Protective device for directional penetrating pipeline
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A technology of directional crossing and protective devices, which is applied in the direction of pipeline protection, pipeline damage/abrasion prevention, pipeline support, etc., which can solve problems such as failure of crossing pipelines, and achieve the effects of avoiding uneven force, reliable sealing structure, and small space occupation
Inactive Publication Date: 2015-07-15
SOUTHWEST PETROLEUM UNIV
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[0003] The object of the present invention is: in order to overcome the phenomenon that the crossing pipelines are prone to failure in the existing oil and natural gas fields, a protective device for crossing pipelines is specially provided. The failure of the crossing pipeline caused by external factors such as debris flow and artificial blasting can realize long-term normal transportation of the crossing pipeline
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[0008] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0009] Such as figure 1 As shown, the protective device for directional crossing pipeline is composed of crossing pipeline 1, end shell 2, end cover 3, screw 4, thickened pipeline 5, protective pipeline 6, support section 7, baffle plate 11, sealing ring 12 , slips 13, and its structural feature is that: the protective pipe 6 is set outside the crossing pipe 1, the total length of the protective pipe 6 is equal to the length to be protected in the crossing pipe 1, the protective pipe 6 includes at least two sections of steel pipes, and the steel pipes are used Welding connection, the end of the protective pipe 6 is welded to the thickened pipe 5; a support section 7 is arranged inside the protective pipe 6 near the welding position, and the support section 7 is composed of an upper pretensioner 8, a lower pretensioner 9 and slips 13 components...
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Abstract
The invention relates to a protective device for a directional penetrating pipeline. The problems that the penetrating pipeline is crushed, damaged and locally deformed are solved. According to the technical scheme, a protective pipeline is arranged outside the penetrating pipeline in a sleeved mode, the length of the protective pipeline is equal to that of the penetrating pipeline needing to be protected, a sealing ring and a slip are arranged at the two ends of a protective pipeline, fluid is filled into a circle between the protective pipeline and the penetrating pipeline, and the pressure of the fluid is smaller than that of internal media in the penetrating pipeline. The slip and the sealing ring seal the annular fluid and tightly hold the penetrating pipeline. The penetrating pipeline is effectively protected, the situation that pipeline is crushed, broken, injured by a crashing object and locally deformed due to wellbore instability is avoided, the penetrating pipeline is prevented from being repaired or replaced or penetrating a new pipeline again, and the protective device is especially suitable for protecting pipelines penetrating through rivers, gravel layers, soft and hard connecting strata, faults and easily-collapsing strata and the like.
Description
technical field [0001] The invention relates to a protective device for directional crossing pipelines in the field of petroleum and natural gas, and is particularly suitable for the protection of pipelines crossing rivers, soft and hard formations, gravel layers, faults and easy-to-collapse formations. Background technique [0002] With the development of my country's pipeline industry, more and more attention has been paid to the non-excavation crossing of pipelines. Using horizontal directional drilling for pipelines for crossing construction has become a main way of pipeline crossing. This method can not only be used for crossing rivers and waterways, but also widely used for crossing highways, railways, airports, coasts, islands, mountains, tropical rainforests and dense buildings, cultural relics protection areas, pipeline-intensive areas, etc. For example, the West-East Gas Pipeline crosses deserts, Gobi, mountains, hills, plains, basins, loess plateaus, water network...
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