Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate
2006-10-17
2006-10-17
Bagnell, David (Department: 3672)
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
C166S055000, C166S063000, C175S002000, C102S704000
Reexamination Certificate
active
07121340
ABSTRACT:
An apparatus for reducing the post-detonation pressure of a perforating gun, the apparatus including a perforating gun carrying at least one explosive charge, wherein when the explosive charge is detonated the explosive charge produces a pressurized detonation gas, and a mechanism for reducing the pressure of the detonation gas proximate the perforating gun. The detonation gas pressure is desirably reduced in a time frame sufficient to create a dynamic underbalance condition to facilitate a surge flow of fluid from a reservoir into a wellbore. The pressure reduction mechanism may include singularly or in combination a heat sink to reduce the temperature of the detonation gas, a reactant to recombine with the reactant gas and reduce the molar density of the detonation gas, and a physical compression mechanism to utilize the waste energy of the detonation gas to create work, simultaneously reducing the temperature of the gas and the molar density of the detonation gas.
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Folse, K., Allin, M., Chow, C., and Hardesty, J.; “Perforating System Selection for Optimum Well Inflow Performance”; SPE 73762 paper presented at the Internal Symposium of Formation Damage; Lafayette, LA; Feb. 20-21, 2002.
Johnson, A. B., Walton, I. C., and Atwood, D.C.; “Wellbore Dynamics While Perforating and Formation Interaction”; SLB Internal Report #PDF01-03; Apr. 1, 2001.
Walton, I. C., Johnson, A. B., Behrmann, L. A., and Atwood, D. C.; “Laboratory Experiments Provide New Insights into Underbalanced Perforating”; SPE 71642 paper presented at the Annual Technical Conference, New Orleans, LA; Sep. 30-Oct. 3, 2001.
Behrmann Lawrence A.
Grove Brenden M.
Kneisl Philip
Walton Ian C.
Werner Andrew T.
Bomar Shane
Castano Jaime A.
Galloway Bryan P.
Schlumberger Technology Corporation
Winstead Sechrest & Minick P.C.
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