초록 ▼

A device for anchoring a probe in a well by opening at least one arm pivotable with respect to the body of the probe by a spring moving a rod in a guide housing of the body and operating arms. In a closed position of the arm, the rod is locked by a bolt and a hydraulic fluid contained in a chamber a

A device for anchoring a probe in a well by opening at least one arm pivotable with respect to the body of the probe by a spring moving a rod in a guide housing of the body and operating arms. In a closed position of the arm, the rod is locked by a bolt and a hydraulic fluid contained in a chamber and maintained at the same pressure as the pressure external to the probe is used for driving the bolt, when the pressure of this fluid is applied thereto intermittently by an electromagnetic valve.

대표청구항 ▼

An anchorage device for immobilizing an apparatus lowered into a well by outwardly opening at least one anchorage arm which may pivot with respect to the apparatus, the anchorage device comprising a body, at least one spring, disposed in said body, a movable rod slidably positioned in said body and

An anchorage device for immobilizing an apparatus lowered into a well by outwardly opening at least one anchorage arm which may pivot with respect to the apparatus, the anchorage device comprising a body, at least one spring, disposed in said body, a movable rod slidably positioned in said body and driven in translation by the expansion of the spring, means connecting said rod to the anchorage arm for transforming the translational movement of the rod into a pivoting movement of the anchorage arm and releasable means for immobilizing the rod in a compression position of the spring, said releasable means comprising a bolt and means for pushing the bolt into engagement in a radial recess in the rod in the compression position of the spring, said anchorage device also comprising hydraulic means for moving the bolt out of engagement with the rod and releasing the rod, said hydraulic means including a cavity formed in the body of the apparatus, a head firmly secured to the bolt with a larger section than said bolt and adapted for sliding in said cavity, and a hydraulic circuit for intermittently applying a fluid to said bolt a pressure which is substantially constantly equal to the pressure prevailing in the well, thereby disengaging the bolt from the rod.