电缆捞矛的结构改进与应用

Structural improvement and application of cable fishing spear

使用钢丝绳、钢丝、铠装电缆或连续油管等线缆进行软打捞作业时,因矛齿焊接部位易被腐蚀、抗剪切强度弱等因素,经常发生脱齿现象,导致打捞效率低。根据内捞矛矛齿根部的形状在两侧矛臂上设计开窗,把矛齿根部插入窗口内,并在矛臂内外两侧焊接固定矛齿,通过对现有捞矛矛齿的固定方式进行改进,矛齿的抗拉强度提高至改进前的2倍多,强度显著增强,从而提高了打捞作业的成功率。某油田一口深井在测量吸水指数时,因井内H_(2)S腐蚀,导致测井电缆落井。应用改进后的内捞矛,利用原滚筒上余留的电缆,成功打捞出落井的近6000 m单芯测井电缆。改进后的电缆捞矛因矛齿强度高,较好地满足井下流体腐蚀、打捞负荷大等恶劣工况下打捞作业需要。

When using steel wire rope,steel wire,armored cable or CT and other cables for soft salvage operation,due to the corrosion welding part of spear and teeth,weak shear strength and other factors,tooth removal often occurs,resulting in low salvage efficiency.According to the shape of the root of the inner spear tooth,design the window on the two sides,insert the root of the spear tooth into the window,and weld both sides of the spear arm.By improving the fixation method of the existing spear tooth,the tensile strength of the spear teeth is more than twice as strong as before the improvement,and thus the success rate of the salvage operation is improved.When a deep well in an oil field measures the water absorption index,the logging cable falls into the well due to the H_(2)S corrosion in the well.Using the improved inner spear,using the remaining cable on the original drum,successfully salvaged the nearly 6000 m single core logging cable out of the well.The improved cable spear,due to the high strength of the spear teeth,better meets the needs of the spear operation under bad working conditions such as underground fluid corrosion and large salvage load.