岩心钻探工艺-精品.pptVIP

BAORT LONGYEAR BAORT LONGYEAR BAORT LONGYEAR 外锥：流量过低、钻杆泄露 内锥：钻速过快（切入量过大、钻压过大） 外径磨损：流量过小、钻杆泄露、扩孔器外径磨损、振动大（降低转速） 过度磨损：切入量过大，减小钻压和转速，更换硬胎体钻头 钻头抛光：切入量过小，更换软胎体钻头 胎块破裂：钻压过大、跑钻、干孔投放内管、管钳夹持器等、钻孔直径小（扩孔器磨损） 烧钻：钻井液缺失（检查泥浆泵、钻杆密封）、钻压过高、检查内管与钻头内台阶间隙 BAORT LONGYEAR’S STAGE3 Outside Diameter Gauge Loss外径磨损 Possible causes and solutions: Vibration - Lower the rotational speed.Lack of in-hole fluid circulation - Increase the pump rate.The bit is reaming an undersized drill hole - Check the gauge diameter of the reaming shell in use and replace if found to be undersized. 可能原因、技术措施: 振动大—降低转速流量过低—增加流量钻孔直径小（扫孔）—检查扩孔器外径 Inside Diameter Gauge Loss内径磨损 Possible causes and solutions: Overfeeding the bit - Reduce the penetration rate. Damage from drilling into highly unconsolidated material - Cement the drill hole or change to a harder (lower number) Dimatec “D-Series” or “HR-Series” matrix type. Drilling over lost core - Examine the core tube contents. Lack of fluid circulation - Check the inner tube length adjustment to ensure that there are no fluid restrictions within the core barrel assembly. Also check the in-hole circulation pump rate and the drill rod string for leaks 可能原因、技术措施: 切入量过大 —降低钻速. 破碎地层—水泥固孔或更换硬胎体钻头 残留岩心—检查取心钻具 冲洗不充分—检查内管长度（间隙）、泥浆泵、钻杆密封 Cracked Waterways胎块破裂 原因: 钻压过大。An excessive bit load was applied. 跑钻。The bit, core barrel and drill rod string were accidentally dropped in the drill hole. 干孔投放。The wireline inner tube assembly was accidentally allowed to free fall through the drill rod string in a dry hole. 夹坏。The bit was accidentally crushed by the rod holder or foot clamp Concave Face Wear内锥 切入量过大。This wear pattern frequently results from the use of a penetration rate that is too high for the rotational speed being used (overfeeding). This wear pattern is also caused by “grinding core”. Convex Face Wear外锥 Possible causes and solutions: 冲洗不充分。Insufficient fluid circulation across the bit face - Check the circulation pump and drill rod string for leaks; inc