A method for treating the wellhead of an abandoned oil well in soft mud layer
A treatment method and technology for oil wells, which are applied in wellbore/well components, earthwork drilling, drilling equipment, etc., can solve problems such as position deviation and accumulation of water, and achieve the prevention and control of aggregation, reasonable treatment methods, and high treatment efficiency. Effect
Active Publication Date: 2022-06-03
国家能源集团宁夏煤业有限责任公司双马一矿 +2
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Problems solved by technology
These oil wells in the Shuangma Minefield have a major impact on the safe and efficient mining of the mine. However, during the process of plugging the abandoned oil wells, it was found that the wellhead of the abandoned oil wells of Ma Qian 22 was damaged by local villagers, and the position of the abandoned oil wells of Ma Qian 22 was displaced. The wellhead of the abandoned oil well is located in the low-lying place of the wellhead of the wind shaft of Shuangma Coal Mine, where the Quaternary loess layer is thicker, and the low-lying place has accumulated water for a long time. The location of the wellhead of the well is limited by environmental conditions, and large-scale mechanical equipment cannot meet the construction requirements. At the same time, in order to safely block the abandoned oil well, special treatment is required for the wellhead; therefore, it is necessary to provide a reasonable treatment method and a safe and reliable treatment environment. It is very necessary to treat the wellhead of abandoned oil wells in the soft mud layer where the soft mud near the wellhead of the abandoned oil well is prevented.
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[0036] Step 2), manually process or customize the pipeline of φ1200mm*L3000mm*D8mm, use a crane to remove the φ1200mm*
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The invention relates to a method for treating the wellhead of an abandoned oil well in a soft mud layer, comprising step 1), using large-scale equipment forklifts, excavators, and dump trucks to remove the soil layer near the surface wellhead; step 2), using a crane to adjust the pipeline into the wellhead of the abandoned oil well; step 3), use a forklift to press the pipeline into the soft mud layer, and then manually process the sludge in the pipeline. When the difference between the upper edge of the pipeline and the sludge outside the pipeline is 500mm, the pipeline is docked; step 4), run the casing and connect it with the original abandoned oil well, and pour the gap between the inside of the pipe and the casing with cement; step 5), and then determine the length of the external casing according to the distance from the ground to the upper edge of the casing, and then Use the shunting car to dock the external casing with the fixed casing, and then landfill and compact the surrounding casing; the invention has the advantages of reasonable processing method, safe and reliable processing environment, and prevention of ooze near the wellhead of abandoned oil wells Advantages of gathering towards the wellhead.
Description
A kind of wellhead treatment method of abandoned oil well in soft mud layer technical field [0001] The present invention relates to the technical field of oil well processing, in particular to a method for processing the wellhead of an abandoned oil well in a soft mud layer. Background technique The treatment of the wellhead of the abandoned oil well is based on the available value of the abandoned oil well or after the oil exploitation is completed. Abandoned oil wells are not plugged, which has a certain impact on the surface mining resources in the overlapping area. The line mining belongs to the vertical direction of the earth. In order to restore the original abandoned oil wells to achieve the purpose of recovering oil or reduce waste The impact of oil wells on the production of resources, etc. At the same time, due to the long-term construction of abandoned oil wells, the original construction surface has undergone great changes. As a result, the wellhead of ...
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IPC IPC(8): E21B41/00E21B17/00
CPCE21B41/00E21B17/00
Inventor马兴华肖江马智孙亚超张刚梁顺张昭盛林
Owner国家能源集团宁夏煤业有限责任公司双马一矿