关键词: 塔河油田, 机抽井, 光杆, 断脱, 防喷

Abstract: Tahe oilfield Ordovician seam hole type carbonate oil reservoir has deep well with deep depth of burial ultra-thick oil, which results in bad working environment for the thick pump and increasing number of rod-pumped wells with polished rod dropout year by year. And the dropout leads to crude oil leakage and hydrogen sulfide dissipation. So there are larger risks in safety and environmental protection and this leads to loss of production. Combining with the production characteristics of Tahe oilfield pumping well and the existing technologies, blowout preventer for polished rod applicable to Tahe oilfield is eventually developed through the optimization of blowout preventer and material selection. After use, it effectively controls the wellhead after breaking off, which reduces safety risks and contaminated area.

Key words: Tahe oilfield, pumping well, polished rod, dropout, blowout control