CAJ | 학술논문

由于常规泄油器须投杆剪断泄油销钉后泄油，致使对于抽油杆断的油井无法投杆而不能实现泄油，且泄油后不能二次关闭。针对常规泄油器存在的缺陷，借鉴Y221封隔器工作原理，通过对换向机构的理论计算，研制了可关闭旋转式泄油器。该工具采用下放旋转并上提管柱实现泄油功能、再次下放管柱关闭泄油孔的工艺设计，除能在不起抽油杆柱情况下实现泄油外，还可实现泄油器反复开关使用，避免带液体起管柱伤害环境。该工具在中原油田采油三厂进行了室内实验并在泵深为3000 m以上的油井中进行现场试验，成功率100%，可进一步推广使用。
유우상규설유기수투간전단설유소정후설유，치사대우추유간단적유정무법투간이불능실현설유，차설유후불능이차관폐。침대상규설유기존재적결함，차감Y221봉격기공작원리，통과대환향궤구적이론계산，연제료가관폐선전식설유기。해공구채용하방선전병상제관주실현설유공능、재차하방관주관폐설유공적공예설계，제능재불기추유간주정황하실현설유외，환가실현설유기반복개관사용，피면대액체기관주상해배경。해공구재중원유전채유삼엄진행료실내실험병재빙심위3000 m이상적유정중진행현장시험，성공솔100%，가진일보추엄사용。
For conventional oil drain device, oil drain can be realized only by dropping a bar to cut off the drain pin.But in oil wells where the sucker rod is broken, oil drain cannot be realized because the bar cannot be dropped, and secondary shut-in cannot be achieved after oil drain. In view of the drawbacks of conventional oil drain devices and by making reference to the working principle of Y221 packer, a closable rotary oil drain device has been developed by conducting theoretical calculation of reversing mechanism. This tool is designed to realize oil drain function by lowering the pipe while rotating and picking up the pipe and then closing the drain hole by lowering the string. It is of novel structure, simple in operation and reliable in leakproofness. Except that it can realize oil drain without tripping out the rod string, it can realize repeated use of switch on the oil drain device, hence avoiding damaging the environment by tripping out the string with liquid. This tool was tested indoor in No. 3 Oil Production Plant in Zhongyuan Oilifeld and was ifeld tested in oil wells with pump depth of over 3 000 m. The successful rate was 100%, so it can be further promoted and applied.