Case number one:
Location: Shaxuanwan Village, Leilong Township, Hengshan County, Shaanxi Province
Construction time: 2016
Incident: Water seepage in wellhead casing and cementing layer
Status: The gas tree in Well Shaan 11 belongs to KQ-600. It was put into production on July 1, 1997. The oil pressure was 23.70MPa and the casing pressure was 23.70MPa before production.
Measures: Use special fixtures to quickly complete the plugging work

Case two:
Oilfield: Changqing, China
Well number: G55-2, gas well
Time: 2015.5
parameter

Cause --- Leakage under the big four-way flange
Work --- It takes 8 hours to make a special shell to seal the leaking part

Case Three:
Customer: Yulin No. 2 Purification Treatment Plant
Time: November 13, 2014
Accident: The gas pipeline leaked, and the amount of gas leakage was obvious. The treatment plant urgently evacuated the surrounding people
Measures: Use special fixtures to quickly complete the plugging work

2015-2017 China Changqing Oilfield Service Statistics: