φ95mm有杆抽油泵失效分析及预防措施

Failure analysis and precautions for *J95mm subsurface sucker rod pump.

根据胜坨油田近几年采用９５ｍｍ有杆抽油泵提液的实践，分析了造成这种抽油泵失效的原因，包括与其配套的脱节器失效、抽油杆断脱、泵漏、电动机不配套和生产管理不善等。为增强泵的提液能力和工作可靠性，提出５项预防措施：（１）选择有充足供液能力的油井；（２）在保持相同泵效的情况下，泵的沉没度应略大于小泵，推荐按４５０～５００ｍ设计；（３）采用Ｈ级超高强度抽油杆柱，并在杆柱底部配置一定重量的加重杆；（４）采用长冲程、低冲次的参数匹配，推荐光杆冲程大于５ｍ，冲次小于６ｍｉｎ－１；（５）为提高泵筒、活塞和阀座的防腐耐磨性，推荐采用“氧化锆阀球和阀座＋喷焊柱塞＋氮化泵筒”的结构形式。

Based on the practice of the use of *J95mm subsurface sucker rod pump in Shengtuo Oilfield in recent years, the causes of the failure of the pump are analyzed, and relevant precautions are put forward: (1)selecting oil wells with sufficient fluid supply for pumping; (2)under the condition of the pump efficiency being the same, the submergence depth of the pump being somewhat larger than that of the small pump, and 450500m being feasible; (3)adopting Grade H ultrahighstrength rod string and fixing a sinker bar at the bottom of the rod string; (4)selecting long stroke and low pumping speed, and more than 5m stroke and less than 6min-1 pumping speed being recommended; (5)adopting zirconium oxide valve ball and seat + spray welded plunger + nitrided barrel.