초록 ▼

A slickline conveyed perforating method and apparatus is adapted to be disposed in an extremely small diameter cased borehole, especially during extreme overbalanced perforating conditions, and the apparatus includes one or more shock absorbed pressure and temperature measurement gauges adapted for

A slickline conveyed perforating method and apparatus is adapted to be disposed in an extremely small diameter cased borehole, especially during extreme overbalanced perforating conditions, and the apparatus includes one or more shock absorbed pressure and temperature measurement gauges adapted for measuring the pressure and temperature in the small diameter cased borehole before, during, and after the perforating operation. An "extremely small diameter" borehole is defined as a borehole which has a diameter that is always less than the diameter of any production tubing which would normally be inserted into the borehole.

대표청구항 ▼

[ We claim:] [1.] A method of perforating a wellbore, comprising the steps of:(a) lowering a perforating apparatus into a small diameter wellbore, said small diameter wellbore having a diameter which is less than a diameter of a production tubing;(b) measuring a characteristic which exists within sa

[ We claim:] [1.] A method of perforating a wellbore, comprising the steps of:(a) lowering a perforating apparatus into a small diameter wellbore, said small diameter wellbore having a diameter which is less than a diameter of a production tubing;(b) measuring a characteristic which exists within said small diameter wellbore before the perforating step (c);(c) perforating, by said perforating apparatus, a formation penetrated by said small diameter wellbore;(d) measuring a characteristic which exists within said small diameter wellbore during and after the perforating step (c); and(e) retrieving said perforating apparatus from said small diameter wellbore. [8.] A perforating apparatus adapted to be lowered into a small diameter borehole, comprising:connecting means for connecting said perforating apparatus to a wireline or a slickline,said perforating apparatus being suspended from said wireline or said slickline when said connecting means connects said perforating apparatus to said wireline or said slickline and said wireline or said slickline lowers said perforating apparatus into said small diameter borehole,said small diameter borehole being defined as a borehole having a diameter which is less than a diameter of a production tubing;retaining means connected to said connecting means for retaining said perforating apparatus at a particular depth in said borehole;measurement gauge means connected to the retaining means for measuring a pressure which exists within said borehole and storing said characteristic therein,said gauge means measuring said pressure when said perforating apparatus is lowered into said small diameter borehole; andperforating means connected to said gauge means for perforating a formation penetrated by said borehole,said gauge means measuring said pressure within said borehole at a time during the perforating of said formation and after the perforating of said formation by said perforating means.