SU1509505A1 - Apparatus for drilling wells - Google Patents

Abstract

The invention relates to a device for drilling wells. The goal is to increase drilling performance by ensuring the device is released in a dam condition in outburst formations. The device includes a logger 1 and a mandrel 3 with longitudinal through slots 4, in which sections 5-8 are installed in the form of plates. Sections 5-8 have cutters 2 and stops 9 with acute angles 10 in the plane of the sections that face the opposite direction of cutters 2. Each section 5-8 is connected to mandrel 3 via axis 11. In holes 12 and slots 4 of mandrel 3 damping elements are installed, in the grooves 4 - elastic seals. With a sudden ejection of coal, it has an exit from the bottom of the well through the holes between sections 5-8, which prevents the device from being clamped. The stops 9 provide for the destruction of the coal plug in the well. In the case of clamping the device it is released by performing shunting operations with feed back and forth. 3 il.

Description

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31509505

angles 10 in the plane of the sections that face the opposite direction of the incisors 2. Each section 5-8 is connected to the mandrel 3 by means of axis 11. In the holes 12 and the slots 4 of the mandrel 3, working elements are installed, in the slots 4 elastic seals. a sudden ejection of coal, it has an exit from the bottom of the well through the holes between sections 5-8, which eliminates the clamping of the device. The stops 9 provide for the destruction of the coal plug in the well. In case of clamping the device, it is released by performing forward-backward shunting operations. 3 il.

The invention relates to a mining business, namely to devices for drilling wells.

The purpose of the invention is to improve the drilling performance by ensuring the freeing of the device under conditions of blockage in outburst-hazardous formations.

c. FIG. 1 shows a device, a general view of FIG. 2. - the same, top view; in fig. 3 - node} in figure 1.

The device for drilling wells comprises a drill 1 with cutters 2, rigidly connected with a mandrel 3, having -through longitudinal grooves 4, which include flat sections for 5-8 sec. cutters 2 and stops 9, made on sections 5-8 with acute angles 10 in the plane of sections that face the opposite direction to installed cutters, the Coda section is connected to the mandrel by means of axes 11, perpendicular to the longitudinal axis of the mandrel, B The openings 12 of the sections and the grooves 4 of the mandrel 3 are fitted with damping elements, including springs 13, plungers 14 and adjusting screws 15. In the grooves 4 of the mandrel 3, elastic seals 16 are installed transversely between the walls of the grooves and the ends of the sections.

Device for drilling wells: works as follows. . When drilling wells in a uniform pattern on diametrically located cutters 2 flat sections 5-8, installed in one cutting plane, equal forces act that do not create distortions of sections relative to the plane of cutting, as a result of which the device keeps moving along the specified direction.

When a cutter 2 encounters with a strong inclusion in a heterogeneous array, a section (for example, 5) is affected by an effort

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The gate of section 5 is firmly turned on until it comes into contact with the wall of the well through stop 9, as a result of which the loads on the cutters 2 are leveled and the device does not receive lateral displacement. The release of the cutters 2 from uneven load returns section 5 to its original position.

Such stressing on the cutters 2 reduces the dynamic load of the operating organ in the downhole zone of the well in the form of its sharp jolts, and consequently, reduces the possibility of microvibration during drilling of formations with high gas-dynamic activity.

In case of a sudden ejection of coal, the latter through the holes between the molar blades of sections 5-8 has an outlet from the bottom of the well, which excludes the clamping of the device. In the case of clamping the device, it can be released by performing shunting operations with feed back and forth, since the ejected coal has an exit from the bottomhole zone through the spaces between section II 5-8, and the stops of 9 sections, made with an acute angle of 10, directed towards opposite to the established cutters 2, during shunting operations, ensure the destruction of the coal plug in the well,

Claims (1)

Formula Invention A device for drilling wells, containing a mandrel mounted on the mandrel of the intake and swiveling sections with stops on the periphery, the sides of which in longitudinal section form a vertex, incisors attached to sections on the opposite side of the stops, damping elements installed between section and mandrel, and compaction sections, characterized in that, in order to improve drilling performance by ensuring the release of the device in blockage conditions in outburst formations, the sections are made in the form of plates, frames E: Fie.2 The canal is made with through longitudinal grooves in which the plates are placed, and the stops in the longitudinal section from the top are made acute, with the damping elements and seals placed in the slots of the mandrel. .З