Wells – Processes – Specific propping feature
Reexamination Certificate
2011-04-05
2011-04-05
Bates, Zakiya W (Department: 3676)
Wells
Processes
Specific propping feature
C166S308100
Reexamination Certificate
active
07918277
ABSTRACT:
An increase in effective propped lengths is evidenced in hydraulic fracturing treatments by the use of ultra lightweight (ULW) proppants. The ULW proppants have a density less than or equal to 2.45 g/cc and may be used as a mixture in a first proppant stage wherein at least one of the proppants is a ULW proppant. Alternatively, sequential proppant stages may be introduced into the formation wherein at least one of the proppant stages contain a ULW proppant and where at least one of the following conditions prevails:(i.) the density differential between the first proppant stage and the second proppant stage is greater than or equal to 0.2 g/cc;(ii.) both the first proppant stage and the second proppant stage contain a ULW proppant;(iii.) the rate of injection of the second proppant stage into the fracture is different from the rate of injection of the first proppant stage; or(iv.) the particle size of the second proppant stage is different from the particle size of the first proppant stage.
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Brannon Harold Dean
Edgeman Randall
Malone Mark
Rickards Allan Ray
Stephenson Christopher John
Baker Hughes Incorporated
Bates Zakiya W
Ditrani Angela M
Jones John Wilson
Jones & Smith, LLP
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