SU1754869A1 - Bucket-type drill - Google Patents

Abstract

Use: drilling of large diameter wells. SUMMARY OF THE INVENTION: The drill comprises a casing cylinder with cams, an annular auger with a screw spiral on the outer surface, a spiral auger and a drive shaft. An annular bur is cut into the rock slot, and the casing cylinder is lowered after him, fixed from rotation by means of cams. The destroyed rock from the ring drill on the surface is pushed out by rotating and axially feeding the spiral drill. 2 Il.

Description

The invention relates to mining, in particular, to devices for drilling large diameter wells in hard and frozen soils under difficult mining and geological conditions.

Ring-type devices are known for forming wells with simultaneous core sampling, in which rock destruction is carried out by creating an annular slot, and the cores formed in the middle are cut and retained in the drill body using special devices.

However, this device cannot be used when drilling loosely bonded rocks, as the core during the drilling process is destroyed and is not kept inside the drill.

Closest to the present invention is a device for the formation of wells, which includes a rod, a housing with a cutting tool and a screw

the spiral on the outer surface, as well as the mechanism for controlling the levers with pd-cutting knives for trimming the burima monolithic rock formed inside the annular drill.

The disadvantage of this ring drill design is that it can only be used in the development of rocks with a uniform structure or with sufficient layer thickness, with layered rocks in which core formation and its retention inside the shell during the extraction process is impossible. When drilling rocks with a complex mining-geological structure - thin-layer and pebble, the use of such drills is not effective, because the core formation does not occur, since the destruction of the peripheral part of the bottom ring tool also causes destruction of the rock in the middle part cracks

about

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Yo

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and loss of communication between its individual pieces. To remove the loosened mass from the wells, in these cases it is necessary to use continuous auger screw drills, which are just as ineffective due to the collapsed well walls.

The purpose of the invention is to increase the drilling efficiency in rocks with a complex geological structure and to improve the conveying ability of the drill when working on non-connected pebble and small-sized soils and rocks.

This goal is achieved by the fact that an annular drill is located inside the casing, a spiral drill is coaxially located inside the annular drill, the casing cylinder is provided with clamps and connected to the drive shaft with the possibility of rotation, axial movement, or axial locking, and an annular and spiral drills installed with the possibility of alternate inclusion in the work.

Figure 1 shows the bucket drill, a longitudinal section; figure 2 - section a - a in figure 1.

The bucket drill includes an annular drill 1 with a screw spiral 2 on the outer surface and a drive shaft 3 connected to the annular drill with the possibility of rotation and axial movement. The device is equipped with a spiral drill 4 placed in an annular drill and attached to the drive shaft by a casing cylinder 5 in which the annular auger is placed, and the drive shaft anchors 6 relative to the annular drill and the annular drill relative to the casing cylinder 7, which is a steel rod, fixed pivotally with the possibility of rotation around an axis on a metal structure associated with the upper part of the casing so that in the lower position the latch interacts with the edge of the annular drill, prevents TSS turning of it in relation to the cylinder casing. The casing cylinder is connected to the drive shaft with the possibility of rotation and fixation by cams 8 placed on the outer surface of the casing cylinder with the possibility of rotation in the horizontal plane.

Bucket drill works as follows.

Before starting drilling, the spiral drill 4 is fixed in the upper part of the annular drill 1 with the drive shaft 3 by means of clamps 6. In this case, the clamp 7 is retracted to the upper neutral position. By a message to the drive shaft 3 of rotation and pressure force, an annular auger is cut in operation, cutting an annular gap in the rock. In this case, the casing cylinder moves following the annular drill, and rotated in the horizontal plane

the locking cams 8, interacting with the external walls of the well, keep it from rotating, which contributes to the increase of the transport effect from the slot of the damaged rock by the screw 2. The use of a casing cylinder enhances the effect of transport by the screw during drilling of weakly cohesive, thinly laminated rocks, when the walls wells may collapse.

5 After the drill is drilled to its full length in case of core formation (when drilling homogeneous rocks), the latter is separated from the massif and removed from the wells using core holders. Then roundabout

0 the drill with the casing cylinder is fixed on the drilling machine, the latches 6 are removed and, by communication with the shaft 3 and the spiral drill 4, of vertical movement, push the core out of the ring drill 2.

5In case of drilling rocks in which the core

the casing of the ring drill is not formed and is filled with crushed non-bonded rock (for example, loosened pebbles on a clay-sand base), before removing the device from the well using the drive shaft 3, spiral drill 4 is put into operation, having previously removed locks 6, shaft with annular drill and casing, and

5 fixing the ring auger 1 with rotation 7 against rotation. A message to the spiral drill of rotation and pressure force leads to its penetration and the broken rock inside the ring drill to

0 move down.

Then remove the drill from the well, fix the annular drill with the casing cylinder on the drilling machine, reported using the drive shaft 3 spiral

5 borax 4 reverse upward movement, resulting in unloading of loosened rock from the annular, auger.

The use of the proposed bucket drill when drilling large-diameter wells with serial drilling machines will expand their use on rock with a complex geological structure and in frozen soils,

As a basic technique, the conventional drilling equipment is used, working together in the technological cycle with machines for soil heating.

The cost of work in this cycle is equal to the cost of drilling and the cost of heating work,

Се 2.0 rub / m3;

СН 8.0 rub / m3;

Sat СН + С1 10 rub / m3.

The cost of the calculated version of the drilling equipment is equal to

C2 - 2 rub / m3.

With the same capital investment, economic efficiency is determined as follows:

"L

E (C1-C2) A, where A is the annual volume of work, m3 - 1000

m3

O (10-2) -1000 8000 rub.

Claims (1)

Claims of the invention: A bucket drill comprising an annular auger with a screw spiral on the outer surface and a drive shaft connected to 5 with an annular drill rotatably, which is characterized by the fact that, in order to increase reliability of operation, the input shaft with an annular drill with axial displacement, while the forging drill is equipped with a spiral drill placed in an annular drill and attached to the drive shaft, the casing cylinder in which the ring is placed, a drill connected by a drive shaft with the power of rotation and fixation by means of cams positioned on the outer surface of the casing cylinder indra with the possibility of turning into a horizontal oh mp USC spine, and clamps the drive shaft 0 relative to the annular drill and annular drill relative to the casing cylinder. FIG 4 R I-l FIG. 2