RU2410518C1 - Blind well reaming device - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention refers to construction industry, and namely to reaming devices of the wells drilled in the soil, and can be used for reaming blind wells at erection of bored piles. Device for reaming blind wells involves the operating tip made of sector plates hinged on the end of cylindrical housing, which is front as to direction of well reaming. Inside that housing there rigidly fixed is vibrator of circular vibrations and spreading mechanism of sector plates, which is made in the form of the ring installed on outer side of cylindrical housing with possibility of being moved throughout its length, which is connected by means of stiff rods to drive of back-and-forth movement.

EFFECT: reaming of blind wells in soil for drilled piles.

2 cl, 5 dwg

Description

The invention relates to construction, and in particular to devices for expanding drilled wells in the ground, and may find application for expanding blind wells in the construction of bored piles.

A device for molding in the soil of a printed pile containing a shock assembly with a working body-shaper mounted in front of the shock assembly in the form of a pointed cylindrical body. The working body-former is star-shaped, the contour of which has alternating sections with concave and convex surfaces [1].

The closest in technical essence and the achieved result is a device for expanding leader wells, including a housing with a conical tip, inside which a vibrator of circular oscillations and a feeding device are installed [2].

The disadvantage of this device is the inability to expand blind wells.

The purpose of the invention is the expansion of blind wells in the soil under the stuffed piles.

This goal is achieved by the fact that the working tip is made of sector plates pivotally mounted on the front in the direction of expansion of the well end of the cylindrical body, inside which the vibrator of circular oscillations is rigidly fixed, and the mechanism of the expansion of sector plates made in the form of a ring mounted on the outside of the cylindrical body with the ability to move along its length, which is connected by rigid rods with a reciprocating drive.

Figure 1 presents the working tip; figure 2 is a section aa of figure 1; figure 3 - working tip in the open form; figure 4 is a section bB of figure 3; figure 5 is a General view of the device.

The working tip includes a cylindrical body 1 with a guide key 2, inside of which a vibrator of circular vibrations 3 is rigidly fixed. On the outside of the cylindrical body on the guide key there is a ring with slots 4, which is connected with the help of rigid rods 5 to the traverse 6 of the reciprocating drive movement 7 mounted on the upper end of the cylindrical body, on which sector plates 9 are mounted on hinges 8, made in the form of sectors of a cone with stiffeners welded to them, which They enter the slots of the ring. At the bottom of the ribs of the sector plates are hooks 10 for fixing the sector plates in the closed position, which enter the groove of the ring. The top of the reciprocating drive is closed by a tip 11 and suspended on a rope 12, which is wound on a drum 13 mounted on a vehicle 14.

A device for expanding blind wells works as follows. The vehicle 14, together with the working tip suspended on the rope 12, is folded over the expandable well (Fig. 5). The drive of the drum 13 is turned on, and the working tip sinks to the bottom of the drilled leader well. After that, the circular vibrator 3 and the reciprocating drive 7 are turned on at the same time, which moves the traverse 6 to the upper position, and with it using rigid rods 5, the ring 4, which moves along the guide key 2 located on the outer side of the cylindrical body 1 Ring 4 acts on the ribs of sector plates 9, pushing them apart.

Oscillations of the casing in a plane perpendicular to the axis of the well reduce the effort to introduce sector plates into the ground. When the plates are opened to the desired diameter, the reciprocating drive 7 is turned off and at the same time the drum drive 13 is turned on, which, winding the rope 12, moves the working tip up to the wellhead. A working circular vibrator 3 in this case significantly reduces the pulling force required to expand the well.

After completion of the penetration, the working tip rises to the vehicle 14 and moves to the next well, after which the cycle repeats.

The execution of the working tip from sector plates, movably fixed on the front end of the cylindrical body in the direction of well expansion, inside which the circular vibrator is rigidly fixed, makes it possible to increase the well diameter by a factor of 1.8 in one pass, while the cross section of the well takes the form of an open camomile, and as a result, the surface area of the well increases, while ensuring effective compaction of the soil in the walls of the well and vibration of the working tip in the plane, perpendicular polar axis of the well, which reduces the force required to expand the hole. As a result, the energy intensity of the process of expansion of dead wells is reduced, which ultimately significantly reduces the cost of well formation, although at the same time, the bearing capacity of a printed pile made in such a well increases due to soil compaction.

Information sources

1. Patent 2126072 Russian Federation, IPC E02D 5/36. A device for forming a stuffed pile in the ground. / Failures V.M. [and etc.]; applicant and patent holder Novosibirsk state Construction Academy No. 96117171/03; declared 08/23/1996; publ. 02/10/1999.

2. Vasiliev N.V. Closed piping. M .: Nedra, 1964.214 s.

Claims (2)

1. A device for expanding blind wells, including a working tip, a circular vibrator installed in it, and a feed mechanism for the working tip, characterized in that the working tip is made of sector plates pivotally mounted on the front end of the cylindrical body in the direction of expansion of the well, inside which is rigidly fixed to the vibrator of circular vibrations, and the mechanism of extension of sector plates. 2. The device according to claim 1, characterized in that the mechanism for sliding the sector plates is made in the form of a ring mounted on the outside of the cylindrical body with the possibility of movement along its length, which is connected by rigid rods with a reciprocating drive.

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