Pressure responsive perforating and testing system

Details Pressure responsive perforating and testing system Pressure responsive perforating and testing system

1982-04-16

1985-04-09

Leppink, James A.

Boring or penetrating the earth

Boring with explosion in inaccessible hole

With wall engaging packer or anchor

166297, 175 456, E21B 4311

Patent

active

045096040

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a well perforating and testing system includes packer and test valve means for respectively isolating a well bore interval and controlling flow of well fluids therefrom, a perforating gun connected below the packer means, and firing means responsive to a greater pressure in the well annulus above the packer means than in said isolated interval for actuating the perforating gun so that the casing can be perforated at underbalanced pressure conditions.

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Sales brochure of Johnston Perforating Services, Johnston Testers, Inc. (now Johnston-Macco, a division of Schlumberger Technology Corporation), Houston, TX 1948.
Johnston "Shoot-N-Test", 1948 General Sales Catalog appearing in The Composite Catalog of Oil Field and Pipeline Equipment vol. I, pp. 2071-2075 (Gulf Publishing Company, 16th ed., 1948).

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