Drilling tool assembly suitable for single-barrel double wells and well drilling method

• Main Authors: LI BAOPENG, LIANG ZHIFENG, WANG RUIYIN, ZHANG SUOSHENG, ZHAO XIAOYONG, BAO WEIWEI, ZHOU HONGLIN, ZHANG AIBING, WANG LITAO, LI PANNING
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention relates to the technical field of well drilling, in particular to a drilling tool assembly suitable for single-barrel double wells and a well drilling method, and aims to relieve the technical problem that in the related technology, a casing pipe is frequently worn through when the well is rotatably drilled along the casing pipe. The drilling tool assembly suitable for the single-cylinder double wells comprises a heavy weight drill rod, a flexible common drill rod, a non-magnetic drill collar, a single-bend screw drilling tool and a roller bit. The heavy weight drill rod, the flexible common drill rod, the non-magnetic drill collar, the single-bend screw drill and the roller bit are sequentially connected. By the adoption of the drilling tool assembly, drilling operation is carried out along the casing without damaging the casing. 本发明涉及钻井技术领域，尤其涉及一种适用于单筒双井的钻具组合及钻井方法，旨在缓解相关技术中沿套管旋转钻井时经常发生磨穿套管的技术问题。该适用于单筒双井的钻具组合包括加重钻杆、柔性普通钻杆、无磁钻铤、单弯螺杆钻具和牙轮钻头；加重钻杆、柔性普通钻杆、无磁钻铤、单弯螺杆钻具和牙轮钻头依次连接。采用该钻具组合，沿套管钻井作业而不损坏套管。