A method for removing stolen oil steel drills in oil pipelines and repairing oil pipelines
A technology for oil pipelines and repair pipes, applied in the direction of pipes/pipe joints/fittings, pipe components, pipeline protection, etc., can solve problems such as damage to the integrity of oil pipelines, crude oil leakage, hidden safety hazards, etc., to facilitate large-scale promotion and application, Avoid damage and repair the effect of small damage
Active Publication Date: 2017-10-17
PETROCHINA CO LTD
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Problems solved by technology
[0005] When the existing technology is used to repair the oil pipeline, the integrity of the oil pipeline is destroyed, which brings safety hazards to the oil transportation process. At the same time, crude oil leakage is inevitable during the repair process, and the leaked crude oil will cause serious pollution to the environment.
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Embodiment 1
[0051] This embodiment provides a method for removing stolen oil steel brazing from an oil pipeline and repairing the oil pipeline. The length is 41km and the specification is D219×6.4mm (that is, the outer diameter of the steel oil pipeline is 219mm and the wall thickness is 6.4mm). Take the steel oil pipeline 1 as an example, the diameter of the top of the steel drill 2 remaining on the oil pipeline 1 is 14mm, and the specific operation steps for the repair of the oil pipeline 1 are as follows:
[0052] Step 1. Weld the steel bar 3 with a diameter of 13mm and a length of 0.9m on the top of the steel drill 2 remaining on the oil pipeline 1, and grind the weld between the steel drill 2 and the oil pipeline 1, so as not to wear through the oil pipeline In the case of the pipe wall of line 1, the weld should be polished as thin as possible to reduce the thickness of the weld on oil pipeline 1.
[0053] Step 2. Pass the nut 4 with an inner diameter of 15.294mm through the steel b...
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The invention discloses a method for removing an oil stealing steel chisel on an oil pipeline and repairing the oil pipeline, and belongs to the field of oil exploration of the oil industry. The method comprises the following steps: welding a reinforcing steel bar on the top of a steel chisel remaining on an oil pipeline, and polishing the weld joint of the steel chisel and the oil pipeline so as to reduce the thickness of the weld joint of the oil pipeline; sleeving the steel chisel with a screw nut, and fixing the bottom of the screw nut on the outer wall of the oil pipeline; knocking the top surface of the steel chisel by using a hammer till cracks are generated at the weld joint of the steel chisel and the oil pipeline, stopping knocking and pulling out the steel chisel from the oil pipeline by using the reinforcing steel bar; screwing a bolt matched with the screw nut into the screw nut, sealing the seam between the bolt and the screw nut, and sawing off the part higher than the screw nut, of the bolt, thereby completing repairing of the oil pipeline. By adopting the method, the stress range of the steel chisel can be expanded by using the reinforcing steel bar, and thus operators can exert force to the reinforcing steel bar to pull out the steel chisel from the oil pipeline. In addition, by adopting the method, integrity of the oil pipeline can be maintained, the operation is simple and convenient, and crude oil does not leak off.
Description
technical field [0001] The invention relates to the field of oil extraction engineering in the petroleum industry, in particular to a method for removing stolen oil drills from oil pipelines and repairing oil pipelines. Background technique [0002] Oil pipelines are important transportation equipment in the process of oil development, through which crude oil can be transported to designated locations for processing and storage. However, in order to make huge profits, some lawbreakers drilled holes in the oil pipelines with steel rods, and transported crude oil without permission through the holes in the oil pipelines, resulting in the loss of national oil resources. In addition, the criminals left steel brazing on the oil pipeline after stealing oil. These brazing steel have a serious impact on the transportation of crude oil, and the integrity management of the pipeline. Therefore, it is very necessary to provide a method for removing the stolen oil from the oil pipeline ...
Claims
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IPC IPC(8): F16L55/16F16L58/12F16L59/02
CPCF16L55/1604F16L58/12F16L59/027
Inventor 武玉双窦勤光卫青松路遥军李渊
Owner PETROCHINA CO LTD