Flexible connection method and device for preventing pipeline suspended spanning
A flexible connection and suspension span technology, used in adjustable connections, pipeline laying and maintenance, pipes/pipe joints/fittings, etc., can solve problems such as difficulties, achieve strong timeliness, increase lateral restraint force and bending stiffness , good corrosion resistance effect
Active Publication Date: 2014-09-03
TIANJIN UNIV
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Problems solved by technology
However, it must be implemented when the pipeline is shut down. In addition, due to the limitation of the use of the pipeline, if the oil pipeline is filled with water or equipped with cable pressure, it will be more difficult to implement this plan.
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[0029] The present invention will be described below in conjunction with the accompanying drawings and embodiments.
[0030] The present invention prevents and repairs the occurrence of the overhanging phenomenon of the submarine pipeline by installing flexible connection devices on the pipeline sections at intervals before laying the submarine pipeline. The specific operation steps are:
[0031] According to the geometric dimensions and material parameters of the specific submarine pipeline, select flanges, flexible hoses and baffles that meet the specifications. In order to improve the ability of the overall pipeline to withstand lateral force, the baffle can be made of a material with a rigidity stronger than that of the connected rigid pipe. After the layout spacing of the flexible connection device is determined by analyzing the specific working conditions before construction, the required quantity of the device can be determined.
[0032] Before the pipe sections are c...
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The invention belongs to the technical field of seabed pipeline facility laying and relates to a flexible connection method for preventing pipeline suspended spanning. In the process of laying the seabed pipeline, flexible connection is adopted for pipeline sections at intervals, and the flexible connection method includes the following steps that according to the size of the seabed pipeline, four flange plates and four or more baffles are selected; the baffles are hinged to one another to manufacture a set of baffles, and by the adoption of the same method, the other set of baffles is manufactured; the two sets of baffles are connected between the two flange plates; a flexible hose is placed between the two sets of baffles; the two ends of the flexible hose are respectively connected with one seabed pipeline section through the flange plates connected with the baffles and the flange plates not connected with the baffles. Meanwhile, the invention discloses a device for implementing the flexible connection method for preventing the pipeline suspended spanning. After the seabed pipeline is connected and laid on the seabed through the device, frequent suspended spanning detecting and maintaining in the later period can be not performed, so that operation is easy, convenient and reliable, and time and labor are saved.
Description
technical field [0001] The invention belongs to the technical field of laying submarine pipeline facilities, and relates to a pipe connection device and method capable of preventing or repairing overhangs of submarine pipelines. Background technique [0002] Due to the complex marine environmental conditions, under the combined action of waves and currents, and the deformation of the pipeline itself, submarine pipelines often produce spans, that is, suspended sections on the submarine pipeline that do not directly contact the seabed surface. Suspended spanning pipelines have an important impact on the safe operation of pipelines and are the main cause of failure of submarine pipelines. Its influence is mainly reflected in: 1) If the span reaches a certain length, due to the action of its own gravity and the impact force of the tidal current, the deformation and internal stress amplitude of the pipeline will increase, and large deformation or even rupture will occur, resultin...
Claims
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IPC IPC(8): F16L1/16F16L27/107
CPCF16L1/161F16L27/1012F16L27/107
Inventor 余建星吴梦宁蒲梦洁俞鹏程黄秀恩郑荣坤
Owner TIANJIN UNIV