SU1023055A1 - Arrangement for forming longitudinally merging wells - Google Patents

Abstract

A DEVICE FOR THE FORMATION OF LONG-CONJUGATED WELLS, including rods with barrels and a drive, characterized in that, in order to increase the depth of penetration of longitudinally-coupled wells in weak unstable rocks, it is provided with a casing pipe with cutting knives on the face, made by a body, made by a body, made by a body, made by a cutter on the face, made by a body, made by a body, made by a cutter, and made by a cutter on the face. between themselves cylinders with longitudinal slits facing each other, while the device has an X-shaped insert, spaced axially along the casing along its entire length with the possibility of axial movement and provided on the bottom the end of the cutting tip. rl5 st 5s w to go

Description

The invention relates to drilling equipment and can be used for sinking longitudinally conjugate wells under bored piles, for the construction of retaining walls. ' ₅

A device for developing wells with a given cross-sectional shape, including a rod with a bump, an expander with cutting knives and a drive [1].

The disadvantages of this device are the low productivity when driving longitudinally conjugate wells, as well as the inability to drill wells in unstable soils.

The closest to the proposed technical essence and achieved result, PE ¹⁵ is a device for forming a longitudinally-paired wells, comprising a rod and a picker drive [2].

A disadvantage of the known device is the limited penetration depth of ₂₀ longitudinally conjugate wells in unstable soils, which is due to the lack of protective equipment against collapse of the walls of the well in the device.

The purpose of the invention is to increase the penetration depth of longitudinally conjugate wells ²⁵ in weak unstable rocks.

This goal is achieved by the fact that the device for the formation of longitudinally conjugate wells, including rods with bumps and a drive, is equipped with a casing pipe with cutting knives at the end, made in the form of mating cylinders with longitudinal slots facing each other, while the device has X-shaped insert placed along the axis of the casing along the entire length with the possibility of axial movement and equipped with a cutting tip on the lower end.

In FIG. 1 shows a device, a longitudinal section; in FIG. 2 — section A — A in FIG. 1; in FIG. 3 - X-shaped insert 40 on an enlarged scale, cross section.

A device for the formation of longitudinally conjugated wells includes a casing 1 with cutting knives 2, consisting of

AA from two parallel-connected pipes 3 with longitudinal slots 4. In the inner cavity of the casing 1 there are screw rods 5 with bores 6, as well as an X-shaped insert 7 with channels 8 and 9 and a cutting tip 10 at the lower end.

A device for the formation of longitudinally conjugated wells works as follows.

The device is installed along the axis of the future well and, using a drive (not shown), both screw rods 5 are rotated 5. Muds 6 drill two leading parallel cylindrical wells, and the casing 1 with cutting knives 2 and with them an X-shaped insert 7 under with their own weight they are immersed in the ground, expanding the leading cylindrical wells to obtain one longitudinally conjugate well, the cross-section of which corresponds to the cross-sectional shape of the casing pipe 1. At the same time, the cutting tips 10 splits the remaining wells between the advancing ground pillar and supplies it to the coils of the screw rod 5. Primer destroyed picker 6 and the cutting tip 10, imposed screw 'rods 5 through the pipes 3 to the surface. In unstable rocks, the casing 1 prevents the collapse of the walls of the well.

After reaching the design level, both screw rods 5 and the X-shaped insert 7 are removed to the surface. Channels 8 and 9, communicating the outer space and the bottom of the well, prevent the formation of vacuum at the bottom and facilitate the extraction of drill rods 5 and the X-shaped insert 7 from the pipes 3.

In stable soils, the entire device is removed from the well, and in unstable soils the casing is removed simultaneously with concreting.

When using the proposed device increases the possible penetration depth of longitudinally conjugate wells in weak unstable rocks under the protection of the casing.

Figure 2

ВНИИПИ Order 4173/20 Circulation 603 Subscription

Branch of the PPP "Patent", Uzhhorod, st. Project, 4

Claims (1)

DEVICE FOR THE FORMATION OF LONGITUDINAL-BOUNDED WELLS, including rods with bored holes and a drive, characterized in that, in order to increase the depth of penetration of longitudinally conjugate wells in weak unstable rocks, it is equipped with a casing pipe with cutting knives at the end face, made in the form of interfaced cylinder with longitudinal slits facing each other, wherein the apparatus has an X-shaped insert, the dimensions of the casing _t schennuyu axially over the entire length with the possibility of axial movement and provided at the lower end cutting tip.