SU968552A1

SU968552A1 - Elastic tube

Info

Publication number: SU968552A1
Application number: SU782699456A
Authority: SU
Inventors: Александр Михайлович Изосимов; Станислав Селиверстович Носаль; Юрий Александрович Артемов; Игорь Яковлевич Шульга; Валентин Иванович Гнатенко
Original assignee: Куйбышевский институт инженеров железнодорожного транспорта; Политехнический Институт Им.В.В.Куйбышева
Priority date: 1978-12-21
Filing date: 1978-12-21
Publication date: 1982-10-23

Description

Изобретение относится к нефтяным и газовым скважинам с применением гибкой бурильной колонны и может быть использовано в нефтяной, газовой и других отраслях промышленности при бурении скважин на нефть,, газ, воду и т. n.S и при транспортировке различных продуктов.The invention relates to oil and gas wells using a flexible drill string and can be used in oil, gas and other industries when drilling oil, gas, water, etc. n.S wells and transporting various products.

Известна конструкция- гибкой трубы^ содержащая внутреннюю герметизирующую камеру с навитым на нее спиральным каркасом, поверх которого уложены грузонесущие элементы - стальные канаты, и наружную резиновую оболочку [iy Недостатком этой конструкции являются большие диаметральные габариты гибкой трубы, вследствие чего ухудшается ее гидравлическая характеристика и проходимость при пуско-подъемных операциях в скважине, заполненной промывочной жидкостью.A known design is a flexible pipe ^ containing an internal sealing chamber with a spiral frame wound around it, on top of which load-bearing elements are laid - steel ropes, and an external rubber sheath [iy The disadvantage of this design is the large diametrical dimensions of the flexible pipe, as a result of which its hydraulic performance and throughput are worsened during start-up operations in a well filled with flushing fluid.

При изгибе трубы на блоках и барабанах под растягивающей нагрузкой происходит смещение грузонесущих элемен3 968552When a pipe bends on blocks and drums under a tensile load, the load-bearing elements shift 3 968552

На фиг. 1 изображен элемент гибкой трубы, частичный разрез} на фиг. 2 разрез А-А на фиг. 1.In FIG. 1 shows a flexible pipe element, partial section} in FIG. 2, section AA in FIG. 1.

Гибкая труба имеет герметизирующую камеру 1, спиральный каркас 2, грузо- s несущие элементы 3, установленные в отверстиях каркаса, и наружную оболочку 4.The flexible pipe has a sealing chamber 1, a spiral frame 2, load-bearing elements 3 installed in the holes of the frame, and an outer shell 4.

Герметизирующая камера 1 передает давление промывочной жидкости спираль-10 ному каркасу 2, а наружная оболочка 4 защищает спиральный каркас 2 и грузонесущие элементы 3 от физико-механического воздействия внешней среды. / При растяжении и изгибе гибкой тру-15 < бы растягивающая.нагрузка воспринимается грузонесущими элементами 3, а · ' радиальные нагрузки - спиральным каркасом 2.The sealing chamber 1 transfers the pressure of the flushing fluid to the spiral 10 frame 2, and the outer shell 4 protects the spiral frame 2 and load-bearing elements 3 from the physical and mechanical effects of the external environment. / When tensile and bending, flexible labor-15 would be tensile. The load is perceived by the load-bearing elements 3, and the radial loads are perceived by the spiral frame 2.

Отверстия в спиральном каркасе 2 20 выполнены известными способами до на часть каркаса, причем на внутренней поверхности этой части каркаса делаются пазы также на половину диаметра · грузонесущего· элемента. Части каркаса соединяются в одно целое склеиванием, сваркой или другими известными способами. Грузонесущие элементы 3 установлены в витках спирального каркаса 2 параллельно оси гибкой трубы или по винтовой линии.The holes in the spiral frame 2 20 are made by known methods up to part of the frame, and on the inner surface of this part of the frame grooves are also made half the diameter of the · load-bearing · element. Parts of the frame are combined into one piece by gluing, welding or other known methods. The load-bearing elements 3 are installed in the turns of the spiral frame 2 parallel to the axis of the flexible pipe or along a helix.

Благодаря совмещению грузонесущих элементов спиральным каркасом происходит более равномерное распределение нагрузки между отдельными грузонесущими элементами, что позволяет значительно (почти в два раза) увеличить ресурс гибкой трубы, существенно уменьшается ее гидравлическая характеристика. .Due to the combination of load-bearing elements with a spiral frame, a more uniform load distribution occurs between the individual load-bearing elements, which can significantly (almost double) increase the life of a flexible pipe, and its hydraulic characteristic is significantly reduced. .

вивки каркаса.vivka frame.

Заправка грузонесущих элементов 3 в отверстия витков спирального каркаса 2 осуществлена с помощью специаль- 2$ ных подающих устройств при совмещении отверстий витков.Filling of load-bearing elements 3 into the holes of the turns of the spiral frame 2 was carried out with the help of special $ 2 feeding devices when combining the holes of the turns.

Возможно применение спирального.каркаса, состоящего из двух и более частей. В этом случае сначала нанивается ₃₀спираль из внутренней Насти каркаса, по наружной поверхности делаются пазы на половину диаметра грузонесущего эле-; мента. После этого в пазы устанавлива-: ется необходимое количество грузонесущих элементов и навивается ответнаяIt is possible to use a spiral frame consisting of two or more parts. In this case, at first _{30 a} spiral is strung from the inner Nastya frame, grooves are made on the outer surface to half the diameter of the load-carrying ele- the cop. After that, the required number of load-bearing elements is installed in the grooves:

Claims

.- The invention relates to oil and gas wells using a flexible drill string and can be used in the oil, gas and other industries in the drilling of oil, gas, water, etc., and in the transportation of various products. The known construction is a flexible pipe containing an internal sealing chamber with a spiral frame wound around it, on top of which load-carrying elements, steel ropes, and an external rubber casing 1 are laid. start-up operations in a well filled with flushing fluid. When the pipe is bent on blocks and drums under tensile load, the load-carrying elements are displaced relative to each other in the circumferential direction, which leads to disruption of the structural integrity and redistribution of the load between the individual load-carrying elements, resulting in premature wear. The aim of the invention is to reduce the diameter of the pipe. This goal is achieved by the fact that holes are made in the turns of the spiral frame, and the load-carrying elements are aligned with the frame and installed in its holes. Combining the load-carrying elements with the frame by installing holes in the holes reduces the diametrical dimensions of the flexible pipe and does not allow the elements to move relative to each other in the circumferential direction, which leads to improved hydraulic performance, preserving the integrity of the structure and increasing the service life of the flexible pipe. 3968. FIG. 1 shows an element of a flexible pipe, a partial section in FIG. 2, section A-A in FIG. 1. The flexible tube has a sealing chamber 1, a spiral frame 2, load-carrying elements 3, installed in the holes of the frame, and an outer shell. The sealing chamber 1 transmits the pressure of the washing liquid to the spiral frame 2, and the outer shell 4 protects the spiral frame 2 and the load-carrying elements 3 from the physico-mechanical effect of the external environment. When the flexible pipe is stretched and bent, the tensile load is perceived by the load-carrying elements 3, and the radial loads by the spiral frame.

2. The holes in the spiral frame 2 are made by known methods before winding the frame. The load-carrying elements 3 are filled into the holes of the turns of the spiral frame 2 by means of special feeding devices when aligning the turns of the turns. It is possible to use a spiral frame consisting of two or more parts. In this slone, a spiral is first wound from the inner part of the frame; grooves are made on the outer surface half the diameter of the load-carrying element. After that, the required number of load-carrying elements is installed in the grooves and the second part of the frame is wound in response, and on the inner surface of this part of the frame, grooves are also made half of the diameter of the load-carrying element. Parts of the frame are joined together by gluing, welding or other known methods. The load-carrying elements 3 are installed in the turns of the spiral frame 2 parallel to the axis of the flexible pipe or along a helical line. Due to the combination of the load-carrying elements of the spiral frame, a more uniform distribution of load between the individual load-carrying elements occurs, which allows significantly (almost twice) to increase the life of the flexible pipe, its hydraulic characteristic is significantly reduced. . The invention comprises a flexible pipe containing a sealing chamber, a spiral frame, load-carrying elements and an outer casing, characterized in that, in order to reduce the diametrical dimensions of the pipe, holes are made in the turns of the spiral frame, and the load-carrying elements are aligned with the frame and installed in its holes , Sources of information taken into account in the examination 1. French patent N2207577, cl. F 16 L 33/00, 1972.