SU585269A1

SU585269A1 - Earth-drilling tool

Info

Publication number: SU585269A1
Application number: SU752181605A
Authority: SU
Inventors: Вадим Амирджанович Керимов; Ягшимурат Агамурадович Ходжакулиев; Юрий Михайлович Носовский
Original assignee: Туркменский Научно-Исследовательский Геологоразведочный Институт
Priority date: 1975-10-16
Filing date: 1975-10-16
Publication date: 1977-12-25

Description

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Изобретение относитс к горной промышленности , „а именно к буровому инструменту , позвол ющему производить в процессе бурени расширение скважин.The invention relates to the mining industry, namely to a drilling tool, which allows the expansion of wells in the drilling process.

Известен инструмент дл расширени скважин при обратном вращении, включающий корпус с направл ющими, расширительные лапы с кулачками и шарнирнорычажное устройство дл привода в действие расширительных лап 1. A well-known tool for expanding the wells during reverse rotation, includes a housing with guides, expansion legs with cams and a toggle device for driving the expansion legs 1.

Недостатком этого инструмента вл етс мала надежность шарнирно-рычажного устройства. Объ сн етс это тем, что шарнирно-рычажна система, обеспечивающа перевод расширительных лап на больший диаметр, по своей прочности не отвечает услови м работы инструмента .The disadvantage of this tool is the low reliability of the hinge-lever device. This is explained by the fact that the hinged-lever system, which ensures the transfer of the expansion legs to a larger diameter, does not meet the conditions of operation of the tool for its strength.

Наиболее близким к изобретению по своей технической сущности и достигаемому эффекту вл етс буровой инструмент , включающий долото-забурник,, эксцентрично располЪженные направл ющие и подвижно соединенные с ними при помощи опор расширительные лапы 2. The closest to the invention in its technical essence and the effect achieved is a drilling tool, including a drill bit, an eccentrically arranged guide and movable expansion legs 2 movably connected to them with the help of supports.

В таком инструменте устройство дл перевода расширительных лап на ббль ший диаметр более надежно благодар использованию эксцентрично расположенных направл ющих. Однако и этот In such an instrument, a device for converting expansion paws to a larger diameter is more reliable due to the use of eccentrically arranged guides. However, this

инструмент имеет невысокую производительность бурени . Это объ сн етс тем, что бурение основного ствола скважины и его расширенного участка осуществл етс при противоположных направлени х вращени инструмента, в результате чего породоразрушающие элементы не могут быть установлены на оптимальный угол, а это повышает сопротивление породы резанию и снижает производительность бурени .the tool has a low drilling performance. This is due to the fact that the drilling of the main borehole and its extended section is carried out in opposite directions of rotation of the tool, as a result of which the rock-breaking elements cannot be installed at the optimum angle, which increases the resistance of the rock to cutting and reduces the drilling productivity.

Целью изобретени вл етс повышение производительности бурени .The aim of the invention is to improve the productivity of drilling.

Это достигаетс тем, что направл ющие выполнены в виде колец с прорез ми в местах пересечени и имеют фиксирующие устройства, а опоры рас1иирительных лап снабжены кольцевыми част ми, имеющими возможность перемещени в прорез х направл ющих, и диаметрально расположенными относительно соответствующих лап упорами дл взаимодействи с фиксаторами противоположных направл ющих.This is achieved by the fact that the guides are made in the form of rings with slits at the intersection points and have fixing devices, and the supports of the extension paws are provided with ring parts that have the ability to move into the slits of the guides, and diametrically arranged relative to the corresponding paws to interact with clamps of opposite guides.

Claims

FIG. 1 isobrigiken drilling tool, general view; in fig. 2 is the same top view (with the working diameter of the tool), in FIG. 3 is the same, section A-A in FIG. 1 (with the largest diameter of the tool); The drilling tool includes a drill bit 1, eccentrically distributed guides in the form of rings 2 with slots 3 at the intersection points, expansion legs 4 movably connected to the guides 2 with the help of supports 5 fitted with annular parts 6, which can move in the cutout of the guides. The guides have devices 7 with spring-loaded stops for fixing the expansion legs, and the annular parts of the supports are diametrically. there are stops 8 relative to their respective legs. The drilling tool works as follows. Rotate to the right to drill the main hole of small diameter. At the site of expansion, the reverse (left) rotation is included. Due to this, the eccentric located guides move the expansion legs from the borehole axis to a larger diameter under the action of resistance to rotation. In this case, the stops 8 of the legs of the expansion legs pass the spring-loaded stops of the locking devices 7. After the tool rotates one or two turns in the left direction, the right rotation is turned. When rotated in the right direction, the locking devices 7 pass through the stops 8 to the rotation of the expansion legs, which drilling large diameter wells. After the storm, the left rotation is turned on again to the specified depth, the expansion legs are retracted to a smaller diameter and the tool is raised. The use of the proposed drilling tool allows to increase the productivity of drilling in comparison with the known 1.5-2 times. Claims of the invention A drilling tool including up to a lotto-indent, eccentrically arranged guides and movably connected legs connected to them by means of supports, characterized in that, in order to increase drilling performance, the guides are made in the form of rings with slits at the intersection points and are equipped with locking devices, and the legs of the expansion legs are provided with annular parts having the ability to move in the slots of the guides, and diametrically located relative to the corresponding legs stops for engagement with retainers of opposite guides. Sources of information taken into account in the examination: 1. German patent 1184300, cl. 5a 9/26, 1965.

2. USSR author's certificate number 422846, cl. 21 On 17/00, 1972.

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