструментам лЛ бурени глубоких скважин.The invention relates to the field of drilling equipment, namely, to the destruction of the destruction of tools for drilling deep wells.

Известны буровые долота, имеющие рабочую головку с породоразрушающими органами и системой каналов дл подвода и отвода промывочной жидкости 1 .Known drill bits having a working head with rock cutting bodies and a system of channels for supplying and discharging the washing liquid 1.

Недостатком зтих долот вл етс плоха очистка забо и разрушающих органов от шлама, а вследствие образовани шламовой подушки снижаетс механическа скорость проходки и происходит преждевременный Износ матричного материала с повреждением разрушающих элементов.The disadvantage of these bits is poor cleaning of the bottom and destructive organs from sludge, and due to the formation of a slurry pad, the mechanical penetration rate is reduced and premature wear of the matrix material occurs with damage to the destructive elements.

Наиболее близким к изобретению по технической сущности вл етс буровое долото, включающее корпус с промьшочными каналами, рабочую головку с центральной вогнутой поверхностью , сопр женной через переходную зону с выпуклой периферийной поверхностью, центральные и периферийные породоразрушакгше лезви 2 . The closest to the invention to the technical essence is a drill bit, which includes a body with industrial channels, a working head with a central concave surface, interfaced through a transition zone with a convex peripheral surface, central and peripheral rock destructions above the blade 2.

Недостатком указанного бурового долота вл етс то, что оно не обеспечивает достаточную очистку и охлаждение р дов разрушаклчих элементов , что ведет к образованию кольцевого износа торцовой части рабочей головки в минимально защищенной алмазами переходной зоне.The disadvantage of this drill bit is that it does not provide sufficient cleaning and cooling of the rows of destructive elements, which leads to the formation of ring wear of the end portion of the working head in the minimum transition zone protected by diamonds.

Целью изобретени вл етс повышение эффективности работы долота.The aim of the invention is to increase the efficiency of the bit.

Это достигаетс тем, что центральные породоразрушающие лезви размещены с перекрытием в окружном направлении периферийными лезви ми в области переходной зоны и образуют This is achieved by the fact that the central rock-cutting blades are placed with peripheral blades in the circumferential direction in the region of the transition zone and form

10 с забоем скважины две изолированные друг от друга группы полостей, причем часть промывочных каналов сообщаетс с центральной поверхностью долота через одну группу полостей, 10 downhole two groups of cavities isolated from each other, with some of the flushing channels communicating with the central surface of the bit through one group of cavities,

15 а друга часть промывочных каналов с периферийной поверхностью долота через вторую группу полостей.15 and the other part of the flushing channels with the peripheral surface of the bit through the second group of cavities.

На фиг.1 и 2 изображено буровое 20 долото дл вращательного бурени Figures 1 and 2 depict a drill bit 20 for rotary drilling.

роторным способом; на фиг.З - долото дл бурени забойным двигателем с высокой частотой вращени .rotary way; in FIG. 3, a chisel for drilling with a high speed downhole motor.

Claims

The drill bit includes the If 25 body if the working head 2c has a central concave conical surface, conjugated through a transition zone with a convex peripheral surface, equipped with interleaved central 3 and peripheral 4 rock-cutting blades that mutually intersect in the circumferential direction in the transition zone, where they are directly pulled out channels 5 for supplying washing liquid. Breeds of the blade form a group of channels B. And alternate with them a group of isolated channels 7. The first group of channels communicates with the central outlet channels 8 and 9, and the second group of channels - with grooves 10, executed on the side surfaces of the working head 2. According to the invention in the drill bit (fig. 3) for drilling with a downhole motor of rock formations erasing lei 11 in the peripheral part of the working head are inclined in the direction of rotation of the bit, and the pore destructive blades 12 in the central part of the working head are tilted us in the opposite direction. In the process of drilling, the flushing fluid coming from the pressure channels 5 into the middle zone of the bottom is fed together with the slurry from the strips formed by the channels b and the bottom of the well into the discharge channels 8 and through the channels 9 is thrown up into the scraper space upwards from the cavities formed by the channels 7, through the grooves 10 are brought into the flow to the wellhead. Mutual overlapping of the middle transitional zone of the working head with intermittent rock-cutting blades to the width of the transitional part ensures the durability of the dangerous area of the working bodies, and organizing separate individual washing of the rock-and-destructive organs by means of shortened paths significantly reduces the impact of abrasive damaged particles. the elements and the matrix material of the working head are destroyed, which contributes to a twofold increase in durability lot and elimination process for making an annular end face of the working head. The invention The drill bit, including a housing with purging channels, a working head with a central concave surface, interfaced through a transition zone with a convex peripheral surface, central and peripheral rock-destructed blades, so that, in order to increase the efficiency of the work, The central rock-cutting blades are placed with peripheral blades in the circumferential direction in the transition zone and in the bottom hole form two isolated from each other groups olostey, wherein the flushing channel portion communicates with the surface of the bit uentralnoy through rolostey one group and another part channels flushing - with the peripheral surface of the cavities through the second bit group. Sources of information taken into account in the examination 1. US patent number 2493178, cl. 175-329, 1946.

2. The patent of the USA 3768581, cl. 175-329, 1973.

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