SU1361284A1 - Apparatus for rotary-percussive drilling - Google Patents

Abstract

The invention relates to the drilling of wells in hard rock and improves drilling efficiency. The device includes a housing 1 with impactors installed in it (U) 2 and 3, which divide it into idle 5 and 4 stroke chambers, an air distribution system and a drill bit 11. A step anvil (I) 6 is connected to it with a central exhaust channel (K) 7 and radial K 9 and 10. U 2 and 3 are located concentric with H 6 and form buffer chambers 17 and 18 with its upper and middle stages. K 7 is connected to chambers 17,18 and 5 through K 9 and 10. The lower part of the 3 has projections of a sinusoidal shape, and And 6 has a response protrusions 19. By (; / 5

Description

as compressed air is supplied to the 5 U 2 chamber, K 9 and 1Q rises and opens. At the same time, Y 2 stops, and Y 3 cuts chamber 5 from chamber 4. Next, U 2 and 3 are lowered by supplying air to chamber 4. First, the invention relates to drilling wells, in particular to drilling in hard rocks.

The purpose of the invention is to increase the drilling efficiency.

FIG. 1 shows a longitudinal section of the device; in fig. 2 is a diagram of the mutual arrangement of the protrusions of the anvil and the drummer; in fig. 3 is a section A-A in FIG. one; in fig. 4 - section BB in FIG. one.

The device includes a housing 1 in which two impactors 2 and 3 are installed, one relative to the other with a gap cG, dividing the housing to the working 4 and idle 5 chambers, the casing also has a step anvil 6 with a central exhaust channel 7 and radial channels 8-10. In the lower part, the anvil is connected to the crown 11 and through the spline protrusions 12 with the wider spline grooves 13 of the housing 1. The impactors 2- and 3 are located concentrically relative to the anvil 6, the anvil consists of the upper 14, middle 15 and lower 16 steps. Drummers 2 and 3 are located concentrically relative to the anvil with the ability to interact with its steps and form with the upper 14 and middle 15 steps of the anvil buffer chambers 17 and 18 connected through the radial channels 9 and 10 with the central exhaust channel 7, and by means of Channel 8 - with idle speed camera 5. At the lower stage of the anvil, projections 19 are sinusoidal in shape, and on the shock (lower) part of the drummer 3, protrusions 20 corresponding to them are made.

The device works as follows.

The device is lowered into the well and turned on. When free

It rises Y 2 through H 6, and then Y 3. Thanks to the interaction of the protrusion 19 and the protrusion H 6, the energy U 3 is converted into a shock load parallel to the back-. fight Next, the striking cycles are repeated. 1 hp f-ly, 4 ill.

the suspension of the housing 1 anvil 6 occupies the lowest position, the channels 8 are below the impact end of the hammer 3 and the tool is locked. When setting the bit to the bottom, the details of the device will occupy the position shown in FIG. 1. As compressed air is supplied to the idling chamber 5, the impactors 2 and 3 will begin to move upward until they overlap the surfaces of channels 9 and 10. As the mass of the impactor 2 is smaller, it will stop earlier, the impactor 3 will catch up with it, close the gap. Camera 5 idling will be cut off from camera 4 working stroke. After that, both of the impact pistons will begin to move downward by supplying compressed air into the chamber 4 of the working stroke. First, the striker 2 strikes the anvil, forming a load directed perpendicular to the bottom plane, and the bit cutters are immersed in the rock. With a lag of 0.001 seconds, the striker 3 strikes the lower part of the anvil 6, but as a result of the interaction of the projections 19 of the anvil and 20 striker 3, the energy of the striker 3 is converted into a shock load directed parallel to the face.

In the following, the striking cycles are repeated.

At the moment of impact of the striker 3 with the lower step 16 of the anvil 6, the latter will rotate relative to the housing 1 in the direction of rotation, since the spline protrusions 12 are made already with the slotted grooves 13. The impactor 3 is installed in the housing 1 with the possibility of only longitudinal movement relative to the housing. Invention Formula

1. The device is a shock-rotational drilling, comprising a housing with

the percussion devices installed in it and dividing it into the idle and working chambers, the air distribution system and the drill bit, which is due to the fact that, in order to increase the drilling efficiency, it is equipped with a stepped anvil connected to the crown with at the same time, the impactors are located concentrically relative to the anvil with the possibility of interacting with its steps and movements relative to the latter and form buffer

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chambers, the central exhaust channel is connected by radial channels made in the anvil with buffer chambers and an idling chamber, and on the lower part of one of the impactors there are protrusions capable of interacting with the protrusions and protrusions on the anvil.

ten :

2. The device according to claim 1, characterized in that the protrusions on the lower part of one of the strikers and; on the anvil have a sinusoidal 15 form.

Editor A. Kozoriz

Compiled by V. Zotov Tehred M. Didyk

Order 6289/35 Circulation 533 Subscription

VNIIPI USSR State Committee

for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader L. Patay

Claims (2)

Claim 1. Impact-rotary drilling device, comprising a housing with '3 hammers installed in it and dividing it into idle and working chambers, an air distribution system and a drill bit, which, in order to increase the efficiency of drilling, it is equipped with a step anvil connected to the crown with a central exhaust channel, while the impactors are arranged concentrically relative to the anvil with the possibility of interaction with its steps and movement relative to the latter and form from the upper and middle steps 15 of the buffer chamber, the central exhaust channel being connected by means of radial channels made in the anvil with the buffer chambers and the idle chamber, and on the lower part of one of the projectors protrusions are made with the possibility of interaction with mating protrusions made on the anvil. 2. The device according to claim 1, characterized in that the protrusions on the lower part of one of the strikers and on the anvil have a sinusoidal shape. 2D A-2 ^{ag: 2}