SU1461867A1 - Apparatus for eliminating voids in well-drilling - Google Patents

Abstract

The invention relates to mining. The purpose of the invention is to increase the efficiency of insulation works by providing for the possibility of delivering a dry quick-hardening mixture to the well without pre-packing in waterproof bags. The device is run down on the pipes, and it contains an adapter 16 in the upper part, a container divided into two sections (C), in the upper 1 of which there is a piston 2 with an axial bore 6 and radial holes with fingers 4 with a spring 5. Placed in a C 1 dry quick setting cement mixture 15. The lower C 9 container has a shear bottom and is made with an annular groove 10 on the inner surface. In the channel 6, an upper valve 7 is installed, opening it when the fingers 4 are fixed in the groove 10. The latter is made in the lower part with a cylindrical groove 11 on the inner surface. Shear bottom vypolS (L 4 05 00 O5

Description

iK no in the form of a sealing ring 12 with a circular locking point 13, installed 1 (in the groove I and spring clip 14 we are connected to C 9. To increase the reliability of operation, the lower valve 8 is installed in the lower part of the piston 2, blocking the channel 6 during the tamping process. Made C 9 with a conical inner surface under the groove 10. Porn 2 in the lower part is made with a return conical surface. The granules of the mixture 15 are connected with well water, disintegrate with simultaneous hydration of the tangible material, forming in the cavity ka The devices rotate and mix down the well, affect its bottom part on the cement material, and press the mixture 15 into the near-wellbore. 1 3. n. f-ly, 4 Il.

The invention relates to mining and can be used in drilling wells for the elimination of cavities, karst nustos, large cracks and other cavities intersected by a well in a mountain range. The aim of the invention is to increase -: the effectiveness of insulation works by providing the possibility of delivering dry, quick-setting mixture to the well without its preliminary packing in waterproof bags, as well as new work on a weekly basis.

FIG. 1 shows the device in front of the tamponing zone, an open view; in fig. 2 - the same, in the process of the elimination of cavities and (1) formation of the wellbore; ii; (|) 11Г. 3 - the same, before descending into the well; n; i (| 1ig. 4 - the same, in the working position.

The container consists of a container divided into two sections, at the top 1 of which there is a gap 2 with the cuff 3, fingers 4 with a spring 5 in the radial holes, an axial bore 6 with the upper valve 7, the bottom valve 8 installed in its lower part with the possibility of blocking the channel 6 in the process of plugging. The bottom section 9 has an annular groove K) on the inner surface and a cylindrical groove 11 in the lower part and is equipped with a shear bottom, consisting of a sealing ring 12 with a circular locking plate 13 installed in the groove 11, and a spring bracket 14 under them fixed to the section 9, In the bed of section 1, a quick-setting cement mixture (BBS) 15 is placed.

The upper valve 7 opens the channel 6, when picking fingers 4 in the groove 10.

The lower section 9 is made with a conical inner surface under the annular groove 10, and the piston 2 in the lower part with a counter conical surface.

D.PYA descent into the well, the device is provided in the upper part of the adapter 16 connected to the drill pipe 17.

The device works as follows. Before the device is lowered into the borehole HOpnieHb 2, it is placed in the upper section 1 of the container, to which section 9 is attached. Next, from the side of section 9, a dry granulated BBS 15 is placed in the container, and a sealing ring 12 is placed into the cylindrical groove 11 of the lower section 9, locking round plate 13 and spring bracket 14. Descent

the device into the well is carried out through a string of drill pipes 17 connected to the device by an adapter 16 in the upper part of the container.

The device is lowered into the zone of complications, while the internal cavity of the container is isolated in the upper part with the black hole 2 with the sealing cuff 3 and the upper valve 7 held by the fingers 4 in the closed position, in the lower part the waterproofing is carried out due to the hydraulic effect of the well water on the locking circular plate 13, transferring the pressure on the sealing ring 12. which seals the cylindrical bore 11 in the lower section 9.

When the device reaches the bottom hole turn on the drilling machine, cut the spring bracket. 14 and depressurize the container from the bottom section 9, after which water is pumped through the drill pipe string 17, under pressure of which the piston 2 moves downward, squeezing the granulated BBS 15 from the container. At the same time, raise the container above the cavity of the cavity, fill its volume with BSS 15 granules When approaching Porshn 2 to the lower section 9, their conical surfaces are mated and the piston stops. At this moment, the fingers 4 under the action of the spring 5 go into the annular groove 10 of the lower section 9, thereby opening the upper valve 7, and the water pressure in the system drops (this is monitored by the readings of the mud pump and means fixing the fuff. /

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Srig. 2

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Claims (2)

Claim 1. A device for eliminating voids during drilling of wells, lowered on pipes, including an adapter in the upper part, a container divided into two sections, in the upper of which there is a piston with an axial passage channel and radial holes with spring-loaded fingers and a dry quick-setting grouting mixture is placed, and the lower section has a shear bottom and is made with an annular groove on the inner surface, characterized in that. what. in order to increase the efficiency of insulation work by ensuring the possibility of deliveries of dry quick-setting mixture into the well without first packing it in waterproof bags, it is equipped with an upper valve installed in the axial passage channel of the piston with the possibility of opening it when the spring-loaded fingers are fixed in the annular groove of the lower section, which it is made in the lower part with a cylindrical groove on the inner surface, and the shear bottom is made in the form of a sealing ring with a round a pirate plate installed in a cylindrical groove, and a spring bracket under them, associated with the lower section. 2. The device according to π. 1, characterized in that, in order to increase the reliability of operation, it is equipped with a lower valve installed in the lower part of the piston with the possibility of overlapping its axial bore in the process of plugging, while the lower section is made with a conical inner surface under the annular groove, and the piston in the lower part is made with a mating conical surface. FIG. 2. FIG. / FIG. 4