| 摘要 |
Equipment for depositing processing products in wells after being lowered inside production tubes for depositing cement to seal perforations in the production tube and also for depositing detergents or acid. A syringe comprises a clock mechanism which, after a given period of time and through the medium of a striker for piercing a cap which seals a pressurized oil reservoir, actuates a hydraulic bolt comprising a barrel, a piston, a fixed liner encased in a movable liner and means for maintaining the movable liner in a raised position. A central rod rigid with the movable liner traverses a syringe body, of which the filling space is provided with discharge orifices co-operating with a valve carried by the end of the central rod.
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