Volume 45 Issue 3
May  2017
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ZHANG Yaming, GAO Zhentao, LI Jun, YANG Jing, ZHANG Yi, ZHANG Yanru. The Deep and Slim Casing Milling Technology of Well SU7 in Suqiao Gas Storage[J]. Petroleum Drilling Techniques, 2017, 45(3): 38-41. DOI: 10.11911/syztjs.201703007
Citation: ZHANG Yaming, GAO Zhentao, LI Jun, YANG Jing, ZHANG Yi, ZHANG Yanru. The Deep and Slim Casing Milling Technology of Well SU7 in Suqiao Gas Storage[J]. Petroleum Drilling Techniques, 2017, 45(3): 38-41. DOI: 10.11911/syztjs.201703007
shu

The Deep and Slim Casing Milling Technology of Well SU7 in Suqiao Gas Storage

  • 1.

    Gas Storage Administrative Office, PetroChina Huabei Oilfield Company, Langfang, Hebei, 065007, China;

  • 2.

    Exploration and Development Research Institute, PetroChina Huabei Oilfield Company, Renqiu, Hebei, 062552, China

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  • Received Date: October 16, 2016
  • Revised Date: May 12, 2017
    Graphical Abstract
    • Abstract
  • The casing milling of Well SU7 in Suqiao Gas Storage was exposed to a series of risks due to its deep and slim hole.For example,returning of iron filings was difficult,drill pipe sticking tended to happen easily and the fishing head was lost.To solve these problems,milling parameters and drilling fluid property parameters were determined according to the milling speed control equation and the iron fillings suspension force calculation equation.In addition,the driving mode based on hydraulic swivel was adopted,and the bottom hole assembly was optimized.Thus,a casing milling technology suitable for deep and slim holes was developed.This technology was applied in Well SU7,no downhole failure occurred during 50.0 m continuous casing milling,and the casing milling efficiency more than doubled.The results demonstrated that this casing milling technology is suitable for deep and slim holes and can meet the milling requirements of plugged casing sections in abandoned wells in Suqiao Gas Storage,improve milling efficiency and avoid downhole failure.This techniqueis applicable to the casing milling of oil and gas wells having similar conditions.
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    • References (7)
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