RU2683843C1 - Large diameter pipes bending method in field conditions using the horizontal directional drilling installation - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to the field of large diameter pipes bending in field conditions, and can be used both during construction and during the overhaul of pipelines. Large diameter pipes bending method in field conditions using the horizontal directional drilling installation involves the pipe bending using the horizontal drilling installation, its longitudinally moving carriage by means of the drill string connected to the driving the bending punches moving power wedge. Power wedge, bending punches, their guide rollers, thrust rollers are placed on the bending device bed, and the pipe bending angle is controlled by the power wedge linear displacement relative to the zero mark on the bending device bed.

EFFECT: technical result consists in increase in the productivity and the pipes bending in the field conditions implementation.

1 cl, 1 dwg

Description

The invention relates to the field of bending of large diameter pipes in the field and can be used both during construction and during major repairs of pipelines.

Currently, as a rule, for bending large-diameter pipes during construction and overhaul of pipelines, special bending machines are used that are designed only for these purposes, for example, pipe benders of the Kropotkin Machine-Building Plant GT532, GG1022, GT1425 (www.kremz.ru), or foreign equipment for a similar purpose.

The main disadvantage of this method is the high cost of equipment.

The aim of the present invention is to provide a method of bending large diameter pipes in the field using a horizontal directional drilling rig, providing:

- high efficiency of the method, since it uses universal equipment (horizontal drilling rig);

- high performance.

The specified goal is achieved through the use of:

- horizontal drilling rigs;

- drill string;

- a movable power wedge that drives the bending punches.

The essence of the present invention lies in the fact that the inventive method of bending large diameter pipes in the field using a horizontal drilling installation, including a pipe according to the invention, offers to bend it using a horizontal drilling installation, its longitudinally moving carriage connected by drill string with a movable power wedge, which drives the bending punches, while the power wedge, bending punches, their guide rollers, thrust rollers are placed on the frame g eous device and the bending angle of the pipe is controlled by a linear displacement force of the cone relative to the zero mark on the frame of the bending apparatus.

In FIG. shows a diagram of the implementation of a method of bending large diameter pipes in the field using a horizontal drilling rig, where:

1 - installation of horizontal drilling;

2 - bed bending device;

3 - drill string;

4 - carriage;

5 - power wedge;

6 - bending punch;

7 - a directing roller;

8 - a persistent roller;

9 - a pipe;

10 - zero mark;

11 is a linear scale.

The method of bending large diameter pipes in the field using a horizontal directional drill is as follows.

The horizontal drilling unit 1 and the frame of the bending device 2 fixed on the ground are connected by a drill string 3, one end of which is connected to the carriage 4 of the horizontal drilling unit 1, and the other with a power wedge 5 mounted on the frame of the bending device 2, on which bending punches 6 are also installed , guide rollers 7 and thrust rollers 8. Next, on the bed of the bending device 2 between the bending punch 6 and the thrust rollers 8 is laid pipe 9 (or two pipes 9 - see Fig.). Then, the longitudinal feed of the carriage 4 of the horizontal drilling unit 1 is turned on and the longitudinal movement of the power wedge 5 begins, which transmits the movement to the bending punch 6, while the pipe bends at an angle, the value of which is controlled by the relative zero movement of the linear scale 10 applied to the power wedge 5 marks 11 on the bed of the bending device 2.

The presence of a power wedge 5 increases the bending force P _ex. relative to the applied longitudinal force P provided by the installation of horizontal drilling 1, in accordance with the formula:

P _ex. = k × P × ctgY, where

k - coefficient of performance (COP);

Y is the angle between the longitudinal axis and the working surface of the wedge.

When bending two pipes (see. Fig.)

P _ex. = k × 0.5P × ctgY

It should be noted that for maximum efficiency it should be accepted that:

<Y ₁ = <Y (see Fig.).

The proposed method allows you to:

- bend pipes in the field using universal equipment (horizontal drilling installation);

- save on the purchase of expensive equipment.

Claims (1)

A method of bending large diameter pipes in the field using a horizontal directional drilling installation, including bending the pipe, characterized in that the pipe is bent using a horizontal drilling installation, its longitudinally moving carriage connected by a drill string with a movable power wedge leading bending punches are set in motion, while the power wedge, bending punches, their guide rollers, thrust rollers are placed on the bed of the bending device, and the bending angle of the pipe is controlled by linear cm scheniyu force the wedge relative to the zero mark on the frame of the bending apparatus.

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