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鑽孔竣工后,往往由于井內情況不佳,致使套管难以拔出;或者在鑽进中发生夾鑽事故,殘留于井內的粗徑鑽具,既不能扩井套取,反回上头以后,又不允許以小徑从中穿过鑽进,或亦无其他办法处理,势必採用水压切管器下入适当处,以分段切断而后分段取出。实际經驗証明,由于分段切断,故使井壁对套管(或故障岩心管)的阻力大大减少,因而取出是比較容易的。我队过去使用水压切管器,无论在分段起拔套管或处理故障当中,都是較为成功的。現仅就我队使用之經驗与个人体会,初步介紹如后,以供参考。
After completion of the drilling, often due to poor conditions within the well, resulting in casing difficult to pull out; or drill in the accident occurred during the drill, the remaining in the well of large diameter drill, In the future, they are not allowed to go through the trails through them or they are not dealt with in any other way. It is bound to use a hydraulic pipe cutter to place them in the proper place to cut them in sections and then remove them in sections. Practical experience shows that, due to the sub-cut off, so the shaft wall casing (or core tube) greatly reduce the resistance, so the removal is relatively easy. Our team used hydraulic pressure pipe cutters in the past, both in the sub-casing or casing failure, which are more successful. Now only my team to use the experience and personal experience, the initial introduction, such as for reference.