Second, the electric submersible pump connected to the pipe thread pretightening force enough (or not pre-torque).
第二，电潜泵各管螺纹联接的预紧力不够（或预紧扭矩不够）。
The choke ACTS as controlling the production and lowering the back pressure in the electric submersible pump. Because of the high speed of liquid the life of the choke is short.
油嘴在电泵井的生产中起控制产量和降低回压的作用，但是在日常生产中，油嘴孔很容易被高速液体刺大，因而使用寿命短。
The wellhead cable penetrator is a kind of device for penetrating the tubing hanger and upper flange to connect the electric submersible pump and surface power at the production wellhead of ESP.
井口电缆穿越器是电潜泵采油井口上用于贯穿油管挂和上法兰，并连接电潜泵和井上电源的一种装置。
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