SU632822A1

SU632822A1 - Rolling cutter bit reamer

Info

Publication number: SU632822A1
Application number: SU742038052A
Authority: SU
Inventors: Вячеслав Николаевич Савельев
Original assignee: Savelev Vyacheslav N
Priority date: 1974-06-26
Filing date: 1974-06-26
Publication date: 1978-11-15

Description

1one

Изобретение относитс к буровому породоразрушающему инструменту.The invention relates to a rock drilling tool.

Известен и;арошечныи расширитель, включающий цапфу, на которой с небольшими зазорами последовательно установлены втулки с шарошками 1. Втулки расширител соединены между собой с помощью промежуточных муфт путем двойного замкового соединени . Промывочный агент нодаетс на забой скважины через зазоры между втулка.ми и валом.Known and; aroshechny extender, including a pin, on which with small gaps are installed the sleeves with cones 1. The extender sleeves are interconnected by means of intermediate sleeves by means of a double locking connection. The flushing agent is downhole through the gaps between the sleeve and the shaft.

Данна конструкци может быть использована только при значительных поперечных размерах расширител , которые могут обеспечить достаточную прочность цапфы при установке на ней втулок с зазорами.This design can only be used with significant transverse dimensions of the reamer, which can ensure sufficient durability of the trunnion when installing sleeves with gaps on it.

Наиболее близким по технической сущности и достигаемому результату вл етс шарошечный расширитель, содержащий полую цапфу, на которой с помощью нескольких пар эксцентричных полувтулок, часть из которых сопр гаетс с цапфой по некруглым поверхност м, смонтированы шарошки 2.The closest in technical essence and the achieved result is a roller cone, containing a hollow pin, on which, with the help of several pairs of eccentric half-sleeves, some of which mate with the pin on non-circular surfaces, the cones 2 are mounted.

В этом распшрителе цапфа ослаблена наличием нескольких некруглых поверхностей , а ее диаметр значительно меньше диаметров опор шарошек, что не позвол ет добитьс достаточных прочностных и эксплуатационных характеристик в услови х .малых поперечных размеров расширител .In this spreader, the trunnion is weakened by the presence of several non-circular surfaces, and its diameter is much smaller than the diameters of the cones of the cones, which makes it impossible to achieve sufficient strength and performance characteristics under conditions of small transverse dimensions of the expander.

Целью изобретени вл етс повышение прочности и надежности расширител в услови х его .малых поперечных размеров.The aim of the invention is to increase the strength and reliability of the expander in terms of its small transverse dimensions.

Это достигаетс те.м, что в каждой эксцентричной втулке на участке наименьшей толщины выполнена продольна прорезь, обеспечивающа частичное сопр жение шарошки с цапфой.This is achieved by the fact that in each eccentric bushing, a slit is made in the region of the smallest thickness, which partially mates the roller cutter with the trunnion.

На фиг. 1 изображен предлагаемый расширитель , продольный осевой разрез; на фиг. 2 - разрез А-А на фиг. 1; на фиг. 3 - эксцентрична втулка в аксонометрии.FIG. 1 shows the proposed extender, a longitudinal axial section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - eccentric sleeve in a perspective view.

Расширитель содержит полую цапфу 1, The dilator contains a hollow pin 1,

Claims

5 on which with the help of locking means (for example, pins), the sleeves 2 and the roller cones 3 are installed. The outer surface 4 of the bushings serves as a radial sliding support for the roller cutter and is made with eccentricity e with respect to its inner surface 5. On the smallest section of the sleeve, it is made longitudinally slot 6. Since the slot is located on the unloaded side of the radial bearing, this is not 3, it reduces its carrying capacity. To provide rigidity and limit the axial movement of the cone, one of the ends of the sleeve is provided with a closed catfish 7. The final assembly of the expander is performed by means of an adapter 8 connected to the housing by means of the pole and thread. The flushing agent is supplied to the bottom through the central axial channel 9 of the trunnion 1. In mounted, the roller cutter 3 mates with the radial support of the bushing 2 and partially with the trunnion I. Such a constructive implementation allows to increase the diameter of the trunnion and, consequently, increase the strength and reliability of the expander In general, which is especially important for small transverse dimensions of the expander. Claims A ball cone with a hollow pin mounted on it using locking means eccentric bushings and cones, characterized in that, in order to increase the strength and reliability of the expander in terms of its small transverse dimensions, in each sleeve on the site. the smallest thickness is a longitudinal slit, providing partial mating of the roller cutter with the trunnion. 1. USSR Author's Certificate No. 334726, cl. E 21 B 9/22, 1966.

2. The author's certificate of the USSR L 460367, cl. E 21 B 9/24, 1973.