可调式防脱键顶杆的研制与应用

Development and application of adjustable anti backoff mandril

高彦峰 1, 晃文学 1,莫文丽 1,李晓安 1,张晓龙 2

Gao Yanfeng1， Chaowenxue1，Mo wenli1， Li Xiaoan1， Zhang Xiaolong2

1.中国石化中原石油工程有限公司钻井工程技术研究院，河南 濮阳 457001;2.中国石化中原石油工程有限公司钻井二公司，河南 濮阳 457001

1.Research Institute of Drilling Engineering and Technology， Zhongyuan Petroleum Engineering Co. Ltd.， SINOPEC， Puyang
457001， China; 2.No.2 Drilling Company， Zhongyuan Petroleum Engineering Co. Ltd.， SINOPEC， Puyang 457001， China

座键式 MWD 仪器在大斜度定向井和水平井随钻坝量施工中，时常出现脱键现象，导致无法形成正常的钻井液脉冲信号，影响钻井时效。为了解决这一问题，针对仪器脱键的原因展开了研究，研制出可调式防脱键顶杆。现场应用表明，新 研制的可调式顶杆能解决海蓝 MWD、QDT-MWD 等座键式随钻测量仪器施工中的脱键问题，提高了仪器入井成功率，为顺利进行随钻测量施工提供了保障，具有较大的实用价值和广阔的应用前景。

The phenomenon of off-seat often occurs during the measured services by seated MWD in highly-deviated well and horizontal well， which results in no normal mud pulse signal from the tool and consequently cuts down the speed and efficiency of drilling  work. In order to overcome  the problem，  we analyzed the causes of off-seat and designed  an adjustable anti-backoff mandril. The site application shows that the anti-backoff mandril can avoid off-seat of seated tools such as Hailan MWD， QDT- MWD and so on， increasing the success rate of MWD tool in well greatly and ensuring smooth direction and measurement work. So it has great practical value and broad application prospect.

10.6056/dkyqt201404032