SU1276769A1

SU1276769A1 - Method of trenchless laying of pipelines

Info

Publication number: SU1276769A1
Application number: SU853866987A
Authority: SU
Inventors: Михаил Алексеевич Камышев
Original assignee: Всесоюзный научно-исследовательский институт по строительству магистральных трубопроводов
Priority date: 1985-03-06
Filing date: 1985-03-06
Publication date: 1986-12-15

Abstract

Изобретение относитс к области горной и строительной промышленности и предназначено дл способов прокладки трубопроводов под преп тстви ми. Цель изобре теки увеличение длины прокладки за счет снижени давлени трубопровода (Т) 3 на стенки скважины (С). Дл этого буровой раствор 15 перед ТЗ вытесн ют из С 2 и одновременно с протаскиванием Т 3 уплотн ют стенки С 2. В период протаскивани Т 3 через С 2 поршень 10, продвига сь перед Т 3, очищает С от бурового раствора 15, который сливаетс в котлован 7. Одновременно наружное уплотнение 11 поршн 10 укрепл ет стенки С 2. Таким образом ТЗ протаскиваетс через обезвоженную скважину, что исключает его удельное давление на свод С 2 под действием выталкиваюш ,ей силы бурового раствора 15. 2 ил. с ю 05 С5 соThe invention relates to the field of mining and construction industry and is intended for methods of laying pipelines in obstacles. The purpose of the invention is to increase the length of the gasket by reducing the pressure of the pipeline (T) 3 against the walls of the well (C). For this, the drilling fluid 15 is displaced from the C 2 before the TZ, and simultaneously with the dragging of T 3, the walls of the C 2 are compacted. In the period of pulling T 3 through the C 2, the piston 10, moving ahead of T 3, clears C of the drilling fluid 15, which merges into the pit 7. At the same time, the outer seal 11 of the piston 10 strengthens the walls C 2. Thus, the TZ is pulled through the dehydrated well, which excludes its specific pressure on the roof C 2 under the action of the ejector, the force of the drilling fluid 15. 2 Il. from 05 C5 with

Description

Изобретение относитс к горной и строительной отрасл м, в частности к способам прокладки трубопроводов под преп тстви ми .The invention relates to the mining and construction sectors, in particular to methods for laying pipelines in obstacles.

Цель изобретени - увеличение длины прокладки за счет снижени давлени трубопровода на стенк-и скважины.The purpose of the invention is to increase the length of the gasket by reducing the pressure of the pipeline on the walls of the well.

На фиг. 1 показана схема процесса прокладки трубопровода, осуществл емой способом «обратного зат гивани трубопровода в скважину; на фиг. 2 - схема «проталкивани трубопровода в скважину.FIG. Figure 1 shows a diagram of the process of laying a pipeline, carried out using the method of "reverse drawing of a pipeline into a well; in fig. 2 is a scheme for "pushing a pipeline into a well.

Под руслом реки 1 буритс пилотна дугообразна скважина 2, котора затем расшир етс разбуриванием до диаметра, превышающего диаметр прокладываемого трубопровода 3. Бурение и расширение разбури- вапием скважины 2 производитс известным способом с применением буровой установки , закрепленной на одном берегу реки и включаюш,ей наклонную рампу 4, по которой может передвигатьс силова каретка 5 и буровой мотор 6, систему приготовлени и подачи в скважину буровой жидкости , анкерное устройство (не показаны).Under the riverbed 1, the boring pilot arc-shaped well 2, which is then expanded by drilling to a diameter greater than the diameter of the pipeline to be laid 3. Drilling and expansion by drilling 2, is performed in a known manner using a drilling rig fixed on one side of the river and including its inclined a ramp 4, along which the power carriage 5 and the drilling motor 6 can move, the system for preparing and feeding drilling fluid into the well, an anchor device (not shown).

Дл приема буровой жидкости из скважины открывают котлованы 7 по верхней схеме у буровой установки, по нижней схеме - па противоположном берегу. В устье скважины установлена направл юнла труба 8, внутренний диаметр которой превышает наружный диаметр нрокладываемого трубонровода 3. В скважину 2 введен через трубу 8 за1 лушенный с торца трубопровод 3 на парнирпом сцепе 9 с очистным поршнем 10, имеющим наружное уплотнение 11, диаметр которого превьппает диаметр скважины 2. Второй конец поршн 10 (фиг. 1) св зан колонной труб 12 с силовой кареткой 5 буровой установки, а (фиг. 2) тросом 13 с т говой лебедкой 14, установленной па противоположном от буровой установки берегу. Внутренн полость скважины 2 перед порпшем 10 заполнена буровой жидкостью 15, котора сливаетс в котлован 7, а за поршнем 10, где размешен трубопровод 3, скважина 2 обезвожена. Стрелками показано направление перелТ,ви- жени трубопровода 3.To receive drilling fluid from the well, the trenches 7 are opened according to the upper scheme at the drilling rig, according to the lower scheme - on the opposite bank. A pipe 8 is installed at the wellhead, the inner diameter of which exceeds the outer diameter of the laying pipeline 3. The well 2 is inserted through the pipe 8 through the pipe 3, which was perforated from the end, on the connecting rod 9 with the cleaning piston 10 having an outer seal 11, the diameter of which exceeds the diameter borehole 2. The second end of the piston 10 (Fig. 1) is connected to the column pipe 12 with the power carriage 5 of the drilling rig, and (Fig. 2) with a cable 13 with a traction winch 14 installed on the bank opposite to the drilling rig. The internal cavity of borehole 2 before pores 10 is filled with drilling fluid 15, which is drained into pit 7, and behind piston 10 where pipeline 3 is placed, well 2 is dewatered. The arrows indicate the direction of the transfer, the direction of the pipeline 3.

Процесс протаскивани трубопровода в скважину в направлении к б уровой уста- повке осуществл етс следующим образом. На противоположном от буровой установки берегу по известной технологии изготавливают плети трубопровода 3, длина которых онредел етс услови ми рельефа местности . Все плети испытывают, в первую из них устанавливают в створ перехода на ро- ликоопоры дл последующего протаскивани в скважину 2. В устье скважины монтируют под заданным углом направл юп ую трубу 8. Перемещением каретки 5 вниз но наклонной рампе 4 буровой установки обеспечивают передвижение в скважине колонны труб 12 и выход ее конца через трубу 8The process of pulling the pipeline into the well in the direction to the level of installation is carried out as follows. On the bank opposite to the drilling rig, scaffolds of pipeline 3 are made using known technology, the length of which is determined by the conditions of the terrain. All lashes are tested, the first of them is placed on the transition to the roller supports for subsequent pulling into the well 2. In the wellhead the directional pipe 8 is mounted at a given angle 8. Moving the carriage 5 downwards but with an inclined ramp 4 of the drilling rig provides movement in the well pipe columns 12 and the output of its end through the pipe 8

0 0

5 five

на противоположный берег. К этому к-онцу колонны труб 12 присоедин ют очистной поршень 0 и па шарнирном сцепе с ним оголовок первой плети трубопровода 3, установленной на роликоопорах в створе перехода . Перемещением силовой каретки 5 (в направлении, указанном стрелкой) св занна с кареткой 5 колонна труб 12 через трубу 8 вводит в скважину 2 и нротаски- вает через нее очистной поршень 10 и на сцене с ним первую плеть трубопровода 3. Когда.перва плеть трубопровода введена в скважину, процесс протаскивани приостанавливаетс , в створ перехода на ролико- оноры устанавливают вторую плеть трубопровода 3, конец которой присоедин ют к ранее проложенной в скважину первой плети трубопровода 3. И так процесс продач- жаетс до его заверп1ени , когда поршень 10 и оголовок трубонровода 3 выйдут из скважины на берег, где закреплена бурова установка.on the opposite shore. To this end of the column of pipe 12, a cleaning piston 0 is attached and, with a hinged link with it, the tip of the first strap of the pipeline 3 installed on the roller supports in the transition joint. Moving the power carriage 5 (in the direction indicated by the arrow), a string of pipes 12 connected to the carriage 5 enters the well 2 into the well 2 and pulls the piston 10 through it and at the stage with it the first pipe lash 3. When the first pipe lash entered into the well, the process of pulling is suspended, a second strip of the pipeline 3 is installed in the valve moving section, the end of which is connected to the first pipeline of the pipeline 3 previously laid in the well. And so the process is sold to him 10 and the tip of the pipeline 3 will come out of the well to the shore, where the rig is fixed.

Процесс протаскивани трубопровода в скважину от буровой установки осуществл етс иначе. В устье скважины монтируют под заданным углом направл ющую трубу 8. Предварительно изготовленные двухтруб - 5 ки 16 поочередно устанавливают на наклонную рамну 4 буровой установки дл носледую- протаскивани в скважину 2. К оголовку первой (из установленных на рампу 4) двухтрубки 16 присоедин ют на шарнирном сцепе 9 очистной поршень 10, свободный конец которого прикрепл ют к тросу 13, проход щему сквозь скважину 2 и св занному с т говой лебедкой 14. закренленной на противоположном от буровой установки берегу. Перемещением каретки 5 вниз по наклонной рампе 4 очистной поршень и св занна с ним на шарнирном сцепе 9 перва двухтрубка 16 через трубу 8 ввод тс в скважину 2 так, чтобы конец двухтрубки 16 оставалс вне скважины. Затем каретка 5 отводитс наверх, в освободившийс проем па рампу 4 устанавливают следующую двух- трубку 16, конец которой присоедин ют к концу первой двухтрубки, уже наход щейс в скважине. После изол ции сваренного стыка втора двухтрубка аналогично заводитс в скважину 2. Процесс продолжаетс до его завершени , когда на противоположном берегу поршень 10 и оголовок трубопровода 3 выйдут из скважины 2. По этой схеме при протаскивании трубопровода 3 через скважину 2 используетс вначале раздельно, а затем одновременно сила задавливани трубонровода в скважину, прикладываема силовой кареткой 5 от буровой установки, и спла т ги трубопровода, передаваема , тросом 13 от т говой лебедки 14.The process of pulling the pipeline into the well from the rig is different. At the wellhead, a guide tube 8 is mounted at a predetermined angle. Prefabricated two pipes - 5 ki 16 are alternately mounted on an inclined frame 4 of the drilling rig for the following dragging into the well 2. To the top of the first two pipe (of those installed on ramp 4) two pipes 16 an articulated coupling 9, a cleaning piston 10, the free end of which is attached to the cable 13 passing through the borehole 2 and connected to the traction winch 14. secured on the bank opposite to the drilling rig. Moving the carriage 5 down the inclined ramp 4 to the cleaning piston and the first two-tube 16 connected to it on the hinged coupling 9 through the pipe 8 are introduced into the well 2 so that the end of the two-tube 16 remains outside the well. Then the carriage 5 is retracted upward, and the next two-pipe 16 is installed into the vacant opening of the ramp 4, the end of which is connected to the end of the first two-pipe already in the well. After isolating the welded joint, the second two-pipe likewise enters the well 2. The process continues until its completion, when on the opposite bank the piston 10 and the tip of the pipeline 3 come out of the well 2. According to this scheme, when dragging the pipeline 3 through the well 2, it is used first separately and then at the same time, the force of the pipeline driver's crushing into the well, applied by the power carriage 5 from the drilling rig, and the pipeline alloy transmitted by the cable 13 from the traction winch 14.

В схемах, приведенных на фиг. 1, в период протаскивани трубопровода через скважипу 2 поршень 10, продвига сь перед трубопроводом 3, очищает скважину от бу0In the diagrams shown in FIG. 1, during the dragging of the pipeline through the borehole 2, the piston 10, advancing in front of the pipeline 3, cleans the borehole from bu0

5five

00

5five

Claims

The invention relates to the mining and construction sectors, in particular to methods for laying pipelines in obstacles. The purpose of the invention is to increase the length of the gasket by reducing the pressure of the pipeline on the walls of the well. FIG. Figure 1 shows a diagram of the process of laying a pipeline, carried out using the method of "reverse drawing of a pipeline into a well; in fig. 2 is a scheme for "pushing a pipeline into a well. Under the riverbed 1, the boring pilot arc-shaped well 2, which is then expanded by drilling to a diameter greater than the diameter of the pipeline 3 to be laid. Drilling and expansion by drilling 2 is carried out in a known manner using a drilling rig fixed on one side of the river and including its inclined ramp 4 , along which the power carriage 5 and the drilling motor 6, the system for preparing and feeding drilling fluid into the well, an anchor device (not shown) can move. To receive drilling fluid from the well, the trenches 7 are opened according to the upper scheme at the drilling rig, according to the lower scheme - on the opposite bank. A pipe 8 is installed at the wellhead, the inner diameter of which exceeds the outer diameter of the laying pipeline 3. The well 3 is inserted through pipe 8 by the end of the pipeline 3 at the connecting pipe 9 with the cleaning piston 10 having an outer seal 11, the diameter of which exceeds the diameter of the well 2. The second end of the piston 10 (FIG. 1) is connected to the column pipe 12 with the power carriage 5 of the drilling rig, and (FIG. 2) with a cable 13 with a traction winch 14 mounted on the bank opposite to the drilling rig. The internal cavity of borehole 2 before pores 10 is filled with drilling fluid 15, which is drained into pit 7, and behind piston 10 where pipeline 3 is placed, well 2 is dewatered. The arrows indicate the direction of the transition, the descent of the pipeline 3. The process of pulling the pipeline into the well in the direction of the drilling installation is carried out as follows. On the bank opposite to the drilling rig, scaffolds of pipeline 3 are made using known technology, the length of which is determined by the conditions of the terrain. All lashes are tested, in the first of them they are installed on the transition point to roller-supports for subsequent dragging into borehole 2. In the wellhead, the guide pipe 8 is mounted at a given angle 8. Moving the carriage 5 downwards but with an inclined ramp 4 of the drilling rig provides for movement in the borehole of the pipe string 12 and the exit of its end through the pipe 8 to the opposite bank. To this end of the column of pipe 12, a cleaning piston 0 is attached and, with a hinged link with it, the tip of the first strap of the pipeline 3 installed on the roller supports in the transition joint. Moving the power carriage 5 (in the direction indicated by the arrow), a string of pipes 12 connected to the carriage 5 enters the borehole 2 through the pipe 8 and pulls the cleaning piston 10 through it and at the stage with it the first lash of the pipeline 3. When the first pipeline lash is introduced into well, the process of pulling is suspended, a second strip of pipeline 3 is installed in the roll-over valve, the end of which is connected to the first pipeline of pipeline 3, which was previously installed in the well. And so the process is sold until it is wrapped when the piston 10 and the tip of the pipeline 3 will come out of the well to the shore, where the rig is fixed. The process of pulling the pipeline into the well from the rig is different. At the wellhead, the guide tube 8 is mounted at a predetermined angle. The pre-made double pipes 16 are alternately mounted on the inclined frame 4 of the drilling rig for subsequent drilling into the well 2. To the tip of the first (of the two pipes 16 installed on the ramp) two are attached to the hinge coupling 9 a cleaning piston 10, the free end of which is attached to the cable 13 passing through the borehole 2 and connected to the traction winch 14. fastened on the bank opposite to the drilling rig. Moving the carriage 5 down the inclined ramp 4 to the cleaning piston and the first two-tube 16 connected to it on the hinged coupling 9 through the pipe 8 are introduced into the well 2 so that the end of the two-tube 16 remains outside the well. Then the carriage 5 is retracted upward, and the next two-pipe 16 is installed into the vacant opening of the ramp 4, the end of which is connected to the end of the first two-pipe already in the well. After isolating the welded joint, the second two-pipe likewise enters the well 2. The process continues until its completion, when on the opposite bank the piston 10 and the tip of the pipeline 3 come out of the well

2. According to this scheme, when pulling the pipeline 3 through the borehole 2, it is first used separately, and then at the same time, the pushing force of the pipeline into the well, applied by the power carriage 5 from the drilling rig, and the pipeline joint, transmitted by the cable 13 from the traction winch 14. In The diagrams shown in FIG. 1, during the dragging of the pipeline through the borehole 2, the piston 10, advancing in front of the pipeline 3, cleans the well of drilling fluid 15, which is drained into the pit 7. At the same time, the outer seal 11 of the piston 10 strengthens the borehole walls. Thus, the pipeline 3 is pulled through the dehydrated well, which excludes its specific pressure on the wellhead under the influence of the buoyancy force of the drilling fluid 15. The invention The method of trenchless pipeline laying, according to which the pilot

arcuate well, expand it and simultaneously with the supply of drilling mud into the well, the pipeline is pulled into the extended well, characterized in that, in order to increase the length of the gasket by reducing the pressure of the pipeline on the walls of the well, the drilling fluid in front of the pipeline is displaced from the well and simultaneously pulling the pipe tight the walls of the well.