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在测取深井泵示功图、检泵以及抽油机的日常修理工作中,需经常对油井管柱进行卸载。卸载是一项繁重而又不安全的体力劳动。尤其目前,大多数采油工人利用在抽油机驴头运行到上死点的瞬间,在井口盘根盒上加上卡子,以卡住光杆。当抽油机由上死点向下死点运行时,使悬绳器与光杆脱离,卸掉油井管柱,使抽油机停机。这种方法虽然省时省力,但极不安全,且卸载后光杆往往被卡子损坏,造成盘根刺漏,而我们研制的光杆卸载器正是避免了上述问题的发生。该卸载器结构简单、工作可靠,长期固定在光杆上便于使用,大大地减轻了工人劳动强度,并且不损伤光杆。
In the daily work of measuring the deep well pump dynamometer, pump and pumping unit, the well string should be unloaded frequently. Unloading is a heavy and unsafe manual labor. In particular, at present, most oil producers employ a clip on the wellhead packing box to catch the polished rod at the moment when the pumping unit runs to the top dead center. When the pumping unit runs from top dead center to bottom dead center, the suspension rope is disconnected from the polished rod, and the oil well string is removed to stop the pumping unit. Although this method is time-saving and labor-saving, it is extremely unsafe. After unloading, the polished rod is often damaged by clips and causes the packing to leak. The optical rod unloader we developed avoids the above problems. The unloader has the advantages of simple structure, reliable working, long-term fixing on the polished rod, ease of use, greatly reducing labor intensity of the worker, and not damaging the polished rod.