SU832023A1

SU832023A1 - Core bit

Info

Publication number: SU832023A1
Application number: SU772502261A
Authority: SU
Inventors: Юрий Досифеевич Буторов; Леонид Яковлевич Скрябин; Владимир Васильевич Ду; Юрий Яковлевич Мужев
Priority date: 1977-06-20
Filing date: 1977-06-20
Publication date: 1981-05-23

Description

Изобретение относится к горному делу, а именно к буровому инструменту для бурения шпуров и скважин. .The invention relates to mining, and in particular to a drilling tool for drilling holes and wells. .

Известна буровая коронка, в которой лезвия рабочих органов расположены так, что проекции этих лезвий на плоскость перпендикулярную оси вращения коронки, совпадают с хордами окружности, образуя при этом с диаметром окружности угол с вершиной, находящейся на окружности fl] .A drill bit is known in which the blades of the working bodies are arranged so that the projections of these blades on a plane perpendicular to the axis of rotation of the crown coincide with the chords of a circle, forming an angle with a circle diameter with a vertex located on a circle fl].

Известна также буровая коронка включающая корпус, рабочие органы, проекции лезвий которых, лежа^йе в плоскости,перпендикулярной оси враще- 15 ния коронки, расположены так, что хотя бы одна из них совпадает с хордой окружности, имеющей диаметр коронки, а рабочие органы имеют на периферийной части коронки как минимум две обнаженные поверхности, которые пересекаются плоскостью, проходящей через ось коронки Г²].Also known is a drill bit including a housing, working bodies, the projections of the blades of which, lying in a plane perpendicular to the axis of rotation of the crown, are located so that at least one of them coincides with a chord of a circle having a diameter of the crown, and the working bodies have on the peripheral part of the crown, at least two exposed surfaces that intersect with a plane passing through the axis of the crown G ² ].

Недостатком известных коронок яв- ляется низкая скорость бурения и *5 низкая проходка на один период стойкости .A disadvantage of the known crowns is the low drilling speed and * 5 low penetration for one life period.

Цель изобретения - повыаение производительности труда за счет увеличения скорости бурения и стойкости. 30The purpose of the invention is to increase labor productivity by increasing drilling speed and durability. thirty

Поставленная цель достигается тем, что коронка имеет как минимум один рабочий орган, расположенный диаметрально, длина проекции лезвия которого на плоскость)перпендикулярную оси вращения коронки определяется соотношением с _г где t - длина проекции лезвия, мм,’ β, - диаметр коронки, мм;This goal is achieved in that the crown has at least one working body located diametrically, the length of the projection of the blade of which on the plane) perpendicular to the axis of rotation of the crown is determined by the ratio with _g where t is the length of the projection of the blade, mm, 'β, is the diameter of the crown, mm;

0_а - диаметр окружности, касательной к которой является проекция лезвия, расположенного по хорде, максимально приближенной к центру коронки, мм.0 _a is the diameter of the circle tangent to which is the projection of the blade located along the chord, as close as possible to the center of the crown, mm.

. На фиг. 1 представлена буровая коронка, общий вид; на фиг. 2 и фиг.Звозможные схемы расположения лезвий рабочих органов буровой коронки.. In FIG. 1 shows a drill bit, general view; in FIG. 2 and Fig. The possible arrangement of the blades of the working bodies of the drill bit.

Буровая коронка состоит из корпуса 1 , в котором размещены рабочие органы 2 с лезвиями 3. Проекции лезвий на плоскость,перпендикулярную оси вращения коронки (фиг.2 и 3), расположены таким образом, что хотя бы одна, из них 4 совпадает с хордой окружности, имеющей диаметр коронкиThe drill bit consists of a housing 1, in which the working bodies 2 with blades 3 are placed. The projections of the blades on a plane perpendicular to the axis of rotation of the crown (FIGS. 2 and 3) are arranged so that at least one of them 4 coincides with the chord of a circle having a crown diameter

I •832023 . Рабочие органы имеют на периферийной части коронки как минимум две .обнаженные поверхности 5, которые пересекаются плоскостью, проходящей через ось коронки. Коронка может иметь один (фиг.З) или два (фиг.2) » рабочих органа, расположенных диаметрально, При этом длина проекции лезвия каяадого из этих рабочих органов С определяется соотношением где^ F - длина проекции лезвия, мм;I • 832023. The working bodies have at least two exposed surfaces 5 on the peripheral part of the crown, which intersect with a plane passing through the axis of the crown. The crown may have one (Fig. 3) or two (Fig. 2) "working bodies located diametrically. The length of the projection of the blade of one of these working bodies C is determined by the ratio where ^ F is the length of the projection of the blade, mm;

Dj- диаметр коронки, мм;Dj is the diameter of the crown, mm;

0^ - диаметр окружности, касательной к которой является про- 15 екция лезвия, распложенного по хорде, максимально приближенной к центру коронки (в данном случае 4), мм.0 ^ is the diameter of the circle tangent to which is the projection of the blade located along the chord as close as possible to the center of the crown (in this case 4), mm.

Экспериментально полученные данные'20 о стойкостных параметрах данной буровой коронки, позволяют сделать вывод о повышении скорости бурения в 1,52 раза, стойкости бурового инструмента в 3-6 раза в сравнении с изве- 25 стными конструкциями буровых коронок.The experimentally obtained data'20 on the resistance parameters of this drill bit allow us to conclude that the drilling speed is increased by 1.52 times and the tool life by 3-6 times in comparison with the well-known designs of drill bits.

Claims

FIELD OF THE INVENTION The invention relates to mining, namely a drilling tool for drilling holes and boreholes. . The boring crown is known, in which the blades of the working bodies are arranged so that the projections of these blades onto the plane perpendicular to the axis of rotation of the crown coincide with the chord of the circle, forming with the diameter of the circle an angle with the apex located on circle i. The crown of the enclosing body is also known, the working bodies, the projections of the blades of which lie flat in the plane perpendicular to the axis of the doctor or the crown, are arranged so that at least one of them coincides with the chord of a circle having the diameter of the crown the crowns are at least two exposed surfaces that intersect with a plane passing through the axis of the Gz crown. A disadvantage of the known crowns is a low drilling rate and a low penetration rate for one durability period. The purpose of the invention is to increase labor productivity by increasing the speed of drilling and durability. This goal is achieved by the fact that the crown has at least one working body located diametrically, the length of the projection of the blade on which is perpendicular to the axis of the crown is determined by the ratio r. where t is the length of the blade projection, mm, D, is the diameter of the crown, mm; Od is the diameter of the circle, the tangent to which is the projection of the blade located along the chord, as close as possible to the center of the crown, mm. . FIG. 1 shows a drill crown, general view; in fig. 2 and Fig. Possible schemes for the arrangement of the blades of the working bodies of the drill bit. The drill crown consists of a housing 1 in which the working bodies 2 with blades 3 are placed. The projections of the blades onto a plane perpendicular to the axis of rotation of the crown (Figures 2 and 3) are arranged in such a way that at least one, 4 of them coincide with chord of a circle having a crown diameter of 0 l. The working bodies have at least two on the peripheral part of the crown. exposed surfaces 5, which intersect a plane passing through the crown axis. The crown can have one (fig. 3) or two fig. 2) working bodies located diametrically. The length of the blade projection of each working body C is determined by the ratio where t is the length of the blade projection, mm; Di is the diameter of the crown, mm; Q is the diameter of the circle tangent to which is the projection of the blade located along the chord, as close as possible to the center of the crown (in this case, 4), mm. Experimentally obtained data of 6 s of the fracture parameters of this bit of a crown, allow to conclude that the drilling speed is increased by 1.52 times, the durability of the drilling tool is 3-6 times in comparison with the known structures of the drill crown. Formula of the Invention Drill bit, including the body , working bodies, the projections of the blade of which lie in the plane of the perpendicular axis of rotation of the crown. are arranged so that at least one of them coincides with the chord of a circle having a crown diameter, and the working bodies have on the peripheral part of the crown. As at least two exposed surfaces that intersect the plane of the crown passing through the axis, , in order to increase labor productivity by increasing the drilling speed and durability, the crown has at least one working body disposed diametrically, the length of which the blades are projected onto a plane perpendicular to the axis of rotation of the crown, is determined by relation where - the length of the blade projection, .mm; D - crown diameter meter, mm / D ,, - diameter of a circle, the tangent to which is the projection of the blade located along the chord as close as possible to the center of the crown, mm. . Information sources, . taken into account during the examination 1. German Patent 917421, cl. 5 in, 13/00, published. 1954.

2. Ostroushko I.A. Downhole processes and tools for drilling rocks. M., Gosgortehizdat, 1962, p. 74, fig. 48g ..