Wells – Processes – With indicating – testing – measuring or locating
Patent
1991-03-05
1992-05-19
Suchfield, George A.
Wells
Processes
With indicating, testing, measuring or locating
166284, E21B 333, E21B 4312, E21B 4706
Patent
active
051139421
ABSTRACT:
The present invention provides a reliable, high efficiency perforation breakdown process. The inventive process, which utilizes a treating fluid and ball sealers, can be used in all types of wells. In the inventive breakdown process, the number of perforations existing downhole which have already been opened but have not yet been temporarily sealed is determined from observed wellhead pressures and/or wellhead pressure changes. A treating fluid flow rate is then established such that (i) the treating fluid will continue to flow through the already opened perforations which have not yet been sealed at a velocity which is at least as high as the minimum effective sealing velocity but (ii) maximum safe wellhead pressure will not be exceeded when one or more additional perforations is sealed.
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Halliburton Company
Kent Robert A.
Suchfield George A.
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