Application of Non-rotational Drill Pipe Protector in Horizontal Slimhole of Yaoqing 33-2HF Well

Abstract:

How to reduce drilling friction is the most difficult problem in horizontal drilling. Main tools for friction reducing are bearing sub, low-torque drill pipe, DSTR nipple joint, oscillating drag reduction device, only a few research on non-rotational drill pipe protector for friction reducing has been conducted. Comparing with non-rotational drill pipe protector, the other tools have some limitations, mainly in lower safety for too many subs or joints and key seats creating. Non-rotational drill pipe protector was used in the horizontal section drilling of Yaoqing 33-2HF, the friction between drilling tool and borehole was greatly reduced, so that drilling speed increased by 40.40% and the drilling cycle was shorten 57.79%, which provides reference for long horizontal well operation in the future.