SU1215889A1 - Apparatus for cutting pipes - Google Patents

Description

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The invention relates to a device for cutting pipes by feeding the device to the inside of a column.

The aim of the invention is to simplify the structures.

This goal is achieved by making a return spring in the form of a wavy ring, in the hollows of which cutting elements are fixed .:

Figure 1 shows the device, a General view of figure 2 - section aa in figure 1.

The device consists of a housing 1 with radial channels 2, in which, using the ring spring 3, there are freely placed cutters 4, a piston 5 with a central channel 6 and a conical side surface 7 for engagement with the cutters 4 and a shank 8 of the piston 5, spring-loaded in the housing 1 springs 9. On the bases of the cutters 4, a hole is made, through which the spring 3 is passed. The product has a predetermined wavy shape. At small radii of this wave,

215889 2

incisors 4. In the housing 1, the channels 10 are provided for supplying the working fluid to the cutting cavity.

The device works as follows.

5 way.

The device is lowered into the interior of the column or conduit. After installation, fluid is supplied under pressure at a predetermined interval and the leading pipes are rotated. Under fluid pressure, the piston 5 moves downward, compressing the annular spring 3; and shear cutters 4 to the wall of the column. The casing is cut by rotating the body with the help of a lead pipe. After the end of the cutting, the flow of fluid is stopped, the lower spring 9 returns the piston 5 to its original position, and the annular spring 3 res20. The COW 4 returns to the transport position.

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The application of the proposed device will allow to increase productivity when cutting pipes by simplifying the device, and consequently, to increase its reliability.

.Editor N.Egorova

Compiled by A. Kornilov.

Tehred M. Gergel. Proofreader A. Zimokosov

Order 933/13 Circulation 1000 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch ShSh Patent, Uzhgorod, st. Project, 4

FIG. 2

Claims (1)

PIPE CUTTING DEVICE, comprising a housing, in the radial channels of which spring-loaded cutting elements are installed, and a spring-loaded piston with a central channel and conical surfaces for interacting with cutting elements is installed in the housing, characterized in that, in order to increase its reliability by simplifying design, the return spring is made in the form of a wave-like ring, in the hollows of which the cutting elements are fixed.