SU397609A1 - DEVICE FOR FORMATION WELLS IN GROUND - Google Patents

Description

one

The invention relates to a device for the formation of wells in the ground by compaction.

BACKGROUND OF THE INVENTION There are known devices for the formation of wells in a ground, including a housing with a packer and a shank, a hammer and a sleeve in which electromagnetic coils are installed.

However, due to the rigid connection of the housing to the coil system, the device is rapidly destroyed.

In addition, some of the kinetic energy accumulated by the drummer during movement is not transferred to the rest of the mass of the device due to the rebound of the drummer from the anvil. Moreover, the energy transfer coefficient at an impact is lower, the smaller the ratio of the mass of the striker to the mass of the hull and the remaining parts of the device rigidly connected with it.

The aim of the invention is to improve the reliability of the device.

To do this, the electromagnetic coils are mounted so that they can move along the body, and elastic elements, such as cup springs, are fixed at the ends of the body facing the free ends of the coils.

PA drawing shows the proposed device in section.

It includes a housing / with a front conical part, inside which is placed the sleeve 2, made of ferromagnetic material. A coil system is mounted in the sleeve, which is a combination of 5 forward stroke and 4 reverse coils with their limiting poles 5, separated by non-magnetic gaskets 6. The coil system is mounted with a preload, so that the sleeve 2 is flush with its folds and rolled with the ends of the coils presses together the end surfaces of the parts 5-6. On both end sides of the coil system, elements 7 and 8 are mounted in the housing, for example, cup springs pressed with a shank 9 screwed into housing I. Inside the coil system, there is an impactor made of interconnected ferromagnetic links 10 n nonmagnetic //. Its stroke is limited by the anvil 12 and the shank 9 rigidly connected to the body. Electric energy is supplied to the coils via the cable / 5.

The device works as follows. Under the action of electromagnetic forces of gi, arising in the coils of the forward or reverse stroke when applying voltage pulses to the nnh, the blow} P k moves forward or pazad. When the voltage pulse is applied

on the forward travel coils, the coil system is displaced relative to the body towards the shank 9, compressing the elastic elements 8 as iodine by the action of the reactive forces of attraction of the magnetic parts 10 of the striker inside the forward travel coils 3, and under the action of air, its inertia force when the body is inserted / into the ground after the transfer by the impactor of the energy of the anvil 12.

Elastic elements 7 at this moment the minimum deformation. After the voltage is switched from the coils 3 to the coils 4, the striker returns to its original position {to the shank 9, and the system of the coils is displaced relative to the body in the opposite direction, compressing the elastic elements 7. Then the oscillation of the system of the coils relative to the body ceases, and the repeat cycle is. Similarly, the device operates at the exit from the well with the only difference.

that the working voltage pulses are applied to the reversing coils 4, and the forward driving coils only retract the drummer to its original position. But in both cases, the proposed movable system of coils protects them from hard impact.

Subject invention

A device for the formation of a well in the ground, including a housing with an anvil and a shank, a hammer and a sleeve in which electromagnetic coils are installed, characterized by a body1, which, in order to increase

reliability, the electromagnetic coils are mounted so that they can move along the body, and elastic elements, such as cup springs, are fixed at the ends of the body facing the free ends of the coils.