SU1514902A1 - Arrangement for applying axial load to rock-breaking tool - Google Patents

Abstract

The invention relates to the mining industry and is intended to guide horizontal and directional wells. The goal is to increase reliability in work. The device comprises a housing 1, sliding support elements 2 located thereon, a rod (Ø) 4. In the upper part of Ø 4, a piston 3 is located in the cavity of housing 1. In the lower part of Ø 4 there are means for communicating with a rock-cutting tool. Centralizers 6 are mounted on the W 4 with the possibility of axial movement. The outer surface of W 4 along the length is made with several profile sections 7 of different configuration. Each of the centralizers 6 has a reciprocal longitudinal surface of the corresponding part W 4. As W 4 extends out of housing 1, the centralizers 6 are evenly distributed along the length of W 4, preventing it from bending and facilitating the transfer of all the hydraulic force developed by the device directly to the lower layout elements. The invention makes it possible to increase the rigidity of the lower part of the drill string assembly and to change the type of generated axial load from uniformly distributed in length to concentrated. 6 Il.

Description

315U

The housing 1 houses a piston 3. In the lower part of the W 4 there are placed means for communicating with the rock-breaking tool. The centralizers 6 are mounted on the W 4 with axial movement. HapyjfcHaH the W 4 surface along the length is made with several shaped sections 7 of different configuration. Each of the centralizers 6 has a reciprocal longitudinal surface {of the corresponding part W 4, As the DI 4 rises from the housing 1

centralizers 6 are evenly distributed along the length of Ø 4, preventing it from bending and facilitating the transfer of all the hydraulic force developed by the device directly to the lower layout elements. The invention makes it possible to increase the rigidity of the lower part of the drill string assembly and to change the type of generated axial load from uniformly distributed in length to concentrated. 6 Il.

The invention relates to the field of mining, in particular to the wiring of both horizontal and directional wells.

The purpose of the invention is to increase the reliability of the device.

FIG. 1 shows an apparatus for creating an axial load on a rock-destroying tool, a slit; in fig. 2 - the lower part of the rod; in FIG. 3 a section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one; in fig. 5 shows a section B-B in FIG. 2; in fig. 6 - section GGD in FIG. 2,

A device for creating an axial load on a rock-breaking tool comprises a housing 1, remote mounting elements 2 located thereon, a piston 3, rigidly connected to the upper part of the rod 4, the piston 3 and part of the rod 4 being located in the housing 1.

The lower part of the stem 4 has means for communicating with a rock cutting element (not shown), made in the form of, for example, threaded at the gastric 5. On the stem 4, the centralizers 6o are axially displaced. The outer surface of the stem 4 (FIG. 2) along the length is made with several core sections 7 of various configurations. As a result, several steps 8 are formed on the rod, and each of the centralizers has a counter section, the surface 9 of the corresponding part of the rod 4 (Fig. 3 and 4).

The device works in the following way.

Upon receipt of the pulverized fluid with a certain pressure in the supporting elements 2, the latter are fixed

In the borehole, the housing 1, due to the difference in cross sections of the housing 1 and the internal cross section of the stem 4, creates a pressure differential. Under the action of the hydraulic force that has arisen, the piston 3 with the rod begins to move downward, thus creating an axial load on the rock-breaking tool. The movable fixed centralizers 6, which touch the walls of the well, remain stationary relative to them when the well is deepened and the stem 4 is rotated from the body 1.

The rotors move along the facets of the stem 4j until they reach the steps 8 on the stem 4. The over-centering freely passes the lower ledge 8, since each centralizer has an internal section (surface 9 on

Fig. 3 and 4) and continues to move along the faces of the stem 4 until it reaches the upper ledge 8. Thus, as the stem 4 moves up from the housing 1, the centralizers 6 are evenly distributed along the length of the stem, preventing it from bending and facilitating the transfer of the entire developed the device of hydraulic force directly on the lower layout elements. When the piston 3 reaches its lowest position, an opening 10 is opened, which causes a pressure drop in the circulation system. It means that

the device should be recharged The recharge of the device is performed by lowering the housing 1 to the lower position.

The use of this device in the mining industry, in particular for drilling horizontal and directional wells, excludes the aged drilling rig from the composition

51

pipe, increases the rigidity of the lower part of the drill string assembly and changes the type of axial load created from uniformly distributed in length to concentrated.

Form ula invention

A device for creating an axial load on a rock-destroying tool, including a housing, Basing-shaped supporting elements located on it, a rod having a port in the upper part

phi.2

149026

It is also in the lower part of the means for communicating with the rock-breaking tool, characterized in that, in order to increase reliability of operation, it is equipped with centralizers located on the rod with the possibility of axial movement, and the outer surface of the rod is 10 s long several core sections of various configurations, and each of the centralizers has a counter profile surface of the corresponding part of the rod.

f-puaff

Claims (3)

Claim A device for creating an axial load on a rock cutting tool, including a housing, retractable support elements located on it, a rod having a rod located in the upper part of the housing cavity pore 14902 6, and in the lower part of the means for communication with the rock cutting tool, characterized in 5 that, in order to increase reliability, it is equipped with centralizers located on the stem with the possibility of axial movement, and the outer surface of the rod along the length 10 is made with several profile sections of various configurations, and each of the centralizers has a corresponding profile surface of the corresponding part of the rod. fi g b