Stage 2. Column opening out
Well service & workover crew, including standard equipment, a pump unit with the capacity to build up & hold up the pressure 15MPa during 8-10 hours are required for the conducting of SHMP.
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A Pump unit builds up the initial pressure 1,5-2MPa in the well mouth inside the tubing column, bringing the perforator into the working position, mill-discs thrust against the inside of the production casing.
Mill discs force through the production casing & go out of it with to-and-fro motions in the tubing column with Perforator along the Interval in process with the working pressure in the tubing column increasing stepwise. Mill discs create 1800 diametrically positioned longitudinal slots.
The process of production casing opening out is based on metal plasticization from the forcing in every point & is registered by a weight indicator (hydraulic-weight indicator, electronic weight indicator) or any analogue of this tool.
Special working side surface of mill discs makes a physical impact on slot edges by milling work & it excludes slot healing.
Thereby, high quality of the production casing opening out is achieved.
Itex —