Pumping equipment and pumping rod group under-pressure working method

The invention provides pumping equipment and a pumping rod group under-pressure working method. The pumping equipment comprises a wellhead device, a sealing assembly and a pumping rod group, wherein the wellhead device is arranged at a wellhead of a pumping well, and the wellhead device is provided...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LIU CHONGYONG, ZHOU XIAOYI, MENG YONGLI, XIE BIN, XUE JIN, HU CHENGJUN, QIU FUSHOU, FU DENGWEI, WANG ZHUOFEI, FAN YUXIN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention provides pumping equipment and a pumping rod group under-pressure working method. The pumping equipment comprises a wellhead device, a sealing assembly and a pumping rod group, wherein the wellhead device is arranged at a wellhead of a pumping well, and the wellhead device is provided with an installation channel; the sealing assembly is detachably connected with the wellhead device,and the sealing assembly is provided with a sealing channel; and the pumping rod group is movably arranged at the sealing channel and the installation channel in a penetrating mode, the pumping rod group comprises a polished rod, a pumping rod and an anti-loosening structure, the polished rod is in threaded connection with the pumping rod, the polished rod is positioned at the sealing channel andforms a multi-stage dynamic seal with the sealing assembly, the anti-loosening structure is detachably connected with the polished rod and arranged in the manner of moving in the axial direction of the polished rod, and the a