SU1231149A1 - Method and apparatus for trenchless laying of pipeline - Google Patents

Abstract

1. The method of trenchless pipeline laying, including pulling into a curvilinear well mounted on the shore and laid on the runway in the pipeline junction, is different from the fact that, in order to expand the technological capabilities by ensuring pulling of the pipeline with a diameter of 1420 mm with a bend within radius of elastic bending, as a trigger, use height-adjustable supports, with the help of which they are given a bend along the entire length equal to the curvature of the borehole with an angle of inclination on Horizon to the head portion of the pipeline, equal to the angle of inclination of the wellhead and at the mouth of the latter is set and fixed at a predetermined angle guide pipe with a seal through which the introduced and drags on S -shaped curve. into the well the whole pipeline. 2. A device for trenchless laying of a pipeline, comprising a drilling tool pivotally connected to the pipeline head, characterized in that it is provided with an intermediate tubular element disposed between the drilling tool and the pipeline head, and the articulation link intermediate tubular element with a drilling tool and a rod head of the pipeline is made in the form installed on one of its end surfaces and in the middle part of its internal morning cavity hinges. with $ (L to GO 4i CO

Description

The invention relates to construction and can be used in the construction of pipeline crossings through water and ground obstacles.

The purpose of the invention is the expansion of technological capabilities by providing a pipeline with a diameter of 1420 mm and bending within an elastic bend radius.

FIG. 1 shows a diagram of laying a pipeline in a curvilinear well; in fig. 2 - arrangement of the wellhead arrangement; in fig. 3 is a diagram of pipeline pulling in a well and a device for pulling it.

The pipeline is laid as follows. Before starting the pulling of the pipeline 1 into the well, the wellhead is equipped: at the entrance of the pipeline 1 to the well, a guide pipe 2 with a diameter greater than the diameter of the pulled pipeline 1 is installed and fixed in the soil at a given angle 1720 mm tube). Then, at the transition point at a predetermined angle to the wellhead, the pipeline is installed on supports 3, the height of which is adjusted depending on the angle of entry. The use of such supports makes it possible to bend the transition pipe of a large diameter so that its bending is essentially equal to the curvature of the well, and the angle of inclination of the head part to the horizon is equal to the angle of inclination ot the wellhead, which is determined by the project. A sealing gasket is inserted between the guide tube 2 and the pipe being pulled in.

device 4, which prevents the leakage of drilling mud. An intermediate tubular element 6 is sequentially connected to the head part 5 of the pipeline 1 installed in the design position by means of a rod 7, one end of which is rigidly fastened to the pipeline head 5 and the other is connected to the hinge 8 located in the central part of the tubular element. In turn, the intermediate tubular element 6 by means of the hinge 9. is attached to the drilling tool 10, after which the penetration begins. During the dragging process, the pipeline comes down from the supports and is pulled through the guide pipe 2 into the well in an S-shaped curve, with a smooth bend of the pipeline 1 following the shape of the well trajectory at the point of inflection. The specified bending of the pipeline during the dragging process inside the well is given by means of a tubular element 6 connected to the head part 5 of the pipeline 1. The intermediate tubular element 6 is a pipe with a diameter approximately equal to the diameter of the drawn pipeline. The head 5 of pipeline 1 must be hollow, not filled with Liquid or auxiliary equipment. In this case, the head part 5 of the pipeline 1 creates a lifting force in the medium of the liquid clay mortar, which gives the pipeline a curvature during pulling that corresponds to the well trajectory. Such a structure allows the tubular element to evenly perceive the reaction from the soil of the walls of the well, thereby preventing the pipeline being pulled in the well.

srig.2

Editor M. Dylyn Order 2544/34

Compiled by A. Starikov

Tehred V. Kadar Proofreader E. Roshko

Circulation 641Subscribe

VNIIPI USSR State Committee

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

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. A method of trenchless laying of a pipeline, including pulling a pipe mounted on a shore and laid on a trigger track in a pipeline transition line into a curved hole, characterized in that, in order to expand technological capabilities, it allows pulling a pipeline with a diameter of up to 1420 mm with a bend within the radius of elastic bending, as a trigger track, height-adjustable supports are used, with which they give it along the entire length a bend equal to the curvature of the well with an angle of inclination to a head portion of the pipeline equal to the angle of inclination of the wellhead, and at the mouth of the latter, a guide pipe with a seal is installed and fixed at a predetermined angle, through which the entire pipeline is introduced and dragged along the S-curve. 2. A device for trenchless laying of a pipeline, comprising a drilling tool pivotally connected to the head of the pipeline, characterized in that it tg is provided with an intermediate tubular element located between the drilling tool and the head of the pipeline, and the head of the pipeline has a rod, while the articulated connection of the intermediate the tubular element with a drilling tool and a rod of the head of the pipeline is made in the form of installed on one of its end surfaces and in the middle part of it inside It cavity hinges.