pressure balance work over rig
... pressure attenuation 压力衰减 pressure balance work over rig 不压井修井机 pressure balance 压力平衡 ...
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为解决油田修井作业落地油污染问题，研制出一种在不压井的前提下进行作业的防喷作业机。
To solve the pollution problem of dropping crude during field workover operation, a type of blowout controlling unit was researched and manufactured without the prerequisite of well control.
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不压井修井机是针对油田注水井的大修作业而研发的一种不“放溢流”（带压作业）的新型修井设备。
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