SU1564321A1 - Borehole reamer - Google Patents

Abstract

The invention relates to mining, specifically to devices for expanding an advanced well in rocks of various strengths, including oblique deposits. The goal is to increase work efficiency due to uniform loading of plows. The device includes a pulley head 1, a die wedge 2, a telescopic body 3, planes 4, primary 5 and an additional 6 articulated parallelograms, a drill string 7 and a planer self-setting mechanism. The housing 3 is placed on the column 7 with the possibility of axial movement and consists of the upper and lower sections (C) 8 and 9. At the same time, the C 8 is connected with the head 1 with the possibility of rotation and longitudinal slots (P) 11 are made in it. The wedge 2 is placed in the head 1 with the possibility of interaction with C 9. In the struts 4 there are inclined P 12 and 13 and vertical P 14 communicated with each other. The upper hinges (W) 17 of the parallelogram 5 are located at C 8, the lower W 18 - at C 9, and the lateral W 19 - at P 12 or 14. The upper W 20 of parallelogram 6 are located at C 8, the lower W 21 - at P 11 and C 9, and side W 22 - in P 13 or 14. The self-installation mechanism includes asterisks 23 and 24 on C 8 and W 22, covered by chains 25. In the suspended position, parallelograms 5 and 6 and planes 4 are folded. When the device is lifted, the parallelograms 5 and 6 unfold and strugs destroy the walls of the well. 4 il.

Description

The invention relates to mining, and specifically to a device for expanding an advanced well in rocks of various strengths, including obliquely overlying.

The circuit of the invention is an increase in operating efficiency due to the uniform loading of plows.

Figure 1 shows the device, a general view | 2 shows the lower part of the device, a general view; on fig.Z - section aa in figure 1; figure 4 - the upper part of the device, the cut.

The device for expanding the wells includes a pulley head 1, a ram wedge 2, a telescopic body 3, planes 4, a main 5 and an additional 6 articulated parallelograms, a drill string 7, for example, a pulpo lift, on which case 3 is axially displaced. , plow self-propelling mechanism, upper and lower cable-block mechanisms.

Telescopic body 3 consists of the upper 8 and lower 9 sections. The upper end of section 8 is located in the pulley head 1 rotatably on the bearings 10. The upper end of section 9 is missed inside section 8 and placed in the pulley head 1 with the possibility of axial movement and fixing it by means of wedges 2. In the upper section 8, longitudinal slots 1 1.

The struts have lower 12 and upper 13 inclined slots, as well as vertical slots 14 communicating with inclined slots 12 or 13. On the lateral surfaces of the struts 4, incisors 15 are fixed. Shock absorbers 16 are attached to the lower part of section 8. Upper hinges 17 of parallelogram 5 are located on section 8, lower hinges 18 on section 9, and side hinges, namely their connections 19, in inclined 12 or vertical 14 slits of plows. Upper hinges 20

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JQ 5 is a parallelogram 6 located on section 8, lower hinges 21 in slots x 11 on section 9, and side hinges (their connections) 22 in slots x 13 or 14 ply 4. Each parallelogram consists of four tons g (not indicated ). The self-installation mechanism of the plows is made of sprockets 23 placed on the upper section 8, sprockets 24 on connections x 22, and chains 25 spanning these asterisks. The ends of the chains are fastened to the struts 4. The upper cable-blocking mechanism (Fig. 4) consists of levers 26 mounted on racks 27 attached to the upper end of section 8, of t g 28 connecting the wedge 2 and the outer ends of the levers, and of the projections 29 mounted on the column 7 with the ability to interact with the inner ends of the levers 26.

The lower cable-blocking mechanism (figure 2) consists of a sleeve 30 movably mounted in the inner cavity of the broadened lower end 31 of section 9, blocks 32, mounted on the end 31 of section 9, on the axles of the lower and side hinges of the parallelogram 5, cables 33 and the stop shoulder 34 attached to the drill string 7 with the ability to interact with the sleeve 30. Some ends of the gros are attached to the sleeve 30, while others are passed through rings 35 attached to the pads 4. At these ends, weights-lugs 36 are fixed with a cable.

Well spreader

works as follows. i

The device is suspended on a polyspast drilling rig system (not shown) with the ability to move along an expandable forward well along the drill string 7.

When the device is lowered, the sleeve 30 interacts with the shoulder 34, rises up and pulls the cables 33 until it stops the load stops 36 into the ring 35 on the lower plane 4 and

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raises it. Then, both strugues are raised up to the rest of the links 19 into the lower ends of the inclined slots 12, as a result of which the strugs closely approach each other. Upon further lowering of the device, section 9 starts moving upwards relative to section 8, whereby both parallelograms 5 and 6 are pushed as far as the cutters 15 into the rock.

Next, begin lifting the device. At the beginning of the lift, the wedge 2 fixes the section 9 against axial movement, excluding the possibility of shifting the paralpello j grams. After body 3 and parallelograms 5 and 6 are raised up, strugs A will hang at the ends of chains 25 and a strug will begin to rise, having a smaller number of incisors in contact with the rock. At the beginning of the ascent, the links 19 and 22 will pass along the inclined slots m 12 and 13 and press the incisors 15 into the rock. The less loaded plow will rise until both plows take up a position corresponding to the slope of the rock formation. Then both planes will rise simultaneously, a strict breed. To reduce the friction of the bonds 19 and 22 against the walls of the slits, the connections may have bearings or be covered with rubber.

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 when the device is raised, the rock is cut by the advanced cutters 15, and the downward cutters in each cutting line ensure the straightness of movement and are redundant in case of cleavage of the forward river. It is recommended to install turning, self-sharpening cutters in the strugs.

In strong abrasive rocks, the lifting speed of the device should not be higher than 0.5 m / s, and in rocks less strong - up to 2 m / s.

At the end of the ascent, after the release of the planes into the extended mouth, the device folds due to the interaction of the projections 29 with the levers 26, as a result of which the levers will raise the die wedges 2 through the pulls 28 and section 9 will be unlocked. The weight of the hinged parallelograms 5 and 6 will be the sides of the shock absorbers 16, ensuring the gap between the struts and the device body to

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approximation of the plows before the device is extended.

The column 7 and case 3 are rotated and the device is started up for the next planing cycle.

When used to clean the well from the backwash rock (erlIFT), it is advisable to periodically raise the drillpower-lifting drill string 7 to create a conical bottom shape that provides optimal conditions for moving the fractured rock to the string 7.

Claims (1)

Invention Formula A device for expanding wells, including a pulley head, a drill string on which a telescopic body is axially displaced, the upper section of which is connected to the pulley head in a rotatable manner, die wedges that are installed with the possibility of interaction with the lower section of the body, and strands with inclined slots hinge parallelogram, the upper and lower hinges of which are connected to sections of the telescopic body, and the lateral - with strugs with the possibility of placement in their inclined holes x, and ti, some ends of which are pivotally connected to the lower section of the body, while others are connected to the strugs with the possibility of being placed in their inclined slots, characterized in that, in order to increase work efficiency due to uniform loading of the plows, it is equipped with additional tons gami and the self-installation mechanism of plows, made of chains, the ends of which are fixed on the strugs, and of the sprockets covered by the chains, some of which are placed on the upper section, and others on the side hinges of the parallelogram, with some ends added itelnyh rods are pivotally connected to the upper section and the other ends are pivotally connected to the main connecting rods to form a further parallelogram, and in Strugi formed vertical slits communicated with inclined slots in which parallelogram hinges are arranged. one ok.