在采用注水保持地层压力的油田,抽油井都具有一定自喷能力,检泵时部分井要进行压井作业。压井作业不仅动用设备多,施工时间长,施工费用高,劳动强度大,而且会使压井液挤入油层,损坏油层,降低油井生产能力。 研制“起、下抽油杆自封装置”的目的,就是为了克服压井作业存在的上述弊病和实 In the use of water injection to maintain formation pressure oil fields, pumping wells have a certain self-spray ability, check the pump when some wells to kill operations. Well killing operations not only use more equipment, construction time is long, high construction costs, labor-intensive, but also will kill fluid into the reservoir, damage to the reservoir, reducing oil production capacity. The purpose of developing a “sucker rod self-sealing device” is to overcome the above shortcomings and realities of well killing operations