| 摘要 |
A locking device allows a cable to be immobilized in translation in relation to a side wall entry sub inserted in a string of tubular elements taken down into a well bore as long as the tractive forces that can be applied to the cable remain limited. The locking device includes a tubular coupling made of two complementary parts which can be tightened around the cable with screws of a limited resistance and an insert fastened in a recess of the sub fitted with a cylindrical inner cavity which can contain the coupling and prevent its translation while leaving it free to turn around on itself. The insert is fitted with a mouthpiece adapted for releasing the cable from the coupling when a thrust load exerted on the cable is sufficient for breaking the screws. |
