关键词:

防斜打快, 实时监控, PDC钻头, 弯螺杆, 库车

Abstract:

The main geological characteristics of the Kuqa Piedmont area are thrusting nappe structure，featuring wide changes of stratum lithology and many interbeds. Traditional drilling assembly delivers low rate of penetration and make it difficult to achieve deflection control while fast drilling. After the vertical drilling system was introduced，many problems occurred，for example，the tools had no signals in downhole operation，the deflection control effect was poor and the daily cost was very high. In order to solve these problems，high-efficiency Polycrystalline Diamond Compact（PDC） bit + high-torque bending screw were used in Bozi 34 well. Compared with the PDC bit + PowerV rotary vertical drilling used in adjacent Bozi18 well，the footage of a single bit was increased by 74% and the average rate of penetration rose by 116%. Combined with MWD real-time monitoring，it improves rate of penetration and reduces well deflection，while also significantly cuts drilling costs，contributing to the efficient exploration and development of oil and gas resources in the Kuqa foreland area.

Key words:

deflection control while fast drilling, real-time monitoring, PDC bit, bending screw, Kuqa