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Cause Analysis of Damage of Coiled Tubing Injection Head Chain Drive System
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Xiao-feng RAN1, Yu-si LIU1, Ting YANG1, *, Wei ZHENG2, Chuan-xin RUAN3, Shao-hu LIU1
Science Technology and Engineering | 2025, 25(10) : 4086 - 4092
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Science Technology and Engineering | 2025, 25(10): 4086-4092
• Papers·Petroleum and Natural Gas Industry •
Cause Analysis of Damage of Coiled Tubing Injection Head Chain Drive System
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Xiao-feng RAN1, Yu-si LIU1, Ting YANG1, *, Wei ZHENG2, Chuan-xin RUAN3, Shao-hu LIU1
Affiliations
  • 1 School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
  • 2 Sinopec Four Machinery Petroleum Machinery Co., Ltd., Jingzhou 434000, China
  • 3 Wuhan Qidakang Energy Equipment Co., Ltd., Wuhan 431400, China
Published: 2025-04-08 doi: 10.12404/j.issn.1671-1815.2405713
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The injection head is the key equipment to drive the coiled tubing in the coiled tubing operation machine. A fault occurred during the operation of a LG450 injection head, and it was found that the chain drive system was seriously damaged after disassembly. The macro and micro morphology analysis of the chain drive system shows that there are arc-shaped scratches on the outer side of the gear teeth and inclined scratches on the tooth surface. The chemical composition test, hardness test and metallographic test were carried out on the sprocket teeth, and the results showed that the material met the process requirements. The finite element simulation of the meshing process of the sprocket and the chain is carried out. The results show that the contact pressure distribution is consistent with the friction marks on the tooth surface and side of the failed sprocket. It is revealed that the failure reason of the chain drive system of the injection head is the spatial intersection of the chain roller and the sprocket axis, and the abnormal meshing of the roller and the gear teeth. This study shows that the motion state of the sprocket chain will have an important impact on the safety of the injection head, which is of great significance to guide the design and processing of the injection head.

injection head  /  sprocket  /  failure analysis  /  finite element simulation  /  wear
Xiao-feng RAN, Yu-si LIU, Ting YANG, Wei ZHENG, Chuan-xin RUAN, Shao-hu LIU. Cause Analysis of Damage of Coiled Tubing Injection Head Chain Drive System[J]. Science Technology and Engineering, 2025 , 25 (10) : 4086 -4092 . DOI: 10.12404/j.issn.1671-1815.2405713
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Article Info
doi: 10.12404/j.issn.1671-1815.2405713
  • Receive Date：2024-07-30
  • Online Date：2026-01-12
  • Published：2025-04-08
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History
  • Received：2024-07-30
  • Revised：2025-01-17
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Affiliations
    1 School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
    2 Sinopec Four Machinery Petroleum Machinery Co., Ltd., Jingzhou 434000, China
    3 Wuhan Qidakang Energy Equipment Co., Ltd., Wuhan 431400, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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